Employee Benefits Plan - Fair Value of Plan Assets (Detail) - USD ($)
$ in Millions |
12 Months Ended |
Dec. 31, 2021 |
Dec. 31, 2020 |
| Disclosure of fair value of plan assets [Line Items] |
|
|
| Beginning of period |
$ 470
|
$ 629
|
| Interest income |
(12)
|
(21)
|
| Administration fees disbursements |
(8)
|
(8)
|
| Exchange differences |
0
|
(7)
|
| Other |
0
|
|
| End of period |
267
|
470
|
| Fair Value of Plan Assets [Member] |
|
|
| Disclosure of fair value of plan assets [Line Items] |
|
|
| Beginning of period |
3,867
|
3,428
|
| Interest income |
87
|
94
|
| Return on plan assets excluding amounts included in interest income |
43
|
482
|
| Contributions by employer |
38
|
33
|
| Contributions by employees |
4
|
3
|
| Benefits paid |
(234)
|
(218)
|
| Administration fees disbursements |
(6)
|
(7)
|
| Exchange differences |
(9)
|
51
|
| Other |
|
1
|
| End of period |
3,790
|
3,867
|
| Funded Plans [member] |
|
|
| Disclosure of fair value of plan assets [Line Items] |
|
|
| Interest income |
(3)
|
(9)
|
| Administration fees disbursements |
(7)
|
(7)
|
| Funded Plans [member] | Fair Value of Plan Assets [Member] |
|
|
| Disclosure of fair value of plan assets [Line Items] |
|
|
| Beginning of period |
3,867
|
3,428
|
| Interest income |
87
|
94
|
| Return on plan assets excluding amounts included in interest income |
43
|
482
|
| Contributions by employer |
4
|
7
|
| Contributions by employees |
2
|
1
|
| Benefits paid |
(198)
|
(190)
|
| Administration fees disbursements |
(6)
|
(7)
|
| Exchange differences |
(9)
|
51
|
| Other |
|
1
|
| End of period |
3,790
|
3,867
|
| Unfunded Plans [Member] |
|
|
| Disclosure of fair value of plan assets [Line Items] |
|
|
| Interest income |
(8)
|
(9)
|
| Administration fees disbursements |
(1)
|
(1)
|
| Unfunded Plans [Member] | Fair Value of Plan Assets [Member] |
|
|
| Disclosure of fair value of plan assets [Line Items] |
|
|
| Contributions by employer |
27
|
20
|
| Benefits paid |
(27)
|
(20)
|
| Other Post Employment Benefits [Member] |
|
|
| Disclosure of fair value of plan assets [Line Items] |
|
|
| Beginning of period |
98
|
119
|
| Interest income |
(1)
|
(3)
|
| Exchange differences |
(1)
|
(2)
|
| Other |
0
|
2
|
| End of period |
96
|
98
|
| Other Post Employment Benefits [Member] | Fair Value of Plan Assets [Member] |
|
|
| Disclosure of fair value of plan assets [Line Items] |
|
|
| Contributions by employer |
7
|
6
|
| Contributions by employees |
2
|
2
|
| Benefits paid |
$ (9)
|
$ (8)
|