INVESTMENTS - Equity Method Investments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Equity Method Investments [Roll Forward]
Equity in net income (loss)	$ 3	$ 8	$ 7
Dividends received	(5)	(8)	(7)
Alliance Bernstein
Equity Method Investments [Roll Forward]
Beginning of period	63	63
Equity in net income (loss)	3	8	7
Dividends received	(5)	(8)
Dividend to parent	(61)	0
End of period	$ 0	$ 63	$ 63