CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) (PARENTHETICAL) - USD ($) $ in Millions		3 Months Ended	6 Months Ended
		Jun. 28, 2020	Jun. 28, 2020	Jun. 30, 2019
TCJA impact	[1],[2]		$ 0	$ (285)
Proceeds from issuance of long-term debt	[1],[3]		16,606	$ 4,942
Subsidiaries [Member] | Upjohn Inc [Member]
Proceeds from issuance of long-term debt		$ 11,400	$ 11,400

[1] Amounts may not add due to rounding.

[2] As a result of the enactment of the TCJA in December 2017, Pfizer’s Provision/(benefit) for taxes on income for the six months ended June 30, 2019 was favorably impacted by approximately $285 million, primarily as a result of additional guidance issued by the U.S. Department of Treasury.

[3] Includes $11.4 billion of proceeds from the Upjohn long-term debt issuances in the second quarter of 2020, which are included in Restricted short-term investments in the condensed consolidated balance sheet. For additional information, see Notes 7A. Financial Instruments: Fair Value Measurements and Financial Instruments: 7D. Long-Term Debt).