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Accumulated Other Comprehensive Loss - Components of AOCI (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Mar. 31, 2024 | Jun. 30, 2023 | Mar. 31, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Tax |  |  |  |  |  |
Beginning balance, tax |  | $ (1,512) |  |  | $ (1,512) |
Other comprehensive income (loss) before reclassifications |  |  |  |  | 1 |
Amounts reclassified from AOCI |  |  |  |  | (11) |
Net current-period other comprehensive income (loss) |  |  |  |  | (10) |
Ending balance, tax | $ (1,522) |  |  |  | (1,522) |
Net of tax |  |  |  |  |  |
Beginning balance, net of tax |  | (4,894) |  |  | (4,894) |
Other comprehensive income (loss) before reclassifications |  |  |  |  | (1) |
Amounts reclassified from AOCI |  |  |  |  | 37 |
Total other comprehensive income, net of tax | 19 | 17 | $ 17 | $ 18 | 36 | $ 35
Ending balance, net of tax | (4,858) |  |  |  | (4,858) |
American Airlines, Inc. |  |  |  |  |  |
Tax |  |  |  |  |  |
Beginning balance, tax |  | (1,621) |  |  | (1,621) |
Other comprehensive income (loss) before reclassifications |  |  |  |  | 1 |
Amounts reclassified from AOCI |  |  |  |  | (11) |
Net current-period other comprehensive income (loss) |  |  |  |  | (10) |
Ending balance, tax | (1,631) |  |  |  | (1,631) |
Net of tax |  |  |  |  |  |
Beginning balance, net of tax |  | (4,999) |  |  | (4,999) |
Other comprehensive income (loss) before reclassifications |  |  |  |  | (1) |
Amounts reclassified from AOCI |  |  |  |  | 37 |
Total other comprehensive income, net of tax | 19 | 17 | $ 17 | $ 18 | 36 | $ 35
Ending balance, net of tax | (4,963) |  |  |  | (4,963) |
Pension, Retiree Medical and Other Postretirement Benefits |  |  |  |  |  |
Before tax |  |  |  |  |  |
Beginning balance, before tax |  | (3,380) |  |  | (3,380) |
Other comprehensive income (loss) before reclassifications |  |  |  |  | 0 |
Amounts reclassified from AOCI |  |  |  |  | 48 |
Net current-period other comprehensive income (loss) |  |  |  |  | 48 |
Ending balance, before tax | (3,332) |  |  |  | (3,332) |
Pension, Retiree Medical and Other Postretirement Benefits | American Airlines, Inc. |  |  |  |  |  |
Before tax |  |  |  |  |  |
Beginning balance, before tax |  | (3,376) |  |  | (3,376) |
Other comprehensive income (loss) before reclassifications |  |  |  |  | 0 |
Amounts reclassified from AOCI |  |  |  |  | 48 |
Net current-period other comprehensive income (loss) |  |  |  |  | 48 |
Ending balance, before tax | (3,328) |  |  |  | (3,328) |
Unrealized Loss on Investments |  |  |  |  |  |
Before tax |  |  |  |  |  |
Beginning balance, before tax |  | (2) |  |  | (2) |
Other comprehensive income (loss) before reclassifications |  |  |  |  | (2) |
Amounts reclassified from AOCI |  |  |  |  | 0 |
Net current-period other comprehensive income (loss) |  |  |  |  | (2) |
Ending balance, before tax | (4) |  |  |  | (4) |
Unrealized Loss on Investments | American Airlines, Inc. |  |  |  |  |  |
Before tax |  |  |  |  |  |
Beginning balance, before tax |  | $ (2) |  |  | (2) |
Other comprehensive income (loss) before reclassifications |  |  |  |  | (2) |
Amounts reclassified from AOCI |  |  |  |  | 0 |
Net current-period other comprehensive income (loss) |  |  |  |  | (2) |
Ending balance, before tax | $ (4) |  |  |  | $ (4) |

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