Commitments and Contingencies - Narrative (Details) $ in Millions |
3 Months Ended | |
|---|---|---|
|
Mar. 31, 2024
USD ($)
employee
|
Apr. 17, 2024
aircraft
|
|
| United Airlines, Inc. | ||
| Commitments and Contingencies [Line Items] | ||
| Number of employees | employee | 104,500 | |
| Percentage of employees represented by various U.S. labor organizations | 83.00% | |
| Tax-Exempt Special Facilities Revenue Bonds | ||
| Commitments and Contingencies [Line Items] | ||
| Aggregate principal amount of guarantee | $ 1,900 | |
| Aircraft Mortgage Debt | ||
| Commitments and Contingencies [Line Items] | ||
| Aggregate principal amount of guarantee | 73 | |
| Floating Rate Debt | ||
| Commitments and Contingencies [Line Items] | ||
| Long-term debt | $ 10,100 | |
| 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 | $ 6,900 | |
| Subsequent Event | A321neo | ||
| Commitments and Contingencies [Line Items] | ||
| Number of aircrafts with expected deliveries in 2026 and 2027 | aircraft | 35 |