Revenues - Additional Information (Details) - USD ($)	12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2022
Revenue from Contract with Customer [Abstract]
Contract assets	$ 0		$ 1,100,000
Deferred revenue	465,600,000		534,200,000
Deferred revenue, revenue recognized out of beginning balance	$ 443,900,000	$ 407,500,000
Remaining performance obligation, revenue expected to be recognized			$ 1,100,000,000
Revenue remaining performance obligation, percentage			61.00%