Taxation - Schedule of Taxes on items Recognized in other Comprehensive loss or Directly in Equity (Detail) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Disclosure Of Income Taxes [Line Items] | ||
| Deferred tax expense on remeasurement on defined benefit pension plans | $ 58 | $ 17 |
| Deferred tax (benefit) expense on share of other comprehensive (loss) income in equity method investments | (23) | 36 |
| Employee benefits [member] | ||
| Disclosure Of Income Taxes [Line Items] | ||
| Deferred tax expense on remeasurement on defined benefit pension plans | 58 | 17 |
| Deferred and share-based compensation [member] | ||
| Disclosure Of Income Taxes [Line Items] | ||
| Deferred tax benefit on share-based payments | (21) | (3) |
| Current tax benefit on share-based payments | $ (18) | $ (11) |