Stockholders' Equity - Schedule of Changes in Stockholders' Deficit by Component, Net of Tax (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 849	$ 965
Common shares issued under stock plans	(10)	9
Stock-based compensation expense	146	114
Shares issued related to business combination	10	3
Net income (loss)	146	156
Other comprehensive income (loss)	(24)	24
Repurchase and retirement of common shares	(436)	(143)
Ending balance	$ 681	$ 1,128
Common Stock Repurchase Program
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock repurchased and retired (in shares)	2,058,000	515,000
Repurchased shares of its common stock on the open market, average repurchase price per share (in usd per share)	$ 211.71	$ 276.96
Common stock shares remained available for repurchase under repurchase plans (in shares)	6,000,000	12,000,000
Common stock and additional paid-in capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)	218,000,000	220,000,000
Beginning balance	$ 2,923	$ 2,579
Common shares issued under stock plans (in shares)	1,000,000	1,000,000
Common shares issued under stock plans	$ (10)	$ 9
Stock-based compensation expense	146	114
Shares issued related to business combination	$ 10	$ 3
Repurchase and retirement of common shares (in shares)	(2,000,000)	(1,000,000)
Repurchase and retirement of common shares	$ (97)	$ (66)
Ending balance (in shares)	217,000,000	220,000,000
Ending balance	$ 2,972	$ 2,639
Accumulated other comprehensive loss
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(124)	(126)
Other comprehensive income (loss)	(24)	24
Ending balance	(148)	(102)
Accumulated deficit
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(1,950)	(1,488)
Net income (loss)	146	156
Repurchase and retirement of common shares	(339)	(77)
Ending balance	$ (2,143)	$ (1,409)