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Income taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
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Deferred tax assets: |  |  |  |
Company retirement benefit plans | $ 38 | $ 26 |  |
Revaluation of derivative financial instruments to fair value | 2 | 0 |  |
Tax losses, credits and interest deduction carryforwards | 1,052 | 855 |  |
Share-based compensation | 41 | 31 |  |
Accrued expenses | 420 | 350 |  |
Lease liabilities | 292 | 263 |  |
Total deferred tax assets | 1,845 | 1,525 |  |
Less: valuation allowances | (914) | (737) | $ (578) | $ (507)
Total deferred tax assets after valuation allowances | 931 | 788 |  |
Deferred tax liabilities: |  |  |  |
Investment in subsidiaries | 155 | 159 |  |
Depreciation, depletion and amortization | 3,109 | 3,165 |  |
Leased right-of-use assets | 274 | 250 |  |
Rolled-over capital gains | 21 | 20 |  |
Other | 12 | 0 |  |
Total deferred tax liabilities | 3,571 | 3,594 |  |
Total net deferred tax liabilities | $ 2,640 | $ 2,806 |  |

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