DEBT AND FINANCING COSTS - Components of Financing Costs, Net (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Debt Disclosure [Abstract]
Interest expense	$ 113	$ 113	$ 335	$ 344
Amortization of deferred loan costs	2	3	8	7
Capitalized interest	(11)	(12)	(36)	(39)
Loss on extinguishment of debt	94	0	94	1
Interest income	(6)	(3)	(16)	(13)
Financing costs, net	$ 192	$ 101	$ 385	$ 300