Revenues Reserves for Discounts and Allowances (Details 1) $ in Millions	3 Months Ended
	Mar. 31, 2018 USD ($)
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning Balance	$ 761.6
Current Provisions Relating To Sales In Current Year	806.4
Adjustments Relating To Prior Years	3.5
Payments/Returns Relating To Sales in Current Year	(299.7)
Payments/Returns Relating To Sales in Prior Year	(412.5)
Ending Balance	859.3
Discounts
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning Balance	109.6
Current Provisions Relating To Sales In Current Year	159.4
Adjustments Relating To Prior Years	1.2
Payments/Returns Relating To Sales in Current Year	(71.7)
Payments/Returns Relating To Sales in Prior Year	(77.4)
Ending Balance	121.1
Contractual adjustments
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning Balance	606.0
Current Provisions Relating To Sales In Current Year	641.2
Adjustments Relating To Prior Years	2.0
Payments/Returns Relating To Sales in Current Year	(227.7)
Payments/Returns Relating To Sales in Prior Year	(326.4)
Ending Balance	695.1
Returns
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning Balance	46.0
Current Provisions Relating To Sales In Current Year	5.8
Adjustments Relating To Prior Years	0.3
Payments/Returns Relating To Sales in Current Year	(0.3)
Payments/Returns Relating To Sales in Prior Year	(8.7)
Ending Balance	$ 43.1