Revenue - Reserves for Discounts and Allowances (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance	$ 1,091.6	$ 1,062.0	$ 1,035.0
Current provisions relating to sales in current year	3,637.4	3,535.3	3,474.7
Adjustments relating to prior years	(80.5)	(16.5)	(19.6)
Payments/credits relating to sales in current year	(2,635.8)	(2,661.2)	(2,519.8)
Payments/credits relating to sales in prior years	(801.9)	(828.0)	(908.3)
Ending balance	1,210.8	1,091.6	1,062.0
Discounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance	162.7	173.3	153.8
Current provisions relating to sales in current year	832.4	824.2	735.6
Adjustments relating to prior years	2.2	8.0	(0.4)
Payments/credits relating to sales in current year	(728.3)	(670.9)	(572.9)
Payments/credits relating to sales in prior years	(153.3)	(171.9)	(142.8)
Ending balance	115.7	162.7	173.3
Contractual Adjustments
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance	880.8	857.1	857.7
Current provisions relating to sales in current year	2,773.1	2,687.5	2,720.1
Adjustments relating to prior years	(83.4)	(38.7)	(38.4)
Payments/credits relating to sales in current year	(1,905.8)	(1,989.7)	(1,944.8)
Payments/credits relating to sales in prior years	(618.6)	(635.4)	(737.5)
Ending balance	1,046.1	880.8	857.1
Returns
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance	48.1	31.6	23.5
Current provisions relating to sales in current year	31.9	23.6	19.0
Adjustments relating to prior years	0.7	14.2	19.2
Payments/credits relating to sales in current year	(1.7)	(0.6)	(2.1)
Payments/credits relating to sales in prior years	(30.0)	(20.7)	(28.0)
Ending balance	$ 49.0	$ 48.1	$ 31.6