Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2020 |
Sep. 30, 2019 |
Sep. 30, 2020 |
Sep. 30, 2019 |
|
| Statement of Comprehensive Income [Abstract] | ||||
| Actuarial (gain) loss, tax | $ 1 | $ 0 | $ 1 | $ 1 |
| Unrealized gain (loss) on cash flow hedges, tax | $ 0 | $ 0 | $ (1) | $ (5) |