Identifiable Intangible Assets and Goodwill - Goodwill (Detail) - USD ($) $ in Millions		9 Months Ended
		Oct. 02, 2016	Dec. 31, 2015
Goodwill [Roll Forward]
Balance, December 31, 2015	[1]	$ 48,242
Additions	[2]	7,415
Other	[3]	624
Balance, October 2, 2016	[1]	56,281
IH [Member] | Operating Segments [Member]
Goodwill [Roll Forward]
Balance, December 31, 2015		23,809
Additions	[2]	7,403
Other	[3]	494
Balance, October 2, 2016		31,706
EH [Member] | Operating Segments [Member]
Goodwill [Roll Forward]
Balance, December 31, 2015		24,433
Additions	[2]	12
Other	[3]	130
Balance, October 2, 2016		24,575
Held-for-sale [Member] | HIS [Member]
Goodwill [Roll Forward]
Reclassification of goodwill to assets held for sale		$ 243	$ 0

[1] Amounts may not add due to rounding.

[2] IH additions primarily relate to our acquisitions of Medivation, Anacor and Bamboo and are subject to change until we complete the valuations of assets acquired and liabilities assumed from Medivation, Anacor and Bamboo (see Note 2A).

[3] Primarily reflects the impact of foreign exchange and, with respect to EH, the impact of the reclassification of $243 million to Assets held for sale during the third quarter of 2016 (see Note 2B).