INCOME TAXES - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax [Line Items]
Net deferred tax benefit to reverse previously recorded deferred tax liability for unrepatriated earnings and to account for transition rule under the new law	$ 822,000,000
Provisional deferred tax expense reltaed to remeasurement of deferred tax asset	516,000,000
Deferred tax benefit	170,000,000	$ 576,000,000	$ 271,000,000
Current income tax liability		560,000,000
Increase (decrease) of valuation allowances	(1,600,000,000)	(33,000,000)	3,900,000,000
Capital losses	620,000,000	0
Foreign tax credit carryforward, amount	2,427,000,000	2,226,000,000
Tax expense (benefit) recorded for interest and penalties	0	0	1,000,000
Accrued for payment of interest and penalties	0	0	1,000,000
Reserve for uncertain tax positions related to the current year	11,000,000	$ (4,000,000)	$ 19,000,000
U.S.
Income Tax [Line Items]
Operating loss carryforwards	4,037,000,000
Operating loss carryforwards subject to annual limitation	197,000,000
Capital losses	$ 1,800,000,000
Capital loss carryforward carryover period	5 years
Canada
Income Tax [Line Items]
Capital losses	$ 836,000,000
Her Majesty's Revenue and Customs (HMRC)
Income Tax [Line Items]
Supplementary charge, percent	10.00%	20.00%	32.00%
Deferred tax benefit	$ 238,000,000	$ 414,000,000