Operating Leases - Schedule of Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands	Jan. 31, 2021	Jan. 31, 2020
Assets
Operating lease right-of-use assets	$ 97,649	$ 68,608
Liabilities:
Accrued expenses and other current liabilities	15,601	7,675
Operating lease liabilities, noncurrent	90,415	64,792
Total operating lease liabilities	$ 106,016	$ 72,467
Weighted average remaining lease term	6 years 1 month 6 days	7 years 6 months
Weighted average discount rate	4.50%	5.10%
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	zm:AccruedLiabilitiesAndOtherLiabilitiesCurrent	zm:AccruedLiabilitiesAndOtherLiabilitiesCurrent