Employee Benefits Plan - Summary of Amounts Recognized in Other Comprehensive Loss (Income) for Material Defined Benefit Plans (Detail) - USD ($)
$ in Millions |
12 Months Ended |
Dec. 31, 2021 |
Dec. 31, 2020 |
| Remeasurement losses (gains) on defined benefit obligation: |
|
|
| Total recognized in other comprehensive (income) loss before taxation |
$ 228
|
$ 78
|
| Other Post Employment Benefits [Member] |
|
|
| Remeasurement losses (gains) on defined benefit obligation: |
|
|
| Total recognized in other comprehensive (income) loss before taxation |
(2)
|
18
|
| Material defined benefit plans [Member] |
|
|
| Remeasurement losses (gains) on defined benefit obligation: |
|
|
| Due to financial assumption changes |
(198)
|
436
|
| Due to demographic assumption changes |
5
|
(26)
|
| Due to experience |
9
|
(5)
|
| Return on plan assets greater than discount rate |
(43)
|
(482)
|
| Total recognized in other comprehensive (income) loss before taxation |
(227)
|
(77)
|
| Material defined benefit plans [Member] | Funded Plans [Member] |
|
|
| Remeasurement losses (gains) on defined benefit obligation: |
|
|
| Due to financial assumption changes |
(186)
|
406
|
| Due to demographic assumption changes |
5
|
(23)
|
| Due to experience |
0
|
20
|
| Return on plan assets greater than discount rate |
(43)
|
(482)
|
| Total recognized in other comprehensive (income) loss before taxation |
(224)
|
(79)
|
| Material defined benefit plans [Member] | Unfunded Plans [Member] |
|
|
| Remeasurement losses (gains) on defined benefit obligation: |
|
|
| Due to financial assumption changes |
(9)
|
20
|
| Due to demographic assumption changes |
0
|
(2)
|
| Due to experience |
4
|
3
|
| Return on plan assets greater than discount rate |
0
|
|
| Total recognized in other comprehensive (income) loss before taxation |
(5)
|
21
|
| Material defined benefit plans [Member] | Other Post Employment Benefits [Member] |
|
|
| Remeasurement losses (gains) on defined benefit obligation: |
|
|
| Due to financial assumption changes |
(3)
|
10
|
| Due to demographic assumption changes |
0
|
(1)
|
| Due to experience |
5
|
(28)
|
| Return on plan assets greater than discount rate |
0
|
|
| Total recognized in other comprehensive (income) loss before taxation |
$ 2
|
$ (19)
|