Percentage points added to the reference rate to compute the variable rate on the debt instrument.

No definition available.

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

+ Details

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

- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 6
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6036836-161870

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateEffectivePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

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

- Details

Name:	us-gaap_DebtInstrumentAxis=vrnt_A2017RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=vrnt_A2017TermLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	vrnt_DebtInstrumentVariableRateBaseAxis=vrnt_VariableRateBasedonEurodollarRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=vrnt_A2017CreditAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=vrnt_EurodollarLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=vrnt_A2017TermLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=vrnt_A2017TermLoanFollowingJanuary2018AmendmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	vrnt_DebtInstrumentVariableRateBaseAxis=vrnt_VariableRateBasedonABRRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=vrnt_ABRRateLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

LONG-TERM DEBT - 2017 CREDIT AGREEMENT - INTEREST RATE DETAILS (Details)	12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020
Borrowings under 2017 Revolving Credit Facility
Debt Instrument [Line Items]
Coupon interest rate		3.41%
June 2017 Term Loan
Debt Instrument [Line Items]
Coupon interest rate	2.14%	3.85%
Effective interest rate (as a percent)	2.34%
Variable Rate Based on Eurodollar Rate \| 2017 Credit Agreement \| Eurodollar loans
Debt Instrument [Line Items]
Variable rate basis	Eurodollar Rate
Variable Rate Based on Eurodollar Rate \| June 2017 Term Loan \| Eurodollar loans
Debt Instrument [Line Items]
Interest rate margin (as a percent)	2.25%
Variable Rate Based on Eurodollar Rate \| 2017 Term Loan - Following January 2018 Amendment \| Eurodollar loans
Debt Instrument [Line Items]
Interest rate margin (as a percent)	2.00%
Variable Rate Based on ABR Rate \| 2017 Credit Agreement \| ABR Rate Loans
Debt Instrument [Line Items]
Variable rate basis	ABR rate
Variable Rate Based on ABR Rate \| June 2017 Term Loan \| ABR Rate Loans
Debt Instrument [Line Items]
Interest rate margin (as a percent)	1.25%
Variable Rate Based on ABR Rate \| 2017 Term Loan - Following January 2018 Amendment \| ABR Rate Loans
Debt Instrument [Line Items]
Interest rate margin (as a percent)	1.00%