Retirement Plans (Schedule Of Amounts Recognized in Balance Sheet of Defined Benefit Plans) (Details) - Pension Plan - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2022	Jan. 01, 2022
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Other Noncurrent Assets	$ 2.1	$ 0.8
Accrued Compensation and Benefits	(4.4)	(4.9)
Pension and Other Post Retirement Benefits	(91.8)	(104.2)
Pension plan balance sheet total	(94.1)	(108.3)
Net Actuarial Gain	21.2	20.5
Prior Service Cost	0.4	0.7
Amounts Recognized in Accumulated Other Comprehensive Loss	$ 21.6	$ 21.2

Amount, before tax, after reclassification adjustment, of (increase) decrease in accumulated other comprehensive income for defined benefit plan.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 10A
-Subparagraph (i-k)
-URI https://asc.fasb.org/extlink&oid=126968391&loc=SL7669646-108580

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (i)
-URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 11
-URI https://asc.fasb.org/extlink&oid=126968391&loc=d3e637-108580

Reference 4: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 55
-Paragraph 17
-URI https://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921

Name:	us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration