EBITDA to Income from Continuing Operations Reconciliation (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Segment Reporting [Abstract]
Total segment EBITDA	$ 879	$ 802	$ 2,470	$ 2,167
Reconciling items
Depreciation and amortization	(184)	(204)	(562)	(599)
Stock compensation	(31)	(30)	(77)	(84)
Net interest expense	(14)	(14)	(41)	(53)
Restructuring charges, net	(31)	(130)	(50)	(237)
Venezuela deconsolidation			(33)
Net realized gains on Baxalta Retained Shares transactions				4,387
Net loss on debt extinguishment		(52)		(153)
Other Corporate items	(329)	(244)	(783)	(753)
Income from continuing operations before income taxes	$ 290	$ 128	$ 924	$ 4,675