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Income Taxes - Components of Net Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Deferred tax assets |  |
Post-retirement and pension benefit costs | $ 583 | $ 659
Net operating loss carryforwards | 649 | 794
Other employee benefits | 22 | 23
Other | 744 | 511
Gross deferred tax assets | 1,998 | 1,987
Less valuation allowance | (343) | (399)
Net deferred tax assets | 1,655 | 1,588
Deferred tax liabilities |  |
Property, plant and equipment, primarily due to depreciation differences | (3,447) | (3,332)
Goodwill and other intangible assets | (1,002) | (1,271)
Gross deferred tax liabilities | (4,449) | (4,603)
Net deferred tax liability | $ (2,794) | $ (3,015)

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