Supplemental Cash Flow Information - Details of Income Taxes Paid (Detail) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Disclosure Of Income Taxes [Line Items] | ||
| Operating activities | $ (172) | $ (52) |
| Investing activities | (850) | (114) |
| Total income taxes paid | (1,066) | (164) |
| Discontinued Operations [member] | ||
| Disclosure Of Income Taxes [Line Items] | ||
| Operating activities | (2) | 2 |
| Investing activities | $ (42) | $ 0 |