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Goodwill and intangibles - Summary of Goodwill (Details) - USD ($) $ in Millions	3 Months Ended			12 Months Ended
	May 02, 2020	Aug. 03, 2019	May 04, 2019	Feb. 01, 2020
Goodwill [Roll Forward]
Impairment	$ (10.7)	$ (47.7)	$ 0.0
North America
Goodwill [Roll Forward]
Beginning Balance	248.8		$ 296.6	$ 296.6
Impairment	(10.7)			(47.7)
Impact of foreign exchange and other adjustments	(0.1)			(0.1)
Ending Balance	$ 238.0			$ 248.8

X

- Definition

Amount before accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of increase (decrease) from foreign currency translation adjustments and purchase accounting adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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