Transactions with Related Parties (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Unsecured Debt [Member] \| 6.125% Senior Notes [Member]
Related Party Transaction [Line Items]
Debt instrument, stated interest rate percentage	6.125%	4.63%
American Airlines, Inc. [Member]
Related Party Transaction [Line Items]
Net receivables (payables) to related parties	$ 10,525	$ 8,822
American Airlines, Inc. [Member] \| AAG [Member]
Related Party Transaction [Line Items]
Net receivables (payables) to related parties	12,655	10,968
American Airlines, Inc. [Member] \| AAG's wholly-owned subsidiaries [Member]
Related Party Transaction [Line Items]
Net receivables (payables) to related parties	$ (2,130)	$ (2,146)

Contractual interest rate for funds borrowed, under the debt agreement.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(k)(1))
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (d)
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