Goodwill and Other Intangible Assets (Product Rights and License by Therapeutic Category) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2015	Dec. 31, 2016
Schedule of Product Rights and Licenses by Therapeutic Class [Line Items]
Finite-lived intangible assets, net		$ 14,432.6		$ 13,526.7
Product rights and licenses
Schedule of Product Rights and Licenses by Therapeutic Class [Line Items]
Finite-lived intangible assets, net		$ 14,389.2		13,382.7
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		$ 2,453.7		2,172.0
Product rights and licenses | Dermatological
Schedule of Product Rights and Licenses by Therapeutic Class [Line Items]
Finite-lived intangible assets, net		2,393.0		2,070.2
Product rights and licenses | Gastrointestinal
Schedule of Product Rights and Licenses by Therapeutic Class [Line Items]
Finite-lived intangible assets, net		2,050.0		1,906.2
Product rights and licenses | Diabetes and Metabolism
Schedule of Product Rights and Licenses by Therapeutic Class [Line Items]
Finite-lived intangible assets, net		1,425.6		1,395.7
Product rights and licenses | Cardiovascular
Schedule of Product Rights and Licenses by Therapeutic Class [Line Items]
Finite-lived intangible assets, net		1,779.5		1,718.0
Product rights and licenses | Respiratory and Allergy
Schedule of Product Rights and Licenses by Therapeutic Class [Line Items]
Finite-lived intangible assets, net		1,769.5		1,691.0
Product rights and licenses | Infectious Disease
Schedule of Product Rights and Licenses by Therapeutic Class [Line Items]
Finite-lived intangible assets, net		494.8		490.6
Product rights and licenses | Oncology
Schedule of Product Rights and Licenses by Therapeutic Class [Line Items]
Finite-lived intangible assets, net		380.1		413.4
Product rights and licenses | Women's Healthcare
Schedule of Product Rights and Licenses by Therapeutic Class [Line Items]
Finite-lived intangible assets, net		371.4		371.4
Product rights and licenses | Immunology
Schedule of Product Rights and Licenses by Therapeutic Class [Line Items]
Finite-lived intangible assets, net		301.5		284.9
Product rights and licenses | Other
Schedule of Product Rights and Licenses by Therapeutic Class [Line Items]
Finite-lived intangible assets, net	[1]	$ 970.1		$ 869.3

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