Employee Benefits Plan - Summary of Major Categories of Plan Assets for Funded Plans (Detail) - USD ($)
$ in Millions |
Dec. 31, 2021 |
Dec. 31, 2020 |
| Disclosure of fair value of plan assets [Line Items] |
|
|
| Equities |
$ 678
|
$ 860
|
| Bonds |
1,814
|
2,036
|
| Property |
4
|
4
|
| Insurance |
34
|
36
|
| Derivatives |
631
|
679
|
| Cash and cash equivalents |
333
|
109
|
| Other |
8
|
8
|
| Total |
3,790
|
3,867
|
| U.S. [member] |
|
|
| Disclosure of fair value of plan assets [Line Items] |
|
|
| Equities |
180
|
222
|
| U.K. [Member] |
|
|
| Disclosure of fair value of plan assets [Line Items] |
|
|
| Equities |
3
|
3
|
| All Other Countries [Member] |
|
|
| Disclosure of fair value of plan assets [Line Items] |
|
|
| Equities |
495
|
635
|
| Corporate Bonds [Member] | U.S. [member] |
|
|
| Disclosure of fair value of plan assets [Line Items] |
|
|
| Bonds |
1,063
|
1,017
|
| Corporate Bonds [Member] | U.K. [Member] |
|
|
| Disclosure of fair value of plan assets [Line Items] |
|
|
| Bonds |
15
|
|
| Corporate Bonds [Member] | All Other Countries [Member] |
|
|
| Disclosure of fair value of plan assets [Line Items] |
|
|
| Bonds |
151
|
112
|
| Government Bonds [Member] | U.S. [member] |
|
|
| Disclosure of fair value of plan assets [Line Items] |
|
|
| Bonds |
292
|
634
|
| Government Bonds [Member] | All Other Countries [Member] |
|
|
| Disclosure of fair value of plan assets [Line Items] |
|
|
| Bonds |
38
|
17
|
| Other Fixed Income [Member] |
|
|
| Disclosure of fair value of plan assets [Line Items] |
|
|
| Bonds |
255
|
256
|
| Multi-Asset [Member] |
|
|
| Disclosure of fair value of plan assets [Line Items] |
|
|
| Multi-asset |
288
|
135
|
| Quoted Plan Assets [Member] |
|
|
| Disclosure of fair value of plan assets [Line Items] |
|
|
| Equities |
248
|
269
|
| Bonds |
84
|
309
|
| Property |
4
|
4
|
| Derivatives |
6
|
|
| Cash and cash equivalents |
41
|
12
|
| Other |
8
|
1
|
| Total |
392
|
596
|
| Quoted Plan Assets [Member] | U.S. [member] |
|
|
| Disclosure of fair value of plan assets [Line Items] |
|
|
| Equities |
141
|
157
|
| Quoted Plan Assets [Member] | U.K. [Member] |
|
|
| Disclosure of fair value of plan assets [Line Items] |
|
|
| Equities |
3
|
3
|
| Quoted Plan Assets [Member] | All Other Countries [Member] |
|
|
| Disclosure of fair value of plan assets [Line Items] |
|
|
| Equities |
104
|
109
|
| Quoted Plan Assets [Member] | Corporate Bonds [Member] | U.S. [member] |
|
|
| Disclosure of fair value of plan assets [Line Items] |
|
|
| Bonds |
3
|
226
|
| Quoted Plan Assets [Member] | Corporate Bonds [Member] | All Other Countries [Member] |
|
|
| Disclosure of fair value of plan assets [Line Items] |
|
|
| Bonds |
3
|
3
|
| Quoted Plan Assets [Member] | Government Bonds [Member] | U.S. [member] |
|
|
| Disclosure of fair value of plan assets [Line Items] |
|
|
| Bonds |
3
|
3
|
| Quoted Plan Assets [Member] | Government Bonds [Member] | All Other Countries [Member] |
|
|
| Disclosure of fair value of plan assets [Line Items] |
|
|
| Bonds |
5
|
4
|
| Quoted Plan Assets [Member] | Other Fixed Income [Member] |
|
|
| Disclosure of fair value of plan assets [Line Items] |
|
|
| Bonds |
70
|
73
|
| Quoted Plan Assets [Member] | Multi-Asset [Member] |
|
|
| Disclosure of fair value of plan assets [Line Items] |
|
|
| Multi-asset |
1
|
1
|
| Unquoted Plan Assets [Member] |
|
|
| Disclosure of fair value of plan assets [Line Items] |
|
|
| Equities |
430
|
591
|
| Bonds |
1,730
|
1,727
|
| Insurance |
34
|
36
|
| Derivatives |
625
|
679
|
| Cash and cash equivalents |
292
|
97
|
| Other |
|
7
|
| Total |
3,398
|
3,271
|
| Unquoted Plan Assets [Member] | U.S. [member] |
|
|
| Disclosure of fair value of plan assets [Line Items] |
|
|
| Equities |
39
|
65
|
| Unquoted Plan Assets [Member] | All Other Countries [Member] |
|
|
| Disclosure of fair value of plan assets [Line Items] |
|
|
| Equities |
391
|
526
|
| Unquoted Plan Assets [Member] | Corporate Bonds [Member] | U.S. [member] |
|
|
| Disclosure of fair value of plan assets [Line Items] |
|
|
| Bonds |
1,060
|
791
|
| Unquoted Plan Assets [Member] | Corporate Bonds [Member] | All Other Countries [Member] |
|
|
| Disclosure of fair value of plan assets [Line Items] |
|
|
| Bonds |
148
|
109
|
| Unquoted Plan Assets [Member] | Government Bonds [Member] | U.S. [member] |
|
|
| Disclosure of fair value of plan assets [Line Items] |
|
|
| Bonds |
289
|
631
|
| Unquoted Plan Assets [Member] | Government Bonds [Member] | All Other Countries [Member] |
|
|
| Disclosure of fair value of plan assets [Line Items] |
|
|
| Bonds |
33
|
13
|
| Unquoted Plan Assets [Member] | Other Fixed Income [Member] |
|
|
| Disclosure of fair value of plan assets [Line Items] |
|
|
| Bonds |
185
|
183
|
| Unquoted Plan Assets [Member] | Multi-Asset [Member] |
|
|
| Disclosure of fair value of plan assets [Line Items] |
|
|
| Multi-asset |
$ 287
|
$ 134
|