Accounting Policies and Practices - Additional Information (Details) - USD ($) $ in Millions |
6 Months Ended | 12 Months Ended | |||
|---|---|---|---|---|---|
Dec. 31, 2021 |
Jun. 30, 2021 |
Dec. 31, 2022 |
Dec. 31, 2020 |
Jul. 01, 2021 |
|
| Accounting Policies And Practices [Line Items] | |||||
| Cash and cash equivalents | $ 372 | $ 250 | |||
| Allowance for expected credit losses | 5 | 9 | |||
| Foreign exchange gains (losses) | (4) | $ 1 | |||
| Business combination tax receivable agreement percentage of benefit deemed to realize | 85.00% | ||||
| Minimum percentage of unrecognized tax benefit likely to be realized | 50.00% | ||||
| Fiduciary assets | $ 1,280 | $ 1,509 | |||
| Alight Holdings | |||||
| Accounting Policies And Practices [Line Items] | |||||
| Allowance for expected credit losses | $ 0 | ||||
| Foreign exchange gains (losses) | $ (9) | $ 2 | |||