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Revenue - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Dec. 31, 2021 | Dec. 31, 2020
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |
Residual travel funds | 9.00% |  | 16.00% | 2.00%
Remaining customer travel funds | $ 1,200 |  |  |
Loyalty points, redemption period (in years) | 2 years |  |  |
Total operating revenues | $ 4,694 | $ 2,052 |  |
Chase Bank USA Agreement |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |
Total operating revenues | $ 486 | $ 280 |  |

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