INCOME TAXES - Reconciliation of Tax of Income Before Income Taxes and Total Tax Expense (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Income tax expense (benefit) at U.S. statutory rate	$ 321	$ (589)	$ (4,259)
State income tax, less federal effect	(6)	(19)	(7)
Taxes related to foreign operations	(105)	303	(662)
Tax credits	(33)	(1)	(6)
Tax on distributed foreign earnings	0	80	726
Tax on deemed repatriation of foreign earnings	419	0	0
Foreign tax credits	(201)	(136)	(2,090)
Deferred tax on undistributed foreign earnings	(1,872)	(31)	1,903
Tax impact of goodwill adjustments	0	0	82
Change in U.K. tax rate	0	(238)	(414)
Change in U.S. tax rate	516	0	0
Net change in tax contingencies	(1)	(19)	20
Canadian USD functional currency election	0	158	0
Sale of Canadian assets	279	0	0
Sale of North Sea GTP assets	(48)	0	0
Valuation allowances	161	10	3,746
All other, net	(15)	40	(49)
Total	$ (585)	$ (442)	$ (1,010)