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Accounts Receivable (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2018 | Jul. 01, 2017 | Jun. 30, 2018 | Jul. 01, 2017 | Dec. 30, 2017
Accounts Receivables [Abstract] |  |  |  |  |
Sale of accounts receivable, maximum amount under agreement | $ 150.0 |  | $ 150.0 |  |
Sale of accounts receivable percent paid at sale | 90.00% |  | 90.00% |  |
Accounts receivable sold | $ 111.6 | $ 148.4 | $ 224.2 | $ 298.0 |
Fee charged on sale of accounts receivable | 0.6 | 0.5 | 1.1 | 1.0 |
Accounts receivable, reduction due to sale | $ 58.6 | $ 82.2 | $ 58.6 | $ 82.2 | $ 70.1

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- Definition Reflects the net positive or negative amount derived from subtracting from net proceeds of sale, the carrying amounts, net of allocated reserves, of accounts receivable transferred to a third party in a transaction that qualifies for sales treatment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109247956&loc=d3e107425-111719 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The amounts of accounts receivable balance reduced as of the balance sheet date due to the sale of accounts receivable. + References No definition available. + Details
Name: | www_AccountsReceivableReductionDueToSale
Namespace Prefix: | www_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
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- Definition The amount of accounts receivable sold at their stated amount. + References No definition available. + Details
Name: | www_AccountsReceivableSold
Namespace Prefix: | www_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
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- Definition Accounts Receivables [Abstract] + References No definition available. + Details
Name: | www_AccountsReceivablesAbstract
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- Definition The maximum amount of accounts receivable to be sold under the agreement. + References No definition available. + Details
Name: | www_SaleOfAccountsReceivableMaximumAmountUnderAgreement
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Data Type: | xbrli:monetaryItemType
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- Definition For receivables sold uner the agreement, the percent of the stated amount paid in cash at time of sale. + References No definition available. + Details
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Namespace Prefix: | www_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant