Acquisitions, Licensing Agreements, Collaborative Arrangements, Divestitures, Equity-Method Investments and Cost-Method Investment - Discontinued Operations - Net of Tax - Footnotes (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Deferred income tax expense (benefit), net	$ 2	$ (3)	$ (23)
Legal Entity Reorganization [Member] | Legal Entity Reorganization [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Deferred income tax expense			$ 122