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Shareholders' equity - Narrative (Details) - USD ($)	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	Mar. 30, 2024	Feb. 03, 2024
Class of Stock [Line Items]
Amount of preferred dividends in arrears	$ 0			$ 0			$ 0	$ 0
Amount repurchased	66,600,000	$ 39,800,000	$ 7,400,000	$ 35,100,000	$ 43,300,000	$ 39,100,000
2017 Program
Class of Stock [Line Items]
Stock repurchase program, authorized amount											$ 1,900,000,000
Remaining authorized repurchase amount	$ 747,300,000						747,300,000		$ 747,300,000		$ 661,000,000
Stock Repurchase Program, Increase to Authorized Amount										$ 200,000,000
Amount repurchased							$ 113,800,000	$ 117,500,000	$ 1,400,000,000

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