Goodwill and Intangible Assets, net - Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2022	Jul. 31, 2021	Jan. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 5,400,275,000		$ 5,400,275,000		$ 5,401,343,000
Goodwill impairments	0	$ 0	0	$ 0
Intangible amortization expense	$ 23,200,000	$ 21,300,000	$ 45,900,000	$ 24,200,000