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Revenue Recognition (Tables) | 9 Months Ended
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Sep. 30, 2022
Revenue from Contract with Customer [Abstract] |
Disaggregation of revenue | The following table provides the revenues recognized by revenue source for the three and nine months ended September 30, 2022 and 2021 (in millions):
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2022 |  | 2021 |  | 2022 |  | 2021
Passenger revenue |  |  |  |  |  |  |
Passenger travel | $ | 2,308 |  |  | $ | 1,773 |  |  | $ | 5,959 |  |  | $ | 3,717 |
Loyalty revenue - air transportation | 107 |  |  | 83 |  |  | 360 |  |  | 196 |
Other revenue |  |  |  |  |  |  |
Loyalty revenue | 102 |  |  | 80 |  |  | 287 |  |  | 206 |
Other revenue | 45 |  |  | 36 |  |  | 137 |  |  | 84 |
Total revenue | $ | 2,562 |  |  | $ | 1,972 |  |  | $ | 6,743 |  |  | $ | 4,203 |
Contract with customer, contract asset, contract liability, and receivable | Our contract liabilities primarily consist of ticket sales for which transportation has not yet been provided, unused credits available to customers, and outstanding loyalty points available for redemption (in millions):
| September 30, 2022 |  | December 31, 2021
Air traffic liability - passenger travel | $ | 1,443 |  |  | $ | 1,323 |
Air traffic liability - loyalty program (air transportation) | 976 |  |  | 891 |
Deferred revenue(1) | 547 |  |  | 613 |
Total | 2,966 |  |  | 2,827 |
(1) Deferred revenue is included within other accrued liabilities and other liabilities on our consolidated balance sheets. The table below presents the activity of the current and non-current air traffic liability for our loyalty program, and includes points earned and sold to participating companies for the nine months ended September 30, 2022 and 2021 (in millions):
Balance at December 31, 2021 | $ | 891 |
TrueBlue® points redeemed | (360) |
TrueBlue® points earned and sold | 445 |
Balance at September 30, 2022 | $ | 976 |
Balance at December 31, 2020 | $ | 733 |
TrueBlue® points redeemed | (196) |
TrueBlue® points earned and sold | 308 |
Balance at September 30, 2021 | $ | 845 |

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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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