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Employee Benefit And Retirement Plans (Narrative) (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]      
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax $ (511,700,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax $ 483,300,000us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax $ 621,100,000us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Gains (Losses), before Tax (120,500,000)us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax 183,200,000us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax  
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized From AOCI in Next Fiscal Year, Pre-Tax 22,800,000nwl_PensionAndOtherPostretirementBenefitPlansAmountsThatWillBeAmortizedFromAociInNextFiscalYearPreTax    
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year 14,900,000us-gaap_DefinedBenefitPlanAmountToBeAmortizedFromAccumulatedOtherComprehensiveIncomeLossNextFiscalYear    
Actuarial Loss on adoption of new mortality tables 111,900,000nwl_ActuarialLossonadoptionofnewmortalitytables    
Defined Contribution Plan, Employer Discretionary Contribution Amount 15,800,000us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount 16,700,000us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount 19,000,000us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Defined Contribution Benefit Arrangement, Liability at Period End 16,500,000nwl_DefinedContributionBenefitArrangementLiabilityAtPeriodEnd 17,200,000nwl_DefinedContributionBenefitArrangementLiabilityAtPeriodEnd  
Benefit obligation associated with employees offered the one-time lump sum election 200,000,000nwl_Benefitobligationassociatedwithemployeesofferedtheonetimelumpsumelection    
Payments for Postemployment Benefits 98,600,000nwl_Benefitpaymentsrelatingtoonetimelumpsumoffer    
Defined Benefit Plan, Recognized Net Loss Due to Settlements 65,400,000us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1 0us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1 0us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1
Deferred Compensation Liability, Current and Noncurrent 49,100,000us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent 55,500,000us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent  
Deferred Compensation Plan Assets 54,500,000us-gaap_DeferredCompensationPlanAssets 52,300,000us-gaap_DeferredCompensationPlanAssets  
OTHER ASSETS 262,200,000us-gaap_OtherAssetsNoncurrent 268,900,000us-gaap_OtherAssetsNoncurrent  
Defined Contribution Plan, Cost Recognized 13,600,000us-gaap_DefinedContributionPlanCostRecognized 13,900,000us-gaap_DefinedContributionPlanCostRecognized 14,200,000us-gaap_DefinedContributionPlanCostRecognized
Primary U.S. Pension Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year 70,000,000us-gaap_DefinedBenefitPlansEstimatedFutureEmployerContributionsInNextFiscalYear
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= nwl_PrimaryU.S.PensionPlanMember		    
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Gains (Losses), before Tax (589,900,000)us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= nwl_PrimaryU.S.PensionPlanMember		    
Defined Benefit Plan - Amortization Period of unrecognized actuarial losses 23nwl_DefinedBenefitPlanAmortizationPeriodofunrecognizedactuariallosses
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= nwl_PrimaryU.S.PensionPlanMember		    
International [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year 15,700,000us-gaap_DefinedBenefitPlansEstimatedFutureEmployerContributionsInNextFiscalYear
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember		    
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Gains (Losses), before Tax (140,800,000)us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember		 (124,500,000)us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember		  
Defined Benefit Plan, Benefit Obligation 671,700,000us-gaap_DefinedBenefitPlanBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember		 615,400,000us-gaap_DefinedBenefitPlanBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember		 602,600,000us-gaap_DefinedBenefitPlanBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember
Pension Plans, Defined Benefit [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Expected Future Benefit Payments in Year One 83,300,000us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_PensionPlansDefinedBenefitMember		 [1]    
Defined Benefit Plan, Expected Future Benefit Payments in Year Two 81,600,000us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_PensionPlansDefinedBenefitMember		 [1]    
Defined Benefit Plan, Expected Future Benefit Payments in Year Three 82,300,000us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_PensionPlansDefinedBenefitMember		 [1]    
Defined Benefit Plan, Expected Future Benefit Payments in Year Four 83,500,000us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_PensionPlansDefinedBenefitMember		 [1]    
Defined Benefit Plan, Expected Future Benefit Payments in Year Five 85,100,000us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_PensionPlansDefinedBenefitMember		 [1]    
Defined Benefit Plan, Expected Future Benefit Payments in Five Fiscal Years Thereafter 452,600,000us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_PensionPlansDefinedBenefitMember		 [1]    
United States Pension Plan of US Entity [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year 9,800,000us-gaap_DefinedBenefitPlansEstimatedFutureEmployerContributionsInNextFiscalYear
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember		    
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Gains (Losses), before Tax (654,400,000)us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember		 (621,400,000)us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember		  
Defined Benefit Plan, Benefit Obligation 1,060,700,000us-gaap_DefinedBenefitPlanBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember		 1,034,000,000us-gaap_DefinedBenefitPlanBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember		 1,170,500,000us-gaap_DefinedBenefitPlanBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember
Supplemental Executive Retirement Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Number of Employees 310nwl_NumberOfEmployeesLifeInsurance
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= nwl_SupplementalExecutiveRetirementPlanMember		    
Net Death Benefits From Life Insurance Policies, Amount 275,400,000nwl_NetDeathBenefitsFromLifeInsurancePoliciesAmount
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= nwl_SupplementalExecutiveRetirementPlanMember		    
Cash Surrender Value of Life Insurance 106,000,000us-gaap_CashSurrenderValueOfLifeInsurance
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= nwl_SupplementalExecutiveRetirementPlanMember		 102,500,000us-gaap_CashSurrenderValueOfLifeInsurance
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= nwl_SupplementalExecutiveRetirementPlanMember		  
Defined Benefit Plan, Benefit Obligation 139,300,000us-gaap_DefinedBenefitPlanBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= nwl_SupplementalExecutiveRetirementPlanMember		 110,200,000us-gaap_DefinedBenefitPlanBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= nwl_SupplementalExecutiveRetirementPlanMember		  
Other Postretirement Benefit Plans, Defined Benefit [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Gains (Losses), before Tax 16,900,000us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember		 (800,000)us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember		  
Defined Benefit Plan, Benefit Obligation 88,100,000us-gaap_DefinedBenefitPlanBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember		 111,800,000us-gaap_DefinedBenefitPlanBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember		 158,800,000us-gaap_DefinedBenefitPlanBenefitObligation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember
Defined Benefit Plan, Expected Future Benefit Payments in Year One 6,800,000us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember		    
Defined Benefit Plan, Expected Future Benefit Payments in Year Two 6,700,000us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember		    
Defined Benefit Plan, Expected Future Benefit Payments in Year Three 6,600,000us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember		    
Defined Benefit Plan, Expected Future Benefit Payments in Year Four 6,500,000us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember		    
Defined Benefit Plan, Expected Future Benefit Payments in Year Five 6,500,000us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember		    
Defined Benefit Plan, Expected Future Benefit Payments in Five Fiscal Years Thereafter 32,000,000us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember		    
Other Assets [Member]      
Defined Benefit Plan Disclosure [Line Items]      
OTHER ASSETS 13,100,000us-gaap_OtherAssetsNoncurrent
/ nwl_FairValueByAssetAndLiabilityClassAxis
= us-gaap_OtherAssetsMember		    
Other Assets [Member] | Supplemental Executive Retirement Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
OTHER ASSETS $ 8,800,000us-gaap_OtherAssetsNoncurrent
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= nwl_SupplementalExecutiveRetirementPlanMember
/ nwl_FairValueByAssetAndLiabilityClassAxis
= us-gaap_OtherAssetsMember		 $ 10,300,000us-gaap_OtherAssetsNoncurrent
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= nwl_SupplementalExecutiveRetirementPlanMember
/ nwl_FairValueByAssetAndLiabilityClassAxis
= us-gaap_OtherAssetsMember		  
[1] Certain pension benefit payments will be funded by plan assets.