Share-Based Payments - Components of Share-Based Compensation Expense (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||||
|---|---|---|---|---|---|---|
Sep. 30, 2022 |
Sep. 30, 2021 |
Sep. 30, 2022 |
Sep. 30, 2021 |
|||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||
| Share-based compensation expense—direct | [1] | $ 15 | $ 15 | $ 46 | $ 44 | |
| Stock options / stock appreciation rights | ||||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||
| Share-based compensation expense—direct | 2 | 2 | 7 | 7 | ||
| RSUs / DSUs | ||||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||
| Share-based compensation expense—direct | 9 | 8 | 26 | 25 | ||
| PSUs | ||||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||
| Share-based compensation expense—direct | $ 4 | $ 5 | $ 13 | $ 12 | ||
| ||||||