Common shares, treasury shares, and dividends - Narrative (Details) - USD ($)	12 Months Ended			84 Months Ended
	Feb. 01, 2025	Feb. 03, 2024	Jan. 28, 2023	Feb. 01, 2025
Class of Stock [Line Items]
Common shares, par value (usd per share)	$ 0.18	$ 0.18		$ 0.18
Stock Issued During Period, Shares, New Issues	0	0	0
Amount repurchased	$ 138,000,000.0	$ 139,300,000	$ 376,100,000
Restricted Stock, Shares Issued Net of Shares for Tax Withholdings	1,000,000.0	700,000	5,000,000.0
Treasury shares retired (in shares)	0	0	0
Preferred Stock, Amount of Preferred Dividends in Arrears	$ 0	$ 0	$ 0
2017 Program
Class of Stock [Line Items]
Increase to authorized amount	200,000,000	263,000,000	500,000,000	$ 200,000,000
Stock repurchase program, authorized amount	2,100,000,000			2,100,000,000
Amount repurchased	138,000,000.0	139,300,000	426,100,000	1,400,000,000
Remaining authorized repurchase amount	723,000,000			$ 723,000,000
Series A Redeemable Convertible Preferred Stock
Class of Stock [Line Items]
Dividends on redeemable convertible preferred shares	$ 1,300,000	$ 1,700,000	$ 1,700,000