CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions		3 Months Ended		6 Months Ended
		Jul. 01, 2018	Jul. 02, 2017	Jul. 01, 2018		Jul. 02, 2017
Income Statement [Abstract]
Revenues	[1]	$ 13,466	$ 12,896	$ 26,373		$ 25,675
Costs and expenses:
Cost of sales	[1],[2]	2,916	2,660	5,479		5,128
Selling, informational and administrative expenses	[1],[2]	3,542	3,430	6,954		6,745
Research and development expenses	[1],[2]	1,797	1,787	3,540		3,502
Amortization of intangible assets	[1]	1,191	1,208	2,387		2,394
Restructuring charges and certain acquisition-related costs	[1]	44	70	87		153
Other (income)/deductions––net	[1]	(551)	(75)	(728)		(14)
Income from continuing operations before provision for taxes on income	[1],[3]	4,527	3,815	8,654		7,767
Provision for taxes on income	[1]	648	739	1,204		1,560
Income from continuing operations	[1]	3,879	3,077	7,450	[4]	6,207	[4]
Discontinued operations––net of tax	[1]	0	2	(1)		1
Net income before allocation to noncontrolling interests	[1],[5],[6]	3,879	3,078	7,449		6,208
Less: Net income attributable to noncontrolling interests	[1]	7	5	16		14
Net income attributable to Pfizer Inc.	[1]	$ 3,872	$ 3,073	$ 7,432		$ 6,194
Earnings per common share––basic:
Income from continuing operations attributable to Pfizer Inc. common shareholders (in dollars per share)	[1]	$ 0.66	$ 0.52	$ 1.26		$ 1.04
Discontinued operations––net of tax (in dollars per share)	[1]	0.00	0.00	0.00		0.00
Net income attributable to Pfizer Inc. common shareholders (in dollars per share)	[1]	0.66	0.52	1.26		1.04
Earnings per common share––diluted:
Income from continuing operations attributable to Pfizer Inc. common shareholders (in dollars per share)	[1]	0.65	0.51	1.24		1.02
Discontinued operations––net of tax (in dollars per share)	[1]	0.00	0.00	0.00		0.00
Net income attributable to Pfizer Inc. common shareholders (in dollars per share)	[1]	$ 0.65	$ 0.51	$ 1.24		$ 1.02
Weighted-average shares––basic	[1]	5,866	5,958	5,911		5,982
Weighted-average shares––diluted	[1]	5,952	6,037	6,004	[4]	6,065	[4]
Cash dividends paid per common share (in dollars per share)	[1]	$ 0.34	$ 0.32	$ 0.68		$ 0.64

[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] Income from continuing operations before provision for taxes on income. IH’s earnings include dividend income of $76 million and $114 million in the second quarter of 2018 and 2017, respectively, and $135 million and $157 million in the first six months of 2018 and 2017, respectively, from our investment in ViiV. For additional information, see Note 4.

[4] These common stock equivalents were outstanding for the periods presented, but were not included in the computation of diluted EPS for those periods because their inclusion would have had an anti-dilutive effect.

[5] Amounts may not add due to rounding.

[6] Amounts may not add due to rounding.