Revenue from Contracts with Customers - Rollforward of Variable Consideration Reserves (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 26, 2025	Sep. 27, 2024
Movement In Contract With Customer Liability [Roll Forward]
Beginning balance	$ 228.8	$ 227.4
Acquisitions (Note 3)	397.4
Provisions	1,563.5	1,265.7
Payments or credits	(1,527.4)	(1,257.6)
Ending balance	662.3	235.5
Rebates and Chargebacks
Movement In Contract With Customer Liability [Roll Forward]
Beginning balance	197.5	201.6
Acquisitions (Note 3)	286.6
Provisions	1,493.4	1,206.2
Payments or credits	(1,451.7)	(1,206.9)
Ending balance	525.8	200.9
Product Returns
Movement In Contract With Customer Liability [Roll Forward]
Beginning balance	14.8	14.5
Acquisitions (Note 3)	91.2
Provisions	18.9	15.9
Payments or credits	(16.3)	(15.8)
Ending balance	108.6	14.6
Other Sales Deductions
Movement In Contract With Customer Liability [Roll Forward]
Beginning balance	16.5	11.3
Acquisitions (Note 3)	19.6
Provisions	51.2	43.6
Payments or credits	(59.4)	(34.9)
Ending balance	$ 27.9	$ 20.0