Acquisitions - Summary of Acquisition Activity (Detail) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Disclosure of detailed information about business combination [abstract] | ||
| Businesses acquired | $ 0 | $ 166 |
| Less: Cash acquired | 0 | (4) |
| Businesses acquired, net of cash | 0 | 162 |
| Investments in businesses | 12 | 1 |
| Asset acquisitions | 3 | 0 |
| Contingent consideration payments | 3 | 4 |
| Total | $ 18 | $ 167 |