Number of defendants named in a legal action.

No definition available.

Name:	us-gaap_LossContingencyNumberOfDefendants
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_OtherCommitmentsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of cash paid for the settlement of litigation or for other legal issues during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 25
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3536-108585

+ Details

Name:	us-gaap_PaymentsForLegalSettlements
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amount of cash paid for royalties during the current period.

+ References

+ Details

Name:	us-gaap_PaymentsForRoyalties
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier.

+ References

No definition available.

+ Details

Name:	us-gaap_PurchaseObligation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Lessee, Operating Lease, Lease Not Yet Commenced, Future Lease Payments

+ References

No definition available.

+ Details

Name:	zm_LesseeOperatingLeaseLeaseNotYetCommencedFutureLeasePayments
Namespace Prefix:	zm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_LossContingenciesByNatureOfContingencyAxis=zm_ViolationOfSecuritiesActSection10b20aAndRule10b5Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Commitments and Contingencies (Details) $ in Millions				1 Months Ended	6 Months Ended
Commitments and Contingencies (Details) $ in Millions	Jul. 30, 2020 officer	Jun. 11, 2020 officer	Apr. 08, 2020 officer	May 31, 2020 USD ($)	Jul. 31, 2020 USD ($)
Other Commitments [Line Items]
Purchase obligation					$ 25.8
Lessee, operating lease, lease not yet commenced, future lease payments					8.9
Payments for royalties				$ 9.8	2.9
Payments for legal settlements					$ 9.8
Violation Of Securities Act Section 10(b), 20(a), and Rule 10b-5
Other Commitments [Line Items]
Loss contingency, number of defendants \| officer	8	9	2