Income Taxes (Schedule of Deferred Taxes Balance Sheet Location) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 27, 2019	Dec. 28, 2018
Deferred Tax Assets, Gross, Noncurrent	$ 315.1	$ 20.5
Deferred Tax Assets, Net, Noncurrent	304.1
Deferred income taxes (non-current liability)	(11.0)	(324.3)
Deferred Tax Liabilities, Net		$ 303.8
Increase (Decrease), Deferred Tax Liability Due to Amortization of Intangible Assets	$ 37.8