Restructuring and Related Charges (Schedule of Restructuring and Related Charges by Segment) (Details) - USD ($) $ in Millions	6 Months Ended		12 Months Ended
	Dec. 30, 2022	Jun. 16, 2022	Dec. 31, 2021	Dec. 25, 2020
Restructuring Cost and Reserve [Line Items]
Total restructuring and related charges	$ 12.1	$ 9.6	$ 29.0	$ 49.8
Less: accelerated depreciation	(1.0)	0.0	(2.1)	(12.3)
Restructuring charges, net	11.1	9.6	26.9	37.5
Specialty Brands [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring and related charges	0.0	0.0	0.1	0.1
Specialty Generics [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring and related charges	0.8	3.5	4.9	0.1
Corporate
Restructuring Cost and Reserve [Line Items]
Total restructuring and related charges	$ 11.3	$ 6.1	$ 24.0	$ 49.6