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Postretirement Benefit Plans (Details 10) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Employer contributions to defined postretirement benefit plans    
Company contributions $ 21.1us-gaap_DefinedBenefitPlanContributionsByEmployer $ 120.7us-gaap_DefinedBenefitPlanContributionsByEmployer
VEBA [Member]    
Employer contributions to defined postretirement benefit plans    
Company contributions 20.0us-gaap_DefinedBenefitPlanContributionsByEmployer
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= tkr_VoluntaryEmployeeBenefitAssociationMember		 0us-gaap_DefinedBenefitPlanContributionsByEmployer
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= tkr_VoluntaryEmployeeBenefitAssociationMember
Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year $ 0us-gaap_DefinedBenefitPlansEstimatedFutureEmployerContributionsInCurrentFiscalYear
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= tkr_VoluntaryEmployeeBenefitAssociationMember