Segment Data (Schedule of Segment Reporting Information by Business Segment) (Details) - USD ($) $ in Millions	3 Months Ended						6 Months Ended		9 Months Ended
	Sep. 29, 2023		Sep. 30, 2022		Sep. 30, 2022		Jun. 16, 2022		Sep. 29, 2023
Net sales	$ 497.0		$ 550.4		$ 465.4		$ 874.6		$ 1,396.6
Operating Income (Loss)	(282.0)		(199.0)		(144.2)		(57.8)		(441.2)
Depreciation and amortization	(125.6)		(182.1)		(136.6)		(281.8)		(388.1)
Employee Benefits and Share-based Compensation	(2.4)		(0.5)		(0.5)		(1.7)		(7.7)
Restructuring charges, net	(0.1)		3.3		2.2		9.6		0.9
Restructuring and related charges, net	0.1		(3.3)		(2.2)		(9.6)		(1.7)
Separation Costs	(142.1)		(16.1)		(6.9)		(9.0)		(157.3)
Bad Debt Expense, Customer Bankruptcy, Pre-Petition Amount			(5.8)		(5.8)		0.0		0.0
Non-restructuring impairment charges	(135.9)		0.0		0.0		0.0		(135.9)
Specialty Generics
Net sales	210.8		188.7		161.9		287.5		578.3
Restructuring and related charges, net	0.0		0.2		0.2		(3.5)		0.0
Corporate, Non-Segment
Corporate and unallocated expenses	(16.3)	[1]	(15.9)	[2]	(15.0)	[1]	(48.2)	[2]	(29.7)	[2]
Depreciation and amortization	(137.0)		(196.9)		(148.5)		(321.8)		(423.2)
Separation Costs	(142.1)	[3]	(16.1)	[4]	(6.9)	[3]	(9.0)	[4]	(157.3)	[4]
Operating Segments
Operating Income (Loss)	151.6		39.5		34.7		332.5		313.5
Operating Segments | Specialty Brands
Net sales	286.2		361.7		303.5		587.1		818.3
Operating Income (Loss)	87.6		48.2		43.7		267.2		181.6
Operating Segments | Specialty Generics
Net sales	210.8		188.7		161.9		287.5		578.3
Operating Income (Loss)	$ 64.0		$ (8.7)		$ (9.0)		$ 65.3		$ 131.9

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

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

[3] Represents costs primarily related to professional fees incurred by the Company (including where the Company is responsible for the fees of third parties) in connection with its evaluation of its financial situation and related discussions with its stakeholders prior to the commencement of the 2023 Chapter 11 Cases, expenses incurred related to the severance of certain former executives of the Predecessor, in addition to professional fees and costs incurred as the Company explores potential sales of non-core assets to enable further deleveraging post-emergence from the 2020 Chapter 11 Cases. As of the Petition Date, professional fees directly related to the 2023 Chapter 11 Cases that were previously reflected as liabilities management and separation costs are being classified on a go-forward basis as reorganization items, net.

[4] Represents costs primarily related to professional fees incurred by the Company (including where the Company is responsible for the fees of third parties) in connection with its evaluation of its financial situation and related discussions with its stakeholders prior to the commencement of the 2023 Chapter 11 Cases, expenses incurred related to the Predecessor directors' and officers' insurance policies and severance for the former CEO and certain former executives of the Predecessor, in addition to professional fees and costs incurred as the Company explores potential sales of non-core assets to enable further deleveraging post-emergence from the 2020 Chapter 11 Cases. As of the Petition Date, professional fees directly related to the 2023 Chapter 11 Cases that were previously reflected as liabilities management and separation costs are being classified on a go-forward basis as reorganization items, net.