Business and Summary of Significant Accounting Policies - Changes In the Carrying Amount of Goodwill (Details) - USD ($)	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2021
Accounting Policies [Abstract]
Impairment of goodwill	$ 0	$ 0	$ 0
Goodwill [Roll Forward]
Goodwill, beginning of period, gross		3,753,000,000	2,856,000,000
Less: accumulated impairment losses, beginning of the year		(149,000,000)	$ (149,000,000)
Additions arising from acquisitions during the year	85,000,000	936,000,000
Effect of foreign currency translation, measurement period adjustments, and other	(64,000,000)	(39,000,000)
Goodwill, end of the year	$ 3,625,000,000	$ 3,604,000,000