REDEEMABLE NONCONTROLLING INTERESTS (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Temporary Equity [Line Items]
Dividends accrued during the period	$ 4	$ 11	$ 8	$ 24
Redeemable subsidiary preferred equity	174		174		$ 170
Redeemable noncontrolling interest	$ 15		$ 15		$ 20
LIBOR
Temporary Equity [Line Items]
Cash interest rate (as a percent)	7.50%		7.50%
Percent higher than the rate payable if dividends were paid in cash (as a percent)	0.50%		0.50%
Minimum
Temporary Equity [Line Items]
Cash interest rate (as a percent)	0.75%		0.75%