Revenue - Reserves for Discounts and Allowances (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance	$ 1,035.0	$ 935.3	$ 1,276.0
Current provisions relating to sales in current year	3,474.7	3,394.4	3,700.6
Adjustments relating to prior years	(19.6)	(8.6)	(103.4)
Payments/credits relating to sales in current year	(2,519.8)	(2,576.8)	(2,882.8)
Payments/credits relating to sales in prior years	(908.3)	(709.3)	(1,055.1)
Ending balance	1,062.0	1,035.0	935.3
Discounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance	153.8	137.7	141.4
Current provisions relating to sales in current year	735.6	666.6	736.7
Adjustments relating to prior years	(0.4)	(2.8)	(4.0)
Payments/credits relating to sales in current year	(572.9)	(514.9)	(599.3)
Payments/credits relating to sales in prior years	(142.8)	(132.8)	(137.1)
Ending balance	173.3	153.8	137.7
Contractual Adjustments
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance	857.7	759.6	1,093.0
Current provisions relating to sales in current year	2,720.1	2,715.5	2,948.7
Adjustments relating to prior years	(38.4)	1.4	(96.1)
Payments/credits relating to sales in current year	(1,944.8)	(2,060.7)	(2,283.1)
Payments/credits relating to sales in prior years	(737.5)	(558.1)	(902.9)
Ending balance	857.1	857.7	759.6
Returns
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance	23.5	38.0	41.6
Current provisions relating to sales in current year	19.0	12.3	15.2
Adjustments relating to prior years	19.2	(7.2)	(3.3)
Payments/credits relating to sales in current year	(2.1)	(1.2)	(0.4)
Payments/credits relating to sales in prior years	(28.0)	(18.4)	(15.1)
Ending balance	$ 31.6	$ 23.5	$ 38.0