Financial Instruments - Outstanding Instruments (Detail) $ in Millions, £ in Billions |
12 Months Ended | |||
|---|---|---|---|---|
|
Dec. 31, 2021
USD ($)
|
Dec. 31, 2020
USD ($)
|
Nov. 30, 2021
USD ($)
|
Nov. 30, 2021
GBP (£)
|
|
| Disclosure of detailed information about hedges [Line Items] | ||||
| Currency received | Canadian dollar fixed | Canadian dollar fixed | ||
| Currency paid | U.S. dollar fixed | U.S. dollar fixed | ||
| Hedged Risk | Foreign exchange | Foreign exchange | ||
| Year of Maturity | 2025 | 2025 | ||
| Principal Amount | $ 999 | $ 999 | $ 3,500 | £ 2.6 |