INVESTMENTS - Middle Market Loans by Key Credit Quality Indicators (Details) - Middle market loans $ in Millions	Dec. 31, 2022 USD ($)
Financing Receivable, Credit Quality Indicator [Line Items]
2022	$ 648
2021	1,288
2020	801
2019	808
2018	412
Prior	340
Revolving Loans	860
Total Financing Receivable	5,157
BBB Credit Rating
Financing Receivable, Credit Quality Indicator [Line Items]
2022	63
2021	144
2020	70
2019	37
2018	19
Prior	0
Revolving Loans	133
Total Financing Receivable	466
BB Credit Rating
Financing Receivable, Credit Quality Indicator [Line Items]
2022	333
2021	451
2020	300
2019	203
2018	80
Prior	44
Revolving Loans	362
Total Financing Receivable	1,773
B Credit Rating
Financing Receivable, Credit Quality Indicator [Line Items]
2022	252
2021	678
2020	411
2019	483
2018	240
Prior	218
Revolving Loans	311
Total Financing Receivable	2,593
CCC Credit Rating
Financing Receivable, Credit Quality Indicator [Line Items]
2022	0
2021	15
2020	20
2019	85
2018	59
Prior	78
Revolving Loans	53
Total Financing Receivable	310
CC Credit Rating
Financing Receivable, Credit Quality Indicator [Line Items]
2022	0
2021	0
2020	0
2019	0
2018	14
Prior	0
Revolving Loans	1
Total Financing Receivable	15
C and Lower Credit Rating
Financing Receivable, Credit Quality Indicator [Line Items]
2022	0
2021	0
2020	0
2019	0
2018	0
Prior	0
Revolving Loans	0
Total Financing Receivable	$ 0