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REVENUE FROM CONTRACTS WITH CUSTOMERS (Tables) | 6 Months Ended
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Jun. 30, 2022
Revenue Recognition [Abstract] |
Disaggregation of Revenue | Passenger revenue recognized in the condensed consolidated statements of operations (in millions):
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2022 |  | 2021 |  | 2022 |  | 2021
Passenger ticket revenue, including ticket breakage, net of taxes and fees | $ | 2,052 |  |  | $ | 1,114 |  |  | $ | 3,284 |  |  | $ | 1,639 |
Passenger ancillary revenue | 119 |  |  | 84 |  |  | 210 |  |  | 134 |
Mileage Plan passenger revenue | 247 |  |  | 154 |  |  | 435 |  |  | 238 |
Total Passenger revenue | $ | 2,418 |  |  | $ | 1,352 |  |  | $ | 3,929 |  |  | $ | 2,011 |
Mileage Plan revenue included in the condensed consolidated statements of operations (in millions):
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2022 |  | 2021 |  | 2022 |  | 2021
Passenger revenue | $ | 247 |  |  | $ | 154 |  |  | $ | 435 |  |  | $ | 238 |
Mileage Plan other revenue | 175 |  |  | 118 |  |  | 287 |  |  | 212 |
Total Mileage Plan revenue | $ | 422 |  |  | $ | 272 |  |  | $ | 722 |  |  | $ | 450 |
Cargo and other revenue included in the condensed consolidated statements of operations (in millions):
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2022 |  | 2021 |  | 2022 |  | 2021
Cargo revenue | $ | 36 |  |  | $ | 34 |  |  | $ | 65 |  |  | $ | 61 |
Other revenue | 29 |  |  | 23 |  |  | 58 |  |  | 40 |
Total Cargo and other revenue | $ | 65 |  |  | $ | 57 |  |  | $ | 123 |  |  | $ | 101 |
Contract with Customer Liabilities | The table below presents a roll forward of the total frequent flyer liability (in millions):
|  |  | Six Months Ended June 30,
|  |  |  |  | 2022 |  | 2021
Total Deferred revenue balance at January 1 |  |  |  |  | $ | 2,358 |  |  | $ | 2,277 |
Travel miles and companion certificate redemption - Passenger revenue |  |  |  |  | (409) |  |  | (238) |
Miles redeemed on partner airlines - Other revenue |  |  |  |  | (26) |  |  | (17) |
Increase in liability for mileage credits issued |  |  |  |  | 518 |  |  | 324 |
Total Deferred revenue balance at June 30 |  |  |  |  | $ | 2,441 |  |  | $ | 2,346 |

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130551-203045 + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130545-203045 + Details
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