Shareholders' equity - Schedule of Class of Treasury Stock (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		87 Months Ended
	May 03, 2025	May 04, 2024	May 03, 2025
Class of Stock [Line Items]
Amount repurchased	$ 117.4	$ 7.4
2017 Program
Class of Stock [Line Items]
Shares repurchased (in shares)	2.1	0.1
Amount repurchased	$ 117.4	$ 7.4	$ 1,500.0
Average repurchase price per share (usd per share)	$ 57.00	$ 101.10