Statement Of Cash Flow Data (Schedule Of Supplemental Disclosure Of Cash Flow Information) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2017	Dec. 30, 2016	Jan. 01, 2016
Supplemental Cash Flow Elements [Abstract]
Interest paid	$ 28.4	$ 27.3	$ 26.5
Income taxes paid	$ 46.6	$ 57.4	$ 54.0