Revenues Reserves for Discounts and Allowances (Details 1) $ in Millions	9 Months Ended
	Sep. 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	2,466.5
Adjustments Relating To Prior Years	(7.2)
Payments/Returns Relating To Sales in Current Year	(1,660.3)
Payments/Returns Relating To Sales in Prior Year	(624.8)
Ending Balance	935.8
Discounts
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning Balance	109.6
Current Provisions Relating To Sales In Current Year	498.9
Adjustments Relating To Prior Years	(0.3)
Payments/Returns Relating To Sales in Current Year	(373.7)
Payments/Returns Relating To Sales in Prior Year	(107.8)
Ending Balance	126.7
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	1,949.6
Adjustments Relating To Prior Years	(7.0)
Payments/Returns Relating To Sales in Current Year	(1,285.8)
Payments/Returns Relating To Sales in Prior Year	(495.2)
Ending Balance	767.6
Returns
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning Balance	46.0
Current Provisions Relating To Sales In Current Year	18.0
Adjustments Relating To Prior Years	0.1
Payments/Returns Relating To Sales in Current Year	(0.8)
Payments/Returns Relating To Sales in Prior Year	(21.8)
Ending Balance	$ 41.5