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Income Taxes - Temporary Differences and Carryforwards Giving Rise to Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Deferred income tax asset (liability): |  |
Federal and state net operating loss ("NOL") carryforwards | $ 2,932 | $ 2,229
Deferred revenue | 1,783 | 2,349
Employee benefits, including pension, postretirement and medical | 606 | 986
Operating lease liabilities | 1,118 | 1,272
Other financing liabilities | 141 | 327
Interest expense carryforward | 510 | 0
Other | 576 | 535
Less: Valuation allowance | (199) | (210)
Total deferred tax assets | 7,467 | 7,488
Depreciation | (5,844) | (5,122)
Operating lease right-of-use asset | (881) | (1,051)
Intangibles | (651) | (656)
Total deferred tax liabilities | (7,376) | (6,829)
Net deferred tax asset | 91 | 659
United Airlines, Inc. |  |
Deferred income tax asset (liability): |  |
Federal and state net operating loss ("NOL") carryforwards | 2,903 | 2,201
Deferred revenue | 1,783 | 2,349
Employee benefits, including pension, postretirement and medical | 606 | 986
Operating lease liabilities | 1,118 | 1,272
Other financing liabilities | 141 | 327
Interest expense carryforward | 510 | 0
Other | 576 | 535
Less: Valuation allowance | (199) | (210)
Total deferred tax assets | 7,438 | 7,460
Depreciation | (5,844) | (5,122)
Operating lease right-of-use asset | (881) | (1,051)
Intangibles | (651) | (656)
Total deferred tax liabilities | (7,376) | (6,829)
Net deferred tax asset | $ 62 | $ 631

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