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v3.23.1

Commitments and Contingencies - Additional Information (Detail) - Non-cancellable Agreements With Vendors - Advertising Media and Other Commitments $ in Millions | 3 Months Ended
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Mar. 31, 2023 USD ($)
Other Commitments [Line Items] |
Minimum non-cancellable commitment | $ 6.8
Non-cancellable commitment pay period | 2 years
Contractual obligation | $ 60.1
Contractual obligation pay period | 5 years
Contractual obligation remainder to be paid | $ 44.7

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- Definition Contractual Obligation Pay Period + References No definition available. + Details
Name: | lz_ContractualObligationPayPeriod
Namespace Prefix: | lz_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Contractual Obligation, to be Paid, Remaining Amount + References No definition available. + Details
Name: | lz_ContractualObligationToBePaidRemainingAmount
Namespace Prefix: | lz_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Minimum non-cancellable commitment. + References No definition available. + Details
Name: | lz_MinimumNonCancellableCommitment
Namespace Prefix: | lz_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Non Cancellable Commitment Pay Period + References No definition available. + Details
Name: | lz_NonCancellableCommitmentPayPeriod
Namespace Prefix: | lz_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of contractual obligation, including but not limited to, long-term debt, capital lease obligations, operating lease obligations, purchase obligations, and other commitments. + References No definition available. + Details
Name: | us-gaap_ContractualObligation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- 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

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- Details
Name: | lz_AgreementsAxis=lz_NonCancellableAgreementsWithVendorsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_OtherCommitmentsAxis=lz_AdvertisingMediaAndOtherCommitmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |