Identifiable Intangible Assets and Goodwill - Goodwill (Detail) $ in Millions		6 Months Ended
		Jun. 28, 2015 USD ($)
Goodwill [Roll Forward]
Balance, December 31, 2014	[1]	$ 42,069
Balance, June 28, 2015	[1]	41,571
Operating Segments [Member]
Goodwill [Roll Forward]
Balance, December 31, 2014		42,069
Additions		39
Other	[2]	(537)
Balance, June 28, 2015		41,571
Global Innovative Pharmaceutical [Member]
Goodwill [Roll Forward]
Balance, December 31, 2014		13,032
Additions		0
Other	[2]	(161)
Balance, June 28, 2015		12,871
Global Vaccines, Oncology and Consumer Healthcare [Member]
Goodwill [Roll Forward]
Balance, December 31, 2014		11,398
Additions		39
Other	[2]	(156)
Balance, June 28, 2015		11,281
Global Established Pharmaceutical [Member]
Goodwill [Roll Forward]
Balance, December 31, 2014		17,639
Additions		0
Other	[2]	(220)
Balance, June 28, 2015		$ 17,419

[1] Amounts may not add due to rounding.

[2] Primarily reflects the impact of foreign exchange.