Restructuring and Related Charges (Schedule of Restructuring and Related Charges by Segment) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 27, 2019	Dec. 28, 2018	Dec. 29, 2017
Restructuring Cost and Reserve [Line Items]
Total restructuring and related charges	$ (1.7)	$ 108.2	$ 36.4
Less: accelerated depreciation	0.0	(5.2)	(5.2)
Restructuring charges, net	(1.7)	103.0	31.2
Specialty Brands [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring and related charges	(13.7)	54.6	25.4
Specialty Generics [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring and related charges	10.0	5.3	7.7
Corporate
Restructuring Cost and Reserve [Line Items]
Total restructuring and related charges	$ 2.0	$ 48.3	$ 3.3