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v3.25.4

Organization and Description of the Company (Details) | 12 Months Ended
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Dec. 31, 2025
LPL Financial [Member] |
Consolidation, Parent Ownership Interest [Line Items] |
Ownership interest percentage in subsidiary | 100.00%
Number of states in which entity operates | 50
AW Subsidiary Inc. [Member] |
Consolidation, Parent Ownership Interest [Line Items] |
Ownership interest percentage in subsidiary | 100.00%
LPL Employee Services, LLC [Member] |
Consolidation, Parent Ownership Interest [Line Items] |
Ownership interest percentage in subsidiary | 100.00%
Fortigent [Member] |
Consolidation, Parent Ownership Interest [Line Items] |
Ownership interest percentage in subsidiary | 100.00%
LPLIA [Member] |
Consolidation, Parent Ownership Interest [Line Items] |
Ownership interest percentage in subsidiary | 100.00%
Captive Insurance Subsidiary [Member] |
Consolidation, Parent Ownership Interest [Line Items] |
Ownership interest percentage in subsidiary | 100.00%

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- Definition Ownership interest percentage in subsidiary. + References No definition available. + Details
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Namespace Prefix: | lpla_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

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

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- Definition The number of states the entity operates in as of the balance sheet date. + References No definition available. + Details
Name: | us-gaap_NumberOfStatesInWhichEntityOperates
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | dei_LegalEntityAxis=lpla_LPLFinancialLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | dei_LegalEntityAxis=lpla_AWSubsidiaryIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | dei_LegalEntityAxis=lpla_LPLEmployeeServicesLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | dei_LegalEntityAxis=lpla_FortigentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | dei_LegalEntityAxis=lpla_LplInsuranceAssociateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | dei_LegalEntityAxis=lpla_CaptiveInsuranceSubsidiaryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |