XML 130 R115.htm IDEA: XBRL DOCUMENT
v3.20.4

Pension, Other Postretirement Benefits and Savings Plans - Fair Values of Pension Plan Assets (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | ---
United States |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | $ 4,970 | $ 4,780 |
Non-U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 185 | 370 |
Pension Plan | United States |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 4,970 | 4,780 | $ 4,445
Pension Plan | Non-U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 3,041 | 2,740 | 2,464
Pension Plan | Fair Value, Inputs, Level 1, 2 and 3 | United States |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 4,292 | 4,031 |
Pension Plan | Fair Value, Inputs, Level 1, 2 and 3 | Non-U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 2,327 | 2,159 |
Pension Plan | Quoted Prices in Active Markets for Identical Assets (Level 1) | United States |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 122 | 47 |
Pension Plan | Quoted Prices in Active Markets for Identical Assets (Level 1) | Non-U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 194 | 178 |
Pension Plan | Significant Unobservable Inputs (Level 3) | United States |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 3 | 4 |
Pension Plan | Significant Unobservable Inputs (Level 3) | Non-U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 29 | 23 |
Pension Plan | Significant Other Observable Inputs (Level 2) | United States |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 4,167 | 3,980 |
Pension Plan | Significant Other Observable Inputs (Level 2) | Non-U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 2,104 | 1,958 |
Pension Plan | Cash and short term securities | Fair Value, Inputs, Level 1, 2 and 3 | United States |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 122 | 47 |
Pension Plan | Cash and short term securities | Fair Value, Inputs, Level 1, 2 and 3 | Non-U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 46 | 33 |
Pension Plan | Cash and short term securities | Quoted Prices in Active Markets for Identical Assets (Level 1) | United States |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 122 | 47 |
Pension Plan | Cash and short term securities | Quoted Prices in Active Markets for Identical Assets (Level 1) | Non-U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 42 | 29 |
Pension Plan | Cash and short term securities | Significant Other Observable Inputs (Level 2) | Non-U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 4 | 4 |
Pension Plan | Equity Securities, Common and Preferred Stock | Fair Value, Inputs, Level 1, 2 and 3 | Non-U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 24 | 24 |
Pension Plan | Equity Securities, Common and Preferred Stock | Quoted Prices in Active Markets for Identical Assets (Level 1) | Non-U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 24 | 24 |
Pension Plan | Equity Securities, Commingled Funds | Fair Value, Inputs, Level 1, 2 and 3 | Non-U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 19 | 36 |
Pension Plan | Equity Securities, Commingled Funds | Quoted Prices in Active Markets for Identical Assets (Level 1) | Non-U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 19 | 36 |
Pension Plan | Equity Securities, Commingled Funds | Fair Value Measured at Net Asset Value Per Share | United States |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 23 | 9 |
Pension Plan | Equity Securities, Commingled Funds | Fair Value Measured at Net Asset Value Per Share | Non-U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 62 | 69 |
Pension Plan | Equity Securities, Mutual Funds | Fair Value, Inputs, Level 1, 2 and 3 | Non-U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 6 | 5 |
Pension Plan | Equity Securities, Mutual Funds | Quoted Prices in Active Markets for Identical Assets (Level 1) | Non-U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 6 | 5 |
Pension Plan | Equity Securities, Mutual Funds | Fair Value Measured at Net Asset Value Per Share | Non-U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 4 | 11 |
Pension Plan | Debt Securities, Corporate Bonds | Fair Value, Inputs, Level 1, 2 and 3 | United States |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 2,843 | 2,577 |
Pension Plan | Debt Securities, Corporate Bonds | Fair Value, Inputs, Level 1, 2 and 3 | Non-U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 230 | 190 |
Pension Plan | Debt Securities, Corporate Bonds | Quoted Prices in Active Markets for Identical Assets (Level 1) | Non-U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 24 | 10 |
Pension Plan | Debt Securities, Corporate Bonds | Significant Unobservable Inputs (Level 3) | United States |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 1 | 1 |
Pension Plan | Debt Securities, Corporate Bonds | Significant Other Observable Inputs (Level 2) | United States |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 2,842 | 2,576 |
Pension Plan | Debt Securities, Corporate Bonds | Significant Other Observable Inputs (Level 2) | Non-U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 206 | 180 |
Pension Plan | Debt Securities, Government Bonds | Fair Value, Inputs, Level 1, 2 and 3 | United States |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 1,038 | 1,120 |
Pension Plan | Debt Securities, Government Bonds | Fair Value, Inputs, Level 1, 2 and 3 | Non-U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 2,503 | 2,271 |
Pension Plan | Debt Securities, Government Bonds | Quoted Prices in Active Markets for Identical Assets (Level 1) | Non-U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 42 | 60 |
Pension Plan | Debt Securities, Government Bonds | Significant Other Observable Inputs (Level 2) | United States |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 1,038 | 1,120 |
Pension Plan | Debt Securities, Government Bonds | Significant Other Observable Inputs (Level 2) | Non-U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 2,461 | 2,211 |
Pension Plan | Debt Securities, Repurchase Agreements | Fair Value, Inputs, Level 1, 2 and 3 | Non-U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | (650) | (511) |
Pension Plan | Debt Securities, Repurchase Agreements | Significant Other Observable Inputs (Level 2) | Non-U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | (650) | (511) |
Pension Plan | Debt Securities, Asset-backed Securities | Fair Value, Inputs, Level 1, 2 and 3 | United States |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 280 | 283 |
Pension Plan | Debt Securities, Asset-backed Securities | Fair Value, Inputs, Level 1, 2 and 3 | Non-U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 76 | 74 |
Pension Plan | Debt Securities, Asset-backed Securities | Quoted Prices in Active Markets for Identical Assets (Level 1) | Non-U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 8 | 5 |
Pension Plan | Debt Securities, Asset-backed Securities | Significant Unobservable Inputs (Level 3) | United States |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value |  | 1 |
Pension Plan | Debt Securities, Asset-backed Securities | Significant Other Observable Inputs (Level 2) | United States |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 280 | 282 |
Pension Plan | Debt Securities, Asset-backed Securities | Significant Other Observable Inputs (Level 2) | Non-U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 68 | 69 |
Pension Plan | Debt Securities, Commingled Funds | Fair Value, Inputs, Level 1, 2 and 3 | Non-U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 20 |  |
Pension Plan | Debt Securities, Commingled Funds | Quoted Prices in Active Markets for Identical Assets (Level 1) | Non-U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 20 |  |
Pension Plan | Debt Securities, Commingled Funds | Fair Value Measured at Net Asset Value Per Share | United States |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 295 | 310 |
Pension Plan | Debt Securities, Commingled Funds | Fair Value Measured at Net Asset Value Per Share | Non-U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 665 | 604 |
Pension Plan | Debt Securities, Mutual Funds | Fair Value, Inputs, Level 1, 2 and 3 | Non-U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 19 | 19 |
Pension Plan | Debt Securities, Mutual Funds | Quoted Prices in Active Markets for Identical Assets (Level 1) | Non-U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 9 | 9 |
Pension Plan | Debt Securities, Mutual Funds | Significant Other Observable Inputs (Level 2) | Non-U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 10 | 10 |
Pension Plan | Debt Securities, Mutual Funds | Fair Value Measured at Net Asset Value Per Share | United States |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 148 | 141 |
Pension Plan | Debt Securities, Mutual Funds | Fair Value Measured at Net Asset Value Per Share | Non-U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 81 | 7 |
Pension Plan | Alternatives, Insurance Contracts | Fair Value, Inputs, Level 1, 2 and 3 | United States |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 2 | 2 |
Pension Plan | Alternatives, Insurance Contracts | Fair Value, Inputs, Level 1, 2 and 3 | Non-U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 28 | 22 |
Pension Plan | Alternatives, Insurance Contracts | Significant Unobservable Inputs (Level 3) | United States |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 2 | 2 |
Pension Plan | Alternatives, Insurance Contracts | Significant Unobservable Inputs (Level 3) | Non-U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 28 | 22 | $ 19
Pension Plan | Alternatives, Other Investments | Fair Value, Inputs, Level 1, 2 and 3 | United States |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 7 | 2 |
Pension Plan | Alternatives, Other Investments | Fair Value, Inputs, Level 1, 2 and 3 | Non-U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 6 | (4) |
Pension Plan | Alternatives, Other Investments | Significant Unobservable Inputs (Level 3) | Non-U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 1 | 1 |
Pension Plan | Alternatives, Other Investments | Significant Other Observable Inputs (Level 2) | United States |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 7 | 2 |
Pension Plan | Alternatives, Other Investments | Significant Other Observable Inputs (Level 2) | Non-U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 5 | (5) |
Pension Plan | Equity Securities, Partnership Interests | Fair Value Measured at Net Asset Value Per Share | United States |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 166 | 267 |
Pension Plan | Debt Securities, Partnership Interests | Fair Value Measured at Net Asset Value Per Share | United States |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 102 |  |
Pension Plan | Short Term Securities, Commingled Funds | Fair Value Measured at Net Asset Value Per Share | United States |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 22 | 67 |
Pension Plan | Short Term Securities, Commingled Funds | Fair Value Measured at Net Asset Value Per Share | Non-U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 3 | 4 |
Pension Plan | Alternatives, Commingled Funds | Fair Value Measured at Net Asset Value Per Share | Non-U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 6 | 6 |
Pension Plan | Investments Before Other Plan Assets | United States |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 5,048 | 4,825 |
Pension Plan | Investments Before Other Plan Assets | Non-U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | 3,148 | 2,860 |
Pension Plan | Other Assets | United States |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | (78) | (45) |
Pension Plan | Other Assets | Non-U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, fair value | $ (107) | $ (120) |

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlanDisclosureLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=118257860&loc=d3e4179-114921 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(02) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 7: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_RetirementPlanSponsorLocationAxis=country_US
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanSponsorLocationAxis=us-gaap_ForeignPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=us-gaap_PensionPlansDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel12And3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_DefinedBenefitPlanCashAndCashEquivalentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=gt_DefinedBenefitPlanEquitySecuritiesCommonandPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=gt_DefinedBenefitPlanEquitySecuritiesCommingledFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_EquityFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_USGovernmentAgenciesDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_RepurchaseAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_AssetBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=gt_DefinedBenefitPlanDebtSecuritiesCommingledFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=gt_DebtSecuritiesMutualFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=gt_DefinedBenefitPlanAlternativesInsuranceContractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=gt_DefinedBenefitPlanAlternativesOtherInvestmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=gt_DefinedBenefitPlanEquitySecuritiesPartnershipInterestsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=gt_DefinedBenefitPlanDebtSecuritiesPartnershipInterestsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=gt_DefinedBenefitPlanShortTermSecuritiesCommingledFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=gt_DefinedBenefitPlanAlternativesCommingledFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=gt_DefinedBenefitPlanInvestmentsBeforeOtherPlanAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_OtherAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |