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Summary of Significant Accounting Policies - Additional Information (Detail) | 12 Months Ended
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Jan. 02, 2016 | Jan. 03, 2015 | Dec. 28, 2013
Accounting Policies [Line Items] |  |  |
Weeks in fiscal year | 52 | 53 | 52
Minimum [Member] | Building and improvements [Member] |  |  |
Accounting Policies [Line Items] |  |  |
Depreciable life | 14 years |  |
Minimum [Member] | Leasehold Improvements [Member] |  |  |
Accounting Policies [Line Items] |  |  |
Depreciable life | 5 years |  |
Minimum [Member] | Machinery, equipment and software [Member] |  |  |
Accounting Policies [Line Items] |  |  |
Depreciable life | 3 years |  |
Maximum [Member] | Building and improvements [Member] |  |  |
Accounting Policies [Line Items] |  |  |
Depreciable life | 20 years |  |
Maximum [Member] | Leasehold Improvements [Member] |  |  |
Accounting Policies [Line Items] |  |  |
Depreciable life | 10 years |  |
Maximum [Member] | Machinery, equipment and software [Member] |  |  |
Accounting Policies [Line Items] |  |  |
Depreciable life | 10 years |  |

X
- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Accounting Policies [Line Items] + References No definition available. + Details
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Namespace Prefix: | www_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of full weeks in the fiscal year. + References No definition available. + Details
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Namespace Prefix: | www_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |