Summary of Operating Results Which Have Been Reflected As Discontinued Operations (Detail) - USD ($) $ in Millions		3 Months Ended
	Feb. 01, 2016	Mar. 31, 2017	Mar. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss from discontinued operations, net of tax		$ (1)	$ (7)
Baxalta Inc | Discontinued Operations, Held-for-disposition
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales		4	64
Cost of sales		(4)	(59)
Marketing and administrative expenses		(1)	(20)
Loss from discontinued operations before income taxes		(1)	(15)
Gain on disposal of discontinued operations	$ 17		17
Income tax expense			9
Loss from discontinued operations, net of tax		$ (1)	$ (7)