Restructuring and Related Charges (Schedule of Restructuring and Related Charges by Segment) (Details) - USD ($) $ in Millions	1 Months Ended	6 Months Ended		11 Months Ended	12 Months Ended
	Dec. 29, 2023	Dec. 30, 2022	Jun. 16, 2022	Nov. 14, 2023	Dec. 31, 2021
Restructuring Cost and Reserve [Line Items]
Total restructuring and related charges	$ 0.0	$ 12.1	$ 9.6	$ 1.7	$ 29.0
Less: accelerated depreciation	0.0	(1.0)	0.0	(0.8)	(2.1)
Restructuring charges, net	0.0	11.1	9.6	0.9	26.9
Specialty Brands [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring and related charges	0.0	0.0	0.0	0.0	0.1
Specialty Generics [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring and related charges	0.0	0.8	3.5	0.0	4.9
Corporate
Restructuring Cost and Reserve [Line Items]
Total restructuring and related charges	$ 0.0	$ 11.3	$ 6.1	$ 1.7	$ 24.0