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Income Taxes - Components Of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Deferred tax assets: |  |
Deferred revenue/gains | $ 301 | $ 161
Employee benefits | 70 | 71
Foreign tax credit | 83 | 77
Other | 4 | 4
Net operating loss carryforward | 522 | 335
Operating lease liabilities | 189 | 204
Rent expense | 108 | 120
Total deferred tax assets | 1,277 | 972
Valuation allowance | (73) | (69)
Deferred tax assets, net | 1,204 | 903
Deferred tax liabilities: |  |
Accelerated depreciation | (1,845) | (1,625)
Operating lease assets | (182) | (197)
Other | (20) | (3)
Deferred Tax Liabilities, Gross | (2,047) | (1,825)
Deferred Tax Liabilities, Net | $ (843) | $ (922)

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