Employee Benefits - Additional Information (Details) - USD ($) $ in Millions |
6 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
Dec. 31, 2021 |
Jun. 30, 2021 |
Dec. 31, 2022 |
Dec. 31, 2020 |
|
| Defined Contribution Plan Disclosure [Line Items] | ||||
| Defined contribution savings plan expenses | $ 24 | $ 59 | ||
| Alight Holdings | ||||
| Defined Contribution Plan Disclosure [Line Items] | ||||
| Defined contribution savings plan expenses | $ 31 | $ 46 | ||