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Stock-Based Compensation (Summary Of Changes Of Restricted Stock And Restricted Stock Units) (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]      
Outstanding Shares, Beginning of Period 4.2us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber    
Granted, Shares 1.3us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod    
Vested, Shares (1.2)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod    
Forfeited, Shares (0.6)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod    
Outstanding Shares, End of Period 3.7us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber 4.2us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber  
Share Based Compensation, Equity Instruments Other Than Options, Expected To Vest 3.6nwl_ShareBasedCompensationEquityInstrumentsOtherThanOptionsExpectedToVest    
Share Based Compensation, Equity Instruments Other Than Options, Expected To Vest, Weighted Avg Grant Date Fair Value $ 25nwl_ShareBasedCompensationEquityInstrumentsOtherThanOptionsExpectedToVestWeightedAvgGrantDateFairValue    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Total Fair Value $ 41.0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue $ 76.9us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue $ 41.1us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue
Weighted-Average Grant date Fair Value, Outstanding, Beginning of Period $ 22us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue    
Granted, Weighted-Average Grant Date Fair Value $ 33us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue $ 25us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue $ 19us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Vested, Weighted-Average Grant Date Fair Value $ 21us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue    
Forfeited, Weighted-Average Grant Date Fair Value $ 25us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue    
Weighted-Average Grant date Fair Value, Outstanding, End of Period $ 26us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue $ 22us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue  
Stock Price Based RSU [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock Price Based Restricted Stock Unit Awards, Granted During Period, Number   0.2nwl_StockPriceBasedRestrictedStockUnitAwardsGrantedDuringPeriodNumber
/ us-gaap_AwardTypeAxis
= nwl_StockPriceBasedRsuMember
0.1nwl_StockPriceBasedRestrictedStockUnitAwardsGrantedDuringPeriodNumber
/ us-gaap_AwardTypeAxis
= nwl_StockPriceBasedRsuMember
Share Based Compensation Arrangement By Share Based Payment Award Stock Price Performance Share Unit Award Number Vested 0.1nwl_ShareBasedCompensationArrangementByShareBasedPaymentAwardStockPricePerformanceShareUnitAwardNumberVested
/ us-gaap_AwardTypeAxis
= nwl_StockPriceBasedRsuMember
0.7nwl_ShareBasedCompensationArrangementByShareBasedPaymentAwardStockPricePerformanceShareUnitAwardNumberVested
/ us-gaap_AwardTypeAxis
= nwl_StockPriceBasedRsuMember
 
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]      
Stock Price Based Restricted Stock Unit Awards, Outstanding At Period End 0.2nwl_StockPriceBasedRestrictedStockUnitAwardsOutstandingAtPeriodEnd
/ us-gaap_AwardTypeAxis
= nwl_StockPriceBasedRsuMember
   
Stock Price Based Restricted Stock Unit Awards, Outstanding At Period End, Market Condition Met 0.2nwl_StockPriceBasedRestrictedStockUnitAwardsOutstandingAtPeriodEndMarketConditionMet
/ us-gaap_AwardTypeAxis
= nwl_StockPriceBasedRsuMember