Schedule - VALUATION AND QUALIFYING ACCOUNTS (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Losses on Receivables
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning Balance	$ 13	$ 27	$ 34
Charged to Costs and Expenses	32		10
Deductions from Reserves	2	14	17
Ending Balance	43	13	27
Deferred Income Tax Valuation
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning Balance	1,416	1,519	1,282
Charged to Costs and Expenses	280	142	383
Charged to Other Accounts		(1)	(17)
Deductions from Reserves	118	244	129
Ending Balance	$ 1,578	$ 1,416	$ 1,519