$AOS
A O Smith Corp Stock $aos

$aos Overview Financials Valuation SEC Filings Company Website

2011 Q4 Form 10-K Financial Statement

#000119312513080129 Filed on February 27, 2013

Income Statement

Concept	2011 Q4	2011 Q3	2011 Q2
Revenue	$475.8M	$412.0M	$405.3M
YoY Change	28.53%	9.17%	8.08%
Cost Of Revenue	$320.8M	$293.3M	$293.4M
YoY Change	26.35%	8.55%	12.5%
Gross Profit	$155.0M	$118.7M	$111.9M
YoY Change	33.28%	10.73%	-2.01%
Gross Profit Margin	32.58%	28.81%	27.61%
Selling, General & Admin	$106.2M	$92.20M	$85.10M
YoY Change	23.49%	12.58%	1.55%
% of Gross Profit	68.52%	77.67%	76.05%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$13.80M	$11.40M	$11.00M
YoY Change	20.0%	14.0%	19.57%
% of Gross Profit	8.9%	9.6%	9.83%
Operating Expenses	$105.1M	$92.20M	$85.10M
YoY Change	24.38%	12.17%	0.12%
Operating Profit	$49.90M	$39.90M	$49.30M
YoY Change	56.92%	59.6%	68.84%
Interest Expense	-$2.900M	$2.500M	$2.100M
YoY Change	52.63%	-247.06%	-231.25%
% of Operating Profit	-5.81%	6.27%	4.26%
Other Income/Expense, Net		$15.80M	$5.100M
YoY Change
Pretax Income	$47.00M	$39.80M	$41.00M
YoY Change	57.72%	70.82%	-721.21%
Income Tax	$15.50M	$12.90M	$12.40M
% Of Pretax Income	32.98%	32.41%	30.24%
Net Earnings	$32.10M	$182.3M	$50.30M
YoY Change	-3.89%	469.69%	203.01%
Net Earnings / Revenue	6.75%	44.25%	12.41%
Basic Earnings Per Share	$0.69	$3.94	$1.09
Diluted Earnings Per Share	$0.69	$3.91	$1.08
COMMON SHARES
Basic Shares Outstanding		46.22M shares	46.19M shares
Diluted Shares Outstanding		46.64M shares	46.65M shares

Balance Sheet

Concept	2011 Q4	2011 Q3	2011 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$625.8M	$595.3M	$108.2M
YoY Change	426.32%	445.65%	15.11%
Cash & Equivalents	$463.4M	$440.6M	$108.2M
Short-Term Investments	$162.4M	$154.7M
Other Short-Term Assets	$21.50M	$85.90M	$393.7M
YoY Change	-93.22%	12.58%	432.75%
Inventory	$168.4M	$176.7M	$161.6M
Prepaid Expenses
Receivables	$368.4M	$369.5M	$327.7M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$1.209B	$1.227B	$991.2M
YoY Change	34.9%	40.05%	17.79%
LONG-TERM ASSETS
Property, Plant & Equipment	$315.3M	$308.7M	$266.3M
YoY Change	22.02%	-23.04%	-31.86%
Goodwill	$433.8M	$111.4M
YoY Change	33.97%
Intangibles	$352.7M
YoY Change
Long-Term Investments
YoY Change
Other Assets	$38.50M	$39.10M	$455.9M
YoY Change	-92.68%	-13.88%	785.24%
Total Long-Term Assets	$1.140B	$1.131B	$1.152B
YoY Change	-6.12%	0.1%	2.33%
TOTAL ASSETS
Total Short-Term Assets	$1.209B	$1.227B	$991.2M
Total Long-Term Assets	$1.140B	$1.131B	$1.152B
Total Assets	$2.349B	$2.359B	$2.143B
YoY Change	11.3%	17.55%	8.94%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$302.5M	$276.3M	$258.3M
YoY Change	15.02%	-18.21%	-29.94%
Accrued Expenses	$74.10M	$124.3M	$87.70M
YoY Change	-18.12%	-3.04%	-25.87%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change		-100.0%	-100.0%
Long-Term Debt Due	$18.60M	$18.60M	$18.60M
YoY Change	0.0%	-11.85%	-11.85%
Total Short-Term Liabilities	$512.3M	$619.7M	$535.9M
YoY Change	-4.56%	-9.64%	-20.34%
LONG-TERM LIABILITIES
Long-Term Debt	$443.0M	$376.3M	$356.9M
YoY Change	82.76%	285.95%	259.78%
Other Long-Term Liabilities	$56.90M	$205.3M	$280.5M
YoY Change	-87.36%	-43.19%	-24.33%
Total Long-Term Liabilities	$499.9M	$581.6M	$637.4M
YoY Change	-27.8%	26.74%	35.65%
TOTAL LIABILITIES
Total Short-Term Liabilities	$512.3M	$619.7M	$535.9M
Total Long-Term Liabilities	$499.9M	$581.6M	$637.4M
Total Liabilities	$1.263B	$1.235B	$1.173B
YoY Change	2.77%	6.14%	1.01%
SHAREHOLDERS EQUITY
Retained Earnings	$729.9M
YoY Change
Common Stock	$692.9M
YoY Change
Preferred Stock
YoY Change
Treasury Stock (at cost)	$72.40M
YoY Change
Treasury Stock Shares
Shareholders Equity	$1.086B	$1.124B	$969.8M
YoY Change
Total Liabilities & Shareholders Equity	$2.349B	$2.359B	$2.143B
YoY Change	11.3%	17.55%	8.94%

Cashflow Statement

Concept	2011 Q4	2011 Q3	2011 Q2
OPERATING ACTIVITIES
Net Income	$32.10M	$182.3M	$50.30M
YoY Change	-3.89%	469.69%	203.01%
Depreciation, Depletion And Amortization	$13.80M	$11.40M	$11.00M
YoY Change	20.0%	14.0%	19.57%
Cash From Operating Activities	$128.1M	$17.80M	-$35.00M
YoY Change	129.16%	-2.2%	-153.76%
INVESTING ACTIVITIES
Capital Expenditures	-$16.80M	-$12.40M	-$11.90M
YoY Change	3.07%	-41.23%	41.67%
Acquisitions
YoY Change
Other Investing Activities	-$130.6M	$311.4M	$1.400M
YoY Change	2191.23%	-5204.92%	0.0%
Cash From Investing Activities	-$147.4M	$299.0M	-$10.50M
YoY Change	570.0%	-1199.26%	50.0%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	42.10M	15.60M	29.50M
YoY Change	-274.69%	-35.27%	-167.2%
NET CHANGE
Cash From Operating Activities	128.1M	17.80M	-35.00M
Cash From Investing Activities	-147.4M	299.0M	-10.50M
Cash From Financing Activities	42.10M	15.60M	29.50M
Net Change In Cash	22.80M	332.4M	-16.00M
YoY Change	132.65%	2101.32%	-212.68%
FREE CASH FLOW
Cash From Operating Activities	$128.1M	$17.80M	-$35.00M
Capital Expenditures	-$16.80M	-$12.40M	-$11.90M
Free Cash Flow	$144.9M	$30.20M	-$23.10M
YoY Change	100.69%	-23.16%	-131.43%

Facts In Submission

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CY2012Q4	us-gaap	Defined Benefit Plan Year That Rate Reaches Ultimate Trend Rate DefinedBenefitPlanYearThatRateReachesUltimateTrendRate	2017
CY2012Q4	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Outstanding Options ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions	765367	shares
CY2012Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	46500000
CY2012Q4	us-gaap	Capitalized Computer Software Gross CapitalizedComputerSoftwareGross	18900000
CY2012Q4	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Exercisable Options ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions	409656	shares
CY2012Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	136100000
CY2012Q4	us-gaap	Deferred Tax Assets Liabilities Net Current DeferredTaxAssetsLiabilitiesNetCurrent	33200000
CY2012Q4	us-gaap	Defined Benefit Plan Weighted Average Asset Allocations DefinedBenefitPlanWeightedAverageAssetAllocations	1.00	pure
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	26.05
CY2012Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	900000
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	7100000
CY2012Q4	us-gaap	Inventory Work In Process InventoryWorkInProcess	12000000
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	9400000
CY2012Q4	us-gaap	Inventory Gross InventoryGross	186400000
CY2012Q4	us-gaap	Product Warranty Accrual ProductWarrantyAccrual	129600000
CY2012Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	4200000
CY2012Q4	us-gaap	Receivables Net Current ReceivablesNetCurrent	425400000
CY2012Q4	us-gaap	Marketable Securities Current MarketableSecuritiesCurrent	196000000
CY2012Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	32900000
CY2012Q4	us-gaap	Liabilities Liabilities	1071100000
CY2012Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1300000
CY2012Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	1500000
CY2012Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	52100000
CY2012Q4	us-gaap	Notional Amount Of Foreign Currency Derivative Sale Contracts NotionalAmountOfForeignCurrencyDerivativeSaleContracts	41100000
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	2900000
CY2012Q4	us-gaap	Valuation Allowance Amount ValuationAllowanceAmount	7400000
CY2012Q4	us-gaap	Line Of Credit Facility Current Borrowing Capacity LineOfCreditFacilityCurrentBorrowingCapacity	400000000
CY2012Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	3000000	shares
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	340700000
CY2012Q4	us-gaap	Deferred Tax Assets Net Noncurrent DeferredTaxAssetsNetNoncurrent	2000000
CY2012Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	855100000
CY2012Q4	us-gaap	Assets Assets	2265200000
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	33.43
CY2012Q4	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	500000000
CY2012Q4	us-gaap	Notes Payable Fair Value Disclosure NotesPayableFairValueDisclosure	86600000
CY2012Q4	us-gaap	Inventory Net InventoryNet	163400000
CY2012Q4	us-gaap	Notional Amount Of Foreign Currency Derivative Purchase Contracts NotionalAmountOfForeignCurrencyDerivativePurchaseContracts	35500000
CY2012Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	197200000
CY2012Q4	us-gaap	Notes Payable NotesPayable	80000000
CY2012Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	1
CY2012Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2265200000
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Aggregate Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue	15200000
CY2012Q4	us-gaap	Long Term Debt LongTermDebt	243700000
CY2012Q4	us-gaap	Treasury Stock Value TreasuryStockValue	69600000
CY2012Q4	us-gaap	Product Warranty Accrual Noncurrent ProductWarrantyAccrualNoncurrent	86400000
CY2012Q4	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	190100000
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Aggregate Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue	22700000
CY2012Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	266900000
CY2012Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	237800000
CY2012Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	41021973	shares
CY2012Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	338700000
CY2012Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	45600000
CY2012Q4	us-gaap	Land Land	11600000
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	14600000
CY2012Q4	us-gaap	Noncurrent Assets NoncurrentAssets	375000000
CY2012Q4	us-gaap	Deferred Tax Assets Liabilities Net Noncurrent DeferredTaxAssetsLiabilitiesNetNoncurrent	2000000
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	10300000
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-320500000
CY2012Q4	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation Noncurrent LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationNoncurrent	7800000
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Warranty Reserves DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsWarrantyReserves	57300000
CY2012Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	58700000
CY2012Q4	us-gaap	Inventory Raw Materials InventoryRawMaterials	100000000
CY2012Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	35700000
CY2012Q4	us-gaap	Goodwill Gross GoodwillGross	435400000
CY2012Q4	us-gaap	Other Postretirement Defined Benefit Plan Liabilities Noncurrent OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent	10600000
CY2012Q4	us-gaap	Liabilities Current LiabilitiesCurrent	499000000
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	765367	shares
CY2012Q4	us-gaap	Common Stock Value CommonStockValue	41000000
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	14600000
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Cumulative Changes In Net Gain Loss From Cash Flow Hedges Effect Net Of Tax AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax	700000
CY2012Q4	us-gaap	Assets Current AssetsCurrent	1107200000
CY2012Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	74400000
CY2012Q4	us-gaap	Accounts Payable Trade Current AccountsPayableTradeCurrent	328900000
CY2012Q4	us-gaap	Preferred Stock Value PreferredStockValue
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	45100000
CY2012Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	334900000
CY2012Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	345700000
CY2012Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	18600000
CY2012Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	225100000
CY2012Q4	us-gaap	Deferred Tax Liabilities Undistributed Foreign Earnings DeferredTaxLiabilitiesUndistributedForeignEarnings	65100000
CY2012Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	200000
CY2012Q4	us-gaap	Percentage Of Lifo Inventory PercentageOfLIFOInventory	0.64	pure
CY2012Q4	aos	Deferred Tax Assets Accounts Receivable DeferredTaxAssetsAccountsReceivable	11200000
CY2012Q4	aos	Deferred Tax Liabilities Inventories DeferredTaxLiabilitiesInventories	2400000
CY2012Q4	aos	Gross Carrying Amount Total Intangible Assets GrossCarryingAmountTotalIntangibleAssets	384300000
CY2012Q4	aos	Defined Benefit Plan Fair Value Of Non Investment Plan Assets DefinedBenefitPlanFairValueOfNonInvestmentPlanAssets	800000
CY2012Q4	aos	Deferred Tax Asset Tax Loss And Credit Carryovers DeferredTaxAssetTaxLossAndCreditCarryovers	15300000
CY2012Q4	aos	Net Operating Losses And Tax Credits NetOperatingLossesAndTaxCredits	15300000
CY2012Q4	aos	Deferred Tax Asset Environmental DeferredTaxAssetEnvironmental	3200000
CY2012Q4	aos	Product Liability Individual Claim Maximum Amount ProductLiabilityIndividualClaimMaximumAmount	5000000
CY2012Q4	aos	Undistributed Foreign Earnings Reinvested UndistributedForeignEarningsReinvested	392000000
CY2012Q4	aos	Undistributed Foreign Earnings UndistributedForeignEarnings	663000000
CY2012Q4	aos	Share Payments For Proceeds From Sale Of Business Segment Share Value SharePaymentsForProceedsFromSaleOfBusinessSegmentShareValue	66190000
CY2010	us-gaap	Restructuring Settlement And Impairment Provisions RestructuringSettlementAndImpairmentProvisions	100000
CY2010	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	53500000
CY2010	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	-1500000
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.036	pure
CY2012Q4	aos	Class Common Stock ClassCommonStock	33300000
CY2012Q4	aos	Class Common Stock Shares Issued ClassCommonStockSharesIssued	6654938	shares
CY2012Q4	aos	Defined Benefit Plan Fair Value Of Total Plan Assets DefinedBenefitPlanFairValueOfTotalPlanAssets	800500000
CY2010	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	1.19
CY2010	us-gaap	Net Cash Provided By Used In Discontinued Operations NetCashProvidedByUsedInDiscontinuedOperations	52700000
CY2010	us-gaap	Operating Income Loss OperatingIncomeLoss	132900000
CY2010	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	63300000
CY2010	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.005	pure
CY2010	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	57100000
CY2010	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.42
CY2012Q4	aos	Accumulated Amortization Total Intangible Assets AccumulatedAmortizationTotalIntangibleAssets	45600000
CY2012Q4	aos	Accumulated Other Comprehensive Income Loss Cumulative Changes In Net Gain Loss From Cash Flow Hedges Effects Tax AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectsTax	-500000
CY2012Q4	aos	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Tax Effect AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansTaxEffect	217900000
CY2010Q4	us-gaap	Stockholders Equity Note Stock Split Conversion Ratio StockholdersEquityNoteStockSplitConversionRatio	1.5	pure
CY2010Q4	aos	Percentage Of Stock Dividend To Stock Holders PercentageOfStockDividendToStockHolders	0.50	pure
CY2011Q3	aos	Proceeds From Sale Of Interest In Corporate Unit Shares Received ProceedsFromSaleOfInterestInCorporateUnitSharesReceived	2830000	shares
CY2012Q4	us-gaap	Line Of Credit Facility Expiration Date1 LineOfCreditFacilityExpirationDate1	2017-12-12
CY2012Q4	aos	Number Of Banks Involved In Multi Year Multi Currency Revolving Credit Agreement NumberOfBanksInvolvedInMultiYearMultiCurrencyRevolvingCreditAgreement	8	pure
CY2011Q2	us-gaap	Recovery Of Direct Costs RecoveryOfDirectCosts	35500000
CY2011Q2	aos	Provision For Product Warranty ProvisionForProductWarranty	7500000
CY2010	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	1.18
CY2010	us-gaap	Business Acquisitions Pro Forma Income Loss From Continuing Operations Before Changes In Accounting And Extraordinary Items Net Of Tax BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax	71500000
CY2010	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	1489300000
CY2010	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	11800000
CY2010	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-500000
CY2010	us-gaap	Cash Provided By Used In Investing Activities Discontinued Operations CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations	-8800000
CY2010	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	113000000
CY2010	us-gaap	Cash Provided By Used In Operating Activities Discontinued Operations CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations	61500000
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.019	pure
CY2010	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	1.56
CY2010	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	40800000
CY2010	us-gaap	Other Comprehensive Income Reclassification Of Defined Benefit Plans Net Gain Loss Recognized In Net Periodic Benefit Cost Net Of Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainLossRecognizedInNetPeriodicBenefitCostNetOfTax	-5600000
CY2010	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	27.93
CY2010	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	1664000000
CY2010	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	7000000
CY2010	us-gaap	Profit Loss ProfitLoss	111500000
CY2010	us-gaap	Gain Loss On Disposition Of Property GainLossOnDispositionOfProperty	14000000
CY2010	us-gaap	Debt Instrument Periodic Payment Interest DebtInstrumentPeriodicPaymentInterest	10500000
CY2010	us-gaap	Cash Provided By Used In Financing Activities Discontinued Operations CashProvidedByUsedInFinancingActivitiesDiscontinuedOperations
CY2010	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	62000000
CY2010	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	-0.004	pure
CY2010	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.233	pure
CY2010	us-gaap	Proceeds From Repayments Of Other Long Term Debt ProceedsFromRepaymentsOfOtherLongTermDebt	5000000
CY2010	us-gaap	Disposal Group Including Discontinued Operation Revenue DisposalGroupIncludingDiscontinuedOperationRevenue	701800000
CY2010	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-2900000
CY2010	us-gaap	Gross Profit GrossProfit	446000000
CY2010	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P6Y4M24D
CY2010	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	3000000
CY2010	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	124800000
CY2010	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-66500000
CY2010	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	500000
CY2010	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-200000
CY2010	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	-54400000
CY2010	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.016	pure
CY2010	us-gaap	Stock Option Plan Expense StockOptionPlanExpense	2200000
CY2010	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	42600000
CY2010	us-gaap	Disposal Group Including Discontinued Operation Costs Of Goods Sold DisposalGroupIncludingDiscontinuedOperationCostsOfGoodsSold	544000000
CY2010	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	24700000
CY2010	us-gaap	Advertising Expense AdvertisingExpense	47900000
CY2010	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	0	shares
CY2010	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	46162715	shares
CY2010	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	7300000
CY2010	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	74400000
CY2010	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.44
CY2010	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	37100000
CY2010	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-15700000
CY2010	us-gaap	Discontinued Operation Tax Effect Of Discontinued Operation DiscontinuedOperationTaxEffectOfDiscontinuedOperation	16200000
CY2010	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	1.25
CY2010	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	5400000
CY2010	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.134	pure
CY2010	us-gaap	Disposal Group Including Discontinued Operation Operating Income Loss DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss	54400000
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.387	pure
CY2010	us-gaap	Disposal Group Including Discontinued Operation Interest Expense DisposalGroupIncludingDiscontinuedOperationInterestExpense	3600000
CY2010	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	12400000
CY2010	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	45743246	shares
CY2010	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	2400000
CY2010	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	13900000
CY2010	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	419469	shares
CY2010	us-gaap	Income Loss From Continuing Operations Attributable To Noncontrolling Entity IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity	-200000
CY2010	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350	pure
CY2010	us-gaap	Other Comprehensive Income Defined Benefit Plans Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansTaxPortionAttributableToParent	2700000
CY2010	us-gaap	Insurance Recoveries InsuranceRecoveries	31900000
CY2010	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	700000
CY2010	us-gaap	Effect Of Lifo Inventory Liquidation On Income EffectOfLIFOInventoryLiquidationOnIncome	300000
CY2010	us-gaap	Cost Of Goods Sold CostOfGoodsSold	1043300000
CY2010	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	14100000
CY2010	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	12300000
CY2010	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.54
CY2010	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-11700000
CY2010	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	74400000
CY2010	us-gaap	Other Nonrecurring Expense OtherNonrecurringExpense	35400000
CY2010	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-3800000
CY2010	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-15700000
CY2010	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	37500000
CY2010	us-gaap	Disposal Group Including Discontinued Operation Gross Profit Loss DisposalGroupIncludingDiscontinuedOperationGrossProfitLoss	157800000
CY2010	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	100000
CY2010	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-57700000
CY2010	us-gaap	Interest Expense InterestExpense	6900000
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	10.19
CY2010	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-6600000
CY2010	aos	Amortization Of Advertising Costs AmortizationOfAdvertisingCosts	9200000
CY2010	aos	Flood Related Expenses FloodRelatedExpenses	67300000
CY2010	aos	Repair And Write Off Of Buildings And Equipment Expenses RepairAndWriteOffOfBuildingsAndEquipmentExpenses	36100000
CY2010	aos	Disposal Group Including Discontinued Operation Current Assets And Liabilities DisposalGroupIncludingDiscontinuedOperationCurrentAssetsAndLiabilities	-23300000
CY2011	us-gaap	Business Acquisitions Pro Forma Income Loss From Continuing Operations Before Changes In Accounting And Extraordinary Items Net Of Tax BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax	122500000
CY2010	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	4600000
CY2010	us-gaap	Net Income Loss NetIncomeLoss	111700000
CY2010	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	700000
CY2010	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	328700000
CY2010	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	17300000
CY2010	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0
CY2010	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	1.24
CY2010	us-gaap	Increase Decrease In Other Current Assets And Liabilities Net IncreaseDecreaseInOtherCurrentAssetsAndLiabilitiesNet	-37500000
CY2010	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	7100000
CY2010	us-gaap	Business Acquisition Pro Forma Earnings Per Share Diluted BusinessAcquisitionProFormaEarningsPerShareDiluted	1.55
CY2010	aos	Proceeds From Stock Options Activity ProceedsFromStockOptionsActivity	4000000
CY2010	aos	Disposal Group Including Discontinued Operation Noncurrent Assets And Liabilities DisposalGroupIncludingDiscontinuedOperationNoncurrentAssetsAndLiabilities	4500000
CY2010	aos	Disposal Group Including Discontinued Operation Capital Expenditures DisposalGroupIncludingDiscontinuedOperationCapitalExpenditures	14300000
CY2010	aos	Discontinued Operation Defined Benefit Plan Net Periodic Expense Income DiscontinuedOperationDefinedBenefitPlanNetPeriodicExpenseIncome	0
CY2010	aos	Discontinued Operations Tax Effect Operations Only DiscontinuedOperationsTaxEffectOperationsOnly	16200000
CY2010	aos	Government Incentives GovernmentIncentives	7000000
CY2010	aos	Disposal Group Including Discontinued Operation Other Income Expense Net DisposalGroupIncludingDiscontinuedOperationOtherIncomeExpenseNet	700000
CY2010	aos	Noncurrent Assets And Liabilities NoncurrentAssetsAndLiabilities	8800000
CY2010	aos	Disposal Group Including Discontinued Operation Restructuring And Other DisposalGroupIncludingDiscontinuedOperationRestructuringAndOther	100000
CY2010	aos	Disposal Group Including Discontinued Operation Selling General And Administrative Expenses DisposalGroupIncludingDiscontinuedOperationSellingGeneralAndAdministrativeExpenses	84200000
CY2010	aos	Increase Decrease In Accounts Receivables IncreaseDecreaseInAccountsReceivables	-33200000
CY2010	aos	Increase Decrease In Total Inventories IncreaseDecreaseInTotalInventories	-32000000
CY2010	aos	Disposal Group Including Discontinued Depreciation And Amortization DisposalGroupIncludingDiscontinuedDepreciationAndAmortization	26100000
CY2010	aos	Disposal Group Including Discontinued Operation Gain Loss On Sale Of Assets DisposalGroupIncludingDiscontinuedOperationGainLossOnSaleOfAssets	-200000
CY2010	aos	Net Inventory Loss NetInventoryLoss	16400000
CY2010	aos	Increase Decrease In Accounts Payables IncreaseDecreaseInAccountsPayables	-23300000
CY2010	aos	Nonrecurring Equipment Expense NonrecurringEquipmentExpense	22100000
CY2010	aos	Proceeds From Sale Of Other Assets Discontinued Operations ProceedsFromSaleOfOtherAssetsDiscontinuedOperations	5500000
CY2010	aos	Site Cleanup And Restoration Expenses SiteCleanupAndRestorationExpenses	14800000
CY2010	aos	Discontinued Operation Defined Contribution Plan Cost DiscontinuedOperationDefinedContributionPlanCost	1200000
CY2010	aos	Disposal Group Including Discontinued Operation Income Loss Before Income Taxes DisposalGroupIncludingDiscontinuedOperationIncomeLossBeforeIncomeTaxes	70600000
CY2010	aos	Corporate Income Expense CorporateIncomeExpense	-51600000
CY2011	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	4.18
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.036	pure
CY2011	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	4.22
CY2011	us-gaap	Discontinued Operation Tax Effect Of Income Loss From Disposal Of Discontinued Operation DiscontinuedOperationTaxEffectOfIncomeLossFromDisposalOfDiscontinuedOperation	145600000
CY2011	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	200000
CY2011	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	23500000
CY2011	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	43700000
CY2011	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	-0.006	pure
CY2011	us-gaap	Proceeds From Repayments Of Other Long Term Debt ProceedsFromRepaymentsOfOtherLongTermDebt	200200000
CY2011	us-gaap	Disposal Group Including Discontinued Operation Revenue DisposalGroupIncludingDiscontinuedOperationRevenue	531800000
CY2011	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-28000000
CY2011	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.311	pure
CY2011	us-gaap	Net Cash Provided By Used In Discontinued Operations NetCashProvidedByUsedInDiscontinuedOperations	597900000
CY2011	us-gaap	Operating Income Loss OperatingIncomeLoss	196500000
CY2011	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	1710500000
CY2011	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-700000
CY2011	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	421100000
CY2011	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	19800000
CY2011	us-gaap	Valuation Allowances And Reserves Deductions ValuationAllowancesAndReservesDeductions	100000
CY2011	us-gaap	Cash Provided By Used In Investing Activities Discontinued Operations CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations	600200000
CY2011	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	234200000
CY2011	us-gaap	Cash Provided By Used In Operating Activities Discontinued Operations CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations	-2300000
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.013	pure
CY2011	us-gaap	Derivative Instruments Gain Loss Recognized In Other Comprehensive Income Effective Portion Net DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet	500000
CY2011	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	2.66
CY2011	us-gaap	Asset Impairment Charges AssetImpairmentCharges	3300000
CY2011	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	47000000
CY2011	us-gaap	Other Comprehensive Income Reclassification Of Defined Benefit Plans Net Gain Loss Recognized In Net Periodic Benefit Cost Net Of Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainLossRecognizedInNetPeriodicBenefitCostNetOfTax	-54500000
CY2011	us-gaap	Defined Benefit Plan Health Care Cost Trend Rate Assumed For Next Fiscal Year DefinedBenefitPlanHealthCareCostTrendRateAssumedForNextFiscalYear	0.1000	pure
CY2011	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	1835800000
CY2011	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	61000000
CY2011	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.001	pure
CY2011	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	111200000
CY2011	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	6.57
CY2011	us-gaap	Restructuring Settlement And Impairment Provisions RestructuringSettlementAndImpairmentProvisions	-11200000
CY2011	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions
CY2011	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	53500000
CY2011	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	-4500000
CY2011	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	63300000
CY2011	us-gaap	Product Warranty Accrual Payments ProductWarrantyAccrualPayments	58300000
CY2011	us-gaap	Goodwill Translation Adjustments GoodwillTranslationAdjustments	-1400000
CY2011	us-gaap	Valuation Allowances And Reserves Reserves Of Businesses Acquired ValuationAllowancesAndReservesReservesOfBusinessesAcquired	6600000
CY2011	us-gaap	Profit Loss ProfitLoss	305700000
CY2011	us-gaap	Debt Instrument Periodic Payment Interest DebtInstrumentPeriodicPaymentInterest	11500000
CY2011	us-gaap	Cash Provided By Used In Financing Activities Discontinued Operations CashProvidedByUsedInFinancingActivitiesDiscontinuedOperations
CY2011	us-gaap	Product Warranty Accrual Additions From Business Acquisition ProductWarrantyAccrualAdditionsFromBusinessAcquisition	5800000
CY2011	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	-194500000
CY2011	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.032	pure
CY2011	us-gaap	Stock Option Plan Expense StockOptionPlanExpense	2800000
CY2011	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	151500000
CY2011	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-5200000
CY2011	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	16100000
CY2011	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	344500000
CY2011	us-gaap	Disposal Group Including Discontinued Operation Costs Of Goods Sold DisposalGroupIncludingDiscontinuedOperationCostsOfGoodsSold	415600000
CY2011	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	455586	shares
CY2011	us-gaap	Gain On Sale Of Investments GainOnSaleOfInvestments	19800000
CY2011	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350	pure
CY2011	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P6Y4M24D
CY2011	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	58700000
CY2011	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	125600000
CY2011	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	11900000
CY2011	us-gaap	Defined Benefit Plan Ultimate Health Care Cost Trend Rate DefinedBenefitPlanUltimateHealthCareCostTrendRate	0.0500	pure
CY2011	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	23500000
CY2011	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-11000000
CY2011	us-gaap	Product Warranty Expense ProductWarrantyExpense	64600000
CY2011	us-gaap	Gain Loss On Price Risk Hedge Ineffectiveness GainLossOnPriceRiskHedgeIneffectiveness	100000
CY2011	us-gaap	Derivative Instruments Gain Loss Reclassified From Accumulated Oci Into Income Effective Portion Net DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet	21000000
CY2011	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	27700000
CY2011	us-gaap	Advertising Expense AdvertisingExpense	58900000
CY2011	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	611589	shares
CY2011	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	46574618	shares
CY2011	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-7200000
CY2011	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	161500000
CY2011	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	6.63
CY2011	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	42700000
CY2011	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	160200000
CY2011	us-gaap	Discontinued Operation Tax Effect Of Discontinued Operation DiscontinuedOperationTaxEffectOfDiscontinuedOperation	15500000
CY2011	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	2.41
CY2011	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	5700000
CY2011	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.043	pure
CY2011	us-gaap	Disposal Group Including Discontinued Operation Operating Income Loss DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss	43000000
CY2011	us-gaap	Restructuring Reserve Settled With Cash RestructuringReserveSettledWithCash	1700000
CY2011	us-gaap	Gain Loss Related To Litigation Settlement GainLossRelatedToLitigationSettlement	11200000
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.384	pure
CY2011	us-gaap	Disposal Group Including Discontinued Operation Interest Expense DisposalGroupIncludingDiscontinuedOperationInterestExpense	2200000
CY2011	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	117800000
CY2011	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	46119032	shares
CY2011	us-gaap	Other Comprehensive Income Defined Benefit Plans Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansTaxPortionAttributableToParent	34800000
CY2011	us-gaap	Effect Of Lifo Inventory Liquidation On Income EffectOfLIFOInventoryLiquidationOnIncome	400000
CY2011	us-gaap	Cost Of Goods Sold CostOfGoodsSold	1197900000
CY2011	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	4900000
CY2011	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	117200000
CY2011	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	4300000
CY2011	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	372800000
CY2011	us-gaap	Restructuring Reserve Period Increase Decrease RestructuringReservePeriodIncreaseDecrease	-11200000
CY2011	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	111400000
CY2011	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	50300000
CY2011	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0
CY2011	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	2.39
CY2011	us-gaap	Increase Decrease In Other Current Assets And Liabilities Net IncreaseDecreaseInOtherCurrentAssetsAndLiabilitiesNet	400000
CY2011	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	1800000
CY2011	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.60
CY2011	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-1000000
CY2011	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	161500000
CY2011	us-gaap	Gross Profit GrossProfit	512600000
CY2011	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	160200000
CY2011	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	-400000
CY2011	us-gaap	Disposal Group Including Discontinued Operation Gross Profit Loss DisposalGroupIncludingDiscontinuedOperationGrossProfitLoss	116200000
CY2011	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	7000000
CY2011	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-474600000
CY2011	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	3400000
CY2011	us-gaap	Net Income Loss NetIncomeLoss	305700000
CY2011	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	1200000
CY2011	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	9600000
CY2011	us-gaap	Business Acquisition Pro Forma Earnings Per Share Diluted BusinessAcquisitionProFormaEarningsPerShareDiluted	2.63
CY2011	us-gaap	Interest Expense InterestExpense	9300000
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	16.51
CY2011	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-2700000
CY2011	aos	Other Comprehensive Income Loss Minimum Pension Liability Net Adjustment Tax Effect OtherComprehensiveIncomeLossMinimumPensionLiabilityNetAdjustmentTaxEffect	54500000
CY2011	aos	Amortization Of Advertising Costs AmortizationOfAdvertisingCosts	13100000
CY2011	aos	Commissions Taxes And Other Sale Related Payments CommissionsTaxesAndOtherSaleRelatedPayments	147900000
CY2011	aos	Cash Payments For Proceeds From Sale Of Business Segment CashPaymentsForProceedsFromSaleOfBusinessSegment	752500000
CY2011	aos	Disposal Group Including Discontinued Operation Current Assets And Liabilities DisposalGroupIncludingDiscontinuedOperationCurrentAssetsAndLiabilities	-56200000
CY2011	aos	Proceeds From Stock Options Activity ProceedsFromStockOptionsActivity	11200000
CY2011	aos	Net Operating Losses And Tax Credits Additions NetOperatingLossesAndTaxCreditsAdditions	10300000
CY2011	aos	Disposal Group Including Discontinued Operation Noncurrent Assets And Liabilities DisposalGroupIncludingDiscontinuedOperationNoncurrentAssetsAndLiabilities	900000
CY2011	aos	Disposal Group Including Discontinued Operation Capital Expenditures DisposalGroupIncludingDiscontinuedOperationCapitalExpenditures	10500000
CY2011	aos	Discontinued Operation Defined Benefit Plan Net Periodic Expense Income DiscontinuedOperationDefinedBenefitPlanNetPeriodicExpenseIncome	-1600000
CY2011	aos	Discontinued Operations Tax Effect Operations Only DiscontinuedOperationsTaxEffectOperationsOnly	15500000
CY2011	aos	Disposal Group Including Discontinued Operation Other Income Expense Net DisposalGroupIncludingDiscontinuedOperationOtherIncomeExpenseNet	6000000
CY2012	dei	Document Period End Date DocumentPeriodEndDate	2012-12-31
CY2012	dei	Entity Central Index Key EntityCentralIndexKey	0000091142
CY2012	dei	Amendment Flag AmendmentFlag	false
CY2012	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2012	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2011	aos	Provision For Product Warranty ProvisionForProductWarranty	7500000
CY2011	aos	Proceeds From Sale Of Other Assets Discontinued Operations ProceedsFromSaleOfOtherAssetsDiscontinuedOperations	6100000
CY2011	aos	Maximum Aggregate Product Liability Insurance Coverage MaximumAggregateProductLiabilityInsuranceCoverage	125000000
CY2012	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2012	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2012
CY2012	dei	Document Type DocumentType	10-K
CY2011	aos	Noncurrent Assets And Liabilities NoncurrentAssetsAndLiabilities	78800000
CY2011	aos	Disposal Group Including Discontinued Operation Other DisposalGroupIncludingDiscontinuedOperationOther	-1700000
CY2011	aos	Net Operating Losses And Tax Credits Deductions NetOperatingLossesAndTaxCreditsDeductions	9300000
CY2011	aos	Disposal Group Including Discontinued Operation Selling General And Administrative Expenses DisposalGroupIncludingDiscontinuedOperationSellingGeneralAndAdministrativeExpenses	61500000
CY2011	aos	Increase Decrease In Accounts Receivables IncreaseDecreaseInAccountsReceivables	-28100000
CY2011	aos	Increase Decrease In Total Inventories IncreaseDecreaseInTotalInventories	4700000
CY2011	aos	Disposal Group Including Discontinued Depreciation And Amortization DisposalGroupIncludingDiscontinuedDepreciationAndAmortization	16500000
CY2011	aos	Disposal Group Including Discontinued Operation Gain Loss On Sale Of Assets DisposalGroupIncludingDiscontinuedOperationGainLossOnSaleOfAssets	-4800000
CY2011	aos	Effective Income Tax Rate Reconciliation State Tax Credits EffectiveIncomeTaxRateReconciliationStateTaxCredits	-0.023	pure
CY2011	aos	Increase Decrease In Accounts Payables IncreaseDecreaseInAccountsPayables	-27400000
CY2011	aos	Discontinued Operation Defined Contribution Plan Cost DiscontinuedOperationDefinedContributionPlanCost	900000
CY2011	aos	Disposal Group Including Discontinued Operation Income Loss Before Income Taxes DisposalGroupIncludingDiscontinuedOperationIncomeLossBeforeIncomeTaxes	58500000
CY2011	aos	Corporate Income Expense CorporateIncomeExpense	-25700000
CY2012	dei	Trading Symbol TradingSymbol	AOS
CY2012	dei	Entity Registrant Name EntityRegistrantName	SMITH A O CORP
CY2012	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2012	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2012	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2012	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	-0.08
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.020	pure
CY2012	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	-0.08
CY2012	us-gaap	Discontinued Operation Tax Effect Of Income Loss From Disposal Of Discontinued Operation DiscontinuedOperationTaxEffectOfIncomeLossFromDisposalOfDiscontinuedOperation	6300000
CY2012	us-gaap	Net Cash Provided By Used In Discontinued Operations NetCashProvidedByUsedInDiscontinuedOperations	-27400000
CY2012	us-gaap	Operating Income Loss OperatingIncomeLoss	259400000
CY2012	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	1939300000
CY2012	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Other EffectiveIncomeTaxRateReconciliationTaxCreditsOther	-0.021	pure
CY2012	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	700000
CY2012	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P7Y
CY2012	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	13500000
CY2012	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	218800000
CY2012	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	34300000
CY2012	us-gaap	Valuation Allowances And Reserves Deductions ValuationAllowancesAndReservesDeductions	4000000
CY2012	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	139100000
CY2012	us-gaap	Cash Provided By Used In Operating Activities Discontinued Operations CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations	-27400000
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.014	pure
CY2012	us-gaap	Derivative Instruments Gain Loss Recognized In Other Comprehensive Income Effective Portion Net DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet	600000
CY2012	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	54600000
CY2012	us-gaap	Other Comprehensive Income Reclassification Of Defined Benefit Plans Net Gain Loss Recognized In Net Periodic Benefit Cost Net Of Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainLossRecognizedInNetPeriodicBenefitCostNetOfTax	-22400000
CY2012	us-gaap	Defined Benefit Plan Health Care Cost Trend Rate Assumed For Next Fiscal Year DefinedBenefitPlanHealthCareCostTrendRateAssumedForNextFiscalYear	0.1000	pure
CY2012	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	171200000
CY2012	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.002	pure
CY2012	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	162600000
CY2012	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.41
CY2012	us-gaap	Restructuring Settlement And Impairment Provisions RestructuringSettlementAndImpairmentProvisions	-3900000
CY2012	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions
CY2012	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	69900000
CY2012	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	-800000
CY2012	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-3800000
CY2012	us-gaap	Product Warranty Accrual Payments ProductWarrantyAccrualPayments	56300000
CY2012	us-gaap	Goodwill Translation Adjustments GoodwillTranslationAdjustments	1600000
CY2012	us-gaap	Valuation Allowances And Reserves Reserves Of Businesses Acquired ValuationAllowancesAndReservesReservesOfBusinessesAcquired	3000000
CY2012	us-gaap	Profit Loss ProfitLoss	158700000
CY2012	us-gaap	Debt Instrument Periodic Payment Interest DebtInstrumentPeriodicPaymentInterest	9400000
CY2012	us-gaap	Cash Provided By Used In Financing Activities Discontinued Operations CashProvidedByUsedInFinancingActivitiesDiscontinuedOperations
CY2012	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	500000
CY2012	us-gaap	Defined Benefit Plan Curtailments DefinedBenefitPlanCurtailments	12300000
CY2012	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	22000000
CY2012	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	75200000
CY2012	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	51500000
CY2012	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.304	pure
CY2012	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P6Y2M12D
CY2012	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	143800000
CY2012	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-86800000
CY2012	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	4600000
CY2012	us-gaap	Defined Benefit Plan Ultimate Health Care Cost Trend Rate DefinedBenefitPlanUltimateHealthCareCostTrendRate	0.0500	pure
CY2012	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	22000000
CY2012	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	1000000
CY2012	us-gaap	Product Warranty Expense ProductWarrantyExpense	54100000
CY2012	us-gaap	Derivative Instruments Gain Loss Reclassified From Accumulated Oci Into Income Effective Portion Net DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet	-800000
CY2012	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	3900000
CY2012	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.033	pure
CY2012	us-gaap	Stock Option Plan Expense StockOptionPlanExpense	3200000
CY2012	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	-3900000
CY2012	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-196500000
CY2012	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Writedown Of Securities Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForWritedownOfSecuritiesIncludedInNetIncomeNetOfTax	17900000
CY2012	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	33200000
CY2012	us-gaap	Advertising Expense AdvertisingExpense	69200000
CY2012	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	426490	shares
CY2012	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P17M
CY2012	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	46554061	shares
CY2012	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	3000000
CY2012	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	233800000
CY2012	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.44
CY2012	us-gaap	Nature Of Operations NatureOfOperations	<div> <p style="MARGIN-TOP: 12px; MARGIN-BOTTOM: 0px"><font style="FONT-FAMILY: Times New Roman" size="2"><b>Organization.</b> A. O. Smith Corporation (A. O. Smith or the company) is a manufacturer of water heaters and boilers, serving a diverse mix of residential and commercial end markets principally in the United States with a strong and growing international presence. The company is comprised of two reporting segments: North America and Rest of World. The Rest of World segment is primarily comprised of China, India and Europe. Both segments manufacture and market comprehensive lines of residential gas, gas tankless 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.</font></p> <p style="MARGIN-TOP: 12px; MARGIN-BOTTOM: 0px"><font style="FONT-FAMILY: Times New Roman" size="2">On August 22, 2011, the company sold its Electrical Products business (EPC) to Regal Beloit Corporation (RBC) for approximately $760 million in cash and approximately 2.83 million shares of RBC common stock. Due to the sale, EPC has been reported separately as a discontinued operation. See Note 2 Discontinued Operations.</font></p> </div>
CY2012	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	51700000
CY2012	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-253500000
CY2012	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	1900000
CY2012	us-gaap	Unrecognized Tax Benefits Period Increase Decrease UnrecognizedTaxBenefitsPeriodIncreaseDecrease	200000
CY2012	us-gaap	Defined Benefit Plan Target Plan Asset Allocations Range Minimum DefinedBenefitPlanTargetPlanAssetAllocationsRangeMinimum	0.60	pure
CY2012	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	3.52
CY2012	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	6800000
CY2012	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.056	pure
CY2012	us-gaap	Defined Benefit Plan Target Plan Asset Allocations Range Maximum DefinedBenefitPlanTargetPlanAssetAllocationsRangeMaximum	0.65	pure
CY2012	us-gaap	Disposal Group Including Discontinued Operation Operating Income Loss DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss	-3900000
CY2012	us-gaap	Gain Loss Related To Litigation Settlement GainLossRelatedToLitigationSettlement	3900000
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.394	pure
CY2012	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	158600000
CY2012	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	46197608	shares
CY2012	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-5300000
CY2012	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	7200000
CY2012	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	18300000
CY2012	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	356453	shares
CY2012	us-gaap	Gain Loss On Sale Of Securities Net GainLossOnSaleOfSecuritiesNet	43200000
CY2012	us-gaap	Gain On Sale Of Investments GainOnSaleOfInvestments	27200000
CY2012	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350	pure
CY2012	us-gaap	Other Comprehensive Income Defined Benefit Plans Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansTaxPortionAttributableToParent	13600000
CY2012	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	-3000000
CY2012	us-gaap	Effect Of Lifo Inventory Liquidation On Income EffectOfLIFOInventoryLiquidationOnIncome	-1100000
CY2012	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P8Y
CY2012	us-gaap	Cost Of Goods Sold CostOfGoodsSold	1287300000
CY2012	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	17000000
CY2012	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	103000000
CY2012	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	311400000
CY2012	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.72
CY2012	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-1100000
CY2012	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	233800000
CY2012	us-gaap	Gross Profit GrossProfit	652000000
CY2012	us-gaap	Trading Securities Description TradingSecuritiesDescription	The company considers all highly liquid investments with maturities greater than 90 days when purchased to be marketable securities.
CY2012	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-253500000
CY2012	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	36700000
CY2012	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	-600000
CY2012	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-86800000
CY2012	us-gaap	Proceeds From Sale Of Available For Sale Securities Equity ProceedsFromSaleOfAvailableForSaleSecuritiesEquity	187600000
CY2012	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	308000000
CY2012	us-gaap	Net Income Loss NetIncomeLoss	158700000
CY2012	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	8800000
CY2012	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	450500000
CY2012	us-gaap	Finite Lived Intangible Asset Useful Life FiniteLivedIntangibleAssetUsefulLife	P16Y
CY2012	us-gaap	Restructuring Reserve Period Increase Decrease RestructuringReservePeriodIncreaseDecrease	-3900000
CY2012	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	71200000
CY2012	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0
CY2012	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	3.49
CY2012	us-gaap	Use Of Estimates UseOfEstimates	<div> <p style="MARGIN-TOP: 12px; MARGIN-BOTTOM: 0px"><font style="FONT-FAMILY: Times New Roman" size="2"><b>Use of estimates</b>. The preparation of financial statements in conformity with accounting principles generally accepted in the United States (U.S.) requires management to make estimates and assumptions that affect the amounts reported in the accompanying financial statements and notes. Actual results could differ from those estimates.</font></p> </div>
CY2012	us-gaap	Increase Decrease In Other Current Assets And Liabilities Net IncreaseDecreaseInOtherCurrentAssetsAndLiabilitiesNet	-36700000
CY2012	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-1200000
CY2012	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	14600000
CY2012	us-gaap	Interest Expense InterestExpense	9200000
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	16.52
CY2012	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	13300000
CY2012	aos	Other Comprehensive Income Loss Minimum Pension Liability Net Adjustment Tax Effect OtherComprehensiveIncomeLossMinimumPensionLiabilityNetAdjustmentTaxEffect	22400000
CY2012	aos	Number Of Reporting Segments NumberOfReportingSegments	2	Segment
CY2012	aos	Amortization Of Advertising Costs AmortizationOfAdvertisingCosts	15800000
CY2012	aos	Cash And Cash Equivalents Were Held By Foreign Subsidiaries CashAndCashEquivalentsWereHeldByForeignSubsidiaries	457100000
CY2012	aos	Disposal Group Including Discontinued Operation Current Assets And Liabilities DisposalGroupIncludingDiscontinuedOperationCurrentAssetsAndLiabilities	-22600000
CY2012	aos	Percentage Match Of Next Five Percent Of Contributions Made By Participating Employees PercentageMatchOfNextFivePercentOfContributionsMadeByParticipatingEmployees	0.50	pure
CY2012	aos	Proceeds From Stock Options Activity ProceedsFromStockOptionsActivity	20500000
CY2012	aos	Net Operating Losses And Tax Credits Additions NetOperatingLossesAndTaxCreditsAdditions	2000000
CY2012	aos	Disposal Group Including Discontinued Operation Noncurrent Assets And Liabilities DisposalGroupIncludingDiscontinuedOperationNoncurrentAssetsAndLiabilities	-900000
CY2012	aos	Medical And Life Insurance Maximum Participant Coverage Age In Years MedicalAndLifeInsuranceMaximumParticipantCoverageAgeInYears	65	Age
CY2012	aos	Product Warranty Period Lower Range ProductWarrantyPeriodLowerRange	1	Y
CY2012	aos	Noncurrent Assets And Liabilities NoncurrentAssetsAndLiabilities	-16800000
CY2012	aos	Net Operating Losses And Tax Credits Deductions NetOperatingLossesAndTaxCreditsDeductions	3700000
CY2012	aos	Increase Decrease In Accounts Receivables IncreaseDecreaseInAccountsReceivables	-57000000
CY2012	aos	Increase Decrease In Total Inventories IncreaseDecreaseInTotalInventories	5000000
CY2012	aos	Percentage Match Of First One Percent Of Contributions Made By Participating Employees PercentageMatchOfFirstOnePercentOfContributionsMadeByParticipatingEmployees	1.00	pure
CY2012	aos	Increase Decrease In Accounts Payables IncreaseDecreaseInAccountsPayables	-26400000
CY2012	aos	Product Warranty Period Upper Range ProductWarrantyPeriodUpperRange	10	Y
CY2012	aos	Maximum Aggregate Product Liability Insurance Coverage MaximumAggregateProductLiabilityInsuranceCoverage	125000000
CY2012	aos	Corporate Income Expense CorporateIncomeExpense	-16400000
CY2012	aos	Contingent Consideration Adjustments ContingentConsiderationAdjustments	3300000
CY2011Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.36
CY2011Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.37
CY2011Q1	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	417400000
CY2011Q1	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	24200000
CY2011Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.88
CY2011Q1	us-gaap	Profit Loss ProfitLoss	41000000
CY2011Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.14
CY2011Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.89
CY2011Q1	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.52
CY2011Q1	us-gaap	Disposal Group Including Discontinued Operation Operating Income Loss DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss	16800000
CY2011Q1	us-gaap	Gross Profit GrossProfit	127000000
CY2011Q1	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.52
CY2012Q1	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	468600000
CY2012Q1	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	47500000
CY2012Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.02
CY2012Q1	us-gaap	Profit Loss ProfitLoss	47500000
CY2012Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.16
CY2012Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.03
CY2012Q1	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	1.03
CY2012Q1	us-gaap	Gross Profit GrossProfit	149100000
CY2012Q1	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	1.02
CY2012Q2	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	484200000
CY2012Q2	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	35000000
CY2012Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.75
CY2012Q2	us-gaap	Profit Loss ProfitLoss	35000000
CY2012Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.16
CY2012Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.76
CY2012Q2	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.76
CY2012Q2	us-gaap	Gross Profit GrossProfit	160500000
CY2012Q2	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.75
CY2011Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.46
CY2011Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.47
CY2011Q2	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	405300000
CY2011Q2	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	28600000
CY2011Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.08
CY2011Q2	us-gaap	Profit Loss ProfitLoss	50300000
CY2011Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.14
CY2011Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.09
CY2011Q2	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.62
CY2011Q2	us-gaap	Disposal Group Including Discontinued Operation Operating Income Loss DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss	21700000
CY2011Q2	us-gaap	Gross Profit GrossProfit	111900000
CY2011Q2	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.62
CY2011Q2	aos	Gain Or Loss On Reimbursement Of Related Costs Previously Incurred GainOrLossOnReimbursementOfRelatedCostsPreviouslyIncurred	11200000
CY2011Q2	aos	Provision For Product Warranty ProvisionForProductWarranty	8200000
CY2011Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	3.33
CY2011Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	3.36
CY2011Q3	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	412000000
CY2011Q3	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	26900000
CY2011Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.91
CY2011Q3	us-gaap	Profit Loss ProfitLoss	182300000
CY2011Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.16
CY2011Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.94
CY2011Q3	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.58
CY2011Q3	us-gaap	Disposal Group Including Discontinued Operation Operating Income Loss DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss	155400000
CY2011Q3	us-gaap	Gross Profit GrossProfit	118700000
CY2011Q3	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.58
CY2012Q3	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	462300000
CY2012Q3	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	37000000
CY2012Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.79
CY2012Q3	us-gaap	Profit Loss ProfitLoss	37000000
CY2012Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.20
CY2012Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.80
CY2012Q3	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.80
CY2012Q3	us-gaap	Gross Profit GrossProfit	156800000
CY2012Q3	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.79
CY2010Q4	aos	Government Incentives GovernmentIncentives	5600000
CY2011Q4	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.01
CY2011Q4	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.01
CY2011Q4	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	475800000
CY2011Q4	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	31500000
CY2011Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.69
CY2011Q4	us-gaap	Profit Loss ProfitLoss	32100000
CY2011Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.16
CY2011Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.69
CY2011Q4	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.68
CY2011Q4	us-gaap	Disposal Group Including Discontinued Operation Operating Income Loss DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss	600000
CY2011Q4	us-gaap	Gross Profit GrossProfit	155000000
CY2011Q4	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.68
CY2012Q4	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.93
CY2012Q4	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	-0.08
CY2012Q4	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	-0.08
CY2012Q4	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	524200000
CY2012Q4	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	43100000
CY2012Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.85
CY2012Q4	us-gaap	Profit Loss ProfitLoss	39200000
CY2012Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.20
CY2012Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.85
CY2012Q4	us-gaap	Disposal Group Including Discontinued Operation Operating Income Loss DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss	-3900000
CY2012Q4	us-gaap	Gross Profit GrossProfit	185600000
CY2012Q4	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.93
CY2012Q4	aos	Gain Or Loss On Reimbursement Of Related Costs Previously Incurred GainOrLossOnReimbursementOfRelatedCostsPreviouslyIncurred	3900000

Files In Submission

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$AOS
A O Smith Corp Stock $aos

2011 Q4 Form 10-K Financial Statement

#000119312513080129 Filed on February 27, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AOS A O Smith Corp Stock $aos

2011 Q4 Form 10-K Financial Statement

#000119312513080129 Filed on February 27, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AOS
A O Smith Corp Stock $aos