ACCUMULATED OTHER COMPREHENSIVE LOSS - Changes in Accumulated Other Comprehensive Loss by Component (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Before Tax, beginning balance	$ 40	$ (20)	$ (17)
Before Tax	(17)	60	(3)
Before Tax, ending balance	23	40	(20)
Tax (Expense) Benefit, beginning balance	(55)	(43)	(42)
Tax (Expense) Benefit	2	(12)	(1)
Tax (Expense) Benefit, ending balance	(53)	(55)	(43)
Balance	689	1,081	1,188
Total other comprehensive (loss) income, net of tax	(15)	48	(4)
Balance	659	689	1,081
Foreign currency translation
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Before Tax	(9)	15	(6)
Tax (Expense) Benefit	0	0	0
Total other comprehensive (loss) income, net of tax	(9)	15	(6)
Pension and OPEB liability adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Before Tax	1	34	4
Tax (Expense) Benefit	0	(8)	(2)
Total other comprehensive (loss) income, net of tax	1	26	2
Available-for-sale securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Before Tax	(9)	11	(1)
Tax (Expense) Benefit	2	(4)	1
Total other comprehensive (loss) income, net of tax	(7)	7	0
Accumulated Other Comprehensive Loss, net of tax
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance	(15)	(63)	(59)
Balance	$ (30)	$ (15)	$ (63)