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Summary of Significant Accounting Policies - Other Investments (Details) - USD ($) $ in Millions | Jun. 30, 2021 | Dec. 31, 2020
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Accounting Policies [Abstract] |  |
Cost method investments - jetblue tech ventures | $ 46 | $ 40
Measurement alternative, ownership percentage | 10.00% |
Cost method investments - TWA flight center hotel | $ 14 | $ 14

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- Definition Cost Method Investments - JetBlue Tech Ventures + References No definition available. + Details
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- Definition Cost Method Investments - TWA Flight Center Hotel + References No definition available. + Details
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- Definition Ownership Interest, Measurement Alternative, Percentage + References No definition available. + Details
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- References No definition available. + Details
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