Certain Changes in Total Equity (Detail) (USD $)	9 Months Ended													0 Months Ended	9 Months Ended
	Sep. 29, 2013		Sep. 29, 2013 Foreign Currency Translation Adjustment [Member]		Sep. 29, 2013 Derivative Financial Instruments [Member]		Sep. 29, 2013 Available-For-Sale Securities [Member]		Sep. 29, 2013 Accumulated Defined Benefit Plans Adjustment, Actuarial Gains / (Losses) [Member]		Sep. 29, 2013 Accumulated Defined Benefit Plans Adjustment, Prior Service (Costs) / Credits and Other [Member]		Jun. 24, 2013 Zoetis [Member]	Feb. 06, 2013 Zoetis [Member] IPO [Member]	Sep. 29, 2013 Zoetis [Member] Exchange offer [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Proceeds from issuance of common stock														$ 2,300,000,000
Noncontrolling interest, ownership percentage by noncontrolling owners														19.80%
Treasury Stock, Value, Acquired, Cost Method	11,600,000,000														11,400,000,000
Noncontrolling Interest, Ownership Percentage by Parent													80.20%
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, December 31, 2012	(5,953,000,000)		(177,000,000)		(88,000,000)		163,000,000		(6,110,000,000)		259,000,000
Other comprehensive income/(loss)(a)	(430,000,000)	[1]	(920,000,000)	[1]	163,000,000	[1]	(116,000,000)	[1]	477,000,000	[1]	(34,000,000)	[1]
Balance, September 29, 2013	$ (6,383,000,000)		$ (1,097,000,000)		$ 75,000,000		$ 47,000,000		$ (5,633,000,000)		$ 225,000,000

[1] Amounts do not include foreign currency translation loss of $65 million attributable to noncontrolling interests for the first nine months of 2013.