Employee Benefits Plan - Summary of Activity in Defined Benefit Obligation (Detail) - USD ($)
$ in Millions |
12 Months Ended |
Dec. 31, 2021 |
Dec. 31, 2020 |
| Disclosure of net defined benefit liability (asset) [Line Items] |
|
|
| Beginning of period |
$ (470)
|
$ (629)
|
| Current service cost |
(44)
|
(45)
|
| Interest cost |
12
|
21
|
| Administration fees disbursements |
8
|
8
|
| Exchange differences |
0
|
7
|
| Other |
0
|
|
| End of period |
(267)
|
(470)
|
| Present Value of Defined Benefit Obligation [Member] |
|
|
| Disclosure of net defined benefit liability (asset) [Line Items] |
|
|
| Beginning of period |
(4,307)
|
(4,029)
|
| Current service cost |
(44)
|
(45)
|
| Administration fees |
(8)
|
(8)
|
| Interest cost |
(99)
|
(115)
|
| Actuarial losses from changes in financial assumptions |
198
|
(436)
|
| Actuarial gains from changes in demographic assumptions |
(5)
|
26
|
| Experience (losses) gains |
(9)
|
5
|
| Contributions by employees |
(4)
|
(3)
|
| Benefits paid |
234
|
218
|
| Administration fees disbursements |
6
|
7
|
| Plan amendments |
4
|
115
|
| Exchange differences |
9
|
(45)
|
| Other |
0
|
3
|
| End of period |
(4,025)
|
(4,307)
|
| Funded Plans [Member] |
|
|
| Disclosure of net defined benefit liability (asset) [Line Items] |
|
|
| Current service cost |
(42)
|
(44)
|
| Interest cost |
3
|
9
|
| Administration fees disbursements |
7
|
7
|
| Funded Plans [Member] | Present Value of Defined Benefit Obligation [Member] |
|
|
| Disclosure of net defined benefit liability (asset) [Line Items] |
|
|
| Beginning of period |
(3,915)
|
(3,628)
|
| Current service cost |
(42)
|
(44)
|
| Administration fees |
(7)
|
(7)
|
| Interest cost |
(90)
|
(103)
|
| Actuarial losses from changes in financial assumptions |
186
|
(406)
|
| Actuarial gains from changes in demographic assumptions |
(5)
|
23
|
| Experience (losses) gains |
|
(20)
|
| Contributions by employees |
(2)
|
(1)
|
| Benefits paid |
198
|
190
|
| Administration fees disbursements |
6
|
7
|
| Plan amendments |
4
|
119
|
| Exchange differences |
9
|
(43)
|
| Other |
|
(2)
|
| End of period |
(3,658)
|
(3,915)
|
| Unfunded Plans [Member] |
|
|
| Disclosure of net defined benefit liability (asset) [Line Items] |
|
|
| Current service cost |
(1)
|
(1)
|
| Interest cost |
8
|
9
|
| Administration fees disbursements |
1
|
1
|
| Unfunded Plans [Member] | Present Value of Defined Benefit Obligation [Member] |
|
|
| Disclosure of net defined benefit liability (asset) [Line Items] |
|
|
| Beginning of period |
(317)
|
(299)
|
| Current service cost |
(1)
|
(1)
|
| Administration fees |
(1)
|
(1)
|
| Interest cost |
(8)
|
(9)
|
| Actuarial losses from changes in financial assumptions |
9
|
(20)
|
| Actuarial gains from changes in demographic assumptions |
|
2
|
| Experience (losses) gains |
(4)
|
(3)
|
| Benefits paid |
27
|
20
|
| Plan amendments |
|
(4)
|
| Exchange differences |
|
(2)
|
| End of period |
(295)
|
(317)
|
| Other Post Employment Benefits [Member] |
|
|
| Disclosure of net defined benefit liability (asset) [Line Items] |
|
|
| Beginning of period |
(98)
|
(119)
|
| Current service cost |
(1)
|
|
| Interest cost |
1
|
3
|
| Exchange differences |
1
|
2
|
| Other |
0
|
(2)
|
| End of period |
(96)
|
(98)
|
| Other Post Employment Benefits [Member] | Present Value of Defined Benefit Obligation [Member] |
|
|
| Disclosure of net defined benefit liability (asset) [Line Items] |
|
|
| Beginning of period |
(75)
|
(102)
|
| Current service cost |
(1)
|
|
| Interest cost |
(1)
|
(3)
|
| Actuarial losses from changes in financial assumptions |
3
|
(10)
|
| Actuarial gains from changes in demographic assumptions |
|
1
|
| Experience (losses) gains |
(5)
|
28
|
| Contributions by employees |
(2)
|
(2)
|
| Benefits paid |
9
|
8
|
| Other |
|
5
|
| End of period |
$ (72)
|
$ (75)
|