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COMMITMENTS, CONTINGENCIES, AND GUARANTEES (Tables) | 9 Months Ended
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Sep. 30, 2025
Commitments and Contingencies Disclosure [Abstract] |
Schedule of Commitments | The table below summarizes United's firm commitments as of September 30, 2025, which include aircraft and related spare engines, aircraft improvements and non-aircraft commitments (in billions):
|  | Last Three Months of 2025 |  | 2026 |  | 2027 |  | 2028 |  | 2029 |  | After 2029 |  | Total |
Purchase commitments |  | $ | 4.6 |  |  | $ | 7.8 |  |  | $ | 5.1 |  |  | $ | 6.4 |  |  | $ | 8.1 |  |  | $ | 22.4 |  |  | $ | 54.3 |  |

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- Definition Tabular disclosure of unconditional purchase obligation not recognized as liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 440 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482648/440-10-50-4 + Details
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