Identifiable Intangible Assets and Goodwill - Indefinite-lived Intangible Assets Percentage of Total Intangibles (Details)	Sep. 30, 2018
IH [Member] | Operating Segments [Member] | Brands [Member]
Indefinite-lived Intangible Assets [Line Items]
Percentage of total identifiable intangible assets, less accumulated amortization	71.00%
IH [Member] | Operating Segments [Member] | In Process Research and Development [Member]
Indefinite-lived Intangible Assets [Line Items]
Percentage of total identifiable intangible assets, less accumulated amortization	64.00%
EH [Member] | Operating Segments [Member] | Brands [Member]
Indefinite-lived Intangible Assets [Line Items]
Percentage of total identifiable intangible assets, less accumulated amortization	29.00%
EH [Member] | Operating Segments [Member] | In Process Research and Development [Member]
Indefinite-lived Intangible Assets [Line Items]
Percentage of total identifiable intangible assets, less accumulated amortization	21.00%
Pfizer's Worldwide Research and Development [Member] | Segment Reconciling Items [Member] | Brands [Member]
Indefinite-lived Intangible Assets [Line Items]
Percentage of total identifiable intangible assets, less accumulated amortization	0.00%
Pfizer's Worldwide Research and Development [Member] | Segment Reconciling Items [Member] | In Process Research and Development [Member]
Indefinite-lived Intangible Assets [Line Items]
Percentage of total identifiable intangible assets, less accumulated amortization	15.00%