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Income Taxes - Schedule of Components of Net Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | --- | ---
Deferred tax assets |  |  |  |
Depreciation | $ 8 | $ 8 |  |
R&D capitalization | 73 | 24 |  |
Employee benefits | 232 | 240 |  |
Loss provisions | 11 | 28 |  |
Deferred income/expense | 46 | 32 |  |
Interest | 6 | 32 |  |
Tax loss carryforwards | 1,941 | 2,905 |  |
Tax credit carryforwards | 110 | 216 |  |
Other | 5 | 10 |  |
Deferred tax assets, gross | 2,432 | 3,495 |  |
Valuation allowance | (1,705) | (1,821) | $ (1,965) | $ (2,279)
Deferred tax assets, net | 727 | 1,674 |  |
Deferred tax liabilities |  |  |  |
Depreciation | 529 | 510 |  |
R&D capitalization | 0 | 0 |  |
Employee benefits | 9 | 4 |  |
Loss provisions | 2 | 1 |  |
Deferred income/expense | 293 | 1,210 |  |
Interest | 0 | 0 |  |
Tax loss carryforwards | 0 | 0 |  |
Tax credit carryforwards | 0 | 0 |  |
Other | 8 | 4 |  |
Deferred tax liabilities, gross | $ 841 | $ 1,729 |  |

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