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Revenue From Contracts With Customers Contract Balances (Details) - USD ($) $ in Millions | Jan. 02, 2021 | Dec. 28, 2019
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Revenue from Contract with Customer [Abstract] |  |
Product returns reserve | $ 15.6 | $ 11.4
Customer markdowns reserve | 3.7 | 4.4
Other sales incentives reserve | 6.0 | 2.3
Customer rebates liability | 13.4 | 12.0
Customer advances liability | $ 8.2 | $ 7.2

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- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. + References 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 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
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- Definition Customer Markdowns Reserve + References No definition available. + Details
Name: | www_CustomerMarkdownsReserve
Namespace Prefix: | www_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition Customer Rebates Liability + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition Amount of estimated sales returns + References No definition available. + Details
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- Definition Sales Incentives Reserve + References No definition available. + Details
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Balance Type: | credit
Period Type: | instant