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Income Taxes - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2021 | Dec. 31, 2023 | Dec. 31, 2022
Other income tax disclosures |  |  |
Effect of unrecognized tax benefit on income tax expense | $ 30 | $ 31 | $ 30
Interest expense and penalties related to unrecognized income tax expense | $ (10) |  |
Net accrued interest and penalties |  | 13 | $ 13
State |  |  |
Operating loss carryforwards |  |  |
State NOL carryforwards |  | 4,050 |
Deferred income tax asset for State NOL carryforwards |  | 195 |
State interest limitation carryforwards |  | 556 |
Deferred income tax asset for State interest limitation carryforwards |  | 23 |
Federal |  |  |
Operating loss carryforwards |  |  |
Federal NOL carryforwards |  | 420 |
Deferred income tax asset for Federal NOL carryforwards |  | 88 |
Federal interest limitation carryforwards |  | 523 |
Deferred income tax asset for Federal interest limitation carryforwards |  | $ 110 |

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