Revenues - Reserves for Discounts and Allowances (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance	$ 1,276.0	$ 1,198.9	$ 1,051.3
Current provisions relating to sales in current year	3,700.6	4,102.5	3,698.6
Adjustments relating to prior years	(103.4)	(53.7)	(48.3)
Payments/credits relating to sales in current year	(2,882.8)	(3,061.2)	(2,778.6)
Payments/credits relating to sales in prior years	(1,055.1)	(910.5)	(724.1)
Ending balance	935.3	1,276.0	1,198.9
Discounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance	141.4	131.1	127.8
Current provisions relating to sales in current year	736.7	774.7	666.2
Adjustments relating to prior years	(4.0)	(1.0)	0.3
Payments/credits relating to sales in current year	(599.3)	(635.1)	(535.5)
Payments/credits relating to sales in prior years	(137.1)	(128.3)	(127.7)
Ending balance	137.7	141.4	131.1
Contractual Adjustments
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance	1,093.0	1,027.3	888.8
Current provisions relating to sales in current year	2,948.7	3,308.8	3,011.5
Adjustments relating to prior years	(96.1)	(54.0)	(54.1)
Payments/credits relating to sales in current year	(2,283.1)	(2,426.1)	(2,242.9)
Payments/credits relating to sales in prior years	(902.9)	(763.0)	(576.0)
Ending balance	759.6	1,093.0	1,027.3
Returns
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance	41.6	40.5	34.7
Current provisions relating to sales in current year	15.2	19.0	20.9
Adjustments relating to prior years	(3.3)	1.3	5.5
Payments/credits relating to sales in current year	(0.4)	0.0	(0.2)
Payments/credits relating to sales in prior years	(15.1)	(19.2)	(20.4)
Ending balance	$ 38.0	$ 41.6	$ 40.5