Identifiable Intangible Assets and Goodwill - Finite-lived Intangible Assets Percentage of Total Intangibles (Details)	Sep. 30, 2018
Operating Segments [Member] | Developed Technology Rights [Member] | IH [Member]
Finite-Lived Intangible Assets [Line Items]
Percentage of total identifiable intangible assets, less accumulated amortization	70.00%
Operating Segments [Member] | Developed Technology Rights [Member] | EH [Member]
Finite-Lived Intangible Assets [Line Items]
Percentage of total identifiable intangible assets, less accumulated amortization	29.00%
Operating Segments [Member] | Brands [Member] | IH [Member]
Finite-Lived Intangible Assets [Line Items]
Percentage of total identifiable intangible assets, less accumulated amortization	75.00%
Operating Segments [Member] | Brands [Member] | EH [Member]
Finite-Lived Intangible Assets [Line Items]
Percentage of total identifiable intangible assets, less accumulated amortization	25.00%
Pfizer's Worldwide Research and Development [Member] | Segment Reconciling Items [Member] | Developed Technology Rights [Member]
Finite-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] | Brands [Member]
Finite-Lived Intangible Assets [Line Items]
Percentage of total identifiable intangible assets, less accumulated amortization	0.00%