Supplemental Cash Flow Information (Reconciliation of Additions to Property, Plant and Equipment to Total Capital Expenditures) (Detail) - USD ($) $ in Millions |
3 Months Ended | |||
|---|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
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| Supplemental Cash Flow Elements [Abstract] | ||||
| Additions to property, plant and equipment per the consolidated statements of cash flows | $ 913 | $ 663 | ||
| Increase (decrease) in capital accruals | 99 | (19) | ||
| Capital expenditures | [1] | $ 1,012 | $ 644 | |
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