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Shareholders' equity - Schedule of Class of Treasury Stock (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended						9 Months Ended		81 Months Ended
	Nov. 02, 2024	Aug. 03, 2024	May 04, 2024	Oct. 28, 2023	Jul. 29, 2023	Apr. 29, 2023	Nov. 02, 2024	Oct. 28, 2023	Nov. 02, 2024
Class of Stock [Line Items]
Amount repurchased	$ 66.6	$ 39.8	$ 7.4	$ 35.1	$ 43.3	$ 39.1
2017 Program
Class of Stock [Line Items]
Shares repurchased (in shares)							1.3	1.7
Amount repurchased							$ 113.8	$ 117.5	$ 1,400.0
Average repurchase price per share (usd per share)							$ 90.50	$ 70.76

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