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Contingencies and commitments - (Tables) | 12 Months Ended
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Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract] |
U.S. repatriation tax commitments | The following table summarizes the remaining scheduled repatriation tax payments as of December 31, 2019 (in millions):
| Amounts
2020 | $ | 587 |
2021 | 587 |
2022 | 587 |
2023 | 1,100 |
2024 | 1,467 |
Thereafter | 1,834 |
Total remaining U.S. repatriation tax commitments | $ | 6,162 |

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