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. 31, 2016	Jan. 02, 2016
Pension Plan [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Accrued Compensation and Employee Benefits	$ 2.8	$ 2.7
Pension and Other Post Retirement Benefits	93.8	90.3
Pension plan balance sheet total	96.6	93.0
Net Actuarial Loss	54.5	51.1
Prior Service Cost	1.2	1.2
Amounts Recognized in Accumulated Other Comprehensive Loss	55.7	52.3
Postretirement Health Coverage [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Accrued Compensation and Employee Benefits	1.1	1.2
Pension and Other Post Retirement Benefits	12.7	15.6
Pension plan balance sheet total	13.8	16.8
Net Actuarial Loss	$ 0.4	$ 2.9