Reserves for Discounts and Allowances (Details 1) $ in Millions	6 Months Ended
	Jun. 30, 2019 USD ($)
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning Balance	$ 1,051.3
Current Provisions Relating To Sales In Current Year	1,710.4
Adjustments Relating To Prior Years	(42.4)
Payments/Returns Relating To Sales in Current Year	(1,017.8)
Payments/Returns Relating To Sales in Prior Year	(639.0)
Ending Balance	1,062.5
Discounts
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning Balance	127.8
Current Provisions Relating To Sales In Current Year	308.8
Adjustments Relating To Prior Years	(0.4)
Payments/Returns Relating To Sales in Current Year	(189.6)
Payments/Returns Relating To Sales in Prior Year	(121.9)
Ending Balance	124.7
Contractual adjustments
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning Balance	888.8
Current Provisions Relating To Sales In Current Year	1,391.0
Adjustments Relating To Prior Years	(41.9)
Payments/Returns Relating To Sales in Current Year	(827.6)
Payments/Returns Relating To Sales in Prior Year	(505.2)
Ending Balance	905.1
Returns
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning Balance	34.7
Current Provisions Relating To Sales In Current Year	10.6
Adjustments Relating To Prior Years	(0.1)
Payments/Returns Relating To Sales in Current Year	(0.6)
Payments/Returns Relating To Sales in Prior Year	(11.9)
Ending Balance	$ 32.7