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Revenue Recognition (Tables) | 3 Months Ended
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Mar. 31, 2024
Revenue from Contract with Customer [Abstract] |
Disaggregation of revenue | The following table provides revenue recognized by revenue source for the three months ended March 31, 2024 and 2023 (in millions):
| Three Months Ended March 31, |  |
| 2024 |  | 2023 |  |  |  |
Passenger revenue |  |  |  |  |  |  |
Passenger travel | $ | 1,888 |  |  | $ | 2,026 |  |  |  |  |
Loyalty revenue - air transportation | 167 |  |  | 156 |  |  |  |  |
Other revenue |  |  |  |  |  |  |
Loyalty revenue | 107 |  |  | 100 |  |  |  |  |
Other revenue | 47 |  |  | 46 |  |  |  |  |
Total operating revenue | $ | 2,209 |  |  | $ | 2,328 |  |  |  |  |
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):
| March 31, 2024 |  | December 31, 2023
Air traffic liability - passenger travel | $ | 1,354 |  |  | $ | 1,099 |
Air traffic liability - loyalty program (air transportation) | 1,076 |  |  | 1,072 |
Deferred revenue (1) | 472 |  |  | 487 |
Total | $ | 2,902 |  |  | $ | 2,658 |
(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 three months ended March 31, 2024 and 2023 (in millions):
Balance at December 31, 2023 | $ | 1,072 |
TrueBlue® points redeemed passenger | (160) |
TrueBlue® points redeemed other | (7) |
TrueBlue® points earned and sold | 171 |
Balance at March 31, 2024 | $ | 1,076 |
Balance at December 31, 2022 | $ | 1,000 |
TrueBlue® points redeemed passenger | (156) |
TrueBlue® points redeemed other | — |
TrueBlue® points earned and sold | 154 |
Balance at March 31, 2023 | $ | 998 |

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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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