Condensed Consolidated Statements of Stockholders’ Equity - USD ($) shares in Millions, $ in Millions	Total	Common Stock	Treasury Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income/(Loss)	Retained Earnings
Beginning balance (in shares) at Jan. 31, 2024		1,035
Beginning balance at Jan. 31, 2024	$ 59,646	$ 1	$ (11,692)	$ 59,841	$ (225)	$ 11,721
Beginning balance (in shares) at Jan. 31, 2024			(64)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued (in shares)		7
Common stock issued	352			352
Common stock repurchased (in shares)			(7)
Common stock repurchased	(2,168)		$ (2,168)
Stock-based compensation	753			753
Other comprehensive gain, net of tax	(45)				(45)
Cash dividends and dividend equivalents declared	(388)					(388)
Net income	1,533					1,533
Ending balance (in shares) at Apr. 30, 2024		1,042
Ending balance at Apr. 30, 2024	59,683	$ 1	$ (13,860)	60,946	(270)	12,866
Ending balance (in shares) at Apr. 30, 2024			(71)
Beginning balance (in shares) at Jan. 31, 2025		1,056
Beginning balance at Jan. 31, 2025	61,173	$ 1	$ (19,507)	64,576	(266)	16,369
Beginning balance (in shares) at Jan. 31, 2025			(94)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued (in shares)		6
Common stock issued	97			97
Common stock repurchased (in shares)			(10)
Common stock repurchased	(2,692)		$ (2,692)
Stock-based compensation	817			817
Other comprehensive gain, net of tax	136				136
Cash dividends and dividend equivalents declared	(406)					(406)
Net income	1,541					1,541
Ending balance (in shares) at Apr. 30, 2025		1,062
Ending balance at Apr. 30, 2025	$ 60,666	$ 1	$ (22,199)	$ 65,490	$ (130)	$ 17,504
Ending balance (in shares) at Apr. 30, 2025			(104)