Stock Repurchase Program (Details) - USD ($) $ / shares in Units, shares in Millions	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2021	Nov. 30, 2022
Equity [Abstract]
Repurchase and retirement of common shares (in shares)	5	4	2
Average repurchase price per share (in dollars per share)	$ 198.51	$ 275.50	$ 207.61
Stock repurchase authorized amount				$ 5,000,000,000
Shares remained available for repurchase (in shares)	3
Amount remained available for repurchase		$ 5,000,000,000