Derivatives and Risk Management - Offsetting Assets and Liabilities (Details) - USD ($) $ in Millions |
Dec. 31, 2019 |
Dec. 31, 2018 |
|---|---|---|
| Derivative [Line Items] | ||
| Total derivative contracts, net | $ 68 | $ 13 |
| Prepaid expenses and other | ||
| Derivative [Line Items] | ||
| Net derivative contracts, assets | 24 | 35 |
| Other noncurrent assets | ||
| Derivative [Line Items] | ||
| Net derivative contracts, assets | 53 | 0 |
| Other accrued liabilities | ||
| Derivative [Line Items] | ||
| Net derivative contracts, liabilities | (5) | (13) |
| Other noncurrent liabilities | ||
| Derivative [Line Items] | ||
| Net derivative contracts, liabilities | $ (4) | $ (9) |