Common stock transactions (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands			3 Months Ended				12 Months Ended
	Mar. 16, 2022	Dec. 21, 2021	Jan. 28, 2022	Oct. 29, 2021	Jul. 30, 2021	Apr. 30, 2021	Jan. 28, 2022	Jan. 29, 2021	Jan. 31, 2020
Common stock transactions
Aggregate purchase price							$ 2,549,669	$ 2,466,434	$ 1,200,376
Cash dividend paid (in dollars per share)			$ 0.42	$ 0.42	$ 0.42	$ 0.42	$ 1.68	$ 1.44	$ 1.28
Subsequent event
Common stock transactions
Cash dividend declared (in dollars per share)	$ 0.55
Common Stock
Common stock transactions
Shares acquired under share repurchase program							12,058	12,297	8,252
Aggregate purchase price							$ 10,551	$ 10,760	$ 7,221
Common Stock | Pursuant to Authorized Repurchase Program
Common stock transactions
Common stock repurchase program, increase in the authorized amount		$ 2,000,000
Common stock repurchase authorization		$ 14,000,000
Shares acquired under share repurchase program							12,100	12,300	8,300
Aggregate purchase price							$ 2,500,000	$ 2,500,000	$ 1,200,000