Earnings Per Share - Schedule of Warrants Outstanding (Details) - $ / shares |
Sep. 30, 2024 |
Aug. 31, 2024 |
|---|---|---|
| Class of Warrant or Right [Line Items] | ||
| Number of Shares of UAL Common Stock (in shares) | 3,513,714 | |
| Exercise Price (in dollars per share) | $ 31.50 | |
| PSP2 Warrants | ||
| Class of Warrant or Right [Line Items] | ||
| Number of Shares of UAL Common Stock (in shares) | 2,011,924 | |
| Exercise Price (in dollars per share) | $ 43.26 | |
| PSP3 Warrants | ||
| Class of Warrant or Right [Line Items] | ||
| Number of Shares of UAL Common Stock (in shares) | 1,501,790 | |
| Exercise Price (in dollars per share) | $ 53.92 |