Weighted average interest rate of debt outstanding.

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- Definition

Amount of obligation to return cash collateral under master netting arrangements offset against derivative assets.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 45

-Paragraph 5

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-Topic 210

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-Section 50

-Paragraph 3

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Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 20

-Section 50

-Paragraph 3

-Subparagraph (a)

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

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-Paragraph 4B

-Subparagraph (a),(c)

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-Topic 210

-SubTopic 20

-Section 55

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- Definition

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4A

-Subparagraph (b)

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-Topic 815

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-Paragraph 4C

-Subparagraph (a),(c),(d),(e)

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- Definition

The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

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-Paragraph 4C

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- Definition

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

No definition available.

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- Definition

The cash inflow provided by derivative instruments during the period, which are classified as investing activities, excluding those designated as hedging instruments.

+ References

No definition available.

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Risk Management and Financial Instruments - Additional Information (Detail) (USD $)	12 Months Ended			3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2014
Derivative [Line Items]
Amount of gain (loss) recognized in condensed consolidated statements of operations	$ 16,000,000	$ (12,000,000)	$ 4,000,000
Fuel derivatives, gross asset		109,000,000
Cash collateral posted or received		0
Principal amount of long-term variable rate debt	6,500,000,000
Weighted average effective interest rate on variable rate debt	3.30%us-gaap_DebtWeightedAverageInterestRate
Scenario, Forecast [Member]
Derivative [Line Items]
Amount of gain (loss) recognized in OCI on derivative	9,000,000
American Airlines, Inc. [Member]
Derivative [Line Items]
Amount of gain (loss) recognized in condensed consolidated statements of operations	16,000,000	(12,000,000)	4,000,000
Fuel derivatives, gross asset		109,000,000
Cash collateral posted or received		0
Principal amount of long-term variable rate debt	3,900,000,000
Weighted average effective interest rate on variable rate debt	3.60%
American Airlines, Inc. [Member] \| Scenario, Forecast [Member]
Derivative [Line Items]
Amount of gain (loss) recognized in OCI on derivative	9,000,000
Fuel Hedging Contracts [Member]
Derivative [Line Items]
Proceeds from sale of derivative instrument				71,000,000
Amount of gain (loss) recognized in OCI on derivative				25,000,000
Fuel Hedging Contracts [Member] \| American Airlines, Inc. [Member]
Derivative [Line Items]
Proceeds from sale of derivative instrument				71,000,000
Amount of gain (loss) recognized in OCI on derivative				$ 25,000,000