Goodwill and Other Intangible Assets-Goodwill (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Goodwill [Roll Forward]
Beginning balance	$ 44,672
Derecognition	(272)	[1]
Other	(648)	[2]
Ending balance	43,752
Primary Care [Member]
Goodwill [Roll Forward]
Beginning balance	6,152
Derecognition	0	[1]
Other	(97)	[2]
Ending balance	6,055
Specialty Care And Oncology [Member]
Goodwill [Roll Forward]
Beginning balance	16,885
Derecognition	0	[1]
Other	(266)	[2]
Ending balance	16,619
Established Products and Emerging Markets [Member]
Goodwill [Roll Forward]
Beginning balance	18,603
Derecognition	(272)	[1]
Other	(288)	[2]
Ending balance	18,043
Other Operating Segments [Member]
Goodwill [Roll Forward]
Beginning balance	3,032	[3]
Derecognition	0	[1],[3]
Other	3	[2],[3]
Ending balance	$ 3,035	[3]

[1] Reflects the goodwill derecognized as part of the transfer of certain product rights, which constituted a business, to our equity-method investment in China. For additional information, see Note 2D. Acquisitions, Divestitures, Collaborative Arrangement and Equity-Method Investment: Equity-Method Investment.

[2] Primarily reflects the impact of foreign exchange.

[3] Reflects amounts associated with Animal Health (Zoetis) and Consumer Healthcare.