Retirement and Post Retirement Health Care Plans (Schedule Of Amounts Recognized in Balance Sheet of Defined Benefit Plans) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017
Pension Plan
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Accrued Compensation and Employee Benefits	$ 3.4	$ 2.9
Pension and Other Post Retirement Benefits	87.7	89.8
Pension plan balance sheet total	91.1	92.7
Net Actuarial (Gain) Loss	52.3	51.3
Prior Service Cost	1.4	1.0
Amounts Recognized in Accumulated Other Comprehensive Loss	53.7	52.3
Postretirement Health Coverage
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Accrued Compensation and Employee Benefits	0.7	0.9
Pension and Other Post Retirement Benefits	8.5	11.2
Pension plan balance sheet total	9.2	12.1
Net Actuarial (Gain) Loss	$ 3.7	$ 0.9