Goodwill and Other Intangible Assets (Product Rights and License by Therapeutic Category) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2016	Dec. 31, 2017
Schedule of Product Rights and Licenses by Therapeutic Class [Line Items]
Finite-lived intangible assets, net		$ 13,039.0		$ 14,432.6
Product rights and licenses
Schedule of Product Rights and Licenses by Therapeutic Class [Line Items]
Finite-lived intangible assets, net		$ 12,994.7		14,389.2
Therapeutic class disclosure threshold		5.00%	5.00%
Product rights and licenses | Central Nervous System and Anesthesia
Schedule of Product Rights and Licenses by Therapeutic Class [Line Items]
Finite-lived intangible assets, net		$ 2,148.9		2,453.7
Product rights and licenses | Dermatological
Schedule of Product Rights and Licenses by Therapeutic Class [Line Items]
Finite-lived intangible assets, net		2,125.7		2,393.0
Product rights and licenses | Gastrointestinal
Schedule of Product Rights and Licenses by Therapeutic Class [Line Items]
Finite-lived intangible assets, net		1,790.9		2,050.0
Product rights and licenses | Diabetes and Metabolism
Schedule of Product Rights and Licenses by Therapeutic Class [Line Items]
Finite-lived intangible assets, net		1,232.4		1,425.6
Product rights and licenses | Cardiovascular
Schedule of Product Rights and Licenses by Therapeutic Class [Line Items]
Finite-lived intangible assets, net		1,541.9		1,779.5
Product rights and licenses | Respiratory and Allergy
Schedule of Product Rights and Licenses by Therapeutic Class [Line Items]
Finite-lived intangible assets, net		2,084.1		1,769.5
Product rights and licenses | Infectious Disease
Schedule of Product Rights and Licenses by Therapeutic Class [Line Items]
Finite-lived intangible assets, net		596.0		494.8
Product rights and licenses | Oncology
Schedule of Product Rights and Licenses by Therapeutic Class [Line Items]
Finite-lived intangible assets, net		206.0		380.1
Product rights and licenses | Women's Healthcare
Schedule of Product Rights and Licenses by Therapeutic Class [Line Items]
Finite-lived intangible assets, net		315.1		371.4
Product rights and licenses | Immunology
Schedule of Product Rights and Licenses by Therapeutic Class [Line Items]
Finite-lived intangible assets, net		258.8		301.5
Product rights and licenses | Other
Schedule of Product Rights and Licenses by Therapeutic Class [Line Items]
Finite-lived intangible assets, net	[1]	$ 694.9		$ 970.1

[1] her consists of numerous therapeutic classes, none of which individually exceeds 5% of total product rights and licenses.A