Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 26, 2020	Dec. 28, 2019	Dec. 29, 2018
Allowance for Doubtful Accounts, Current and Long-term [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ 78.6	$ 62.5	$ 55.9
Charged to Cost and Expenses	13.5	28.6	20.4
Deductions - write-offs, less recoveries	(29.4)	(12.4)	(10.1)
Translation Adjustments	2.4	(0.1)	(3.7)
Balance at End of Period	65.1	78.6	62.5
SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	315.6	284.6	235.5
Charged to Cost and Expenses	37.7	62.3	51.8
Translation Adjustments	(28.2)	(31.3)	(2.7)
Balance at End of Period	$ 283.4	$ 315.6	$ 284.6