Revenue Recognition - Significant Categories of Reported Operating Revenues (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Revenue from External Customer [Line Items]
Total operating revenues	$ 12,551	$ 12,570
American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	12,549	12,569
Passenger
Revenue from External Customer [Line Items]
Total operating revenues	11,391	11,458
Passenger | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	11,391	11,458
Passenger travel
Revenue from External Customer [Line Items]
Total operating revenues	10,475	10,582
Passenger travel | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	10,475	10,582
Loyalty revenue - travel
Revenue from External Customer [Line Items]
Total operating revenues	916	876
Loyalty revenue - travel | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	916	876
Cargo
Revenue from External Customer [Line Items]
Total operating revenues	189	187
Cargo | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	189	187
Other
Revenue from External Customer [Line Items]
Total operating revenues	971	925
Other | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	969	924
Loyalty revenue - marketing services
Revenue from External Customer [Line Items]
Total operating revenues	823	786
Loyalty revenue - marketing services | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	823	786
Other revenue
Revenue from External Customer [Line Items]
Total operating revenues	148	139
Other revenue | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	$ 146	$ 138