Accumulated Other Comprehensive Loss - Components of AOCI (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
AOCI tax, attributable to parent [Roll Forward]
Beginning balance, tax	$ (1,601)
Other comprehensive income (loss) before reclassifications, tax	(1)
Amounts reclassified from AOCI, tax	(5)
Net current-period other comprehensive income (loss), tax	(6)
Ending balance, tax	(1,607)
AOCI attributable to parent, net of tax [Roll Forward]
Beginning balance, net of tax	(4,585)
Other comprehensive income (loss) before reclassifications, net of tax	1
Amounts reclassified from AOCI, net of tax	17
Total other comprehensive income, net of tax	18	$ 26
Ending balance, net of tax	(4,567)
Pension, Retiree Medical and Other Postretirement Benefits
AOCI attributable to parent, before tax [Roll Forward]
Beginning balance, before tax	(2,978)
Other comprehensive income (loss) before reclassifications, before tax	0
Amounts reclassified from AOCI, before tax	22
Net current-period other comprehensive income (loss), before tax	22
Ending balance, before tax	(2,956)
Unrealized Gain (Loss) on Investments
AOCI attributable to parent, before tax [Roll Forward]
Beginning balance, before tax	(6)
Other comprehensive income (loss) before reclassifications, before tax	2
Amounts reclassified from AOCI, before tax	0
Net current-period other comprehensive income (loss), before tax	2
Ending balance, before tax	(4)
American Airlines, Inc.
AOCI tax, attributable to parent [Roll Forward]
Beginning balance, tax	(1,710)
Other comprehensive income (loss) before reclassifications, tax	(1)
Amounts reclassified from AOCI, tax	(5)
Net current-period other comprehensive income (loss), tax	(6)
Ending balance, tax	(1,716)
AOCI attributable to parent, net of tax [Roll Forward]
Beginning balance, net of tax	(4,690)
Other comprehensive income (loss) before reclassifications, net of tax	1
Amounts reclassified from AOCI, net of tax	17
Total other comprehensive income, net of tax	18	$ 26
Ending balance, net of tax	(4,672)
American Airlines, Inc. | Pension, Retiree Medical and Other Postretirement Benefits
AOCI attributable to parent, before tax [Roll Forward]
Beginning balance, before tax	(2,974)
Other comprehensive income (loss) before reclassifications, before tax	0
Amounts reclassified from AOCI, before tax	22
Net current-period other comprehensive income (loss), before tax	22
Ending balance, before tax	(2,952)
American Airlines, Inc. | Unrealized Gain (Loss) on Investments
AOCI attributable to parent, before tax [Roll Forward]
Beginning balance, before tax	(6)
Other comprehensive income (loss) before reclassifications, before tax	2
Amounts reclassified from AOCI, before tax	0
Net current-period other comprehensive income (loss), before tax	2
Ending balance, before tax	$ (4)