Summary of Assets and Liabilities Classified As Held For Disposition (Detail) - Baxalta Inc - Discontinued Operations, Held-for-disposition - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Accounts and other current receivables, net	$ 48	$ 228
Inventories		8
Property, plant, and equipment, net	1	2
Other	1	7
Total assets of the disposal group	50	245
Accounts payable and accrued liabilities	3	46
Total liabilities of the disposal group	$ 3	$ 46