Restructuring and Related Charges (Schedule of Restructuring Reserves by Type of Cost) (Details) - Continuing Operations - USD ($) $ in Millions	12 Months Ended
	Dec. 27, 2019	Dec. 28, 2018	Dec. 29, 2017
Restructuring Reserve [Roll Forward]
Beginning Balance	$ 71.0	$ 15.5	$ 14.8
Charges	15.3	109.0	36.7
Changes in estimate from continuing operations	(17.0)	(6.0)	(5.5)
Cash payments	(24.8)	(45.6)	(30.8)
Reclassifications	(9.3)	(1.9)	0.3
Restructuring Reserve, Translation and Other Adjustment	(1.0)
Ending Balance	34.2	71.0	15.5
Acquisition programs
Restructuring Reserve [Roll Forward]
Beginning Balance	7.8	0.8	0.2
Charges	0.1	29.9	0.9
Changes in estimate from continuing operations	(1.0)	(0.7)	0.0
Cash payments	(2.4)	(22.2)	(0.3)
Reclassifications	(4.3)	0.0	0.0
Restructuring Reserve, Translation and Other Adjustment	0.0
Ending Balance	0.2	7.8	0.8
2018 Program
Restructuring Reserve [Roll Forward]
Beginning Balance	2.2	0.0	0.0
Charges	11.2	2.2	0.0
Changes in estimate from continuing operations	(1.4)	0.0	0.0
Cash payments	(9.3)	0.0	0.0
Reclassifications	0.0	0.0	0.0
Restructuring Reserve, Translation and Other Adjustment	0.0
Ending Balance	2.7	2.2	0.0
2016 Program
Restructuring Reserve [Roll Forward]
Beginning Balance	61.0	14.7	9.5
Charges	4.0	76.9	35.8
Changes in estimate from continuing operations	(14.6)	(5.3)	(4.8)
Cash payments	(13.1)	(23.4)	(26.1)
Reclassifications	(5.0)	(1.9)	0.3
Restructuring Reserve, Translation and Other Adjustment	(1.0)
Ending Balance	31.3	61.0	14.7
2013 Program
Restructuring Reserve [Roll Forward]
Beginning Balance	0.0	0.0	5.1
Charges	0.0	0.0	0.0
Changes in estimate from continuing operations	0.0	0.0	(0.7)
Cash payments	0.0	0.0	(4.4)
Reclassifications	0.0	0.0	0.0
Restructuring Reserve, Translation and Other Adjustment	0.0
Ending Balance	$ 0.0	$ 0.0	$ 0.0