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Identifiable Intangible Assets and Goodwill - Indefinite-lived Intangible Assets Percentage of Total Intangibles (Details)
Mar. 29, 2015
Trade Names [Member] | Global Innovative Pharmaceutical [Member]  
Indefinite-lived Intangible Assets [Line Items]  
Percentage of total identifiable intangible assets, less accumulated amortization 0.00%pfe_IntangibleAssetsNetPercentageofIntangibleAssetsNet
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember
/ us-gaap_StatementBusinessSegmentsAxis
= pfe_GlobalInnovativePharmaceuticalMember
Trade Names [Member] | Global Vaccines, Oncology and Consumer Healthcare [Member]  
Indefinite-lived Intangible Assets [Line Items]  
Percentage of total identifiable intangible assets, less accumulated amortization 69.00%pfe_IntangibleAssetsNetPercentageofIntangibleAssetsNet
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember
/ us-gaap_StatementBusinessSegmentsAxis
= pfe_GlobalVaccinesOncologyandConsumerHealthcareMember
Trade Names [Member] | Global Established Pharmaceutical [Member]  
Indefinite-lived Intangible Assets [Line Items]  
Percentage of total identifiable intangible assets, less accumulated amortization 31.00%pfe_IntangibleAssetsNetPercentageofIntangibleAssetsNet
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember
/ us-gaap_StatementBusinessSegmentsAxis
= pfe_GlobalEstablishedPharmaceuticalMember
In Process Research and Development [Member] | Global Innovative Pharmaceutical [Member]  
Indefinite-lived Intangible Assets [Line Items]  
Percentage of total identifiable intangible assets, less accumulated amortization 7.00%pfe_IntangibleAssetsNetPercentageofIntangibleAssetsNet
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_InProcessResearchAndDevelopmentMember
/ us-gaap_StatementBusinessSegmentsAxis
= pfe_GlobalInnovativePharmaceuticalMember
In Process Research and Development [Member] | Global Vaccines, Oncology and Consumer Healthcare [Member]  
Indefinite-lived Intangible Assets [Line Items]  
Percentage of total identifiable intangible assets, less accumulated amortization 38.00%pfe_IntangibleAssetsNetPercentageofIntangibleAssetsNet
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_InProcessResearchAndDevelopmentMember
/ us-gaap_StatementBusinessSegmentsAxis
= pfe_GlobalVaccinesOncologyandConsumerHealthcareMember
In Process Research and Development [Member] | Global Established Pharmaceutical [Member]  
Indefinite-lived Intangible Assets [Line Items]  
Percentage of total identifiable intangible assets, less accumulated amortization 55.00%pfe_IntangibleAssetsNetPercentageofIntangibleAssetsNet
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_InProcessResearchAndDevelopmentMember
/ us-gaap_StatementBusinessSegmentsAxis
= pfe_GlobalEstablishedPharmaceuticalMember