Restructuring Charges and Other Costs Associated with Acquisitions and Cost-Reduction/Productivity Initiatives (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	99 Months Ended	3 Months Ended														99 Months Ended
	Mar. 31, 2013	Mar. 31, 2013 Primary Care [Member]	Apr. 01, 2012 Primary Care [Member]	Mar. 31, 2013 Specialty Care And Oncology [Member]	Apr. 01, 2012 Specialty Care And Oncology [Member]	Mar. 31, 2013 Established Products and Emerging Markets [Member]	Apr. 01, 2012 Established Products and Emerging Markets [Member]	Mar. 31, 2013 Other Operating Segments [Member]	Apr. 01, 2012 Other Operating Segments [Member]	Mar. 31, 2013 Research and Development Operations [Member]	Apr. 01, 2012 Research and Development Operations [Member]	Mar. 31, 2013 Manufacturing Operations [Member]	Apr. 01, 2012 Manufacturing Operations [Member]	Mar. 31, 2013 Corporate [Member]	Apr. 01, 2012 Corporate [Member]	Mar. 31, 2013 Employee Termination Costs [Member] Employee
Restructuring Cost and Reserve [Line Items]
Estimated Employee Terminations																62,000
Restructuring and Related Activities, Initiation Date																Jan. 01, 2005
Restructuring and Related Activities, Current Date																Mar. 31, 2013
Actual Employees Terminated																54,000
Restructuring charges	$ 15,700	$ (5)	$ 3	$ 6	$ 3	$ 11	$ 3	$ 2	$ 6	$ 2	$ 12	$ 4	$ 152	$ 79	$ 318