Income Taxes - Schedule of Amount of Uncertain Tax Positions (Details) - USD ($) $ in Millions |
6 Months Ended | 12 Months Ended | |
|---|---|---|---|
Dec. 31, 2021 |
Jun. 30, 2021 |
Dec. 31, 2020 |
|
| Income Tax Disclosure [Abstract] | |||
| Beginning balance | $ 35 | $ 34 | $ 56 |
| Reductions for tax positions of prior years | (19) | ||
| Lapse of statute of limitations | (5) | (3) | |
| Additions for tax positions of prior years | 1 | ||
| Ending balance | $ 30 | $ 35 | $ 34 |