Income Taxes (Schedule of Income Tax Receivables and Other Assets) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 27, 2019	Dec. 28, 2018
Income Tax Disclosure [Abstract]
Document Period End Date	Dec. 27, 2019
Other assets	$ 3.1	$ 3.0
Prepaid expenses and other current assets	8.0	16.2
Total	$ 11.1	$ 19.2