CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions		3 Months Ended
		Apr. 02, 2017	Apr. 03, 2016
Statement of Comprehensive Income [Abstract]
Net income before allocation to noncontrolling interests	[1],[2],[3],[4]	$ 3,130	$ 3,048
Foreign currency translation adjustments, net	[4]	228	67
Other comprehensive income (loss), foreign currency transaction and translation adjustment, before tax	[4]	228	67
Unrealized holding losses on derivative financial instruments, net	[4]	(9)	(273)
Reclassification adjustments for realized gains	[4],[5]	(241)	(339)
Other comprehensive income (loss), derivatives qualifying as hedges, before tax, total	[4]	(251)	(612)
Unrealized holding gains on available-for-sale securities, net	[4]	150	129
Reclassification adjustments for realized losses	[4],[5]	137	209
Other comprehensive income (loss), available-for-sale securities adjustment, before tax, total	[4]	287	339
Benefit plans: actuarial gains, net	[4]	1	0
Reclassification adjustments related to amortization	[4],[6]	163	139
Reclassification adjustments related to settlements, net	[4],[6]	52	26
Other	[4]	45	38
Defined benefit plan, amounts recognized in other comprehensive income (loss), net gain (loss), before tax, total	[4]	261	203
Benefit plans: prior service costs and other, net	[4]	0	0
Reclassification adjustments related to amortization	[4],[6]	(45)	(41)
Reclassification adjustments related to curtailments, net	[4],[6]	(7)	(6)
Other	[4]	1	5
Defined benefit plan, amounts recognized in other comprehensive income (loss), net prior service cost, before tax	[4]	(52)	(42)
Other comprehensive income/(loss), before tax	[4]	474	(44)
Tax provision/(benefit) on other comprehensive income/(loss)	[4],[7]	25	(41)
Other comprehensive income/(loss) before allocation to noncontrolling interests	[4]	449	(4)
Comprehensive income before allocation to noncontrolling interests	[4]	3,579	3,044
Less: Comprehensive income attributable to noncontrolling interests	[4]	15	4
Comprehensive income attributable to Pfizer Inc.	[4]	$ 3,563	$ 3,040

[1] Amounts for the three months ended April 3, 2016 have been revised from previously reported amounts to reflect the adoption of a new accounting standard in the fourth quarter of 2016, as of January 1, 2016. For additional information, see Note 1B. Basis of Presentation and Significant Accounting Policies––Adoption of New Accounting Standards.

[2] Amounts may not add due to rounding.

[3] Amounts may not add due to rounding.

[4] Amounts may not add due to rounding.

[5] Reclassified into Other (income)/deductions—net and Cost of sales in the condensed consolidated statements of income.

[6] Generally reclassified, as part of net periodic pension cost, into Cost of sales, Selling, informational and administrative expenses, and/or Research and development expenses, as appropriate, in the condensed consolidated statements of income. For additional information, see Note 10. Pension and Postretirement Benefit Plans.

[7] See Note 5C. Tax Matters: Tax Provision/(Benefit) on Other Comprehensive Income/(Loss).