Earnings Per Share Attributable to Common Shareholders - Basic Numerator (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Apr. 01, 2012
Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent	80.20%
EPS Numerator-Basic
Income from continuing operations	$ 2,761		$ 1,724
Net Income (Loss) Attributable to Noncontrolling Interest, Adjusted For Earnings Per Share	23	[1]	9	[1]
Income from continuing operations attributable to Pfizer Inc.	2,738		1,715
Less: Preferred stock dividends-net of tax	0		0
Income from continuing operations attributable to Pfizer Inc. common shareholders	2,738		1,715
Discontinued operations-net of tax	4		79
Net income attributable to Pfizer Inc. common shareholders	$ 2,742		$ 1,794
EPS Denominator
Weighted-average number of common shares outstanding-Basic	7,187		7,537
Common-share equivalents: stock options, stock issuable under employee compensation plans and convertible preferred stock	82		61
Weighted-average number of common shares outstanding-Diluted	7,269		7,598
Stock options that had exercise prices greater than the average market price of our common stock issuable under employee compensation plans	97	[2]	223	[2]

[1] Our 80.2%-owned Animal Health subsidiary, Zoetis, has issued securities, under its share-based compensations programs, that enable the holders to obtain Zoetis common stock under certain circumstances and, as such, those shares are included in computing Zoetis' earnings per share information on a standalone basis. The per-share earnings of Zoetis are included in our consolidated earnings per share calculations based on our proportionate share in Zoetis' common stock and common stock equivalents.

[2] These common stock equivalents were outstanding for the three months ended March 31, 2013 and April 1, 2012, but were not included in the computation of diluted EPS for those periods because their inclusion would have had an anti-dilutive effect.