Financial Instruments - Recurring fair value measurements (Details) - USD ($) $ in Millions |
Dec. 31, 2022 |
Dec. 31, 2021 |
|---|---|---|
| Assets | ||
| Derivatives | $ 18 | $ 29 |
| Investment securities | 748 | 1,041 |
| Liabilities | ||
| Derivatives | (86) | (49) |
| Recurring | ||
| Assets | ||
| Derivatives | 18 | 29 |
| Investment securities | 748 | 1,041 |
| Assets, fair value | 766 | 1,070 |
| Liabilities | ||
| Derivatives | (86) | (49) |
| Total liabilities | (86) | (49) |
| Recurring | Level 1 | ||
| Assets | ||
| Derivatives | 0 | 0 |
| Investment securities | 748 | 1,033 |
| Assets, fair value | 748 | 1,033 |
| Liabilities | ||
| Derivatives | 0 | 0 |
| Total liabilities | 0 | 0 |
| Recurring | Level 2 | ||
| Assets | ||
| Derivatives | 18 | 29 |
| Investment securities | 0 | 0 |
| Assets, fair value | 18 | 29 |
| Liabilities | ||
| Derivatives | (86) | (49) |
| Total liabilities | (86) | (49) |
| Recurring | Level 3 | ||
| Assets | ||
| Derivatives | 0 | 0 |
| Investment securities | 0 | 8 |
| Assets, fair value | 0 | 8 |
| Liabilities | ||
| Derivatives | 0 | 0 |
| Total liabilities | $ 0 | $ 0 |