Cover Page - USD ($)

12 Months Ended

Dec. 31, 2025

Jun. 30, 2025

Cover [Abstract]

Document Type

10-K

Document Annual Report

true

Document Period End Date

Dec. 31, 2025

Current Fiscal Year End Date

--12-31

Document Transition Report

false

Entity File Number

000-29961

Entity Registrant Name

ALLIANCEBERNSTEIN L.P.

Entity Incorporation, State or Country Code

DE

Entity Tax Identification Number

13-4064930

Entity Address, Address Line One

501 Commerce Street

Entity Address, City or Town

Nashville

Entity Address, State or Province

TN

Entity Address, Postal Zip Code

37203

City Area Code

615

Local Phone Number

622-0000

Title of 12(g) Security

Units of Limited Partnership Interest

Entity Well-known Seasoned Issuer

Yes

Entity Voluntary Filers

No

Entity Current Reporting Status

Yes

Entity Interactive Data Current

Yes

Entity Filer Category

Non-accelerated Filer

Entity Small Business

false

Entity Emerging Growth Company

false

ICFR Auditor Attestation Flag

true

Entity Shell Company

false

Document Financial Statement Error Correction

false

Entity Common Stock, Shares Outstanding

293,508,421

Documents Incorporated by Reference

DOCUMENTS INCORPORATED BY REFERENCE

This Form 10-K does not incorporate any document by reference.

Entity Central Index Key

0001109448

Document Fiscal Year Focus

2025

Document Fiscal Period Focus

FY

Amendment Flag

false

Entity Public Float

$ 0