FAIR VALUE OF FINANCIAL INSTRUMENTS - Carrying Values and Fair Values of Non-Current Financial Assets and Liabilities (Details) - USD ($) $ in Millions		Dec. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Senior, mezzanine, and other loans		$ 117	$ 125
Other noncurrent liabilities	[1]	(2,236)	(2,372)
Carrying Amount
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Senior, mezzanine, and other loans		117	125
Total noncurrent financial assets		117	125
Senior Notes		(6,441)	(5,928)
Commercial paper		(3,197)	(2,245)
Other long-term debt		(174)	(184)
Other noncurrent liabilities		(196)	(153)
Total noncurrent financial liabilities		(10,008)	(8,510)
Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Senior, mezzanine, and other loans		112	116
Total noncurrent financial assets		112	116
Senior Notes		(6,712)	(5,794)
Commercial paper		(3,197)	(2,245)
Other long-term debt		(179)	(182)
Other noncurrent liabilities		(196)	(153)
Total noncurrent financial liabilities		$ (10,284)	$ (8,374)

[1] See Note 16 for disclosure of related party amounts.