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Accrued expenses and other current liabilities - Components of Warranty Reserve (Details) - USD ($) $ in Millions | Feb. 02, 2019 | Feb. 03, 2018 | Jan. 28, 2017 | Jan. 30, 2016
--- | --- | --- | --- | ---
Warranty Reserve [Line Items] |  |  |  |
Warranty reserve | $ 23.2 | $ 25.7 |  |
Included within accrued expenses above | 33.2 | 37.2 | $ 40.0 | $ 41.9
Warranty reserves |  |  |  |
Warranty Reserve [Line Items] |  |  |  |
Current liabilities | 10.0 | 11.5 |  |
Warranty reserve | 23.2 | 25.7 |  |
Included within accrued expenses above | $ 33.2 | $ 37.2 |  |

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