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REVENUE RECOGNITION (Tables) | 9 Months Ended
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Sep. 30, 2025
Revenue from Contract with Customer [Abstract] |
Schedule of Operating Revenue by Geographic Region | The table below presents the Company's operating revenue by principal geographic region (in millions):
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2025 |  | 2024 |  | 2025 |  | 2024
Domestic (U.S. and Canada) | $ | 8,990 |  |  | $ | 8,648 |  |  | $ | 25,808 |  |  | $ | 25,082 |
Atlantic | 3,486 |  |  | 3,432 |  |  | 8,755 |  |  | 8,542 |
Pacific | 1,568 |  |  | 1,531 |  |  | 5,009 |  |  | 4,721 |
Latin America | 1,181 |  |  | 1,232 |  |  | 4,100 |  |  | 4,023 |
Total | $ | 15,225 |  |  | $ | 14,843 |  |  | $ | 43,673 |  |  | $ | 42,368 |
Schedule of Roll Forward of Frequent Flyer Deferred Revenue | The table below presents a roll forward of Frequent flyer deferred revenue (in millions):
| Three Months Ended September 30, |  | Nine Months Ended September 30, |  |  |  |
| 2025 |  | 2024 |  | 2025 |  | 2024 |  |  |  |
Beginning Balance | $ | 7,665 |  |  | $ | 7,353 |  |  | $ | 7,441 |  |  | $ | 7,143 |  |  |  |  |
Miles earned | 968 |  |  | 884 |  |  | 2,878 |  |  | 2,643 |  |  |  |  |
Travel miles redeemed | (896) |  |  | (842) |  |  | (2,514) |  |  | (2,325) |  |  |  |  |
Non-travel miles redeemed | (36) |  |  | (24) |  |  | (103) |  |  | (90) |  |  |  |  |
Ending Balance | $ | 7,702 |  |  | $ | 7,371 |  |  | $ | 7,702 |  |  | $ | 7,371 |  |  |  |  |

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- Definition Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-10 + Details
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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-5 + Details
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