REDEEMABLE NONCONTROLLING INTERESTS (Details) - USD ($) $ in Millions		1 Months Ended	3 Months Ended			9 Months Ended
	Jan. 21, 2020	Aug. 31, 2020	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Sep. 30, 2020	Aug. 23, 2019
Temporary Equity [Line Items]
Aggregate redemption price	$ 200	$ 350	$ 13			$ 13
Redemption price, percent	100.00%	100.00%
Accrued and unpaid dividends		$ 4
Total redemption amount		$ 354
Dividends accrued during the period			7	$ 13	$ 10	32
Redeemable subsidiary preferred equity			170			$ 170
Non-controlling equity holder right to sell period (in days)						30 days
Redeemable noncontrolling interest			$ 22			$ 22
30-Day Period Following January 2, 2020
Temporary Equity [Line Items]
Non-controlling equity holder right to sell, fair market sale value							$ 376
Redeemable Preferred Stock
Temporary Equity [Line Items]
Redeemed units (in shares)	200,000	350,000
Floor
Temporary Equity [Line Items]
Cash interest rate			0.75%			0.75%
LIBOR
Temporary Equity [Line Items]
Cash interest rate			7.50%			7.50%
Percent higher than the rate payable if dividends were paid in cash			0.50%			0.50%