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Commitments and Contingencies - Additional Information (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2023 USD ($)
Commitments and Contingencies [Line Items]
Increase in future lease commitments	$ 76.2
Lessee operating lease commitments not yet commenced	$ 1.3

X

- Definition

Commitments and contingencies.

+ References

No definition available.

+ Details

Name:	hubs_CommitmentsAndContingenciesLineItems
Namespace Prefix:	hubs_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount future lease payments would increase by if early termination clauses were not followed.

+ References

No definition available.

+ Details

Name:	hubs_IncreaseInFutureLeaseCommitments
Namespace Prefix:	hubs_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Lessee operating lease commitments not yet commenced.

+ References

No definition available.

+ Details

Name:	hubs_LesseeOperatingLeaseCommitmentsNotYetCommenced
Namespace Prefix:	hubs_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration