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Segment Information - Revenue by Country (Details) - Net sales revenue | 12 Months Ended
--- | ---
Jan. 28, 2018 | Jan. 29, 2017 | Jan. 31, 2016
Geographic Information And Concentration Of Risk [Line Items] |  |  |
Concentration risk, percentage | 100.00% | 100.00% | 100.00%
Geographic Concentration Risk [Member] |  |  |
Geographic Information And Concentration Of Risk [Line Items] |  |  |
Concentration risk, percentage | 60.00% | 57.00% | 59.00%
China Including Hong Kong [Member] | Geographic Concentration Risk [Member] |  |  |
Geographic Information And Concentration Of Risk [Line Items] |  |  |
Concentration risk, percentage | 51.00% | 48.00% | 47.00%
United States | Geographic Concentration Risk [Member] |  |  |
Geographic Information And Concentration Of Risk [Line Items] |  |  |
Concentration risk, percentage | 9.00% | 9.00% | 12.00%

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