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
	Jan. 01, 2022	Jan. 02, 2021
Pension Plan
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Other Noncurrent Assets	$ 0.8	$ 0.0
Accrued Compensation and Benefits	(4.9)	(4.1)
Pension and Other Post Retirement Benefits	(104.2)	(64.1)
Pension plan balance sheet total	(108.3)	(68.2)
Net Actuarial Gain	20.5	43.7
Prior Service Cost	0.7	0.9
Amounts Recognized in Accumulated Other Comprehensive Loss	21.2	44.6
Postretirement Health Coverage
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Accrued Compensation and Benefits	0.9	0.5
Pension and Other Post Retirement Benefits	7.5	5.4
Pension plan balance sheet total	8.4	5.9
Net Actuarial Gain	(2.7)	(3.2)
Prior Service Cost	0.0	(0.9)
Amounts Recognized in Accumulated Other Comprehensive Loss	$ (2.7)	$ (4.1)