Restructuring and Related Charges (Schedule of Restructuring Reserves by Type of Cost) (Details) - Continuing Operations - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 25, 2020		Dec. 27, 2019
Restructuring Reserve [Roll Forward]
Beginning Balance	$ 1.0	$ 34.2		$ 71.0
Charges	23.7	28.7		15.3
Restructuring Reserve, Accrual Adjustment	(1.0)	(2.7)		(17.0)
Payments for Restructuring	(12.8)	(51.0)		(24.8)
Reclassifications		(10.0)	[1]	(9.3)	[2]
Restructuring Reserve, Translation and Other Adjustment		1.8		(1.0)
Ending Balance	10.9	1.0		34.2
Acquisition programs
Restructuring Reserve [Roll Forward]
Beginning Balance	0.0	0.2		7.8
Charges	0.0	0.0		0.1
Restructuring Reserve, Accrual Adjustment	0.0	(1.9)		(1.0)
Payments for Restructuring	0.0	(0.2)		(2.4)
Reclassifications		0.0	[1]	(4.3)	[2]
Restructuring Reserve, Translation and Other Adjustment		1.9		0.0
Ending Balance	0.0	0.0		0.2
2018 Program
Restructuring Reserve [Roll Forward]
Beginning Balance	1.0	2.7		2.2
Charges	23.7	28.6		11.2
Restructuring Reserve, Accrual Adjustment	(1.0)	(0.4)		(1.4)
Payments for Restructuring	(12.8)	(20.1)		(9.3)
Reclassifications		(10.0)	[1]	0.0	[2]
Restructuring Reserve, Translation and Other Adjustment		0.2		0.0
Ending Balance	10.9	1.0		2.7
2016 Program
Restructuring Reserve [Roll Forward]
Beginning Balance	0.0	31.3		61.0
Charges	0.0	0.1		4.0
Restructuring Reserve, Accrual Adjustment	0.0	(0.4)		(14.6)
Payments for Restructuring	0.0	(30.7)		(13.1)
Reclassifications		0.0	[1]	(5.0)	[2]
Restructuring Reserve, Translation and Other Adjustment		(0.3)		(1.0)
Ending Balance	$ 0.0	$ 0.0		$ 31.3

[1] Represents the reclassification of certain restructuring reserve balances to LSTC as a result of the Company rejecting certain of its executory contracts

[2] Represents the reclassification of lease liabilities, net to lease liabilities and lease assets, which are reflected within other liabilities and other assets on the consolidated balance sheet, due to the adoption of Accounting Standard Update (ASU) 2016-02.