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Identifiable Intangible Assets and Goodwill - Finite-lived Intangible Assets Percentage of Total Intangibles (Details)
Mar. 29, 2015
Developed Technology Rights [Member] | Global Innovative Pharmaceutical [Member]  
Finite-Lived Intangible Assets [Line Items]  
Percentage of total identifiable intangible assets, less accumulated amortization 31.00%pfe_IntangibleAssetsNetPercentageofIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_DevelopedTechnologyRightsMember
/ us-gaap_StatementBusinessSegmentsAxis
= pfe_GlobalInnovativePharmaceuticalMember
Developed Technology Rights [Member] | Global Vaccines, Oncology and Consumer Healthcare [Member]  
Finite-Lived Intangible Assets [Line Items]  
Percentage of total identifiable intangible assets, less accumulated amortization 36.00%pfe_IntangibleAssetsNetPercentageofIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_DevelopedTechnologyRightsMember
/ us-gaap_StatementBusinessSegmentsAxis
= pfe_GlobalVaccinesOncologyandConsumerHealthcareMember
Developed Technology Rights [Member] | Global Established Pharmaceutical [Member]  
Finite-Lived Intangible Assets [Line Items]  
Percentage of total identifiable intangible assets, less accumulated amortization 33.00%pfe_IntangibleAssetsNetPercentageofIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_DevelopedTechnologyRightsMember
/ us-gaap_StatementBusinessSegmentsAxis
= pfe_GlobalEstablishedPharmaceuticalMember
Trade Names [Member] | Global Innovative Pharmaceutical [Member]  
Finite-Lived Intangible Assets [Line Items]  
Percentage of total identifiable intangible assets, less accumulated amortization 0.00%pfe_IntangibleAssetsNetPercentageofIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember
/ us-gaap_StatementBusinessSegmentsAxis
= pfe_GlobalInnovativePharmaceuticalMember
Trade Names [Member] | Global Vaccines, Oncology and Consumer Healthcare [Member]  
Finite-Lived Intangible Assets [Line Items]  
Percentage of total identifiable intangible assets, less accumulated amortization 80.00%pfe_IntangibleAssetsNetPercentageofIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember
/ us-gaap_StatementBusinessSegmentsAxis
= pfe_GlobalVaccinesOncologyandConsumerHealthcareMember
Trade Names [Member] | Global Established Pharmaceutical [Member]  
Finite-Lived Intangible Assets [Line Items]  
Percentage of total identifiable intangible assets, less accumulated amortization 20.00%pfe_IntangibleAssetsNetPercentageofIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember
/ us-gaap_StatementBusinessSegmentsAxis
= pfe_GlobalEstablishedPharmaceuticalMember