INVESTMENTS - PREDECESSOR COMPANY - Credit Quality Indicators (Details) $ in Millions	Dec. 31, 2021 USD ($)
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss, Total	$ 1,509
Total commercial mortgage loans
Financing Receivable, Credit Quality Indicator [Line Items]
2021	856
2020	81
2019	48
2018	18
2017	153
Prior	302
Financing Receivable, before Allowance for Credit Loss, Total	1,458
Total commercial mortgage loans | 0%-59.99%
Financing Receivable, Credit Quality Indicator [Line Items]
2021	150
2020	0
2019	21
2018	7
2017	93
Prior	232
Financing Receivable, before Allowance for Credit Loss, Total	503
Total commercial mortgage loans | 60%-69.99%
Financing Receivable, Credit Quality Indicator [Line Items]
2021	389
2020	33
2019	10
2018	11
2017	39
Prior	28
Financing Receivable, before Allowance for Credit Loss, Total	510
Total commercial mortgage loans | 70%-79.99%
Financing Receivable, Credit Quality Indicator [Line Items]
2021	317
2020	48
2019	17
2018	0
2017	21
Prior	21
Financing Receivable, before Allowance for Credit Loss, Total	424
Total commercial mortgage loans | 80% or greater
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	21
Financing Receivable, before Allowance for Credit Loss, Total	21
Total commercial mortgage loans | Greater or Equal to 1.2x
Financing Receivable, Credit Quality Indicator [Line Items]
2021	856
2020	81
2019	48
2018	7
2017	120
Prior	295
Financing Receivable, before Allowance for Credit Loss, Total	1,407
Total commercial mortgage loans | 1.0 - 1.2x
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0
2020	0
2019	0
2018	11
2017	0
Prior	0
Financing Receivable, before Allowance for Credit Loss, Total	11
Total commercial mortgage loans | Less than 1.0x
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0
2020	0
2019	0
2018	0
2017	33
Prior	7
Financing Receivable, before Allowance for Credit Loss, Total	40
Agricultural property loans
Financing Receivable, Credit Quality Indicator [Line Items]
2021	40
2020	1
2019	0
2018	0
2017	3
Prior	7
Financing Receivable, before Allowance for Credit Loss, Total	51
Agricultural property loans | 0%-59.99%
Financing Receivable, Credit Quality Indicator [Line Items]
2021	40
2020	1
2019	0
2018	0
2017	3
Prior	7
Financing Receivable, before Allowance for Credit Loss, Total	51
Agricultural property loans | 60%-69.99%
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	0
Financing Receivable, before Allowance for Credit Loss, Total	0
Agricultural property loans | 70%-79.99%
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	0
Financing Receivable, before Allowance for Credit Loss, Total	0
Agricultural property loans | 80% or greater
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	0
Financing Receivable, before Allowance for Credit Loss, Total	0
Agricultural property loans | Greater or Equal to 1.2x
Financing Receivable, Credit Quality Indicator [Line Items]
2021	40
2020	1
2019	0
2018	0
2017	3
Prior	3
Financing Receivable, before Allowance for Credit Loss, Total	47
Agricultural property loans | 1.0 - 1.2x
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	0
Financing Receivable, before Allowance for Credit Loss, Total	0
Agricultural property loans | Less than 1.0x
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	4
Financing Receivable, before Allowance for Credit Loss, Total	$ 4