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Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 30, 2025	Jan. 31, 2025
Minimum
Commitments And Contingencies [Line Items]
Purchase obligation term	2 years
Maximum
Commitments And Contingencies [Line Items]
Purchase obligation term	8 years
June 2023 Facility | Wells Fargo Bank | Secured Debt | Letters of Credit
Commitments And Contingencies [Line Items]
Letters of credit facility	$ 11.2	$ 11.2

X

- Definition

Commitments and contingencies.

+ References

No definition available.

+ Details

Name:	box_CommitmentsAndContingenciesLineItems
Namespace Prefix:	box_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Purchase obligation term.

+ References

No definition available.

+ Details

Name:	box_PurchaseObligationTerm
Namespace Prefix:	box_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

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

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_LetterOfCreditMember
Namespace Prefix:
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Balance Type:
Period Type: