Income Taxes - Schedule of Reconciliation of The Effective Tax Rate (Details) - USD ($)
$ in Millions |
6 Months Ended |
12 Months Ended |
Dec. 31, 2021 |
Jun. 30, 2021 |
Dec. 31, 2022 |
Dec. 31, 2020 |
| Income Tax Contingency [Line Items] |
|
|
|
|
| (Loss) income before income tax expense (benefit) |
$ (23)
|
|
$ (41)
|
|
| Effective Income Tax Rate Reconciliation, Amount [Abstract] |
|
|
|
|
| Provision for income taxes at the statutory rate |
(5)
|
|
(9)
|
|
| State income taxes, net of federal benefit |
3
|
|
3
|
|
| Jurisdictional rate differences |
(11)
|
|
8
|
|
| Changes in valuation allowances |
23
|
|
39
|
|
| Benefit of income not allocated to the Company |
1
|
|
6
|
|
| Income in separate U.S. tax consolidations |
16
|
|
15
|
|
| Non-deductible expenses |
8
|
|
4
|
|
| Tax credits |
(4)
|
|
(7)
|
|
| Change in uncertain tax positions |
(5)
|
|
(28)
|
|
| Other |
(1)
|
|
|
|
| Total income tax expense (benefit) |
$ 25
|
|
$ 31
|
|
| Effective Income Tax Rate Reconciliation, Percent [Abstract] |
|
|
|
|
| Provision for income taxes at the statutory rate |
21.00%
|
|
21.00%
|
|
| State income taxes, net of federal benefit |
(12.00%)
|
|
(7.00%)
|
|
| Jurisdictional rate differences |
49.00%
|
|
(20.00%)
|
|
| Changes in valuation allowances |
(100.00%)
|
|
(95.00%)
|
|
| Benefit of income not allocated to the Company |
(4.00%)
|
|
(14.00%)
|
|
| Income in separate U.S. tax consolidations |
(68.00%)
|
|
(37.00%)
|
|
| Non-deductible expenses |
(35.00%)
|
|
(9.00%)
|
|
| Tax credits |
19.00%
|
|
17.00%
|
|
| Change in uncertain tax positions |
24.00%
|
|
68.00%
|
|
| Other |
(3.00%)
|
|
|
|
| Income tax expense (benefit) |
(109.00%)
|
16.00%
|
(76.00%)
|
(10.00%)
|
| Alight Holdings |
|
|
|
|
| Income Tax Contingency [Line Items] |
|
|
|
|
| (Loss) income before income tax expense (benefit) |
|
$ (30)
|
|
$ (94)
|
| Effective Income Tax Rate Reconciliation, Amount [Abstract] |
|
|
|
|
| State income taxes, net of federal benefit |
|
|
|
1
|
| Jurisdictional rate differences |
|
1
|
|
9
|
| Changes in valuation allowances |
|
(2)
|
|
|
| Non-deductible expenses |
|
(2)
|
|
|
| Other |
|
(2)
|
|
(1)
|
| Total income tax expense (benefit) |
|
$ (5)
|
|
$ 9
|
| Effective Income Tax Rate Reconciliation, Percent [Abstract] |
|
|
|
|
| Jurisdictional rate differences |
|
(3.00%)
|
|
(11.00%)
|
| Changes in valuation allowances |
|
6.00%
|
|
|
| Non-deductible expenses |
|
6.00%
|
|
|
| Other |
|
7.00%
|
|
1.00%
|
| Income tax expense (benefit) |
|
16.00%
|
|
(10.00%)
|