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 income (loss), 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, 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]
Other comprehensive income (loss), net of tax	0
Net income	4,489
Ending balance (in shares) at Oct. 31, 2024		1,050
Ending balance at Oct. 31, 2024	58,525	$ 1	$ (19,414)	63,114	(225)	15,049
Ending balance (in shares) at Oct. 31, 2024			(94)
Beginning balance (in shares) at Apr. 30, 2024		1,042
Beginning balance at Apr. 30, 2024	59,683	$ 1	$ (13,860)	60,946	(270)	12,866
Beginning balance (in shares) at Apr. 30, 2024			(71)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued (in shares)		5
Common stock issued	384			384
Common stock repurchased (in shares)			(18)
Common stock repurchased	(4,322)		$ (4,322)
Stock-based compensation	813			813
Other comprehensive income (loss), net of tax	34				34
Cash dividends and dividend equivalents declared	(388)					(388)
Net income	1,429					1,429
Ending balance (in shares) at Jul. 31, 2024		1,047
Ending balance at Jul. 31, 2024	57,633	$ 1	$ (18,182)	62,143	(236)	13,907
Ending balance (in shares) at Jul. 31, 2024			(89)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued (in shares)		3
Common stock issued	148			148
Common stock repurchased (in shares)			(5)
Common stock repurchased	(1,232)		$ (1,232)
Stock-based compensation	823			823
Other comprehensive income (loss), net of tax	11				11
Cash dividends and dividend equivalents declared	(385)					(385)
Net income	1,527					1,527
Ending balance (in shares) at Oct. 31, 2024		1,050
Ending balance at Oct. 31, 2024	58,525	$ 1	$ (19,414)	63,114	(225)	15,049
Ending balance (in shares) at Oct. 31, 2024			(94)
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 income (loss), 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)
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]
Other comprehensive income (loss), net of tax	420
Net income	5,514
Ending balance (in shares) at Oct. 31, 2025		1,069
Ending balance at Oct. 31, 2025	60,021	$ 1	$ (28,255)	67,448	154	20,673
Ending balance (in shares) at Oct. 31, 2025			(127)
Beginning balance (in shares) at Apr. 30, 2025		1,062
Beginning balance at Apr. 30, 2025	60,666	$ 1	$ (22,199)	65,490	(130)	17,504
Beginning balance (in shares) at Apr. 30, 2025			(104)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued (in shares)		5
Common stock issued	427			427
Common stock withheld related to net share settlement of equity awards	(12)			(12)
Common stock repurchased (in shares)			(8)
Common stock repurchased	(2,209)		$ (2,209)
Stock-based compensation	796			796
Other comprehensive income (loss), net of tax	177				177
Cash dividends and dividend equivalents declared	(404)					(404)
Net income	1,887					1,887
Ending balance (in shares) at Jul. 31, 2025		1,067
Ending balance at Jul. 31, 2025	61,328	$ 1	$ (24,408)	66,701	47	18,987
Ending balance (in shares) at Jul. 31, 2025			(112)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued (in shares)		2
Common stock issued	52			52
Common stock withheld related to net share settlement of equity awards	(127)			(127)
Common stock repurchased (in shares)			(15)
Common stock repurchased	(3,847)		$ (3,847)
Stock-based compensation	822			822
Other comprehensive income (loss), net of tax	107				107
Cash dividends and dividend equivalents declared	(400)					(400)
Net income	2,086					2,086
Ending balance (in shares) at Oct. 31, 2025		1,069
Ending balance at Oct. 31, 2025	$ 60,021	$ 1	$ (28,255)	$ 67,448	$ 154	$ 20,673
Ending balance (in shares) at Oct. 31, 2025			(127)