Income Taxes - Deferred Tax Asset of U.S. Consolidated Federal Income Tax Group (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
|
| Income Tax Disclosure [Abstract] | |||
| Unrecognized tax benefits, if recognized would favorably affect the effective tax rate | $ 1,400 | $ 1,200 | $ 1,100 |
| Unrecognized tax benefits, interest and penalties accrued | 52 | 63 | 69 |
| Unrecognized tax benefits, interest net of the federal (benefit) expense and penalties | $ (11) | $ (2) | $ (207) |