Income Taxes - Change in Valuation Allowance (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
|
| Valuation Allowance, Deferred Tax Asset, Change [Roll Forward] | |||
| Balance at beginning of year | $ 91 | $ 113 | $ 107 |
| Establishment of new allowances | 0 | 22 | 0 |
| Net change to existing allowances | (3) | (16) | 18 |
| Release of allowances | 0 | 0 | (11) |
| Acquisitions and divestitures | 0 | (31) | 0 |
| Foreign currency translation | (1) | 3 | (1) |
| Balance at end of year | 90 | 91 | 113 |
| Valuation Allowance, Deferred Tax Asset, Establishment Of New Allowance | $ 3 | $ 0 | $ 0 |