Acquisitions, Divestitures, Collaborative Arrangement and Equity-Method Investment - Discontinued Operations - Net of Tax (Detail) (USD $) Share data in Thousands, unless otherwise specified	3 Months Ended		6 Months Ended				3 Months Ended				6 Months Ended				0 Months Ended
	Jun. 30, 2013	Jul. 01, 2012	Jun. 30, 2013	Jul. 01, 2012	Dec. 31, 2012	Jun. 24, 2013 Zoetis [Member]	Jun. 30, 2013 Nutrition [Member]		Jul. 01, 2012 Nutrition [Member]		Jun. 30, 2013 Nutrition [Member]		Jul. 01, 2012 Nutrition [Member]		Jun. 24, 2013 Zoetis [Member]	Feb. 06, 2013 IPO [Member] Zoetis [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Subsidiary or equity method investee, cumulative number of shares issued for all transactions																99,015
Treasury Stock, Value	$ 59,515,000,000		$ 59,515,000,000		$ 40,122,000,000	$ 11,400,000,000
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Revenues							1,112,000,000	[1]	1,675,000,000		2,201,000,000	[1]	3,230,000,000	[1]
Pre-tax income from discontinued operations							189,000,000		422,000,000		389,000,000		796,000,000
Provision for taxes on income							48,000,000		162,000,000	[1]	99,000,000		287,000,000
Income from discontinued operations––net of tax	141,000,000	260,000,000	290,000,000	509,000,000			141,000,000		260,000,000		290,000,000		509,000,000
Pre-tax gain on sale of discontinued operations							10,539,000,000		0		10,539,000,000		0
Provision for taxes on income							121,000,000		0		121,000,000		0
Gain on disposal of discontinued operations––net of tax	10,418,000,000	0	10,418,000,000	0			10,418,000,000		0		10,418,000,000		0		10,400,000,000
Discontinued operations-net of tax	10,559,000,000	260,000,000	10,708,000,000	509,000,000			10,559,000,000		260,000,000		10,708,000,000		509,000,000
Deferred tax expense (benefit)							26,000,000		41,000,000		19,000,000		20,000,000
Disposal Group, Including Discontinued Operation, Balance Sheet Disclosures [Abstract]
Accounts receivable, less allowance for doubtful accounts	0		0		922,000,000
Inventory, Net	0		0		1,137,000,000
Other current assets	0		0		550,000,000
Property, plant and equipment, less accumulated depreciation	100,000,000		100,000,000		1,318,000,000
Goodwill	0		0		1,011,000,000
Identifiable intangible assets, less accumulated amortization	0		0		867,000,000
Other noncurrent assets	0		0		139,000,000
Assets of discontinued operations and other assets held for sale	100,000,000		100,000,000		5,944,000,000
Current liabilities	0		0		874,000,000
Other liabilities	21,000,000		21,000,000		568,000,000
Liabilities of discontinued operations	$ 21,000,000		$ 21,000,000		$ 1,442,000,000

[1] Includes the Animal Health (Zoetis) business for all periods presented and the Nutrition business for the three and six months ended July 1, 2012.