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Summary of Activity in Sales Returns Reserve (Detail) - USD ($) $ in Thousands		12 Months Ended
		Jan. 28, 2018	Jan. 29, 2017	Jan. 31, 2016
Summary Of Significant Accounting Policies [Line Items]
Balance at beginning of year	[1]	$ 16,058	$ 19,113	$ 14,782
Provision for sales returns	[1]	302,320	303,694	321,421
Actual sales returns	[1]	(306,536)	(306,749)	(317,090)
Balance at end of year	[1]	$ 11,842	$ 16,058	$ 19,113
[1] Amounts are shown net of cost of goods sold.

X

- 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

X

- 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

X

- 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

X

- Definition

Summary Of Significant Accounting Policies [Line Items]

+ References

No definition available.

+ Details

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