Fair Value Measurement - Schedule of Financial Liabilities Not Measured at Fair Value on Recurring Basis (Details) - USD ($)
$ in Millions |
Dec. 31, 2021 |
Dec. 31, 2020 |
| Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |
|
|
| Current portion of long term debt |
$ 38
|
$ 37
|
| Long term debt |
2,830
|
4,041
|
| Total debt, net |
2,868
|
4,078
|
| Carrying Value [Member] |
|
|
| Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |
|
|
| Current portion of long term debt |
38
|
|
| Long term debt |
2,830
|
|
| Total debt, net |
2,868
|
|
| Carrying Value [Member] | Alight Holdings [Member] |
|
|
| Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |
|
|
| Current portion of long term debt |
|
37
|
| Long term debt |
|
4,041
|
| Total debt, net |
|
4,078
|
| Fair Value [Member] |
|
|
| Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |
|
|
| Current portion of long term debt |
38
|
|
| Long term debt |
2,834
|
|
| Total debt, net |
$ 2,872
|
|
| Fair Value [Member] | Alight Holdings [Member] |
|
|
| Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |
|
|
| Current portion of long term debt |
|
37
|
| Long term debt |
|
4,090
|
| Total debt, net |
|
$ 4,127
|