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Business Segments - Company's Long-Lived Assets (Primarily Property, Plant and Equipment) (Detail) - USD ($) $ in Millions | Dec. 28, 2019 | Dec. 29, 2018 | Dec. 30, 2017
--- | --- | --- | ---
Segment Reporting Information [Line Items] |  |  |
Long-lived assets | $ 301.8 | $ 130.9 | $ 136.7
United States [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Long-lived assets | 247.2 | 117.1 | 122.4
Foreign [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Long-lived assets | $ 54.6 | $ 13.8 | $ 14.3

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- Definition Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e9038-108599 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | srt_StatementGeographicalAxis=country_US
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_StatementGeographicalAxis=www_TotalFromForeignCountriesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |