Acquisitions and Divestitures - Assets Acquired and Liabilities Assumed (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
	Oct. 02, 2011	Oct. 02, 2011	Sep. 30, 2012	Dec. 31, 2011	Jan. 31, 2011 King [Member]
Business Acquisition [Line Items]
Working capital, excluding inventories					$ 155
Inventories					340
Property, plant and equipment					412
Identifiable intangible assets, excluding in-process research and development					1,806
In-process research and development					303
Net tax accounts					(328)
All other long-term assets and liabilities, net					102
Total identifiable net assets					2,790
Goodwill			44,370	44,569	765	[1]
Net assets acquired					3,555
Discontinued Operation, Deferred Tax Effect Of Income (Loss) From Disposal Of Discontinued Operation	$ 162	$ 162

[1] Goodwill recorded as of the acquisition date totaled $720 million for our three biopharmaceutical operating segments and $45 million for our Animal Health operating segment. (Since the acquisition of King, we have revised our operating segments. See Note 13A. Segment, Geographic and Other Revenue Information: Segment Information.)