Financing Arrangements and Derivative Financial Instruments Credit Arrangements - Narrative (Details) $ in Millions	Sep. 30, 2015 USD ($)
Debt Instrument [Line Items]
Credit Arrangements	$ 8,829
Credit Arrangements, Unused Amount	$ 2,564
Debt, Percentage Bearing Variable Interest, Percentage Rate	38.00%
Variable rate credit arrangements [Member]
Debt Instrument [Line Items]
Weighted average interest rate	5.73%
Short-term Debt
Debt Instrument [Line Items]
Credit Arrangements	$ 454
Credit Arrangements, Unused Amount	413
Long-term Debt [Member]
Debt Instrument [Line Items]
Credit Arrangements	8,375
Credit Arrangements, Unused Amount	$ 2,151

Credit Arrangements.

No definition available.

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Namespace Prefix:	gt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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

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Period Type:	duration

- Definition

Amount of unused borrowing capacity under the long-term financing arrangement that is available to the entity as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

Weighted average interest rate of debt outstanding.

+ References

No definition available.

+ Details

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- Definition

The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a rate subject to change from time to time.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Details

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- Details

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- Details

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