DEBT AND FINANCING COSTS - Components of Financing Costs, Net (Detail) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Jan. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Debt Disclosure [Abstract]
Interest expense		$ 441	$ 457	$ 464
Amortization of debt issuance costs		9	9	8
Capitalized interest		(44)	(51)	(48)
Loss on extinguishment of debt	$ 1	94	1	1
Interest income		(22)	(19)	(8)
Financing costs, net		$ 478	$ 397	$ 417