INVESTMENTS - Mortgage Loans (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period			$ 129
Balance, end of period	$ 209	$ 83	209	$ 83
Commercial mortgages:
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	140	58	123	57
Current-period provision for expected credit losses	63	19	80	20
Write-offs charged against the allowance	0	0	0	0
Recoveries of amounts previously written off	0	0	0	0
Net change in allowance	63	19	80	20
Balance, end of period	203	77	203	77
Agricultural mortgages:
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	5	6	6	5
Current-period provision for expected credit losses	1	0	0	1
Write-offs charged against the allowance	0	0	0	0
Recoveries of amounts previously written off	0	0	0	0
Net change in allowance	1	0	0	1
Balance, end of period	6	6	6	6
Residential mortgages:
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	0	0	0	0
Current-period provision for expected credit losses	0	0	0	0
Write-offs charged against the allowance	0	0	0	0
Recoveries of amounts previously written off	0	0	0	0
Net change in allowance	0	0	0	0
Balance, end of period	$ 0	$ 0	$ 0	$ 0