Identifiable Intangible Assets and Goodwill - Goodwill (Detail) $ in Millions	3 Months Ended
	Apr. 03, 2016 USD ($)
Goodwill [Roll Forward]
Balance, December 31, 2014	$ 48,242	[1]
Balance, April 3, 2016	48,558	[1]
Operating Segments [Member]
Goodwill [Roll Forward]
Balance, December 31, 2014	48,242
Additions	78
Other	238	[2]
Balance, April 3, 2016	48,558
Global Innovative Pharmaceutical [Member] | Operating Segments [Member]
Goodwill [Roll Forward]
Balance, December 31, 2014	12,689
Additions	0
Other	76	[2]
Balance, April 3, 2016	12,765
Global Vaccines, Oncology and Consumer Healthcare [Member] | Operating Segments [Member]
Goodwill [Roll Forward]
Balance, December 31, 2014	11,120
Additions	51
Other	60	[2]
Balance, April 3, 2016	11,231
Global Established Pharmaceutical [Member] | Operating Segments [Member]
Goodwill [Roll Forward]
Balance, December 31, 2014	24,433
Additions	26
Other	102	[2]
Balance, April 3, 2016	$ 24,562

[1] Amounts may not add due to rounding.

[2] Primarily reflects the impact of foreign exchange.