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Document And Entity Information - shares	3 Months Ended
Document And Entity Information - shares	Mar. 31, 2012	Apr. 30, 2012
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2012
Entity Registrant Name	SMITH A O CORP
Entity Central Index Key	0000091142
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q1
Entity Filer Category	Large Accelerated Filer
Class A Common Stock [Member]
Entity Common Stock, Shares Outstanding		6,629,810
Common Stock [Member]
Entity Common Stock, Shares Outstanding		39,731,141

Condensed Consolidated Statements Of Earnings - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Continuing Operations
Net sales	$ 468.6	$ 417.4
Cost of products sold	319.5	290.4
Gross profit	149.1	127.0
Selling, general and administrative expenses	105.3	89.3
Interest expense	3.0	1.8
Other (income) expense - net	(29.1)	2.2
Earnings before provision for income taxes	69.9	33.7
Provision for income taxes	22.4	9.5
Earnings from continuing operations	47.5	24.2
Discontinued Operations
Earnings from discontinued EPC operations, less provision for income taxes of $5.7 in 2011		16.8
Net earnings	$ 47.5	$ 41.0
Net Earnings Per Share of Common Stock
Continuing Operations	$ 1.03	$ 0.52
Discontinued Operations		0.37
Net Earnings	1.03	0.89
Diluted Net Earnings Per Share of Common Stock
Continuing Operations	1.02	0.52
Discontinued Operations		0.36
Net Earnings	1.02	0.88
Dividends per share of Common Stock	$ 0.16	$ 0.14

Condensed Consolidated Statements Of Earnings (Parenthetical) $ in Millions	3 Months Ended
	Mar. 31, 2011 USD ($)
Condensed Consolidated Statements Of Earnings [Abstract]
Earnings from discontinued operations, provision for income taxes	$ 5.7

Condensed Consolidated Statement Of Comprehensive Earnings - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Condensed Consolidated Statement Of Comprehensive Earnings [Abstract]
Net earnings	$ 47.5	$ 41.0
Other comprehensive earnings (loss)
Foreign currency translation adjustments	2.8	3.2
Unrealized net gain (loss) on cash flow derivative instruments, less related income tax (provision) benefit of $(0.4) in 2012, $2.1 in 2011	0.6	(3.2)
Reversal of unrealized gain on investments less related tax benefit of $0.7 in 2012	(1.2)
Comprehensive Earnings	$ 49.7	$ 41.0

- Definition

The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the reporting entity. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, but excludes any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

+ References

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+ Details

- Definition

Adjustment that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency of the reporting entity, net of tax.

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- Definition

Reclassification adjustment for unrealized gains or losses realized upon the write-down of securities, after tax.

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- Definition

Change in accumulated gains and losses from derivative instrument designated and qualifying as the effective portion of cash flow hedges, net of tax effect. The after tax effect change includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses.

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- Definition

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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+ Details

Condensed Consolidated Statement Of Comprehensive Earnings (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Condensed Consolidated Statement Of Comprehensive Earnings [Abstract]
Unrealized net gain (loss) on cash flow derivative instruments, less related income tax benefit (provision)	$ (0.4)	$ 2.1
Unrealized gain on investments, related income tax benefit	$ 0.7

Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Mar. 31, 2012	Dec. 31, 2011
Assets
Cash and cash equivalents	$ 367.2	$ 463.4
Marketable securities	60.9
Receivable from sale of securities	64.7
Receivables	386.7	368.4
Inventories	172.2	168.4
Deferred income taxes	32.0	24.6
Investments		162.4
Other current assets	23.0	21.5
Total Current Assets	1,106.7	1,208.7
Property, plant and equipment	628.5	614.0
Less accumulated depreciation	308.6	298.7
Net property, plant and equipment	319.9	315.3
Goodwill	435.1	433.8
Other intangibles	349.6	352.7
Other assets	38.9	38.5
Total Assets	2,250.2	2,349.0
Liabilities
Trade payables	302.8	302.5
Accrued payroll and benefits	32.8	41.9
Accrued liabilities	90.7	74.1
Product warranties	44.1	43.7
Long-term debt due within one year	18.6	18.6
Current liabilities - discontinued EPC operations	13.4	31.5
Total Current Liabilities	502.4	512.3
Long-term debt	300.6	443.0
Pension liabilities	142.1	139.5
Other liabilities	156.1	159.7
Long-term liabilities - discontinued EPC operations	8.3	8.7
Total Liabilities	1,109.5	1,263.2
Stockholders' Equity
Class A Common Stock, $5 par value: authorized 14,000,000 shares; issued 6,664,002 and 7,250,791	33.3	36.3
Common Stock, $1 par value: authorized 60,000,000 shares; issued 41,012,909 and 40,426,119	41.0	40.4
Capital in excess of par value	651.0	652.5
Retained earnings	770.0	729.9
Accumulated other comprehensive loss	(298.7)	(300.9)
Treasury stock at cost	(55.9)	(72.4)
Total Stockholders' Equity	1,140.7	1,085.8
Total Liabilities and Stockholders' Equity	$ 2,250.2	$ 2,349.0

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Mar. 31, 2012	Dec. 31, 2011
Condensed Consolidated Balance Sheets [Abstract]
Class A Common Stock, par value	$ 5	$ 5
Class A Common Stock, shares authorized	14,000,000	14,000,000
Class A Common Stock, shares issued	6,664,002	7,250,791
Common Stock, par value	$ 1	$ 1
Common Stock, shares authorized	60,000,000	60,000,000
Common Stock, shares issued	41,012,909	40,426,119

Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Operating Activities
Net earnings	$ 47.5	$ 41.0
Less earnings from discontinued operations		(16.8)
Adjustments to reconcile earnings from continuing operations to cash provided by (used in) operating activities:
Depreciation and amortization	13.4	10.8
Gain on sale of investments	(27.2)
Net changes in operating assets and liabilities, net of acquisitions:
Current assets and liabilities	(21.4)	(45.6)
Noncurrent assets and liabilities	2.7	(41.7)
Cash Provided by (Used in) Operating Activities-continuing operations	15.0	(52.3)
Cash Used in Operating Activities-discontinued operations	(18.5)	0.1
Cash Used in Operating Activities	(3.5)	(52.2)
Investing Activities
Capital expenditures	(13.1)	(12.4)
Investment in marketable securities	(60.9)
Net proceeds from sale of securities	122.9
Cash Provided by (Used in) Investing Activities-continuing operations	48.9	(12.4)
Cash Used in Investing Activities-discontinued operations		(3.1)
Cash Provided by (Used in) Investing Activities	48.9	(15.5)
Financing Activities
Long-term debt (retired) incurred	(143.1)	77.2
Common stock repurchases		(5.7)
Net proceeds from stock option activity	8.8	7.9
Dividends paid	(7.3)	(6.4)
Cash (Used in) Provided by Financing Activities-continuing operations	(141.6)	73.0
Cash Provided by Financing Activities-discontinued operations
Cash (Used in) Provided by Financing Activities	(141.6)	73.0
Net (decrease) increase in cash and cash equivalents	(96.2)	5.3
Cash and cash equivalents-beginning of period	463.4	118.9
Cash and Cash Equivalents-End of Period	$ 367.2	$ 124.2

Basis Of Presentation

3 Months Ended

Mar. 31, 2012

Basis Of Presentation [Abstract]

Basis Of Presentation

1.	Basis of Presentation

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (GAAP) for interim financial information and pursuant to the rules and regulations of the Securities and Exchange Commission (SEC). Accordingly, they do not include all of the information and footnotes required for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. Operating results for the three month period ended March 31, 2012 are not necessarily indicative of the results expected for the full year. It is suggested that the accompanying condensed consolidated financial statements be read in conjunction with the audited consolidated financial statements and the notes thereto included in the company's latest Annual Report on Form 10-K filed with the SEC on February 27, 2012.

Except where otherwise indicated, amounts reflected in the financial statements or the notes thereto relate to the company's continuing operations.

Certain other prior year amounts have been reclassified to conform to the 2012 presentation.

Recent Accounting Pronouncements

In June 2011, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2011-05, "Comprehensive Income (Topic 220): Presentation of Comprehensive Income." ASU No. 2011-05 eliminates the option to present components of other comprehensive income as part of the statement of shareholders' equity. ASU 2011-05 will be effective for the quarter ending March 31, 2012. The adoption of this guidance will have no impact on our financial condition or results of operations but does impact the presentation of our financial statements. The company has presented the Statements of Comprehensive Earnings for all periods presented.

In September 2011, the FASB issued ASU No. 2011-08, "Testing of Goodwill for Impairment (Topic 350)". ASU No. 2011-08 allows companies to assess qualitative factors to determine whether the two-step quantitative goodwill impairment test needs to be performed. Under the option, an entity no longer would be required to calculate the fair value of a reporting unit unless it determines, based on that qualitative assessment, that it is more likely than not that its fair value is less than its carrying amount. The ASU may change how a company tests goodwill for impairment but should not change the timing or measurement of goodwill impairments. ASU 2011-08 will be effective for the year ending December 31, 2012. The company is currently reviewing the standard for applicability.

- Definition

The entire disclosure for organization, consolidation and basis of presentation of financial statements disclosure.

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-Name Accounting Standards Codification
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Reference 16: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS140-4/FIN46(R)-8
-Paragraph 8, C1, C7
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Acquisition

3 Months Ended

Mar. 31, 2012

Acquisition [Abstract]

Acquisition

2.	Acquisition

On August 26, 2011, the company acquired 100 percent of the shares of Lochinvar Corporation (Lochinvar), a privately held manufacturer of high-efficiency boilers used in commercial and residential applications located in Lebanon, Tennessee. The addition of Lochinvar expands the company's product offerings and gives the company access to proven high-efficiency boiler technology. Lochinvar is included in the North America segment.

The company paid an aggregate cash purchase price, net of $1.5 million of cash acquired, of $421.1 million. In addition, the company incurred acquisition costs of approximately $5.5 million. Under the purchase agreement for the Lochinvar acquisition, the company agreed to make a contingent payment of up to an additional $35.0 million in cash based on the amount by which Lochinvar sales between December 1, 2011 and November 30, 2012 exceed $216.0 million. As of the acquisition date and March 31, 2012, the fair value of the contingent payment has been estimated at $16.8 million.

The following table summarizes the allocation of fair value of the assets acquired and liabilities assumed at the date of acquisition. Of the $258.3 million of acquired intangible assets, $103.5 million has been assigned to trade names that are not subject to amortization and $152.5 million has been assigned to customer lists which are being amortized over 19 years, and the remaining $2.3 million has been assigned to non-compete agreements and patents which are being amortized over ten years.


August 26, 2011 (dollars in millions)
Current assets, net of cash acquired	$	54.0
Property, plant and equipment		41.9
Intangible assets		258.3
Other assets		0.1
Goodwill		111.4

Total assets acquired		465.7
Current liabilities		24.3
Long-term liabilities		3.5

Total liabilities assumed		27.8

Net assets acquired	$	437.9

For income tax purposes, the transaction has been accounted for as an asset purchase, resulting in the full amount of goodwill and intangible assets, totaling $369.7 million, being deductible for income tax purposes.

Lochinvar's results of operations have been included in the company's financial statements from August 26, 2011, the date of acquisition. Revenues and pretax earnings associated with Lochinvar included in operations in the quarter ended March 31, 2012 totaled $49.3 million and $9.9 million, respectively.

The following table represents the pro forma unaudited results of operations for the company for the quarter ended March 31, 2011 assuming consummation of the purchase of Lochinvar as of January 1, 2011 (dollars in millions except per share data):


	Three Months Ended March 31, 2011
Net sales		$	459.8
Earnings from continuing operations			28.7
Earnings per common share:
Basic		$	0.62

Diluted		$	0.62

The pro forma results have been prepared for informational purposes only and include adjustments to depreciation expense of acquired plant and equipment, amortization of intangible assets other than goodwill and trade names, increased interest expense on acquisition related debt, and certain other adjustments, together with related income tax effects of such adjustments. These pro forma results do not purport to be indicative of the results of operations that would have occurred had the purchases been made as of the beginning of the period presented or of the results of operations that may occur in the future.

- Definition

The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 88-16
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141
-Paragraph 51, 52
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
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-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Appendix F
-Paragraph F4
-Subparagraph e

Reference 4: http://www.xbrl.org/2003/role/presentationRef
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-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 67-73
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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+ Details

Discontinued Operations

3 Months Ended

Mar. 31, 2012

Discontinued Operations [Abstract]

Discontinued Operations

3.	Discontinued Operations

On August 22, 2011, the company completed the sale of its Electrical Products Company (EPC) to Regal Beloit Corporation (RBC) for $759.9 million in cash and approximately 2.83 million of RBC shares. Included in the $759.9 million of cash was a final working capital adjustment of $7.4 million which was paid to the company by RBC in January 2012. The value of the RBC shares on the date of the closing of the sale was $140.6 million. See Note 14 for further discussion regarding the company's investment in RBC stock. The company paid $24.6 million in income taxes and $2.3 million of other sale related expenses in the first quarter of 2012 and estimates it will pay an additional $10.6 million of income taxes in 2012.

As a part of the sale of EPC, the company recorded an additional income tax accrual of $56.5 million due to the company's assertion that certain foreign earnings derived from the sale of EPC were not considered permanently reinvested by the company. The accrual is included in other long term liabilities in continuing operations.

The results of EPC have been reported separately as discontinued operations for all periods presented.

The condensed statement of earnings of the EPC discontinued operations is:


Three Months Ended March 31 (dollar in millions)
	2011
Net sales	$	200.4
Cost of products sold		155.2

Gross Profit		45.2
Selling, general and administrative expenses		22.0
Interest expense		0.8
Other income		(0.1	)

		22.5
Provision for income taxes		5.7


Net earnings	$	16.8

The cash flow provided by EPC discontinued operations is as follows:

Three months ended March 31 (dollars in millions)


	2011
Operating Activities
Earnings	$	16.8
Adjustments to reconcile earnings to net cash provided by discontinued operating activities:
Depreciation and amortization		6.5
Loss on sale of assets		-
Net changes in operating assets and liabilities
Current assets and liabilities		(23.5	)
Noncurrent assets and liabilities		1.4
Other		(1.1	)

Cash Provided by (Used in) Discontinued Operating Activities		0.1
Investing Activities
Capital expenditures		(3.1	)

Cash Used in Discontinued Investing Activities		(3.1	)

Cash Flow Used in Discontinued Operations	$	(3.0	)

- Definition

The entire disclosure for the facts and circumstances leading to the completed or expected disposal, manner and timing of disposal, the gain (loss) recognized in the income statement and the income statement caption that includes that gain (loss), amounts of revenues and pretax profit or loss reported in discontinued operations, the segment in which the disposal group was reported, and the classification (whether sold or classified as held for sale) and carrying value of the assets and liabilities comprising the disposal group. Includes all disposal groups, including those classified as components of the entity (discontinued operations).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 144
-Paragraph 43-48
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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+ Details

Inventories

3 Months Ended

Mar. 31, 2012

Inventories [Abstract]

Inventories

4.	Inventories


	(dollars in millions)
	March 31, 2012			December 31, 2011
Finished products	$	88.7		$	85.6
Work in process		11.6			10.6
Raw materials		97.0			98.9

		197.3			195.1
LIFO reserve		(25.1	)		(26.7	)

	$	172.2		$	168.4

Long-Term Debt

3 Months Ended

Mar. 31, 2012

Long-Term Debt [Abstract]

Long-Term Debt

5.	Long-Term Debt

The company has a $425 million multi-currency revolving credit agreement with eight banks. The facility expires on November 13, 2013 and has an accordion provision which allows it to be increased up to $525 million if certain conditions (including lender approval) are satisfied. Interest rates on borrowings under the facility are determined in part based upon the company's leverage ratio.

Borrowings under bank credit lines and commercial paper borrowings are supported by the $425 million revolving credit agreement. As a result of the long-term nature of this facility, the commercial paper and credit line borrowings are classified as long-term debt at March 31, 2012.

Product Warranties

3 Months Ended

Mar. 31, 2012

Product Warranties [Abstract]

Product Warranties

6.	Product Warranties (dollars in millions)

The company offers warranties on the sales of certain of its products and records an accrual for the estimated future claims. The following table presents the company's warranty liability activity.


	Three Months Ended March 31
	2012			2011
Balance at January 1	$	131.9		$	112.1
Expense		15.4			18.2
Claims settled		(15.3	)		(14.0	)

Balance at March 31	$	132.0		$	116.3

The company recorded a receivable of approximately $14.6 million at March 31, 2011 relating to certain costs it expected to recover from a vendor under an arrangement which existed prior to entering into litigation with the vendor in Tennessee State Court. The company settled with the vendor and the vendor's supplier in the second quarter of 2011 and received a cash payment of $35.5 million.

Earnings Per Share Of Common Stock

3 Months Ended

Mar. 31, 2012

Earnings Per Share Of Common Stock [Abstract]

Earnings Per Share Of Common Stock

7.	Earnings per Share of Common Stock

The numerator for the calculation of basic and diluted earnings per share is net earnings. The following table sets forth the computation of basic and diluted weighted-average shares used in the earnings per share calculations:


	Three Months Ended March 31
	2012		2011
Denominator for basic earnings per share - weighted average shares		46,103,193		46,000,013
Effect of dilutive stock options		385,143		540,458

Denominator for diluted earnings per share		46,488,336		46,540,471

Stock Based Compensation

3 Months Ended

Mar. 31, 2012

Stock Based Compensation [Abstract]

Stock Based Compensation

8.	Stock Based Compensation

The company adopted the A. O. Smith Combined Incentive Compensation Plan (the "plan") effective January 1, 2007. The plan is a continuation of the A. O. Smith Combined Executive Incentive Compensation Plan which was originally approved by stockholders in 2002. At the company's annual meeting of stockholders on April 16, 2012 the plan was reauthorized by stockholders and the number of shares available for granting of options or share units at March 31, 2012 was 1,644,334. Upon stock option exercise or share unit vesting, shares are issued from treasury stock.

Total stock based compensation cost recognized in the three month periods ended March 31, 2012 and 2011 was $2.4 million and $2.4 million, respectively.

Stock Options

The stock options granted in the three month periods ended March 31, 2012 and 2011, have three year pro-rata vesting from the date of grant. Stock options are issued at exercise prices equal to the fair value of Common Stock on the date of grant. For active employees, all options granted in 2012 and 2011 expire ten years after date of grant. Options are expensed ratably over the three year vesting period. Stock based compensation cost attributable to stock options in the three month periods ended March 31, 2012 and 2011 was $1.1 million and $1.2 million, respectively. Included in the stock option expense for the three month periods ended March 31, 2012 and 2011 is expense associated with the accelerated vesting of stock option awards for certain employees who either are retirement eligible or become retirement eligible during the vesting period.

Changes in option awards, all of which relate to Common Stock, were as follows for the three months ended March 31, 2012:


	Weighted-Avg. Per Share Exercise Price		Three Months Ended March 31, 2012			Average Remaining Contractual Life	Aggregate Intrinsic Value (dollars in millions)

Outstanding at January 1, 2012	$	24.84		1,421,867

Granted		45.97		190,600

Exercised		23.64		(315,450	)


Outstanding at March 31, 2012		28.23		1,297,017		7 years	$	21.9


Exercisable at March 31, 2012	$	22.90		929,373		7 years	$	20.5

The weighted-average fair value per option at the date of grant during the three months ended March 31, 2012 and 2011 using the Black-Scholes option-pricing model was $16.52 and $16.50, respectively. Assumptions were as follows:


	Three Months Ended March 31,
	2012			2011
Expected life (years)		6.2			6.4
Risk-free interest rate		2.0	%		3.6	%
Dividend yield		1.4	%		1.3	%
Expected volatility		39.4	%		38.4	%

The expected life is based on historical exercise behavior and the projected exercise of unexercised stock options. The risk free interest rate is based on the U.S. Treasury yield curve in effect on the date of grant for the expected life of the option. The expected dividend yield is based on the expected annual dividends divided by the grant date market value of our common stock. The expected volatility is based on the historical volatility of our common stock.

Restricted Stock and Share Units

Participants may also be awarded shares of restricted stock or share units under the plan. The company granted 83,800 and 75,625 share units under the plan in the three month periods ended March 31, 2012 and 2011, respectively. The share units were valued at $3.9 million and $3.3 million at the date of issuance in 2012 and 2011, respectively, based on the company's stock price at the date of grant and will be recognized as compensation expense ratably over the three-year vesting period. Share based compensation expense attributable to share units of $1.3 million and $1.2 million was recognized in the three month periods ended March 31, 2012 and 2011, respectively. Share based compensation expense recognized in the three month periods ended March 31, 2012 and 2011 included expense associated with accelerated vesting of share unit awards for certain employees who either are retirement eligible or will become retirement eligible during the vesting period.

A summary of share unit activity under the plan is as follows:


	Number of Units			Weighted-Average Grant Date Value
Issued and unvested at January 1, 2012		286,554		$	27.36

Granted		83,800			45.97

Vested		(132,974	)		18.80


Issued and unvested at March 31, 2012		237,380		$	38.72

- Definition

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph 64, 65, A240
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Statement of Position (SOP)
-Number 93-6
-Paragraph 53
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 14

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Topic 718
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-URI http://asc.fasb.org/extlink&oid=6418621&loc=d3e17540-113929

+ Details

Pensions

3 Months Ended

Mar. 31, 2012

Pensions [Abstract]

Pensions

9.	Pensions (dollars in millions)

The following table presents the components of the company's net pension expense.


	Three Months Ended March 31
	2012			2011
Service cost	$	2.0		$	2.4
Interest cost		10.8			11.2
Expected return on plan assets		(17.2	)		(17.5	)
Amortization of unrecognized loss		8.0			5.7
Amortization of prior service cost		(0.2	)		(0.2	)

Defined benefit plan expense	$	3.4		$	1.6

The company made contributions totaling $45 million in the three months ended March 31, 2011 and does not anticipate making a contribution in 2012. Included in the table above is $0.5 million of defined benefit plan expense associated with the company's discontinued operations for the three months ended March 31, 2011.

- Definition

The entire disclosure for pension and other postretirement benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph a
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph h
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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph q
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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 8
-Subparagraph m
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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 106
-Paragraph 518
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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 264
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-Name Emerging Issues Task Force (EITF)
-Number 03-2
-Paragraph 8
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-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 30
-Paragraph 26
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-Name FASB Staff Position (FSP)
-Number FAS106-2
-Paragraph 20, 21, 22
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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 158
-Paragraph 7, 21, 22
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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5, 6, 7, 8
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-Publisher FASB
-Name Implementation Guide (Q and A)
-Number FAS88
-Paragraph 63
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-URI http://asc.fasb.org/topic&trid=2235017

+ Details

Operations By Segment

3 Months Ended

Mar. 31, 2012

Operations By Segment [Abstract]

Operations By Segment

10.

Operations by Segment

Prior to the sale of EPC the company had identified two segments, Water Products Company and EPC. As a result of the sale of EPC and a change in management reporting, the company reconsidered its segment reporting in the fourth quarter of 2011 and determined that it is comprised of two reporting segments: North America and Rest of World. Both segments manufacture and market comprehensive lines of residential gas, gas tankless, oil and electric water heaters and commercial water heating equipment. Both segments primarily serve their respective regions of the world. The North America segment also manufactures and markets specialty commercial water heating equipment, condensing and non-condensing boilers and water system tanks. The Rest of World segment also manufactures and markets water treatment products, primarily in Asia.


(dollars in millions)
	Three Months Ended March 31
	2012			2011
Net sales
North America	$	353.3		$	321.7
Rest of World		124.2			105.2
Inter-segment sales		(8.9	)		(9.5	)

	$	468.6		$	417.4

Operating earnings
North America	$	42.2		$	38.1
Rest of World		14.2			10.8

		56.4			48.9
Corporate income (expense)⁽¹⁾		16.5			(13.4	)
Interest expense		(3.0	)		(1.8	)

Earnings before income taxes		69.9			33.7
Provision for income taxes		22.4			9.5

Earnings from continuing operations	$	47.5		$	24.2

⁽¹⁾ Includes net gain (loss) on investments	$	27.2		$	(1.6	)

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8981-108599

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
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-Paragraph 32
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8933-108599

+ Details

Fair Value Measurements

3 Months Ended

Mar. 31, 2012

Fair Value Measurements [Abstract]

Fair Value Measurements

11.

Fair Value Measurements

The company adopted Accounting Standards Codification (ASC) 820 Fair Value Measurements and Disclosures (formerly Statement of Financial Accounting Standards (SFAS) 157) on January 1, 2008. ASC 820, among other things, defines fair value, establishes a consistent framework for measuring fair value and expands disclosure for each major asset and liability category measured at fair value on either a recurring basis or nonrecurring basis. ASC 820 clarifies that fair value is an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or liability. As a basis for considering such assumptions, ASC 820 establishes a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value as follows: (Level 1) observable inputs such as quoted prices in active markets; (Level 2) inputs, other than the quoted prices in active markets, that are observable either directly or indirectly; and (Level 3) unobservable inputs in which there is little or no market data, which require the reporting entity to develop its own assumptions.

Continuing assets and liabilities measured at fair value are based on the market approach which are prices and other relevant information generated by market transactions involving identical or comparable assets or liabilities.

Assets measured at fair value on a recurring basis are as follows (dollars in millions):


Fair Value Measurement Using	March 31, 2012		December 31, 2011
Quoted prices in active markets for identical assets (Level 1)	$	61.5	$	144.2
Significant other observable inputs (Level 2)		-		17.8

Total assets measured at fair value	$	61.5	$	162.0

There were no changes in our valuation techniques used to measure fair values on a recurring basis as a result of adopting ASC 820.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44A, 44B
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 15C, 15D
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 15A
-Subparagraph a-d
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 15B
-Subparagraph a, b
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 3, 10, 14, 15
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 157
-Paragraph 32, 33, 34
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 159
-Paragraph 17-22, 27, 28
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Reference 8: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19207-110258

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+ Details

Derivative Instruments

3 Months Ended

Mar. 31, 2012

Derivative Instruments [Abstract]

Derivative Instruments

12.

Derivative Instruments

ASC 815 Derivatives and Hedging (formerly SFAS No. 133), as amended, requires that all derivative instruments be recorded on the balance sheet at fair value and establishes criteria for designation and effectiveness of the hedging relationships. The accounting for changes in the fair value of a derivative instrument depends on whether it has been designated and qualifies as a part of a hedging relationship and further, on the type of hedging relationship. For those

derivative instruments that are designated and qualify as hedging instruments, the company must designate the hedging instrument, based upon the exposure hedged, as a fair value hedge, cash flow hedge, or a hedge of a net investment in a foreign operation.

The company designates that all of its hedging instruments, except for its equity collar contract relating to RBC shares, are cash flow hedges. For derivative instruments that are designated and qualify as a cash flow hedge (i.e., hedging the exposure to variability in expected future cash flows that is attributable to a particular risk), the effective portion of the gain or loss on the derivative instrument is reported as a component of other comprehensive income (OCI), net of tax, and is reclassified into earnings in the same line item associated with the forecasted transaction and in the same period or periods during which the hedged transaction affects earnings. The amount by which the cumulative change in the value of the hedge more than offsets the cumulative change in the value of the hedged item (i.e., the ineffective portion) is recorded in earnings, net of tax, in the period the ineffectiveness occurs.

The company utilizes certain derivative instruments to enhance its ability to manage currency as well as raw materials price risk and equity investment volatility. Derivative instruments are entered into for periods consistent with the related underlying exposures and do not constitute positions independent of those exposures. The company does not enter into contracts for speculative purposes. The contracts are executed with major financial institutions with no credit loss anticipated for failure of the counterparties to perform.

Foreign Currency Forward Contracts

The company is exposed to foreign currency exchange risk as a result of transactions in currencies other than the functional currency of certain subsidiaries. The company utilizes foreign currency forward purchase and sale contracts to manage the volatility associated with foreign currency purchases, sales and certain intercompany transactions in the normal course of

business. Principal currencies include the Canadian dollar, Mexican peso, Chinese renminbi and Euro.

Gains and losses on these instruments are recorded in accumulated other comprehensive loss, net of tax, until the underlying transaction is recorded in earnings. When the hedged item is realized, gains or losses are reclassified from accumulated other comprehensive loss to the statement of earnings. The assessment of effectiveness for forward contracts is based on changes in the forward rates. These hedges have been determined to be effective.

The majority of the amounts in accumulated other comprehensive loss for cash flow hedges is expected to be reclassified into earnings within one year and all of the hedges will be reclassified into earnings no later than December 31, 2013. Contracts related to the company's discontinued operations that expired after the closing date no longer qualified for hedge accounting; therefore, the change in valuation during the three months ended March 31, 2011 of $2.3 million was recorded in earnings from discontinued operations.

The following table summarizes, by currency, the contractual amounts of the company's foreign currency forward contracts for continuing operations.


March 31 (dollars in millions)		2012					2011
	Buy			Sell			Buy		Sell
Euro		$	12.2		$	0.9	$	2.8		$	1.7
Canadian dollar			-			27.4		-			41.9
Mexican peso			13.9			-		8.8			-
Chinese renminibi			5.7			-		-			-

Total		$	31.8		$	28.3	$	11.6		$	43.6

Commodity Futures Contracts

In addition to entering into supply arrangements in the normal course of business, the company, primarily for its discontinued operation prior to its disposition, also entered into futures contracts to fix the cost of certain raw material purchases, principally copper and aluminum, with the objective of minimizing changes in cost due to market price fluctuations. The hedging strategy for achieving this objective is to purchase commodities futures contracts on the open market of the London Metals Exchange (LME) or over the counter contracts based on the LME.

The minimal after-tax loss of the effective portion of the contracts as of March 31, 2012 was recorded in accumulated other comprehensive loss, and will be reclassified into cost of products sold in the period in which the underlying transaction is recorded in earnings. The effective portion of the contracts will be reclassified within one year. Contracts related to the company's discontinued operations that expired after the closing date no longer qualified for hedge accounting; therefore, the change in valuation during the three months ended March 31, 2011 of $(0.6) million was recorded in earnings from discontinued operations. Commodity hedges outstanding at March 31, 2012 involve a total of approximately 0.3 million pounds of copper.

Equity Collar Contract

As discussed in Note 3, on August 22, 2011, the company sold EPC to RBC and received approximately 2.83 million RBC shares. The RBC share price appreciated in the first quarter of 2011 during which the company entered into an equity collar contract for 50 percent of the RBC shares to protect a portion of that appreciation. The put strike price of the equity collar was $63.29 and the call strike price of the collar was $77.32. The collar did not qualify for hedge accounting and therefore was adjusted to fair value on a quarterly basis through earnings from continuing operations. The mark to market accounting for the RBC shares and hedge continued until the equity collar contract expired in March of 2012 with no value.

The impact of derivative contracts on the company's financial statements is as follows (dollars in millions):

Fair value of derivatives designated as hedging instruments under ASC 815 in continuing operations:


		Fair Value
(dollars in millions)	Balance Sheet Location	March 31, 2012			December 31, 2011

Commodities contracts	Accrued liabilities	$	-		$	(0.1	)
Foreign currency contracts	Accrued liabilities		(0.2	)		(1.6	)
	Other current assets		0.8			1.3

Total derivatives designated as hedging instruments		$	0.6		$	(0.4	)

Fair value of derivative not designated as a hedging instrument under ASC 815 in continuing operations:


		Fair Value
(dollars in millions)	Balance Sheet Location	March 31, 2012		December 31, 2011

Equity collar contract	Investments	$	-	$	17.9

Total derivatives not designated as hedging instruments		$	-	$	17.9

The effect of derivatives designated as hedging instruments under ASC 815 on the Statement of Earnings for continuing and discontinued operations:

Year to date March 31:


Derivatives in ASC 815 cash flow hedging relationships	Amount of gain/(loss) recognized in OCI on derivative (effective portion)					Location of gain/(loss) reclassified from Accumulated OCI into earnings (effective portion)	Amount of gain/(loss) reclassified from Accumulated OCI into earnings (effective portion)					Location of gain/(loss) recognized in earnings on derivative (ineffective portion)	Amount of gain/(loss) recognized in earnings on a derivative (ineffective portion)
	2012		2011				2012			2011			2012		2011
Commodities contracts	$	0.1	$	(0.1	)	Cost of products sold	$	-		$	0.3	Cost of products sold	$	-	$	-
						Discontinued operations		-			3.5	Discontinued operations		-		-
Foreign currency contracts		0.6		0.5		Cost of products sold		(0.3	)		-	N/A		-		-
		-		-		Discontinued operations		-			1.9	Discontinued operations		-		-

	$	0.7	$	0.4			$	(0.3	)	$	5.7		$	-	$	-


Derivatives not designated as a hedging instrument under ASC 815	Location of loss recognized in earnings from continuing operations on derivative		Amount of loss recognized in earnings from continuing operations on derivative
				2012		2011
Equity collar contract		Other expense -net	$	17.9	$	1.6

- Definition

The entire disclosure for the entity's entire derivative instruments and hedging activities. Describes an entity's risk management strategies, derivatives in hedging activities and non-hedging derivative instruments, the assets, obligations, liabilities, revenues and expenses arising therefrom, and the amounts of and methodologies and assumptions used in determining the amounts of such items.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 45
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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+ Details

Income Taxes

3 Months Ended

Mar. 31, 2012

Income Taxes [Abstract]

Income Taxes

13.

Income Taxes

The effective tax rate for the three months ended March 31, 2012 was 32.0 percent compared to 28.2 percent for the first three months of 2011. The company estimates that the tax rate for the full year of 2012 will be 30.0 percent excluding the tax on the gain on sale of the RBC shares disposed of in the first quarter which was taxed at a higher rate. The full year effective tax rate in 2011 was 31.1 percent.

As of March 31, 2012, the company had $1.8 million of unrecognized tax benefits from continuing operations of which $1.3 million would affect its effective tax rate if recognized. The company recognizes potential interest and penalties related to unrecognized tax benefits as a component of tax expense.

The company's U.S. federal tax returns for 2008-2011 are subject to audit. The company is subject to state and local audits for tax years 2000-2011. The company is also subject to non-U.S. income tax examinations for years 2005-2011.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Paragraph h
-Article 4

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 136, 172
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
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-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 43, 44, 45, 46, 47, 48, 49
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-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(h))
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+ Details

Investment In RBC Shares

3 Months Ended

Mar. 31, 2012

Investment In RBC Shares [Abstract]

Investment In RBC Shares

14.

Investment in RBC Shares

As discussed in Note 3, the company received approximately 2.83 million of RBC shares as a part of the proceeds of its sale of EPC to RBC. The value of those shares at December 31, 2011 was $144.4 million. One half of the RBC shares were classified as available for sale securities and were recorded at fair value with an unrealized after-tax gain of $1.2 million included in other comprehensive loss as of December 31, 2011. The company entered into an equity collar contract for the remaining half of the RBC shares that were classified as trading securities. Those shares were also recorded at fair value. See Note 12 for further discussion regarding the collar. During the first quarter of 2012, the company sold all of its RBC shares for net proceeds of $187.6 million or an average price of $66.19 per share. A pre-tax gain of $27.2 million was recorded in other (income) expense–net in the condensed consolidated statement of earnings. The $27.2 million is comprised of a $43.2 million gain on the sale of the RBC shares, the recognition of a $1.9 million gain recognized in other comprehensive earnings at December 31, 2011 as partially offset by the write off of $17.9 million, the value of the collar at December 31, 2011. The proceeds received during the first quarter of 2012 of $122.9 million were used to pay down debt. The remaining proceeds of $64.7 million were recorded as a receivable as of March 31, 2012.

- Definition

Tabular disclosure of investments in certain debt and equity securities (and certain other trading assets) which include all debt and equity securities (other than those equity securities accounted for under the equity or cost methods of accounting) with readily determinable fair values. Other trading assets include assets that are carried on the balance sheet at fair value and held for trading purposes. A debt security represents a creditor relationship with an enterprise that is in the form of a security. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities (and other trading assets).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 3, 19, 20, 21, 22, 137
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-Publisher FASB
-Name Accounting Standards Codification
-Glossary Debt Security
-URI http://asc.fasb.org/extlink&oid=6509901
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-Topic 320

+ Details

Acquisition (Tables)

3 Months Ended

Mar. 31, 2012

Acquisition [Abstract]

Summary Of Preliminary Estimate Of Fair Value Of The Assets Acquired And Liabilities Assumed


August 26, 2011 (dollars in millions)
Current assets, net of cash acquired	$	54.0
Property, plant and equipment		41.9
Intangible assets		258.3
Other assets		0.1
Goodwill		111.4

Total assets acquired		465.7
Current liabilities		24.3
Long-term liabilities		3.5

Total liabilities assumed		27.8

Net assets acquired	$	437.9

Schedule Of Pro Forma Unaudited Results Of Operations


	Three Months Ended March 31, 2011
Net sales		$	459.8
Earnings from continuing operations			28.7
Earnings per common share:
Basic		$	0.62

Diluted		$	0.62

- Definition

Tabular disclosure of pro forma results of operations for a material business acquisition or series of individually immaterial business acquisitions that are material in the aggregate.

+ References + Details

Discontinued Operations (Tables)

3 Months Ended

Mar. 31, 2012

Discontinued Operations [Abstract]

Schedule Of Disposal Groups Including Discontinued Operations Income Statement


Three Months Ended March 31 (dollar in millions)
	2011
Net sales	$	200.4
Cost of products sold		155.2

Gross Profit		45.2
Selling, general and administrative expenses		22.0
Interest expense		0.8
Other income		(0.1	)

		22.5
Provision for income taxes		5.7


Net earnings	$	16.8

Schedule Of Disposal Groups Including Discontinued Operations Cash Flow Statement


	2011
Operating Activities
Earnings	$	16.8
Adjustments to reconcile earnings to net cash provided by discontinued operating activities:
Depreciation and amortization		6.5
Loss on sale of assets		-
Net changes in operating assets and liabilities
Current assets and liabilities		(23.5	)
Noncurrent assets and liabilities		1.4
Other		(1.1	)

Cash Provided by (Used in) Discontinued Operating Activities		0.1
Investing Activities
Capital expenditures		(3.1	)

Cash Used in Discontinued Investing Activities		(3.1	)

Cash Flow Used in Discontinued Operations	$	(3.0	)

Inventories (Tables)

3 Months Ended

Mar. 31, 2012

Inventories [Abstract]

Schedule Of Inventories


	(dollars in millions)
	March 31, 2012			December 31, 2011
Finished products	$	88.7		$	85.6
Work in process		11.6			10.6
Raw materials		97.0			98.9

		197.3			195.1
LIFO reserve		(25.1	)		(26.7	)

	$	172.2		$	168.4

Product Warranties (Tables)

3 Months Ended

Mar. 31, 2012

Product Warranties [Abstract]

Schedule Of Product Warranty Liability Activity


	Three Months Ended March 31
	2012			2011
Balance at January 1	$	131.9		$	112.1
Expense		15.4			18.2
Claims settled		(15.3	)		(14.0	)

Balance at March 31	$	132.0		$	116.3

Earnings Per Share Of Common Stock (Tables)

3 Months Ended

Mar. 31, 2012

Earnings Per Share Of Common Stock [Abstract]

Schedule Of Computation Of Basic And Diluted Weighted-Average Shares Used In Earnings Per Share Calculations


	Three Months Ended March 31
	2012		2011
Denominator for basic earnings per share - weighted average shares		46,103,193		46,000,013
Effect of dilutive stock options		385,143		540,458

Denominator for diluted earnings per share		46,488,336		46,540,471

Stock Based Compensation (Tables)

3 Months Ended

Mar. 31, 2012

Stock Based Compensation [Abstract]

Schedule Of Changes In Option Shares


	Weighted-Avg. Per Share Exercise Price		Three Months Ended March 31, 2012			Average Remaining Contractual Life	Aggregate Intrinsic Value (dollars in millions)

Outstanding at January 1, 2012	$	24.84		1,421,867

Granted		45.97		190,600

Exercised		23.64		(315,450	)


Outstanding at March 31, 2012		28.23		1,297,017		7 years	$	21.9


Exercisable at March 31, 2012	$	22.90		929,373		7 years	$	20.5

Schedule Of Weighted-Average Fair Value Per Option At The Date Of Grant


	Three Months Ended March 31,
	2012			2011
Expected life (years)		6.2			6.4
Risk-free interest rate		2.0	%		3.6	%
Dividend yield		1.4	%		1.3	%
Expected volatility		39.4	%		38.4	%

Schedule Of Share Unit Activity Under The Plan


	Number of Units			Weighted-Average Grant Date Value
Issued and unvested at January 1, 2012		286,554		$	27.36

Granted		83,800			45.97

Vested		(132,974	)		18.80


Issued and unvested at March 31, 2012		237,380		$	38.72

Pensions (Tables)

3 Months Ended

Mar. 31, 2012

Pensions [Abstract]

Schedule Of Components Of Net Pension Expense


	Three Months Ended March 31
	2012			2011
Service cost	$	2.0		$	2.4
Interest cost		10.8			11.2
Expected return on plan assets		(17.2	)		(17.5	)
Amortization of unrecognized loss		8.0			5.7
Amortization of prior service cost		(0.2	)		(0.2	)

Defined benefit plan expense	$	3.4		$	1.6

Operations By Segment (Tables)

3 Months Ended

Mar. 31, 2012

Operations By Segment [Abstract]

Schedule Of Operating Earnings


(dollars in millions)
	Three Months Ended March 31
	2012			2011
Net sales
North America	$	353.3		$	321.7
Rest of World		124.2			105.2
Inter-segment sales		(8.9	)		(9.5	)

	$	468.6		$	417.4

Operating earnings
North America	$	42.2		$	38.1
Rest of World		14.2			10.8

		56.4			48.9
Corporate income (expense)⁽¹⁾		16.5			(13.4	)
Interest expense		(3.0	)		(1.8	)

Earnings before income taxes		69.9			33.7
Provision for income taxes		22.4			9.5

Earnings from continuing operations	$	47.5		$	24.2

⁽¹⁾ Includes net gain (loss) on investments	$	27.2		$	(1.6	)

Fair Value Measurements (Tables)	3 Months Ended
Fair Value Measurements (Tables)	Mar. 31, 2012
Fair Value Measurements [Abstract]
Schedule Of Assets Measured At Fair Value On A Recurring Basis	<table style="border-collapse: collapse;" border="0" cellspacing="0" cellpadding="0" width="92%" align="center"> <tr><td width="67%"> </td> <td valign="bottom" width="13%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="13%"> </td> <td> </td> <td> </td> <td> </td></tr> <tr><td style="border-bottom: #000000 1px solid;" valign="bottom" nowrap="nowrap"><font style="font-family: Times New Roman;" class="_mt" size="2">Fair Value Measurement Using</font></td> <td style="border-bottom: #000000 1px solid;" valign="bottom"><font class="_mt" size="1"> </font></td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center"><font style="font-family: Times New Roman;" class="_mt" size="2">March 31, 2012</font></td> <td style="border-bottom: #000000 1px solid;" valign="bottom"><font class="_mt" size="1"> </font></td> <td style="border-bottom: #000000 1px solid;" valign="bottom"><font class="_mt" size="1"> </font></td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center"><font style="font-family: Times New Roman;" class="_mt" size="2">December 31, 2011</font></td> <td style="border-bottom: #000000 1px solid;" valign="bottom"><font class="_mt" size="1"> </font></td></tr> <tr bgcolor="#cceeff"><td valign="top"> <p style="text-indent: -1em; margin-left: 1em;"><font style="font-family: Times New Roman;" class="_mt" size="2">Quoted prices in active markets for identical assets (Level 1)</font></p></td> <td valign="bottom"><font class="_mt" size="1"> </font></td> <td valign="bottom"><font style="font-family: Times New Roman;" class="_mt" size="2">$</font></td> <td valign="bottom" align="right"><font style="font-family: Times New Roman;" class="_mt" size="2">61.5</font></td> <td valign="bottom" nowrap="nowrap"><font style="font-family: Times New Roman;" class="_mt" size="2"> </font></td> <td valign="bottom"><font class="_mt" size="1"> </font></td> <td valign="bottom"><font style="font-family: Times New Roman;" class="_mt" size="2">$</font></td> <td valign="bottom" align="right"><font style="font-family: Times New Roman;" class="_mt" size="2">144.2</font></td> <td valign="bottom" nowrap="nowrap"><font style="font-family: Times New Roman;" class="_mt" size="2"> </font></td></tr> <tr><td valign="top"> <p style="text-indent: -1em; margin-left: 1em;"><font style="font-family: Times New Roman;" class="_mt" size="2">Significant other observable inputs (Level 2)</font></p></td> <td valign="bottom"><font class="_mt" size="1"> </font></td> <td valign="bottom"><font style="font-family: Times New Roman;" class="_mt" size="2"> </font></td> <td valign="bottom" align="right"><font style="font-family: Times New Roman;" class="_mt" size="2">-</font></td> <td valign="bottom" nowrap="nowrap"><font style="font-family: Times New Roman;" class="_mt" size="2"> </font></td> <td valign="bottom"><font class="_mt" size="1"> </font></td> <td valign="bottom"><font style="font-family: Times New Roman;" class="_mt" size="2"> </font></td> <td valign="bottom" align="right"><font style="font-family: Times New Roman;" class="_mt" size="2">17.8</font></td> <td valign="bottom" nowrap="nowrap"><font style="font-family: Times New Roman;" class="_mt" size="2"> </font></td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> <p style="border-top: #000000 1px solid;"> </p></td> <td valign="bottom"> <p style="border-top: #000000 1px solid;"> </p></td> <td> </td> <td valign="bottom"> </td> <td valign="bottom"> <p style="border-top: #000000 1px solid;"> </p></td> <td valign="bottom"> <p style="border-top: #000000 1px solid;"> </p></td> <td> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> <p style="text-indent: -1em; margin-left: 1em;"><font style="font-family: Times New Roman;" class="_mt" size="2">Total assets measured at fair value</font></p></td> <td valign="bottom"><font class="_mt" size="1"> </font></td> <td valign="bottom"><font style="font-family: Times New Roman;" class="_mt" size="2">$</font></td> <td valign="bottom" align="right"><font style="font-family: Times New Roman;" class="_mt" size="2">61.5</font></td> <td valign="bottom" nowrap="nowrap"><font style="font-family: Times New Roman;" class="_mt" size="2"> </font></td> <td valign="bottom"><font class="_mt" size="1"> </font></td> <td valign="bottom"><font style="font-family: Times New Roman;" class="_mt" size="2">$</font></td> <td valign="bottom" align="right"><font style="font-family: Times New Roman;" class="_mt" size="2">162.0</font></td> <td valign="bottom" nowrap="nowrap"><font style="font-family: Times New Roman;" class="_mt" size="2"> </font></td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> <p style="border-top: #000000 3px double;"> </p></td> <td valign="bottom"> <p style="border-top: #000000 3px double;"> </p></td> <td> </td> <td valign="bottom"> </td> <td valign="bottom"> <p style="border-top: #000000 3px double;"> </p></td> <td valign="bottom"> <p style="border-top: #000000 3px double;"> </p></td> <td> </td></tr></table>

- Definition

This element represents the disclosure related to assets and liabilities by class, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring and/or nonrecurring basis in periods after initial recognition (for example, impaired assets). The disclosures that may be required or desired include: (a) the fair value measurements recorded during the period and the reasons for the measurements and (b) the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets or liabilities (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). Where the quoted price in an active market for the identical liability is not available, the Level 1 input is the quoted price of an identical liability when traded as an asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 157
-Paragraph 32
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 157
-Paragraph 33
-Subparagraph a, b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 157
-Paragraph 6
-Footnote 4
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a),(b)
-URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19207-110258

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19190-110258

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (a),(b)
-URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19296-110258

+ Details

Derivative Instruments (Tables)

3 Months Ended

Mar. 31, 2012

Schedule Of Effect Of Derivative Instruments On The Statement Of Earnings


Derivatives in ASC 815 cash flow hedging relationships	Amount of gain/(loss) recognized in OCI on derivative (effective portion)					Location of gain/(loss) reclassified from Accumulated OCI into earnings (effective portion)	Amount of gain/(loss) reclassified from Accumulated OCI into earnings (effective portion)					Location of gain/(loss) recognized in earnings on derivative (ineffective portion)	Amount of gain/(loss) recognized in earnings on a derivative (ineffective portion)
	2012		2011				2012			2011			2012		2011
Commodities contracts	$	0.1	$	(0.1	)	Cost of products sold	$	-		$	0.3	Cost of products sold	$	-	$	-
						Discontinued operations		-			3.5	Discontinued operations		-		-
Foreign currency contracts		0.6		0.5		Cost of products sold		(0.3	)		-	N/A		-		-
		-		-		Discontinued operations		-			1.9	Discontinued operations		-		-

	$	0.7	$	0.4			$	(0.3	)	$	5.7		$	-	$	-


Derivatives not designated as a hedging instrument under ASC 815	Location of loss recognized in earnings from continuing operations on derivative		Amount of loss recognized in earnings from continuing operations on derivative
				2012		2011
Equity collar contract		Other expense -net	$	17.9	$	1.6

Designated As Hedging Instrument [Member]

Schedule Of Summary By Currency Of Foreign Currency Forward Contracts


March 31 (dollars in millions)		2012					2011
	Buy			Sell			Buy		Sell
Euro		$	12.2		$	0.9	$	2.8		$	1.7
Canadian dollar			-			27.4		-			41.9
Mexican peso			13.9			-		8.8			-
Chinese renminibi			5.7			-		-			-

Total		$	31.8		$	28.3	$	11.6		$	43.6

Schedule Of Impact Of Cash Flow Hedges On The Company's Financial Statements


		Fair Value
(dollars in millions)	Balance Sheet Location	March 31, 2012			December 31, 2011

Commodities contracts	Accrued liabilities	$	-		$	(0.1	)
Foreign currency contracts	Accrued liabilities		(0.2	)		(1.6	)
	Other current assets		0.8			1.3

Total derivatives designated as hedging instruments		$	0.6		$	(0.4	)

Not Designated As Hedging Instrument [Member]

Schedule Of Impact Of Cash Flow Hedges On The Company's Financial Statements


		Fair Value
(dollars in millions)	Balance Sheet Location	March 31, 2012		December 31, 2011

Equity collar contract	Investments	$	-	$	17.9

Total derivatives not designated as hedging instruments		$	-	$	17.9

- Definition

Tabular disclosure of the location and amount of gains and losses reported in the statement of financial performance, or when applicable, the statement of financial position. For example, (a) gains and losses recognized in the income statement on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges and (b) gains and losses initially recognized in other comprehensive income on derivative instruments designated and qualifying as cash flow hedges.

+ References + Details

Acquisition (Narrative) (Details) $ in Millions		3 Months Ended
Acquisition (Narrative) (Details) $ in Millions	Aug. 26, 2011 USD ($) yr	Mar. 31, 2012 USD ($)	Mar. 31, 2011 USD ($)
Business Acquisition [Line Items]
Acquired intangible assets	$ 258.3
Business acquisition purchase price allocation goodwill and intangible assets deductible for income tax purposes	$ 369.7
Revenues from acquisitions included in operations		$ 468.6	$ 417.4
Pretax earnings from acquisitions included in operations		69.9	$ 33.7
Lochinvar Corporation [Member]
Business Acquisition [Line Items]
Percentage of shares acquired	100.00%
Cash acquired from acquisition	$ 1.5
Aggregate cash purchase price, net of cash acquired	421.1
Acquisition costs incurred	5.5
Contingent payment	35.0
Volume of sales required to make additional contingent payment	216.0
Estimated fair value of the contingent payment	16.8	16.8
Acquired intangible assets	$ 258.3
Revenues from acquisitions included in operations		49.3
Pretax earnings from acquisitions included in operations		$ 9.9
Customer Lists [Member]
Business Acquisition [Line Items]
Acquired intangible assets, amortization period in years \| yr	19
Customer Lists [Member] \| Lochinvar Corporation [Member]
Business Acquisition [Line Items]
Acquired intangible assets subject to amortization	$ 152.5
Non-Compete Agreements And Patents [Member]
Business Acquisition [Line Items]
Acquired intangible assets, amortization period in years \| yr	10
Non-Compete Agreements And Patents [Member] \| Lochinvar Corporation [Member]
Business Acquisition [Line Items]
Acquired intangible assets subject to amortization	$ 2.3
Trade Names [Member] \| Lochinvar Corporation [Member]
Business Acquisition [Line Items]
Acquired intangible assets that are not subject to amortization	$ 103.5

Acquisition (Summary Of Preliminary Estimate Of Fair Value Of The Assets Acquired And Liabilities Assumed) (Details) $ in Millions	Aug. 26, 2011 USD ($)
Acquisition [Abstract]
Current assets, net of cash acquired	$ 54.0
Property, plant and equipment	41.9
Intangible assets	258.3
Other assets	0.1
Goodwill	111.4
Total assets acquired	465.7
Current liabilities	24.3
Long-term liabilities	3.5
Total liabilities assumed	27.8
Net assets acquired	$ 437.9

Acquisition (Schedule Of Pro Forma Unaudited Results Of Operations) (Details) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2011 USD ($) $ / shares
Acquisition [Abstract]
Net sales \| $	$ 459.8
Earnings from continuing operations \| $	$ 28.7
Earnings per common share, Basic \| $ / shares	$ 0.62
Earnings per common share, Diluted \| $ / shares	$ 0.62

- Definition

The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References + Details

- Definition

The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References + Details

Discontinued Operations (Narrative) (Details) - USD ($) shares in Thousands, $ in Millions		3 Months Ended
	Aug. 22, 2011	Mar. 31, 2012	Dec. 31, 2011
Proceeds from sale of business segment, shares		2,830
Value of shares from sale of business segment			$ 144.4
EPC [Member]
Proceeds from sale of business segment	$ 759.9
Proceeds from sale of business segment, shares	2,830
Working capital adjustment	$ 7.4
Value of shares from sale of business segment	$ 140.6
Income taxes paid		$ 24.6
Other sale related expenses		2.3
Income taxes payable		10.6
Additional income tax accrual		$ 56.5

Discontinued Operation (Schedule Of Disposal Groups Including Discontinued Operations Income Statement) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2011 USD ($)
Discontinued Operations [Abstract]
Net sales	$ 200.4
Cost of products sold	155.2
Gross Profit	45.2
Selling, general and administrative expenses	22.0
Interest expense	0.8
Other income	(0.1)
Earnings before income taxes	22.5
Provision for income taxes	5.7
Net earnings	$ 16.8

Discontinued Operations (Schedule Of Disposal Groups Including Discontinued Operations Cash Flow Statement) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Discontinued Operations [Abstract]
Earnings		$ 16.8
Depreciation and amortization		6.5
Loss on sale of assets
Current assets and liabilities		(23.5)
Noncurrent assets and liabilities		1.4
Other		(1.1)
Cash Provided by (Used in) Discontinued Operating Activities	$ (18.5)	0.1
Capital expenditures		(3.1)
Cash Used in Discontinued Investing Activities		(3.1)
Cash Flow Used in Discontinued Operations		$ (3.0)

Inventories (Schedule Of Inventories) (Details) - USD ($) $ in Millions	Mar. 31, 2012	Dec. 31, 2011
Inventories [Abstract]
Finished products	$ 88.7	$ 85.6
Work in process	11.6	10.6
Raw materials	97.0	98.9
Inventories, at FIFO cost	197.3	195.1
LIFO reserve	(25.1)	(26.7)
Inventories, Net	$ 172.2	$ 168.4

Long-Term Debt (Details) $ in Millions	3 Months Ended
Long-Term Debt (Details) $ in Millions	Mar. 31, 2012 USD ($)
Long-Term Debt [Abstract]
Multi-currency revolving credit agreement	$ 425
Number of banks involved in multi-year multi-currency revolving credit agreement	8
Revolving credit facility, expiration date	November 13, 2013
Multi-currency revolving credit agreement, maximum amount	$ 525

Product Warranties (Details) - USD ($) $ in Millions	3 Months Ended
Product Warranties (Details) - USD ($) $ in Millions	Mar. 31, 2012	Jun. 30, 2011	Mar. 31, 2011
Product Warranties [Abstract]
Balance at January 1	$ 131.9	$ 116.3	$ 112.1
Expense	15.4		18.2
Claims settled	(15.3)		(14.0)
Balance at March 31	$ 132.0		116.3
Product warranty receivable			$ 14.6
Proceeds from legal settlement		$ 35.5

Earnings Per Share Of Common Stock (Schedule Of Computation Of Basic And Diluted Weighted-Average Shares Used In Earnings Per Share Calculations) (Details) - shares	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Earnings Per Share Of Common Stock [Abstract]
Denominator for basic earnings per share-weighted average shares	46,103,193	46,000,013
Effect of dilutive stock options	385,143	540,458
Denominator for diluted earnings per share	46,488,336	46,540,471

- Definition

The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

+ References + Details

- Definition

Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 171
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 40
-Subparagraph a
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 8
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=6920599&loc=d3e1448-109256

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Weighted-Average Number of Common Shares Outstanding
-URI http://asc.fasb.org/extlink&oid=6528421

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 07-4
-Paragraph 4
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Stock Based Compensation (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Stock Based Compensation [Line Items]
Total stock based compensation cost recognized	$ 2.4	$ 2.4
Stock based compensation cost attributable to stock options	$ 1.1	$ 1.2
Weighted-average fair value per option at the date of grant	$ 16.52	$ 16.50
A.O. Smith Combined Compensation Plan [Member]
Stock Based Compensation [Line Items]
Number of shares available for granting of options, restricted stock or share units	1,644,334
Restricted Stock And Share Units [Member]
Stock Based Compensation [Line Items]
Award vesting period	3 years
Share units granted under the plan	83,800	75,625
Value of share units at the date of issuance	$ 3.9	$ 3.3
Share based compensation expense attributable to share units	$ 1.3	$ 1.2
Stock Options [Member]
Stock Based Compensation [Line Items]
Award vesting period	3 years	3 years
Award expiration period	10 years

Stock Based Compensation (Schedule Of Changes In Option Shares) (Details) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2012 USD ($) yr $ / shares shares
Stock Based Compensation [Abstract]
Weighted-Avg. Per Share Exercise Price, Outstanding at Beginning of Period \| $ / shares	$ 24.84
Weighted-Avg. Per Share Exercise Price - Granted \| $ / shares	45.97
Weighted-Avg. Per Share Exercise Price - Exercised \| $ / shares	23.64
Weighted-Avg. Per Share Exercise Price, Outstanding at End of Period \| $ / shares	28.23
Weighted-Avg. Per Share Exercise Price, Exercisable \| $ / shares	$ 22.90
Outstanding, Beginning Balance \| shares	1,421,867
Granted \| shares	190,600
Exercised \| shares	(315,450)
Outstanding, Ending Balance \| shares	1,297,017
Exercisable at End of Period \| shares	929,373
Aggregate Intrinsic Value, Outstanding at End of Period \| $	$ 21.9
Aggregate Intrinsic Value, Exercisable at End of Period \| $	$ 20.5
Average Remaining Contractual Life, Outstanding at End of Period, Years \| yr	7
Average Remaining Contractual Life, Exercisable at End of Period, Years \| yr	7

Stock Based Compensation (Schedule Of Weighted-Average Fair Value Per Option At The Date Of Grant) (Details) - yr	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Stock Based Compensation [Abstract]
Expected life (years)	6.2	6.4
Risk-free interest rate	2.00%	3.60%
Dividend yield	1.40%	1.30%
Expected volatility	39.40%	38.40%

Stock Based Compensation (Schedule Of Share Unit Activity Under The Plan) (Details) - Restricted Stock And Share Units [Member] - $ / shares	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Stock Based Compensation [Line Items]
Number of Units Issued and unvested, Beginning of Period	286,554
Number of Units - Granted	83,800	75,625
Number of Units - Vested	(132,974)
Number of Units Issued and unvested, End of Period	237,380
Weighted-Average Grant Date Value, Beginning of Period	$ 27.36
Weighted-Average Grant Date Value - Granted	45.97
Weighted-Average Grant Date Value - Vested	18.80
Weighted-Average Grant Date Value, End of Period	$ 38.72

- Definition

The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

+ References + Details

Pensions (Narrative) (Details) $ in Millions	3 Months Ended
Pensions (Narrative) (Details) $ in Millions	Mar. 31, 2011 USD ($)
Pensions [Abstract]
Contributions made by company	$ 45.0
Defined benefit plan expense associated with discontinued operations	$ 0.5

Pensions (Schedule Of Components Of Net Pension Expense) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Pensions [Abstract]
Service cost	$ 2.0	$ 2.4
Interest cost	10.8	11.2
Expected return on plan assets	(17.2)	(17.5)
Amortization of unrecognized loss	8.0	5.7
Amortization of prior service cost	(0.2)	(0.2)
Defined benefit plan expense	$ 3.4	$ 1.6

- Definition

An amount calculated as a basis for determining the extent of delayed recognition of the effects of changes in the fair value of assets. The expected return on plan assets is determined based on the expected long-term rate of return on plan assets and the market-related value of plan assets.

+ References

+ Details

- Definition

The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time.

+ References + Details

- Definition

The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 106
-Paragraph 518
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 264
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph a, h
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (h)(1)
-URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Service Cost (Component of Net Periodic Pension Cost)
-URI http://asc.fasb.org/extlink&oid=6525008

+ Details

Operations By Segment (Schedule Of Operating Earnings) (Details) - USD ($)
$ in Millions

3 Months Ended

Mar. 31, 2012

Mar. 31, 2011

Segment Reporting Information [Line Items]

Net sales

$ 468.6

$ 417.4

Operating earnings

56.4

48.9

Corporate income (expense)

^[1]

16.5

(13.4)

Interest expense

(3.0)

(1.8)

Earnings before income taxes

69.9

33.7

Provision for income taxes

22.4

9.5

Earnings from continuing operations

47.5

24.2

Net gain (loss) on investments

27.2

(1.6)

North America [Member]

Segment Reporting Information [Line Items]

Net sales

353.3

321.7

Operating earnings

42.2

38.1

Rest Of World [Member]

Segment Reporting Information [Line Items]

Net sales

124.2

105.2

Operating earnings

14.2

10.8

Inter-Segment Sales [Member]

Segment Reporting Information [Line Items]

Net sales

$ (8.9)

$ (9.5)

[1]	Includes net gain (loss) on investments

Fair Value Measurements (Schedule Of Assets Measured At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Millions	Mar. 31, 2012	Dec. 31, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value	$ 61.5	$ 162.0
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value	$ 61.5	144.2
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value		$ 17.8

Derivative Instruments (Narrative) (Details) shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011 USD ($)	Aug. 22, 2011 shares
Trading Activity, Gains and Losses, Net [Line Items]
Commodity hedges outstanding, total weight of copper, in pounds	300,000
Share payments for proceeds from sale of business segment \| shares			2,830
Equity collar contract, percentage of shares hedged			50.00%
Foreign Currency Forward Contracts [Member]
Trading Activity, Gains and Losses, Net [Line Items]
Change in foreign currency valuation from discontinued operations		$ 2.3
Commodity Futures Contracts [Member]
Trading Activity, Gains and Losses, Net [Line Items]
Change in foreign currency valuation from discontinued operations		$ (0.6)
Put Option [Member]
Trading Activity, Gains and Losses, Net [Line Items]
Price of the equity collar, per share	63.29
Call Option [Member]
Trading Activity, Gains and Losses, Net [Line Items]
Price of the equity collar, per share	77.32

Derivative Instruments (Schedule Of Summary By Currency Of Foreign Currency Forward Contracts) (Details) - USD ($) $ in Millions	Mar. 31, 2012	Mar. 31, 2011
Contractual Amounts Of Foreign Currency Forward Contracts [Line Items]
Buy	$ 31.8	$ 11.6
Sell	28.3	43.6
Euro [Member]
Contractual Amounts Of Foreign Currency Forward Contracts [Line Items]
Buy	12.2	2.8
Sell	0.9	1.7
Canadian Dollar [Member]
Contractual Amounts Of Foreign Currency Forward Contracts [Line Items]
Sell	27.4	41.9
Mexican Peso [Member]
Contractual Amounts Of Foreign Currency Forward Contracts [Line Items]
Buy	13.9	$ 8.8
RMB [Member]
Contractual Amounts Of Foreign Currency Forward Contracts [Line Items]
Buy	$ 5.7

Derivative Instruments (Schedule Of Impact Of Cash Flow Hedges On The Company's Financial Statements) (Details) - USD ($) $ in Millions	Mar. 31, 2012	Dec. 31, 2011
Designated As Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative instruments, total	$ 0.6	$ (0.4)
Not Designated As Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative instruments, total		17.9
Commodities Contracts [Member] \| Designated As Hedging Instrument [Member] \| Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative instruments, liabilities		(0.1)
Foreign Currency Contracts [Member] \| Designated As Hedging Instrument [Member] \| Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative instruments, liabilities	(0.2)	(1.6)
Foreign Currency Contracts [Member] \| Designated As Hedging Instrument [Member] \| Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative instruments, assets	$ 0.8	1.3
Equity Collar Contract [Member] \| Not Designated As Hedging Instrument [Member] \| Investments [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative instruments, assets		$ 17.9

Derivative Instruments (Schedule Of Effect Of Derivative Instruments On The Statement Of Earnings) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Derivative [Line Items]
Amount of gain/(loss) recognized in OCI on derivative (effective portion)	$ 0.7	$ 0.4
Amount of gain/(loss) reclassified from Accumulated OCI into earnings (effective portion)	(0.3)	5.7
Amount of gain/(loss) recognized in earnings on a derivative (ineffective portion)
Foreign Currency Contracts [Member]
Derivative [Line Items]
Amount of gain/(loss) recognized in OCI on derivative (effective portion)	0.6	0.5
Amount of gain/(loss) recognized in earnings on a derivative (ineffective portion)
Foreign Currency Contracts [Member] \| Cost Of Products Sold [Member]
Derivative [Line Items]
Amount of gain/(loss) reclassified from Accumulated OCI into earnings (effective portion)	(0.3)
Foreign Currency Contracts [Member] \| Discontinued Operations [Member]
Derivative [Line Items]
Amount of gain/(loss) recognized in OCI on derivative (effective portion)
Amount of gain/(loss) reclassified from Accumulated OCI into earnings (effective portion)		1.9
Amount of gain/(loss) recognized in earnings on a derivative (ineffective portion)
Commodities Contracts [Member]
Derivative [Line Items]
Amount of gain/(loss) recognized in OCI on derivative (effective portion)	0.1	(0.1)
Commodities Contracts [Member] \| Cost Of Products Sold [Member]
Derivative [Line Items]
Amount of gain/(loss) reclassified from Accumulated OCI into earnings (effective portion)		0.3
Amount of gain/(loss) recognized in earnings on a derivative (ineffective portion)
Commodities Contracts [Member] \| Discontinued Operations [Member]
Derivative [Line Items]
Amount of gain/(loss) reclassified from Accumulated OCI into earnings (effective portion)		3.5
Amount of gain/(loss) recognized in earnings on a derivative (ineffective portion)
Not Designated As Hedging Instrument [Member] \| Equity Collar Contract [Member] \| Other Expense - Net [Member]
Derivative [Line Items]
Amount of loss recognized in earnings from continuing operations on derivative	$ 17.9	$ 1.6

Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
Income Taxes (Details) - USD ($) $ in Millions	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011
Effective tax rate	32.00%	28.20%	31.10%
Unrecognized tax benefits	$ 1.8
Unrecognized tax benefits that would affect the effective tax rate if recognized	$ 1.3
Scenario, Forecast [Member]
Effective tax rate	30.00%

Investment In RBC Shares (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2012	Dec. 31, 2011
Investment In RBC Shares [Abstract]
Proceeds from sale of business segment, shares	2,830
Value of shares from sale of business segment		$ 144.4
Unrealized after tax gain on sale of investments	$ 1.9	1.2
Net proceeds from the sale of company shares	$ 187.6
RBC share price per share	$ 66.19
Pre-tax gain on sale of investments	$ 27.2
Net proceeds from sale of securities	122.9
Receivable from sale of securities	64.7
Gain on sale of RBC shares	43.2
Reclassification adjustment	$ 1.2	$ 17.9