INVESTMENTS - Nonaccrual Loans (Details) - USD ($) $ in Millions		Jun. 30, 2023	Dec. 31, 2022
Financing Receivable, Past Due [Line Items]
Total		$ 13,571	$ 13,688
Total, nonaccrual status		655
Total, 90 days or more past due and still accruing		0
Transitional real estate loans
Financing Receivable, Past Due [Line Items]
Total		6,775
Total, nonaccrual status		612
Commercial mortgage loans
Financing Receivable, Past Due [Line Items]
Total		1,756
Total, nonaccrual status		0
Middle market loans
Financing Receivable, Past Due [Line Items]
Total		5,040
Total, nonaccrual status		43
Current
Financing Receivable, Past Due [Line Items]
Total		12,894
Current | Transitional real estate loans
Financing Receivable, Past Due [Line Items]
Total		6,141
Current | Commercial mortgage loans
Financing Receivable, Past Due [Line Items]
Total		1,756
Current | Middle market loans
Financing Receivable, Past Due [Line Items]
Total		4,997
Less Than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Total		207
Less Than 90 Days Past Due | Transitional real estate loans
Financing Receivable, Past Due [Line Items]
Total		207
Less Than 90 Days Past Due | Commercial mortgage loans
Financing Receivable, Past Due [Line Items]
Total		0
Less Than 90 Days Past Due | Middle market loans
Financing Receivable, Past Due [Line Items]
Total		0
90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Total	[1]	470
90 Days or More Past Due | Transitional real estate loans
Financing Receivable, Past Due [Line Items]
Total	[1]	427
90 Days or More Past Due | Commercial mortgage loans
Financing Receivable, Past Due [Line Items]
Total	[1]	0
90 Days or More Past Due | Middle market loans
Financing Receivable, Past Due [Line Items]
Total	[1]	43
Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Total		677
Financial Asset, Past Due | Transitional real estate loans
Financing Receivable, Past Due [Line Items]
Total		634
Financial Asset, Past Due | Commercial mortgage loans
Financing Receivable, Past Due [Line Items]
Total		0
Financial Asset, Past Due | Middle market loans
Financing Receivable, Past Due [Line Items]
Total		$ 43

[1] As of June 30, 2023, there were no loans that were 90 days or more past due that continued to accrue interest