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Summary of Activity in Sales Returns Reserve (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Feb. 01, 2015 | Feb. 02, 2014 | Feb. 03, 2013
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Balance at beginning of year | $ 15,954 wsm_ReserveForEstimatedProductReturnsNetOfCostOfGoodsSold | [1] | $ 14,397 wsm_ReserveForEstimatedProductReturnsNetOfCostOfGoodsSold | [1] | $ 14,151 wsm_ReserveForEstimatedProductReturnsNetOfCostOfGoodsSold | [1]
Provision for sales returns | 311,911 wsm_RevenueRecognitionSalesReturnsReserveForSalesReturnsNetOfCostOfGoodsSold | [1] | 293,929 wsm_RevenueRecognitionSalesReturnsReserveForSalesReturnsNetOfCostOfGoodsSold | [1] | 270,156 wsm_RevenueRecognitionSalesReturnsReserveForSalesReturnsNetOfCostOfGoodsSold | [1]
Actual sales returns | (313,083)wsm_SalesReturnsGoodsNetOfCostOfGoodsSold | [1] | (292,372)wsm_SalesReturnsGoodsNetOfCostOfGoodsSold | [1] | (269,910)wsm_SalesReturnsGoodsNetOfCostOfGoodsSold | [1]
Balance at end of year | $ 14,782 wsm_ReserveForEstimatedProductReturnsNetOfCostOfGoodsSold | [1] | $ 15,954 wsm_ReserveForEstimatedProductReturnsNetOfCostOfGoodsSold | [1] | $ 14,397 wsm_ReserveForEstimatedProductReturnsNetOfCostOfGoodsSold | [1]
[1] | Amounts are shown net of cost of goods sold.

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- Definition Reserve for estimated product returns net of cost of goods sold + References No definition available. + Details
Name: | wsm_ReserveForEstimatedProductReturnsNetOfCostOfGoodsSold
Namespace Prefix: | wsm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition For each income statement presented, the amount of estimated sales returns net of cost of goods sold. + References No definition available. + Details
Name: | wsm_RevenueRecognitionSalesReturnsReserveForSalesReturnsNetOfCostOfGoodsSold
Namespace Prefix: | wsm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The aggregate refunds recognized during an accounting period due to goods returned by customers (other than under warranty provisions) net of cost of goods sold. Returns are a deduction from gross revenue in arriving at net revenue. + References No definition available. + Details
Name: | wsm_SalesReturnsGoodsNetOfCostOfGoodsSold
Namespace Prefix: | wsm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | wsm_SummaryOfSignificantAccountingPoliciesLineItems
Namespace Prefix: | wsm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration