Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition (Details)

v3.21.2
Revenue Recognition (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jul. 31, 2021
Jul. 31, 2020
Jul. 31, 2021
Jul. 31, 2020
Jan. 31, 2021
Capitalized Contract Cost [Line Items]          
Capitalized costs to obtain customer contracts $ 51.9 $ 37.3 $ 51.9 $ 37.3  
Amortization of costs to obtain customer contracts 7.1 5.0 13.7 9.8  
Revenue recognized previously included in deferred revenue balance 96.9 78.7 153.5 124.6  
Contract assets 1.6   1.6   $ 0.8
Prepaid expenses and other current assets          
Capitalized Contract Cost [Line Items]          
Capitalized costs to obtain customer contracts 26.6 20.0 26.6 20.0  
Other noncurrent assets          
Capitalized Contract Cost [Line Items]          
Capitalized costs to obtain customer contracts $ 25.3 $ 17.3 $ 25.3 $ 17.3