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v3.20.4

Leases - Additional Information (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2020 USD ($)
Operating Leased Assets [Line Items] |
Lease not yet commenced, amount | $ 23
Operating and finance lease commencement year | 2021
Operating and finance lease commencement year | 2022
Minimum |
Operating Leased Assets [Line Items] |
Operating and finance lease, term of contract | 7 years
Maximum |
Operating Leased Assets [Line Items] |
Operating and finance lease, term of contract | 15 years

X
- Definition Lessee operating and finance lease commencement year. + References No definition available. + Details
Name: | gt_LesseeOperatingAndFinanceLeaseCommencementYear
Namespace Prefix: | gt_
Data Type: | xbrli:gYearItemType
Balance Type: | na
Period Type: | duration

X
- Definition Lessee operating and finance lease commencement year. + References No definition available. + Details
Name: | gt_LesseeOperatingAndFinanceLeaseCommencementYear1
Namespace Prefix: | gt_
Data Type: | xbrli:gYearItemType
Balance Type: | na
Period Type: | duration

X
- Definition Lessee operating and finance lease not yet commenced assumption and judgment value of underlying asset amount. + References No definition available. + Details
Name: | gt_LesseeOperatingAndFinanceLeaseNotYetCommencedAssumptionAndJudgmentValueOfUnderlyingAssetAmount
Namespace Prefix: | gt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Lessee operating and finance lease term of contract. + References No definition available. + Details
Name: | gt_LesseeOperatingAndFinanceLeaseTermOfContract
Namespace Prefix: | gt_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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_OperatingLeasedAssetsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |