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Accumulated Other Comprehensive Loss, Excluding Noncontrolling Interests - Footnotes (Detail) (USD $)
In Millions, unless otherwise specified
 12 Months Ended 0 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Jun. 24, 2013
Feb. 06, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]          
Foreign currency translation adjustments attributable to noncontrolling interests $ 3us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentBeforeTaxPortionAttributableToNoncontrollingInterest $ (62)us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentBeforeTaxPortionAttributableToNoncontrollingInterest $ (7)us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentBeforeTaxPortionAttributableToNoncontrollingInterest    
Zoetis [Member]          
Accumulated Other Comprehensive Income (Loss) [Line Items]          
Percentage offered in IPO       80.20%pfe_DiscontinuedOperationsPercentageofOwnershipDisposed
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= pfe_ZoetisDisposalMember		  
IPO [Member] | Zoetis [Member] | Subsidiaries [Member]          
Accumulated Other Comprehensive Income (Loss) [Line Items]          
Percentage offered in IPO         19.80%pfe_DiscontinuedOperationsPercentageofOwnershipDisposed
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= pfe_ZoetisDisposalMember
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_IPOMember