Litigation (Pricing and Medicaid Litigation) (Narrative) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Loss Contingencies [Line Items]
Payments for Legal Settlements	$ 472.7
Other current liabilities	2,528.4	$ 2,964.5
Pricing and Medicaid Litigation
Loss Contingencies [Line Items]
Payments for Legal Settlements	23.5
Pricing and Medicaid Litigation | Mylan Specialty | Indemnification agreement
Loss Contingencies [Line Items]
Other current liabilities	$ 42.2