Related Party Transactions (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
|
| Significant transactions with related parties | |||
| Operating revenues and other income | $ 88 | $ 79 | $ 89 |
| Purchases | 5 | 0 | 38 |
| Operating expenses and selling, general and administrative expenses | 196 | 63 | 65 |
| Net interest income | $ (2) | $ (5) | $ (13) |