Financial Instruments - Fair Value Gains and Losses from Derivative Financial Instruments (Detail) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Gains (losses) on change in fair value of derivatives [line items] | ||
| Fair Value (Loss) Gain Through Earnings | $ 8 | $ (99) |
| Fair Value Gain (Loss) Through Equity | (4) | 13 |
| Foreign exchange contracts [member] | ||
| Gains (losses) on change in fair value of derivatives [line items] | ||
| Fair Value (Loss) Gain Through Earnings | 0 | (2) |
| Fair Value Gain (Loss) Through Equity | 0 | 0 |
| Fixed-to-floating interest rate swaps [member] | ||
| Gains (losses) on change in fair value of derivatives [line items] | ||
| Fair Value (Loss) Gain Through Earnings | (16) | 0 |
| Fair Value Gain (Loss) Through Equity | 0 | 0 |
| Cross-currency interest rate swaps [member] | ||
| Gains (losses) on change in fair value of derivatives [line items] | ||
| Fair Value (Loss) Gain Through Earnings | 24 | (97) |
| Fair Value Gain (Loss) Through Equity | $ (4) | $ 13 |