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Goodwill and intangibles - Additional Information (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
May 04, 2019 | Feb. 02, 2019 | May 05, 2018 | Feb. 02, 2019
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Goodwill and intangible impairments | $ 0.0 |  | $ 448.7 |
Impairment |  |  | 286.7 | $ 521.2
North America |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Goodwill and intangible impairments |  |  | 448.7 |
Impairment |  | $ 208.8 | 308.8 | $ 517.6
Impairment of intangible assets (excluding goodwill) |  | 74.3 | $ 139.9 |
Other |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Impairment |  | $ 3.6 |  |

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- Definition Total loss recognized during the period from the impairment of goodwill plus the loss recognized in the period resulting from the impairment of the carrying amount of intangible assets, other than goodwill. + References No definition available. + Details
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