Merger and Related Matters - Schedule of Calculation of Fair Value of Consideration Transferred (Detail) $ / shares in Units, shares in Millions, $ in Millions	Dec. 09, 2013 USD ($) Ratio $ / shares shares
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Exchange ratio \| Ratio	1.0
Price per share \| $ / shares	$ 22.55
Fair value of AAG equity awards issued in exchange for outstanding US Airways Group equity awards	$ 141
American Airlines, Inc. [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Exchange ratio \| Ratio	1
Price per share \| $ / shares	$ 22.55
US Airways Group [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Outstanding shares of US Airways Group Common Stock at December 9, 2013 exchanged \| shares	197.4
Exchange ratio \| Ratio	1.0
Assumed shares of AAG Common Stock \| shares	197.4
Price per share \| $ / shares	$ 22.55
Fair value of AAG Common Stock issued	$ 4,451
Fair value of AAG equity awards issued in exchange for outstanding US Airways Group equity awards	141
Total purchase price	$ 4,592
US Airways Group [Member] \| American Airlines, Inc. [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Outstanding shares of US Airways Group Common Stock at December 9, 2013 exchanged \| shares	197.4
Exchange ratio \| Ratio	1.0
Assumed shares of AAG Common Stock \| shares	197.4
Price per share \| $ / shares	$ 22.55
Fair value of AAG Common Stock issued	$ 4,451
Fair value of AAG equity awards issued in exchange for outstanding US Airways Group equity awards	141
Total purchase price	$ 4,592

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Number of shares of equity interests issued or issuable to acquire entity.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)(4)
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

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-Name Accounting Standards Codification
-Topic 805
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-Section 30
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477

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Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination.

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