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COMMITMENTS, CONTINGENCIES, AND GUARANTEES - Narrative (Details) $ in Billions | 3 Months Ended
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Mar. 31, 2025 USD ($) employee
United Airlines, Inc. |
Commitments and Contingencies [Line Items] |
Number of employees | employee | 109,200
Percentage of employees represented by various U.S. labor organizations | 82.00%
Tax-Exempt Special Facilities Revenue Bonds |
Commitments and Contingencies [Line Items] |
Aggregate principal amount of guarantee | $ 2.9
Floating Rate Debt |
Commitments and Contingencies [Line Items] |
Long-term debt, carrying amount | $ 8.4
Remaining term of debt | 12 years
Loans and Leases from Non-U.S. Entities |
Commitments and Contingencies [Line Items] |
Remaining term of debt | 12 years
Aggregate balance | $ 5.2

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