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Financing Arrangements and Derivative Financial Instruments Debt Maturities (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Debt Instrument [Line Items]  
2015 $ 178us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
2016 454us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
2017 407us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
2018 188us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
2019 1,925us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive
U.S.  
Debt Instrument [Line Items]  
2015 6us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
/ us-gaap_StatementGeographicalAxis
= country_US
2016 6us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
/ us-gaap_StatementGeographicalAxis
= country_US
2017 5us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
/ us-gaap_StatementGeographicalAxis
= country_US
2018 3us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
/ us-gaap_StatementGeographicalAxis
= country_US
2019 1,196us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive
/ us-gaap_StatementGeographicalAxis
= country_US
Foreign  
Debt Instrument [Line Items]  
2015 172us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
/ us-gaap_StatementGeographicalAxis
= gt_InternationalMember
2016 448us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
/ us-gaap_StatementGeographicalAxis
= gt_InternationalMember
2017 402us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
/ us-gaap_StatementGeographicalAxis
= gt_InternationalMember
2018 185us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
/ us-gaap_StatementGeographicalAxis
= gt_InternationalMember
2019 $ 729us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive
/ us-gaap_StatementGeographicalAxis
= gt_InternationalMember