INCOME TAXES - Net Deferred Tax Liability (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Deferred tax assets:
Deferred income	$ 13	$ 105
U.S. and state net operating losses	1,230	1,095
Capital losses	620	0
Foreign net operating losses	6	1,424
Tax credits and other tax incentives	28	62
Foreign tax credits	2,427	2,226
Accrued expenses and liabilities	110	153
Asset retirement obligation	629	875
Property and equipment	0	1,189
Other	42	0
Total deferred tax assets	5,105	7,129
Valuation allowance	(3,816)	(5,401)	$ (5,434)	$ (1,564)
Net deferred tax assets	1,289	1,728
Deferred tax liabilities:
Investment in foreign subsidiaries	0	1,872
Equity investments	18	23
Property and equipment	1,798	1,533
Other	0	5
Total deferred tax liabilities	1,816	3,433
Net deferred income tax liability	$ 527	$ 1,705