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REVENUE FROM CONTRACTS WITH CUSTOMERS (Tables) | 3 Months Ended
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Mar. 31, 2023
Revenue Recognition [Abstract] |
Disaggregation of Revenue | Passenger revenue recognized in the condensed consolidated statements of operations (in millions):
| Three Months Ended March 31, |  |
| 2023 |  | 2022 |  |  |  |
Passenger ticket revenue, including ticket breakage, net of taxes and fees | $ | 1,648 |  |  | $ | 1,232 |  |  |  |  |
Passenger ancillary revenue | 104 |  |  | 91 |  |  |  |  |
Mileage Plan passenger revenue | 232 |  |  | 188 |  |  |  |  |
Total Passenger revenue | $ | 1,984 |  |  | $ | 1,511 |  |  |  |  |
Mileage Plan revenue included in the condensed consolidated statements of operations (in millions):
| Three Months Ended March 31, |  |
| 2023 |  | 2022 |  |  |  |
Passenger revenue | $ | 232 |  |  | $ | 188 |  |  |  |  |
Mileage Plan other revenue | 154 |  |  | 112 |  |  |  |  |
Total Mileage Plan revenue | $ | 386 |  |  | $ | 300 |  |  |  |  |
Cargo and other revenue included in the condensed consolidated statements of operations (in millions):
| Three Months Ended March 31, |  |
| 2023 |  | 2022 |  |  |  |
Cargo revenue | $ | 29 |  |  | $ | 29 |  |  |  |  |
Other revenue | 29 |  |  | 29 |  |  |  |  |
Total Cargo and other revenue | $ | 58 |  |  | $ | 58 |  |  |  |  |
Contract with Customer Liabilities | The table below presents a roll forward of the total frequent flyer liability (in millions):
| Three Months Ended March 31,
| 2023 |  | 2022
Total Deferred Revenue balance at January 1 | $ | 2,497 |  |  | $ | 2,358 |
Travel miles and companion certificate redemption - Passenger revenue | (218) |  |  | (176) |
Miles redeemed on partner airlines - Other revenue | (21) |  |  | (9) |
Increase in liability for mileage credits issued | 285 |  |  | 259 |
Total Deferred Revenue balance at March 31 | $ | 2,543 |  |  | $ | 2,432 |

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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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