Segment, Geographic and Other Revenue Information - Revenues By Geographic Area (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Apr. 01, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]
Other Nonoperating Income (Expense)	$ (128)		$ (175)
Revenues	13,500		14,885
Developed Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	3,029	[1]	3,537	[1]
Certain significant items [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	0	[2]	0	[2]
Euro [Member] | Developed Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	2,300		2,600
Earnings [Member] | Certain significant items [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Other Nonoperating Income (Expense)	$ (16)		$ (25)

[1] Developed Europe region includes the following markets: Western Europe, Finland and the Scandinavian countries. Revenues denominated in euros were $2.3 billion in the first quarter of 2013 and $2.6 billion in the first quarter of 2012.

[2] Certain significant items are substantive, unusual items that, either as a result of their nature or size, would not be expected to occur as part of our normal business on a regular basis. For Earnings in the first quarter of 2013, certain significant items includes: (i) restructuring charges and implementation costs associated with our cost-reduction initiatives that are not associated with an acquisition of $217 million, (ii) net credits for certain legal matters of $87 million, (iii) certain asset impairment charges of $396 million, (iv) gain associated with the transfer of certain product rights to our equity-method investment in China of $490 million, (v) costs associated with the separation of Zoetis of $76 million and (vi) other charges of $16 million. For additional information, see Note 2D. Acquisitions, Divestitures, Collaborative Arrangement and Equity-Method Investment: Equity-Method Investment, Note 3. Restructuring Charges and Other Costs Associated with Acquisitions and Cost-Reduction/Productivity Initiatives and Note 4. Other Deductions––Net.For Earnings in the first quarter of 2012, certain significant items includes: (i) restructuring charges and implementation costs associated with our cost-reduction initiatives that are not associated with an acquisition of $817 million, (ii) charges for certain legal matters of $775 million, (iii) certain asset impairment charges of $412 million, (iv) costs associated with the separation of Zoetis of $38 million and (v) other charges of $25 million. For additional information, see Note 3. Restructuring Charges and Other Costs Associated with Acquisitions and Cost-Reduction/Productivity Initiatives and Note 4. Other Deductions––Net.For R&D in all periods presented, certain significant items primarily reflect additional depreciation––asset restructuring and implementation costs.