NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Equity Investments (Details) - USD ($)		3 Months Ended		9 Months Ended
	Aug. 29, 2019	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Schedule of Equity Method Investments [Line Items]
Equity investments, net of cumulative impairment		$ 33,000,000		$ 33,000,000		$ 25,000,000
Cumulative impairment		2,000,000		2,000,000
Impairment recorded		0	$ 10,000,000	2,000,000	$ 10,000,000
Income (loss) from equity method investments		$ (12,000,000)	$ (14,000,000)	$ (38,000,000)	$ (44,000,000)
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Schedule of Equity Method Investments [Line Items]
Equity interest percentage	20.00%	20.00%		20.00%
Payments to Acquire Equity Method Investments	$ 346,000,000
Income (loss) from equity method investments		$ 1,000,000		$ 1,000,000