XML 111 R30.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Business Description and Organization - Limited Partnership Interests in AB Holdings (Details) - AllianceBernstein Corporation | 12 Months Ended
--- | ---
Dec. 31, 2024
EQH and its subsidiaries |
Ownership structure of AB Holding |
Limited partners or members ownership interest in Company (percent) | 61.90%
AB Holding |
Ownership structure of AB Holding |
Limited partners or members ownership interest in Company (percent) | 37.50%
Unaffiliated holders |
Ownership structure of AB Holding |
Limited partners or members ownership interest in Company (percent) | 0.60%
AB |
Ownership structure of AB Holding |
Limited partners or members ownership interest in Company (percent) | 100.00%

X
- Definition Percentage investment held by members or limited partners of limited liability company (LLC) or limited partnership (LP). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482987/272-10-50-3 + Details
Name: | us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_LimitedLiabilityCompanyOrLimitedPartnershipBusinessOrganizationAndOperationsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_OwnershipAxis=ab_EQHAndItsSubsidiariesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | srt_OwnershipAxis=ab_ABHoldingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_OwnershipAxis=ab_UnaffiliatedHoldersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_OwnershipAxis=ab_AllianceBernsteinL.P.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |