Segment Data (Schedule of Segment Reporting Information by Business Segment) (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 29, 2024	Mar. 31, 2023
Net sales		$ 467.8	$ 424.6
Operating Income (Loss)		(17.7)	(102.6)
Depreciation and amortization		(24.8)	(133.2)
Employee Benefits and Share-based Compensation		(1.9)	(2.6)
Restructuring charges, net		(10.2)	(1.2)
Restructuring and related charges, net		(10.2)	(1.9)
Separation Costs		(6.7)	(4.9)
Interest Expense		(59.1)	(162.0)
Interest income		6.8	4.7
Other income (expense), net		3.7	(14.6)
Reorganization items, net		0.0	(5.6)
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest		(66.3)	(280.1)
Specialty Brands
Restructuring and related charges, net		(10.2)	0.0
Specialty Generics
Net sales		210.5	172.6
Corporate, Non-Segment
Corporate and unallocated expenses	[1]	(31.9)	(14.0)
Depreciation and amortization		(35.1)	(145.1)
Separation Costs		(6.7)	(4.9)
Operating Segments
Operating Income (Loss)		68.1	65.2
Operating Segments | Specialty Brands
Net sales		257.3	252.0
Operating Income (Loss)		29.9	32.4
Operating Segments | Specialty Generics
Net sales		210.5	172.6
Operating Income (Loss)		$ 38.2	$ 32.8

[1] Includes administration expenses and certain compensation, legal, environmental and other costs not charged to the Company's reportable segments.