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Revenue Recognition - Contract Liabilities (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Revenue from Contract with Customer [Abstract] |  |
Air traffic liability - passenger travel | $ 1,099 | $ 1,291
Air traffic liability - loyalty program (air transportation) | 1,072 | 1,000
Deferred revenue | 487 | 530
Total | $ 2,658 | $ 2,821

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- Definition Air Traffic Liability - Loyalty Program (Air Transportation) + References No definition available. + Details
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- Definition Air Traffic Liability - Passenger Travel + References No definition available. + Details
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- Definition Other Deferred Revenue + References No definition available. + Details
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- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479837/606-10-45-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-8 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479837/606-10-45-2 + Details
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