Commitments and Contingencies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011
Contingencies And Commitments [Line Items]
Receivables balance individually evaluated for impairment	$ 253	$ 350
Unfunded financing commitments	18,083
Reserve for future potential losses for financing commitments	0
American Airlines [Member]
Contingencies And Commitments [Line Items]
Receivables balance individually evaluated for impairment	$ 253	$ 350

The balance of financing receivables that were individually evaluated for impairment.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 11B

-Subparagraph (h)

-URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524

Name:	us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant