Revenues Reserves for Discounts and Allowances (Details 1) $ in Millions	6 Months Ended
	Jun. 30, 2018 USD ($)
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning Balance	$ 761.6
Current Provisions Relating To Sales In Current Year	1,632.6
Adjustments Relating To Prior Years	9.7
Payments/Returns Relating To Sales in Current Year	(954.2)
Payments/Returns Relating To Sales in Prior Year	(584.1)
Ending Balance	865.6
Discounts
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning Balance	109.6
Current Provisions Relating To Sales In Current Year	333.2
Adjustments Relating To Prior Years	(0.3)
Payments/Returns Relating To Sales in Current Year	(222.3)
Payments/Returns Relating To Sales in Prior Year	(101.0)
Ending Balance	119.2
Contractual adjustments
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning Balance	606.0
Current Provisions Relating To Sales In Current Year	1,288.0
Adjustments Relating To Prior Years	7.4
Payments/Returns Relating To Sales in Current Year	(731.9)
Payments/Returns Relating To Sales in Prior Year	(469.6)
Ending Balance	699.9
Returns
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning Balance	46.0
Current Provisions Relating To Sales In Current Year	11.4
Adjustments Relating To Prior Years	2.6
Payments/Returns Relating To Sales in Current Year	0.0
Payments/Returns Relating To Sales in Prior Year	(13.5)
Ending Balance	$ 46.5