Revenues Reserves for Discounts and Allowances (Details 1) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance	$ 1,051.3	$ 761.6	$ 605.5
Current provisions relating to sales in current year	3,698.6	3,389.1	2,917.3
Adjustments relating to prior years	(48.3)	(12.1)	6.0
Payments/returns related to sales in current year	(2,778.6)	(2,440.4)	(2,232.8)
Payments/returns related to sales in prior years	(724.1)	(646.9)	(534.4)
Ending balance	1,198.9	1,051.3	761.6
Discounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance	127.8	109.6	71.6
Current provisions relating to sales in current year	666.2	679.3	583.0
Adjustments relating to prior years	0.3	(0.3)	(0.1)
Payments/returns related to sales in current year	(535.5)	(551.7)	(475.8)
Payments/returns related to sales in prior years	(127.7)	(109.1)	(69.1)
Ending balance	131.1	127.8	109.6
Contractual Adjustments
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance	888.8	606.0	482.7
Current provisions relating to sales in current year	3,011.5	2,686.7	2,307.4
Adjustments relating to prior years	(54.1)	(10.0)	15.0
Payments/returns related to sales in current year	(2,242.9)	(1,887.6)	(1,756.9)
Payments/returns related to sales in prior years	(576.0)	(506.3)	(442.2)
Ending balance	1,027.3	888.8	606.0
Returns
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance	34.7	46.0	51.2
Current provisions relating to sales in current year	20.9	23.1	26.9
Adjustments relating to prior years	5.5	(1.8)	(8.9)
Payments/returns related to sales in current year	(0.2)	(1.1)	(0.1)
Payments/returns related to sales in prior years	(20.4)	(31.5)	(23.1)
Ending balance	$ 40.5	$ 34.7	$ 46.0