1.0.0.3 false Entity Information (USD $) In Billions, except Share data false 1 $ false false Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 USDperShare Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 false 2 $ false false Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 false 3 $ false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 4 2 dei_EntityInformationLineItems dei false na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false false 0 0 false false No definition available. false 5 3 dei_EntityRegistrantName dei false na duration normalizedstring No definition available. false false false false false false false false false 1 false false 0 0 PFIZER INC PFIZER INC false false 2 false false 0 0 false false 3 false false 0 0 false false No definition available. No authoritative reference available. false 6 3 dei_EntityCentralIndexKey dei false na duration na No definition available. false false false false false false false false false 1 false false 0 0 0000078003 0000078003 false false 2 false false 0 0 false false 3 false false 0 0 false false No definition available. No authoritative reference available. false 7 3 dei_CurrentFiscalYearEndDate dei false na duration monthday No definition available. false false false false false false false false false 1 false false 0 0 --12-31 --12-31 false false 2 false false 0 0 false false 3 false false 0 0 false false No definition available. No authoritative reference available. false 8 3 dei_EntityWellKnownSeasonedIssuer dei false na duration na No definition available. false false false false false false false false false 1 false false 0 0 Yes Yes false false 2 false false 0 0 false false 3 false false 0 0 false false No definition available. No authoritative reference available. false 9 3 dei_EntityVoluntaryFilers dei false na duration na No definition available. false false false false false false false false false 1 false false 0 0 No No false false 2 false false 0 0 false false 3 false false 0 0 false false No definition available. No authoritative reference available. false 10 3 dei_EntityCurrentReportingStatus dei false na duration na No definition available. false false false false false false false false false 1 false false 0 0 Yes Yes false false 2 false false 0 0 false false 3 false false 0 0 false false No definition available. No authoritative reference available. false 11 3 dei_EntityFilerCategory dei false na duration na No definition available. false false false false false false false false false 1 false false 0 0 Large Accelerated Filer Large Accelerated Filer false false 2 false false 0 0 false false 3 false false 0 0 false false No definition available. No authoritative reference available. false 12 3 dei_EntityPublicFloat dei false credit instant monetary No definition available. false false false false false false false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 true true 102000000000 102 false false No definition available. No authoritative reference available. false 14 2 dei_EntityListingsLineItems dei false na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false false 0 0 false false No definition available. false 15 3 dei_EntityCommonStockSharesOutstanding dei false na instant shares No definition available. false false false false false false false false false 1 false false 0 0 false false 2 false true 8070372772 8070372772.00 false false 3 false false 0 0 false false No definition available. No authoritative reference available. false false 3 11 false Billions NoRounding UnKnown false true