Cover Page

Cover PageJul. 12, 2021
Cover [Abstract]
Document Type8-K
Document Period End DateJul. 12,
Entity Registrant NameALLIANCEBERNSTEIN L.P.
Entity Incorporation, State or Country CodeDE
Entity File Number000-29961
Entity Tax Identification Number13-4064930
Entity Address, Address Line One1345 Avenue of the Americas
Entity Address, City or TownNew York
Entity Address, State or ProvinceNY
Entity Address, Postal Zip Code10105
City Area Code212
Local Phone Number969-1000
Written Communicationsfalse
Soliciting Materialfalse
Pre-commencement Tender Offerfalse
Pre-commencement Issuer Tender Offerfalse
Entity Emerging Growth Companyfalse
Entity Central Index Key0001109448
Amendment Flagfalse