Business and Summary of Significant Accounting Policies - Schedule of Changes In the Carrying Amount of Goodwill (Details) - USD ($)	12 Months Ended
	Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2023
Accounting Policies [Abstract]
Impairment of goodwill	$ 0	$ 0	$ 0
Goodwill [Roll Forward]
Goodwill, beginning of the year	3,653,000,000	3,625,000,000
Additions arising from acquisitions during the year	619,000,000	25,000,000
Effect of foreign currency translation and measurement period adjustments	(30,000,000)	3,000,000
Goodwill, end of the year	4,242,000,000	3,653,000,000	$ 3,625,000,000
Accumulated impairment loss	$ (149,000,000)	$ (149,000,000)