Segment, Geographic and Other Revenue Information - Revenues By Geographic Area (Detail) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Oct. 02, 2016	Sep. 27, 2015	Oct. 02, 2016	Sep. 27, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	[1],[2],[3]	$ 13,045	$ 12,087	$ 39,196	$ 34,804
Percentage Change In Revenue	[3]	8.00%		13.00%
U.S. [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	[3]	$ 6,530	5,565	$ 19,561	14,993
Percentage Change In Revenue	[3]	17.00%		30.00%
Developed Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	[3],[4]	$ 2,218	2,315	$ 6,982	7,006
Percentage Change In Revenue	[3],[4]	(4.00%)		0.00%
Developed Rest Of World [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	[3],[5]	$ 1,711	1,513	$ 4,940	4,562
Percentage Change In Revenue	[3],[5]	13.00%		8.00%
Emerging Markets [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	[3],[6]	$ 2,586	$ 2,694	$ 7,714	$ 8,243
Percentage Change In Revenue	[3],[6]	(4.00%)		(6.00%)

[1] Amounts may not add due to rounding.

[2] Excludes amortization of intangible assets, except as disclosed in Note 9A. Identifiable Intangible Assets and Goodwill: Identifiable Intangible Assets.

[3] On September 3, 2015, we acquired Hospira. Commencing from the acquisition date, our condensed consolidated statement of income includes the operating results of Hospira. As a result, legacy Hospira operations are included in our condensed consolidated statements of income for the third quarter and first nine months of 2016. In accordance with our domestic and international reporting periods, our results of operations and EH's operating results for the third quarter and first nine months of 2015 reflect only one month of legacy Hospira U.S. operations but no financial results from legacy Hospira international operations. On June 24, 2016, we acquired Anacor. Commencing from the acquisition date, our condensed consolidated statement of income includes the operating results of Anacor. As a result, legacy Anacor operations are included in our condensed consolidated statements of income for the third quarter and first nine months of 2016. In accordance with our domestic reporting period, our results of operations and IH's operating results for the third quarter and first nine months of 2016 include approximately three months of legacy Anacor operations. Additionally, on September 28, 2016, we acquired Medivation. Commencing from the acquisition date, our condensed consolidated statement of income includes the operating results of Medivation. As a result, legacy Medivation operations are included in our condensed consolidated statements of income for the third quarter and first nine months of 2016. In accordance with our domestic and international reporting periods, our results of operations and IH's operating results for the third quarter and first nine months of 2016 reflect three business days of legacy Medivation operations, which were immaterial. See Note 2A for additional information.

[4] Developed Europe region includes the following markets: Western Europe, Finland and the Scandinavian countries. Revenues denominated in euros were $1.7 billion and $1.8 billion in the third quarter of 2016 and 2015, respectively, and $5.3 billion and $5.4 billion in the first nine months of 2016 and 2015, respectively.

[5] Developed Rest of World region includes the following markets: Australia, Canada, Japan, New Zealand and South Korea.

[6] Emerging Markets region includes, but is not limited to, the following markets: Asia (excluding Japan and South Korea), Latin America, Africa, Eastern Europe, Central Europe, the Middle East and Turkey.