Balance Sheet Components - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020
Property Plant And Equipment [Line Items]
Allowance for doubtful accounts receivable	$ 2.3	$ 2.7
Accumulated depreciation of property and equipment acquired under finance lease	196.6	152.5
Depreciation expense	63.9	68.1	$ 58.2
Servers and related equipment
Property Plant And Equipment [Line Items]
Depreciation expense	51.9	54.6	$ 43.4
Servers and Related Equipment and Construction in Progress
Property Plant And Equipment [Line Items]
Gross amount of property and equipment acquired under finance lease	$ 258.8	$ 263.1