Stockholders' Equity - Schedule of Changes in Stockholders' Deficit by Component, Net of Tax (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended				6 Months Ended
	Jul. 31, 2022	Apr. 30, 2022	Jul. 31, 2021	Apr. 30, 2021	Jul. 31, 2022	Jul. 31, 2021
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 681	$ 849	$ 1,128	$ 965	$ 849	$ 965
Common shares issued under stock plans	(17)	(10)	(6)	9
Stock-based compensation expense	163	146	148	114
Shares issued related to business combination		10		3
Settlement of liability-classified restricted common shares	5				5	0
Net income	186	146	115	156	332	271
Other comprehensive income (loss)	(21)	(24)	(11)	24
Repurchase and retirement of common shares	(257)	(436)	(46)	(143)
Ending balance	$ 740	$ 681	$ 1,328	$ 1,128	$ 740	$ 1,328
Common Stock Repurchase Program
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock repurchased and retired (in shares)	1,417		164		3,475	679
Repurchased shares of its common stock on the open market, average repurchase price per share (in usd per share)	$ 181.64		$ 282.67		$ 199.45	$ 278.34
Common stock shares remained available for repurchase under repurchase plans (in shares)	5,000		11,000		5,000	11,000
Common stock and additional paid-in capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)	217,000	218,000	220,000	220,000	218,000	220,000
Beginning balance	$ 2,972	$ 2,923	$ 2,639	$ 2,579	$ 2,923	$ 2,579
Common shares issued under stock plans (in shares)		1,000		1,000
Common shares issued under stock plans	(17)	$ (10)	(6)	$ 9
Stock-based compensation expense	$ 163	146	$ 148	114
Shares issued related to business combination		$ 10		$ 3
Settlement of liability-classified restricted common shares					$ 5	$ 0
Repurchase and retirement of common shares (in shares)	(1,000)	(2,000)		(1,000)
Repurchase and retirement of common shares	$ (34)	$ (97)	$ (1)	$ (66)
Ending balance (in shares)	216,000	217,000	220,000	220,000	216,000	220,000
Ending balance	$ 3,089	$ 2,972	$ 2,780	$ 2,639	$ 3,089	$ 2,780
Accumulated other comprehensive loss
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(148)	(124)	(102)	(126)	(124)	(126)
Other comprehensive income (loss)	(21)	(24)	(11)	24
Ending balance	(169)	(148)	(113)	(102)	(169)	(113)
Accumulated deficit
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(2,143)	(1,950)	(1,409)	(1,488)	(1,950)	(1,488)
Net income	186	146	115	156
Repurchase and retirement of common shares	(223)	(339)	(45)	(77)
Ending balance	$ (2,180)	$ (2,143)	$ (1,339)	$ (1,409)	$ (2,180)	$ (1,339)