Debt - Schedule of EETC And Remaining Escrowed Proceeds (Details) - American Airlines, Inc. - Enhanced Equipment Trust Certificates (EETC) $ in Millions	Sep. 30, 2020 USD ($)
2019-1 Aircraft EETCs Series AA
Debt Instrument [Line Items]
Aggregate principal issued	$ 579
Remaining escrowed proceeds	$ 89
Fixed interest rate per annum	3.15%
2019-1 Aircraft EETCs Series A
Debt Instrument [Line Items]
Aggregate principal issued	$ 289
Remaining escrowed proceeds	$ 44
Fixed interest rate per annum	3.50%
2019-1 Aircraft EETCs Series B
Debt Instrument [Line Items]
Aggregate principal issued	$ 229
Remaining escrowed proceeds	$ 35
Fixed interest rate per annum	3.85%

Face (par) amount of debt instrument at time of issuance.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant