Acquisitions and Divestitures - Assets Acquired and Liabilities Assumed (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	Jul. 01, 2012	Dec. 31, 2011	Jan. 31, 2011 King [Member]		Jan. 31, 2011 Biopharmaceutical operating segments [Member] King [Member]	Jul. 01, 2012 Animal Health and Consumer Healthcare [Member]	Dec. 31, 2011 Animal Health and Consumer Healthcare [Member]	Jan. 31, 2011 Animal Health and Consumer Healthcare [Member] King [Member]
Business Acquisition [Line Items]
Goodwill	$ 44,568	$ 44,569	$ 765	[1]	$ 720	$ 2,894	$ 2,497	$ 45

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