Asset Impairments, Restructuring, and Other Special Charges (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Unusual or Infrequent Item [Line Items]
Asset Impairment Charges									$ 255.8	$ 226.7	$ 243.2
Severance Costs									126.7	141.0	225.5
Asset impairment, restructuring, and other special charges	$ 147.6	$ 45.5	$ 58.0	$ 131.4	$ 144.9	$ 42.4	$ 72.4	$ 108.0	382.5	367.7	468.7
PUERTO RICO
Unusual or Infrequent Item [Line Items]
Asset Impairment Charges											180.8
Human Pharmaceutical Products [Member]
Unusual or Infrequent Item [Line Items]
Asset Impairment Charges									(13.0)	24.6	204.4
Severance Costs									85.9	81.5	225.5
Animal Health Products [Member]
Unusual or Infrequent Item [Line Items]
Asset Impairment Charges									268.8	202.1	38.8
Severance Costs									$ 40.8	$ 59.5	$ 0.0