Revenue From Contracts With Customers Contract Balances (Details) - USD ($) $ in Millions	Sep. 26, 2020	Dec. 28, 2019	Sep. 28, 2019
Revenue from Contracts with Customer [Abstract]
Product Returns Reserve	$ 9.3	$ 11.4	$ 9.5
Customer Markdowns Reserve	4.0	4.4	3.6
Sales Incentives Reserve	4.3	2.3	1.9
Customer Rebates Liability	13.9	12.0	10.8
Customer Advances, Current	$ 2.0	$ 7.2	$ 5.4

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130531-203044

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130549-203045

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130532-203044

Name:	us-gaap_ContractWithCustomerLiability
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant