Financial Instruments - Outstanding Instruments (Detail) $ in Millions |
12 Months Ended |
|---|---|
|
Dec. 31, 2024
USD ($)
| |
| Fair value hedges | |
| Disclosure of detailed information about hedges [Line Items] | |
| Currency received | Fixed interest |
| Currency paid | Floating SOFR |
| Hedged Risk | Interest rate |
| Year of Maturity | 2043 |
| Principal Amount | $ 410 |
| Cash flow hedges | |
| Disclosure of detailed information about hedges [Line Items] | |
| Currency received | Canadian dollar fixed |
| Currency paid | U.S. dollar fixed |
| Hedged Risk | Foreign exchange |
| Year of Maturity | 2025 |
| Principal Amount | $ 999 |