v3.21.2

Share-Based Compensation Expense - Additional Information (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | 9 Months Ended
--- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Jun. 30, 2021 | Sep. 30, 2021 | Sep. 30, 2020
Performance-based RSUs [Member] |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |
Aggregate grant date fair value | $ 114 |  |  |  |
Total future compensation expense | 161 |  |  | $ 161 |
Remaining weighted-average amortization period |  |  |  | 2 years 4 months 24 days |
RSUs [Member] |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |
Aggregate grant date fair value | 116 |  |  |  |
Total future compensation expense | 116 |  |  | $ 116 |
Remaining weighted-average amortization period |  |  |  | 2 years 3 months 18 days |
RSUs and PRSUs[Member] |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |
Share-based compensation | $ 15 | $ 1 | $ 5 |  | $ 5
2021 Omnibus Incentive Plan | Time-based RSUs [Member] |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |
Vesting period | 3 years |  |  |  |
Percentage of units granted subject to vesting requirements | 50.00% |  |  | 50.00% |
2021 Omnibus Incentive Plan | Performance-based RSUs [Member] |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |
Percentage of units granted subject to vesting requirements | 50.00% |  |  | 50.00% |

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