Accumulated Other Comprehensive Loss - Components of AOCI (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
AOCI tax, attributable to parent [Roll Forward]
Beginning balance, tax		$ (1,601)			$ (1,601)
Other comprehensive income before reclassifications, tax					0
Amounts reclassified from AOCI, tax					(10)
Net current-period other comprehensive income (loss), tax					(10)
Ending balance, tax	$ (1,611)				(1,611)
AOCI attributable to parent, net of tax [Roll Forward]
Beginning balance, net of tax		(4,585)			(4,585)
Other comprehensive income before reclassifications, net of tax					1
Amounts reclassified from AOCI, net of tax					34
Total other comprehensive income, net of tax	17	18	$ 26	$ 26	35	$ 52
Ending balance, net of tax	(4,550)				(4,550)
Pension, Retiree Medical and Other Postretirement Benefits
AOCI attributable to parent, before tax [Roll Forward]
Beginning balance, before tax		(2,978)			(2,978)
Other comprehensive income before reclassifications, before tax					0
Amounts reclassified from AOCI, before tax					44
Net current-period other comprehensive income (loss), before tax					44
Ending balance, before tax	(2,934)				(2,934)
Unrealized Gain (Loss) on Investments
AOCI attributable to parent, before tax [Roll Forward]
Beginning balance, before tax		(6)			(6)
Other comprehensive income before reclassifications, before tax					1
Amounts reclassified from AOCI, before tax					0
Net current-period other comprehensive income (loss), before tax					1
Ending balance, before tax	(5)				(5)
American Airlines, Inc.
AOCI tax, attributable to parent [Roll Forward]
Beginning balance, tax		(1,710)			(1,710)
Other comprehensive income before reclassifications, tax					0
Amounts reclassified from AOCI, tax					(10)
Net current-period other comprehensive income (loss), tax					(10)
Ending balance, tax	(1,720)				(1,720)
AOCI attributable to parent, net of tax [Roll Forward]
Beginning balance, net of tax		(4,690)			(4,690)
Other comprehensive income before reclassifications, net of tax					1
Amounts reclassified from AOCI, net of tax					34
Total other comprehensive income, net of tax	17	18	$ 26	$ 26	35	$ 52
Ending balance, net of tax	(4,655)				(4,655)
American Airlines, Inc. | Pension, Retiree Medical and Other Postretirement Benefits
AOCI attributable to parent, before tax [Roll Forward]
Beginning balance, before tax		(2,974)			(2,974)
Other comprehensive income before reclassifications, before tax					0
Amounts reclassified from AOCI, before tax					44
Net current-period other comprehensive income (loss), before tax					44
Ending balance, before tax	(2,930)				(2,930)
American Airlines, Inc. | Unrealized Gain (Loss) on Investments
AOCI attributable to parent, before tax [Roll Forward]
Beginning balance, before tax		$ (6)			(6)
Other comprehensive income before reclassifications, before tax					1
Amounts reclassified from AOCI, before tax					0
Net current-period other comprehensive income (loss), before tax					1
Ending balance, before tax	$ (5)				$ (5)