Capital - Details of Share Repurchases (Detail) - USD ($) $ / shares in Units, $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Disclosure of share repurchases [abstract] | ||
| Share repurchases | $ 1,400 | $ 200 |
| Shares repurchased | 12.8 | 2.6 |
| Share repurchases - average price per share in U.S. dollars | $ 109.42 | $ 78.37 |