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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (PARENTHETICAL) - USD ($) $ in Millions | 9 Months Ended
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Sep. 30, 2018 | Oct. 01, 2017
Statement of Cash Flows [Abstract] |  |  |
TCJA benefit | $ 410 | $ 0 | [1],[2]
[1] | Amounts may not add due to rounding.
[2] | As a result of the enactment of the TCJA in December 2017, Pfizer’s Provision for taxes on income for the nine months ended September 30, 2018 was favorably impacted by approximately $410 million, primarily related to certain tax initiatives associated with the TCJA, as well as favorable adjustments to the provisional estimates of the legislation. See Note 5A. Tax Matters: Taxes on Income from Continuing Operations.

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