Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Loss (AOCI) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
AOCI tax, attributable to parent [Roll Forward]
Beginning balance, tax	$ (1,204)	$ (865)
Other comprehensive income (loss) before reclassifications, tax	(365)	(293)
Amounts reclassified from AOCI, tax	(32)	(46)
Net current-period other comprehensive income (loss), tax	(397)	(339)
Ending balance, tax	(1,601)	(1,204)	$ (865)
AOCI attributable to parent, net of tax [Roll Forward]
Beginning balance, net of tax	(5,942)	(7,103)
Other comprehensive income (loss) before reclassifications, net of tax	1,249	1,004
Amounts reclassified from AOCI, net of tax	108	157
Total other comprehensive income (loss), net of tax	1,357	1,161	(772)
Ending balance, net of tax	(4,585)	(5,942)	(7,103)
Pension, Retiree Medical and Other Postretirement Benefits
AOCI attributable to parent, before tax [Roll Forward]
Beginning balance, before tax	(4,736)	(6,236)
Other comprehensive income (loss) before reclassifications, before tax	1,618	1,297
Amounts reclassified from AOCI, before tax	140	203
Net current-period other comprehensive income (loss), before tax	1,758	1,500
Ending balance, before tax	(2,978)	(4,736)	(6,236)
Unrealized Loss on Investments
AOCI attributable to parent, before tax [Roll Forward]
Beginning balance, before tax	(2)	(2)
Other comprehensive income (loss) before reclassifications, before tax	(4)	0
Amounts reclassified from AOCI, before tax	0	0
Net current-period other comprehensive income (loss), before tax	(4)	0
Ending balance, before tax	(6)	(2)	(2)
American Airlines, Inc.
AOCI tax, attributable to parent [Roll Forward]
Beginning balance, tax	(1,315)	(977)
Other comprehensive income (loss) before reclassifications, tax	(363)	(292)
Amounts reclassified from AOCI, tax	(32)	(46)
Net current-period other comprehensive income (loss), tax	(395)	(338)
Ending balance, tax	(1,710)	(1,315)	(977)
AOCI attributable to parent, net of tax [Roll Forward]
Beginning balance, net of tax	(6,041)	(7,194)
Other comprehensive income (loss) before reclassifications, net of tax	1,243	997
Amounts reclassified from AOCI, net of tax	108	156
Total other comprehensive income (loss), net of tax	1,351	1,153	(771)
Ending balance, net of tax	(4,690)	(6,041)	(7,194)
American Airlines, Inc. | Pension, Retiree Medical and Other Postretirement Benefits
AOCI attributable to parent, before tax [Roll Forward]
Beginning balance, before tax	(4,724)	(6,215)
Other comprehensive income (loss) before reclassifications, before tax	1,610	1,289
Amounts reclassified from AOCI, before tax	140	202
Net current-period other comprehensive income (loss), before tax	1,750	1,491
Ending balance, before tax	(2,974)	(4,724)	(6,215)
American Airlines, Inc. | Unrealized Loss on Investments
AOCI attributable to parent, before tax [Roll Forward]
Beginning balance, before tax	(2)	(2)
Other comprehensive income (loss) before reclassifications, before tax	(4)	0
Amounts reclassified from AOCI, before tax	0	0
Net current-period other comprehensive income (loss), before tax	(4)	0
Ending balance, before tax	$ (6)	$ (2)	$ (2)