INVESTMENTS - Commercial mortgage and agricultural property loans by property type (Details) $ in Millions	Sep. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Sep. 30, 2021 USD ($)	Jun. 30, 2021 USD ($)	Dec. 31, 2020 USD ($)
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Commercial mortgage and agricultural property loans			$ 1,509
Allowance for credit losses	$ (5)	$ (4)	(5)	$ (4)	$ (5)	$ (7)
Total net commercial mortgage and agricultural property loans	$ 0		$ 1,504
Total commercial mortgage and agricultural property loans			1.000
CALIFORNIA
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Total commercial mortgage and agricultural property loans			0.34
TEXAS
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Total commercial mortgage and agricultural property loans			0.18
NEW YORK
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Total commercial mortgage and agricultural property loans			0.07
Europe
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Total commercial mortgage and agricultural property loans			0.08
AUSTRALIA
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Total commercial mortgage and agricultural property loans			0.01
Apartments/Multi-Family
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Commercial mortgage and agricultural property loans			$ 385
Total commercial mortgage and agricultural property loans			0.255
Hospitality
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Commercial mortgage and agricultural property loans			$ 17
Total commercial mortgage and agricultural property loans			0.011
Industrial
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Commercial mortgage and agricultural property loans			$ 624
Total commercial mortgage and agricultural property loans			0.415
Office
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Commercial mortgage and agricultural property loans			$ 196
Total commercial mortgage and agricultural property loans			0.130
Other
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Commercial mortgage and agricultural property loans			$ 134
Total commercial mortgage and agricultural property loans			0.089
Retail
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Commercial mortgage and agricultural property loans			$ 102
Total commercial mortgage and agricultural property loans			0.067
Agricultural Property Loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Commercial mortgage and agricultural property loans			$ 51
Allowance for credit losses		0	$ 0	0	0	0
Total commercial mortgage and agricultural property loans			0.033
Total commercial mortgage loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Commercial mortgage and agricultural property loans			$ 1,458
Allowance for credit losses		$ (4)	$ (5)	$ (4)	$ (5)	$ (7)
Total commercial mortgage and agricultural property loans			0.967