Financial instruments and management of financial risks - Credit risk (Details) - USD ($) $ in Millions |
Dec. 31, 2023 |
Dec. 31, 2022 |
|---|---|---|
| Credit risk | ||
| Maximum exposure (excluding income tax effects) to credit risk | $ 703 | $ 666 |
| Cash and cash equivalents | ||
| Credit risk | ||
| Maximum exposure (excluding income tax effects) to credit risk | 127 | 125 |
| Accounts receivable | ||
| Credit risk | ||
| Maximum exposure (excluding income tax effects) to credit risk | 498 | 428 |
| Due from affiliated companies | ||
| Credit risk | ||
| Maximum exposure (excluding income tax effects) to credit risk | 62 | 81 |
| Derivative assets | ||
| Credit risk | ||
| Maximum exposure (excluding income tax effects) to credit risk | $ 16 | $ 32 |