Alliancebernstein 10-Q 26 Jul 24 2024 Q2 Quarterly report Financial data

Cover Page

Cover Page	6 Months Ended
	Jun. 30, 2024 shares
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2024
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
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
Entity Shell Company	false
Entity Common Stock, Shares Outstanding	286,773,773
Entity Central Index Key	0001109448
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q2
Amendment Flag	false

Condensed Consolidated Statemen

Condensed Consolidated Statements of Financial Condition - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
ASSETS
Cash and cash equivalents	$ 871,369	$ 1,000,103
Cash and securities segregated, at fair value (cost: $583,151 and $859,448)	591,582	867,680
Receivables, net:
Brokers and dealers	43,606	53,144
Brokerage clients	1,394,269	1,314,656
Other fees	124,925	125,500
Investments:
Joint ventures	295,379	0
Other	229,393	243,554
Assets of consolidated company-sponsored investment funds:
Furniture, equipment and leasehold improvements, net	208,399	176,348
Goodwill	3,598,591	3,598,591
Intangible assets, net	240,601	264,555
Deferred sales commissions, net	124,779	87,374
Right-of-use assets	490,410	323,766
Assets held for sale	0	564,776
Other assets	321,184	216,213
Total assets	9,100,970	9,609,806
Payables:
Brokers and dealers	156,894	259,175
Brokerage clients	2,060,393	2,200,835
Contingent consideration liability	255,166	252,690
Accounts payable and accrued expenses	286,536	172,163
Lease liabilities	555,992	369,017
Accrued compensation and benefits	571,247	372,305
Debt	620,000	1,154,316
Liabilities held for sale	0	153,342
Total liabilities	4,508,018	4,947,024
Commitments and contingencies (See Note 12)
Redeemable non-controlling interest of consolidated entities	108,255	209,420
Capital:
General Partner	45,880	45,388
Limited partners: 286,773,773 and 286,609,212 units issued and outstanding	4,639,147	4,590,619
Receivables from affiliates	(3,822)	(4,490)
AB Holding Units held for long-term incentive compensation plans	(92,612)	(76,363)
Accumulated other comprehensive (loss)	(107,436)	(106,364)
Partners’ capital attributable to AB Unitholders	4,481,157	4,448,790
Non-redeemable non-controlling interests in consolidated entities	3,540	4,572
Total capital	4,484,697	4,453,362
Total liabilities, non-controlling interest and capital	9,100,970	9,609,806
Company-Sponsored Investment Funds
Assets of consolidated company-sponsored investment funds:
Cash and cash equivalents	3,857	7,739
Investments	253,070	397,174
Other assets	3,676	25,299
Total assets	260,603	430,212
Payables:
Liabilities of consolidated company-sponsored investment funds	1,453	12,537
Total liabilities	1,453	12,537
Redeemable non-controlling interest of consolidated entities	108,255	209,420
Capital:
Total capital	150,895	208,255
Total liabilities, non-controlling interest and capital	260,603	430,212
AllianceBernstein L.P. (AB)
Receivables, net:
AB funds fees	305,880	343,334
Payables:
AB mutual funds	$ 337	$ 644

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Financial Condition (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Statement of Financial Position [Abstract]
Cash and securities segregated, at cost	$ 583,151	$ 859,448
Limited partners, units issued (in units)	286,773,773	286,609,212
Limited partners, units outstanding (in shares)	286,773,773	286,609,212

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Revenues:
Dividend and interest income	$ 43,986	$ 50,193	$ 88,501	$ 100,872
Investment (losses) gains	(23,629)	670	(11,886)	5,934
Other revenues	39,167	24,719	64,460	50,865
Total revenues	1,049,756	1,033,905	2,177,624	2,086,017
Less: Broker-dealer related interest expense	21,813	25,449	45,530	53,470
Net revenues	1,027,943	1,008,456	2,132,094	2,032,547
Expenses:
Employee compensation and benefits	423,324	428,079	876,096	862,242
Promotion and servicing:
Amortization of deferred sales commissions	13,348	8,767	25,147	16,921
Trade execution, marketing, T&E and other	40,940	54,138	95,931	104,768
General and administrative	145,732	149,935	283,642	289,588
Contingent payment arrangements	2,558	2,443	5,116	4,887
Interest on borrowings	11,313	14,672	28,683	28,385
Amortization of intangible assets	11,531	11,723	23,303	23,416
Total expenses	828,654	819,795	1,690,808	1,628,626
Operating income	199,289	188,661	441,286	403,921
Gain on divestiture	134,555	0	134,555	0
Non-operating income	134,555	0	134,555	0
Pre-tax income	333,844	188,661	575,841	403,921
Income taxes	20,092	9,901	36,134	21,243
Net income	313,752	178,760	539,707	382,678
Net income of consolidated entities attributable to non-controlling interests	4,180	3,023	12,208	12,790
Net income attributable to AB Unitholders	$ 309,572	$ 175,737	$ 527,499	$ 369,888
Net income per AB Unit:
Basic (in dollars per share)	$ 1.07	$ 0.61	$ 1.82	$ 1.28
Diluted (in dollars per share)	$ 1.07	$ 0.61	$ 1.82	$ 1.28
Investment advisory and services fees
Revenues:
Revenue subject to contracts with customers	$ 817,327	$ 721,678	$ 1,601,732	$ 1,450,585
Bernstein research services
Revenues:
Revenue subject to contracts with customers	0	91,847	96,222	191,885
Distribution revenues
Revenues:
Revenue subject to contracts with customers	172,905	144,798	338,595	285,876
Promotion and servicing:
Distribution-related payments	$ 179,908	$ 150,038	$ 352,890	$ 298,419

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 313,752	$ 178,760	$ 539,707	$ 382,678
Other comprehensive (loss) income:
Foreign currency translation adjustments, before reclassification and tax:	(1,579)	4,525	(11,888)	10,656
Less: reclassification adjustment for (losses) in net income upon liquidation	(10,197)	0	(10,197)	0
Foreign currency translation adjustments, before reclassification and tax:	8,618	4,525	(1,691)	10,656
Income tax (expense) benefit	(54)	16	55	63
Foreign currency translation adjustments, net of tax	8,564	4,541	(1,636)	10,719
Changes in employee benefit related items:
Amortization of prior service cost	6	6	12	12
Recognized actuarial (loss) gain	(110)	298	559	596
Changes in employee benefit related items	(104)	304	571	608
Income tax (expense)	(2)	(1)	(7)	(4)
Employee benefit related items, net of tax	(106)	303	564	604
Other comprehensive income (loss)	8,458	4,844	(1,072)	11,323
Less: Comprehensive income in consolidated entities attributable to non-controlling interests	4,180	3,023	12,208	12,790
Comprehensive income attributable to AB Unitholders	$ 318,030	$ 180,581	$ 526,427	$ 381,211

Condensed Consolidated Statem_5

Condensed Consolidated Statements of Changes in Partners' Capital - USD ($) $ in Thousands	Total	Receivables from Affiliates	AB Holding Units held for Long-term Incentive Compensation Plans	Accumulated Other Comprehensive (Loss)	Non-redeemable Non-controlling Interests in Consolidated Entities	General Partner’s Capital	Limited Partners' Capital
Partners' capital, beginning balance at Dec. 31, 2022		$ (4,270)	$ (95,318)	$ (129,477)		$ 45,985	$ 4,648,113
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 382,678				$ 515	3,699	366,189
Cash distributions						(4,357)	(430,856)
Long-term incentive compensation		406	14,961			3	327
(Retirement) Issuance of AB Units, net						(97)	(9,784)
Capital contributions from (to) AB Holding		(1,284)
Purchases of AB Holding Units to fund long-term compensation plans, net			(18,662)
Retirement (Issuance) of AB Units, net			10,756
Re-valuation of AB Holding Units held in rabbi trust			(1,080)
Foreign currency translation adjustment, net of tax	10,719			10,719
Changes in employee benefit related items, net of tax	604			604
Distributions to non-controlling interests, net					(2,473)
Adjustment					(264)
Contributions from non-controlling interest					0
Partners' capital, ending balance at Jun. 30, 2023	4,406,577	(5,148)	(89,343)	(118,154)		45,233	4,573,989
Balance, beginning of period at Dec. 31, 2022					12,607
Balance, end of period at Jun. 30, 2023					10,385
Partners' capital, beginning balance at Mar. 31, 2023		(5,097)	(96,077)	(122,998)		45,595	4,609,592
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	178,760				515	1,758	173,979
Cash distributions						(2,136)	(211,158)
Long-term incentive compensation		215	8,376			(12)	(1,111)
(Retirement) Issuance of AB Units, net						28	2,687
Capital contributions from (to) AB Holding		(266)
Purchases of AB Holding Units to fund long-term compensation plans, net			(572)
Retirement (Issuance) of AB Units, net			(1,754)
Re-valuation of AB Holding Units held in rabbi trust			684
Foreign currency translation adjustment, net of tax	4,541			4,541
Changes in employee benefit related items, net of tax	303			303
Distributions to non-controlling interests, net					(2,473)
Adjustment					0
Contributions from non-controlling interest					0
Partners' capital, ending balance at Jun. 30, 2023	4,406,577	(5,148)	(89,343)	(118,154)		45,233	4,573,989
Balance, beginning of period at Mar. 31, 2023					12,343
Balance, end of period at Jun. 30, 2023					10,385
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total capital	4,416,962
Total capital	4,453,362
Partners' capital, beginning balance at Dec. 31, 2023	4,448,790	(4,490)	(76,363)	(106,364)		45,388	4,590,619
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	539,707				1,568	5,275	522,224
Cash distributions						(4,816)	(476,293)
Long-term incentive compensation		506	20,379			56	5,497
(Retirement) Issuance of AB Units, net						(23)	(2,900)
Capital contributions from (to) AB Holding		162
Purchases of AB Holding Units to fund long-term compensation plans, net			(33,789)
Retirement (Issuance) of AB Units, net			3,627
Re-valuation of AB Holding Units held in rabbi trust			(6,466)
Foreign currency translation adjustment, net of tax	(1,636)			(1,636)
Changes in employee benefit related items, net of tax	564			564
Distributions to non-controlling interests, net					(2,695)
Adjustment					0
Contributions from non-controlling interest					95
Partners' capital, ending balance at Jun. 30, 2024	4,481,157	(3,822)	(92,612)	(107,436)		45,880	4,639,147
Balance, beginning of period at Dec. 31, 2023					4,572
Balance, end of period at Jun. 30, 2024					3,540
Partners' capital, beginning balance at Mar. 31, 2024		(4,686)	(95,859)	(115,894)		45,325	4,584,317
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	313,752				1,450	3,096	306,476
Cash distributions						(2,351)	(232,714)
Long-term incentive compensation		291	11,618			(11)	(1,177)
(Retirement) Issuance of AB Units, net						(179)	(17,755)
Capital contributions from (to) AB Holding		573
Purchases of AB Holding Units to fund long-term compensation plans, net			(28,237)
Retirement (Issuance) of AB Units, net			19,110
Re-valuation of AB Holding Units held in rabbi trust			756
Foreign currency translation adjustment, net of tax	8,564			8,564
Changes in employee benefit related items, net of tax	(106)			(106)
Distributions to non-controlling interests, net					(2,485)
Adjustment					0
Contributions from non-controlling interest					95
Partners' capital, ending balance at Jun. 30, 2024	4,481,157	$ (3,822)	$ (92,612)	$ (107,436)		$ 45,880	$ 4,639,147
Balance, beginning of period at Mar. 31, 2024					4,480
Balance, end of period at Jun. 30, 2024					$ 3,540
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total capital	$ 4,484,697

Condensed Consolidated Statem_6

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Cash flows from operating activities:
Net income	$ 539,707	$ 382,678
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization of deferred sales commissions	25,147	16,921
Non-cash long-term incentive compensation expense	20,885	15,367
Depreciation and other amortization	46,319	45,928
Non-cash lease expense	57,705	51,768
Other, net	15,017	4,699
Changes in assets and liabilities:
Decrease in securities, segregated	276,098	643,417
Decrease in receivables	33,358	336,744
(Increase) in deferred sales commissions	(62,552)	(29,916)
(Decrease) in payables	(269,927)	(1,027,887)
Increase (decrease) in accounts payable and accrued expenses	64,332	(15,595)
Increase in accrued compensation and benefits	212,993	185,443
Cash payments to relieve operating lease liabilities	(34,911)	(53,498)
Net cash provided by operating activities	945,908	722,321
Cash flows from investing activities:
Purchases of furniture, equipment and leasehold improvements	(56,565)	(14,941)
Divestiture of business (includes $304.0 million in cash proceeds)	(40,196)	0
Capital contribution to equity method investments	(39,401)	0
Proceeds from Equity Method Investment, Distribution, Return of Capital	86,200	0
Net cash contribution (to) affiliates	(752)	(2,030)
Net cash (used in) investing activities	(50,714)	(16,971)
Cash flows from financing activities:
(Repayment of) debt, net	(534,316)	(120,000)
(Decrease) in overdrafts payable	(2)	0
Distributions to General Partner and Unitholders	(481,109)	(435,213)
Purchases of AB Holding Units to fund long-term incentive compensation plan awards, net	(33,789)	(18,662)
Other, net	(5,603)	(2,426)
Net cash (used in) financing activities	(1,168,192)	(772,184)
Effect of exchange rate changes on cash and cash equivalents	(12,665)	16,178
Net (decrease) in cash and cash equivalents	(285,663)	(50,656)
Cash and cash equivalents as of beginning of the period	1,160,889	1,309,017
Cash and cash equivalents as of end of the period	875,226	1,258,361
Excluding Company-Sponsored Investment Funds
Adjustments to reconcile net income to net cash provided by operating activities:
Unrealized (gains) on investments	(5,944)	(1,853)
Equity in earnings of equity method investments	(27,893)	0
(Gain) on divestiture	(134,555)	0
Changes in assets and liabilities:
Decrease in investments	27,092	3,155
(Increase) in other assets	(47,392)	(18,581)
Company-Sponsored Investment Funds
Adjustments to reconcile net income to net cash provided by operating activities:
Unrealized (gains) on investments	(11,527)	(27,027)
Changes in assets and liabilities:
Decrease in investments	155,631	221,636
Increase (decrease) in other assets and liabilities of consolidated company-sponsored investment funds, net	10,539	(11,078)
Cash flows from financing activities:
(Redemptions) of non-controlling interest in consolidated company-sponsored investment funds, net	$ (113,373)	$ (195,883)

Condensed Consolidated Statem_7

Condensed Consolidated Statements of Cash Flows (Parenthetical) $ in Millions	6 Months Ended
	Jun. 30, 2024 USD ($)
Statement of Cash Flows [Abstract]
Proceeds from divestiture of business	$ 304

Business Description Organizati

Business Description Organization and Basis of Presentation	6 Months Ended
	Jun. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Business Description Organization and Basis of Presentation	Business Description Organization and Basis of Presentation Business Description (1) We provide diversified investment management and related services globally to a broad range of clients. Our principal services include: • Institutional Services – servicing our institutional clients, including private and public pension plans, foundations and endowments, insurance companies, central banks and governments worldwide, and affiliates such as Equitable Holdings, Inc. ("EQH") and its subsidiaries, by means of separately-managed accounts, sub-advisory relationships, structured products, collective investment trusts, mutual funds, hedge funds and other investment vehicles. • Retail Services – servicing our retail clients, primarily by means of retail mutual funds sponsored by AB or an affiliated company, sub-advisory relationships with mutual funds sponsored by third parties, separately-managed account programs sponsored by financial intermediaries worldwide and other investment vehicles. • Private Wealth Services – servicing our private clients, including high-net-worth individuals and families, trusts and estates, charitable foundations, partnerships, private and family corporations, and other entities, by means of separately-managed accounts, hedge funds, mutual funds and other investment vehicles. AB also provides distribution, shareholder servicing, transfer agency services and administrative services to the mutual funds we sponsor. AB's high-quality, in-depth research is the foundation of its asset management and private wealth management businesses. AB’s research disciplines include economic, fundamental equity, fixed income and quantitative research. In addition, AB has expertise in multi-asset strategies, wealth management, environmental, social and corporate governance ("ESG"), and alternative investments. AB provides a broad range of investment services with expertise in: • Actively managed equity strategies, across global and regional universes, as well as capitalization ranges, concentration ranges and investment strategies, including value, growth and core equities; • Actively managed traditional and unconstrained fixed income strategies, including taxable and tax-exempt strategies; • Actively managed alternative investments, including fundamental and systematically-driven hedge funds, fund of hedge funds and direct assets (e.g., direct lending, real estate and private equity); • Portfolios with Purpose, including Sustainable, Impact and Responsible+ (Climate-Conscious and ESG leaders) equity, fixed income and multi-asset strategies that address our clients' desire to invest their capital with a dedicated ESG focus, while pursuing strong investment returns; • Multi-asset solutions and services, including dynamic asset allocation, customized target-date funds and target-risk funds; and • Passively managed equity and fixed income strategies, including index, ESG index and enhanced index strategies. Organization As of June 30, 2024, EQH owned approximately 3.5% of the issued and outstanding units representing assignments of beneficial ownership of limited partnership interests in AllianceBernstein Holding L.P. (“AB Holding Units”). AllianceBernstein Corporation (an indirect wholly-owned subsidiary of EQH, “General Partner”) is the general partner of both AllianceBernstein Holding L.P. (“AB Holding”) and AB. AllianceBernstein Corporation owns 100,000 general partnership units in AB Holding and a 1.0% general partnership interest in AB. As of June 30, 2024, the ownership structure of AB, including limited partnership units outstanding as well as the general partner's 1.0% interest, was as follows: EQH and its subsidiaries 59.7 % AB Holding 39.6 Unaffiliated holders 0.7 100.0 % Including both the general partnership and limited partnership interests in AB Holding and AB, EQH and its subsidiaries had an approximate 61.1% economic interest in AB as of June 30, 2024. Basis of Presentation The interim condensed consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”). In the opinion of management, all adjustments, consisting only of normal recurring adjustments, necessary for a fair statement of the interim results, have been made. The preparation of the condensed consolidated financial statements requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the dates of the condensed consolidated financial statements and the reported amounts of revenues and expenses during the interim reporting periods. Actual results could differ from those estimates. The condensed consolidated statement of financial condition as of December 31, 2023 was derived from audited financial statements. Certain disclosures included in the annual financial statements have been condensed or omitted from these financial statements as they are not required for interim financial statements under principles generally accepted in the United States of America ("GAAP") and the rules of the SEC. Principles of Consolidation The condensed consolidated financial statements include AB and its majority-owned and/or controlled subsidiaries, and the consolidated entities that are considered to be variable interest entities (“VIEs”) and/or voting interest entities (“VOEs”) in which AB has a controlling financial interest. Non-controlling interests on the condensed consolidated statements of financial condition include the portion of consolidated company-sponsored investment funds in which we do not have direct equity ownership. All significant inter-company transactions and balances among the consolidated entities have been eliminated. Subsequent Events We have evaluated subsequent events through the date that these financial statements were filed with the SEC and did not identify any subsequent events that would require disclosure in these financial statements. (1) On April 1, 2024 AB and Societe Generale, a leading European bank, completed their transaction to form a jointly owned equity research provider and cash equity trading partner for institutional investors. AB has deconsolidated the Bernstein Research Services business and contributed the business to the joint venture. For further discussion, see Note 17 Divestiture.

Significant Accounting Policies

Significant Accounting Policies	6 Months Ended
	Jun. 30, 2024
Accounting Policies [Abstract]
Significant Accounting Policies	Significant Accounting Policies Recently Adopted Accounting Pronouncements During the three and six months ended June 30, 2024, there have been no recently adopted accounting pronouncements. Accounting Pronouncements Not Yet Adopted In December 2023, the Financial Accounting Standards Board (“FASB”) issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures . This amendment is expected to enhance the transparency and decision usefulness of income tax disclosures by requiring public business entities, on an annual basis, to disclose specific categories in the rate reconciliation, additional information for reconciling items that meet a quantitative threshold and certain information about income taxes paid. This revised guidance is effective for financial statements issued for fiscal years beginning after December 15, 2024. The revised guidance will not have a material impact on our financial condition or results of operations. In November 2023, the FASB issued ASU 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures, which required disclosure of incremental segment information on an annual and interim basis. This ASU is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024, and requires retrospective application to all prior periods presented in the financial statements. We are currently evaluating the impacts of the new standard. Investments in Unconsolidated Joint Ventures Effective April 1, 2024, AB and Societe Generale ("SocGen") completed their previously announced transaction to form a global joint venture with two joint venture holding companies, one outside of North America and one within North America ("NA JV", and together the "JVs"). AB owns a majority interest in the NA JV while SocGen owns a majority interest in the joint venture outside of North America. On April 1, 2024, we deconsolidated our Bernstein Research Services ("BRS") business and contributed the BRS business to the JVs. We have recorded our subsequent investment in each of the JVs under the equity method of accounting under ASC 323 Investments – Equity Method and Joint Ventures , as we retained the ability to exercise significant influence over the operating and financial policies of the JVs but did not retain a controlling interest. Our investments in companies over which we have the ability to exercise significant influence are accounted for under the equity method and are recorded at cost plus our share of earnings and losses. As of June 30, 2024, we owned 66.7% of the NA JV and 49.0% of the joint venture outside of North America and our combined carrying value in the two investments was $295.4 million. The structure of the Board of Directors of the NA JV, which includes two independent directors, in addition to four directors from AB and three directors from SocGen, precludes AB’s control of the Board thereby permitting deconsolidation of the BRS business. In addition, we periodically assess our investments in our joint ventures for impairment if certain events or changes in circumstances occur including, but not limited to, ongoing operating losses, projected decreases in earnings or a significant business disruption. The significant assumptions used to estimate fair value include revenue growth and profitability, capital spending and a discount rate. By their nature, these assumptions and projections are uncertain. If we were to determine the current fair value of our investment was less than the carrying value of the investment, and we determined the shortfall was other than temporary, we would recognize an impairment to the investment in the amount by which the carrying value exceeds its fair value. For further discussion, see Note17 – Divestiture . Reclassification During the second quarter of 2024, amounts previously presented on the condensed consolidated statement of financial condition as "long-term incentive compensation-related" investments are now presented as "other" investments. Prior period amounts previously presented as such have been reclassified to conform to the current periods presentation.

Revenue Recognition

Revenue Recognition	6 Months Ended
	Jun. 30, 2024
Revenue from Contract with Customer [Abstract]
Revenue Recognition	Revenue Recognition Revenues for the three and six months ended June 30, 2024 and 2023 consisted of the following: Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 (in thousands) Subject to contracts with customers: Investment advisory and services fees Base fees $ 774,017 $ 703,371 $ 1,528,256 $ 1,395,699 Performance-based fees 43,310 18,307 73,476 54,886 Bernstein research services (1) — 91,847 96,222 191,885 Distribution revenues All-in-management fees 81,680 70,849 160,104 139,637 12b-1 fees 16,569 15,778 33,174 30,933 Other distribution fees 74,656 58,171 145,317 115,306 Other revenues Shareholder servicing fees 22,356 20,801 44,019 41,094 Other 3,637 3,802 7,457 9,493 1,016,225 982,926 2,088,025 1,978,933 Not subject to contracts with customers: Dividend and interest income, net of broker-dealer related interest expense 22,173 24,744 42,971 47,402 Investment (losses) gains (23,629) 670 (11,886) 5,934 Other revenues 13,174 116 12,984 278 11,718 25,530 44,069 53,614 Total net revenues $ 1,027,943 $ 1,008,456 $ 2,132,094 $ 2,032,547 (1) On April 1, 2024 AB and Societe Generale, a leading European bank, completed their transaction to form a jointly owned equity research provider and cash equity trading partner for institutional investors. AB has deconsolidated the Bernstein Research Services business and contributed the business to the joint venture. For further discussion, see Note 17 Divestiture.

Long-term Incentive Compensatio

Long-term Incentive Compensation Plans	6 Months Ended
	Jun. 30, 2024
Share-Based Payment Arrangement [Abstract]
Long-term Incentive Compensation Plans	Long-term Incentive Compensation Plans We maintain several unfunded, non-qualified long-term incentive compensation plans, under which we grant annual awards to employees, generally in the fourth quarter, and to members of the Board of Directors of the General Partner, who are not employed by our company or by any of our affiliates (“Eligible Directors”). We fund our restricted AB Holding Unit awards either by purchasing AB Holding Units on the open market or purchasing newly-issued AB Holding Units from AB Holding, and then keeping these AB Holding Units in a consolidated rabbi trust until delivering them or retiring them. In accordance with the Amended and Restated Agreement of Limited Partnership of AB (“AB Partnership Agreement”), when AB purchases newly-issued AB Holding Units from AB Holding, AB Holding is required to use the proceeds it receives from AB to purchase the equivalent number of newly-issued AB Units, thus increasing its percentage ownership interest in AB. AB Holding Units held in the consolidated rabbi trust are corporate assets in the name of the trust and are available to the general creditors of AB. Repurchases of AB Holding Units for the three and six months ended June 30, 2024 and 2023 consisted of the following: Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 (in millions) Total amount of AB Holding Units Purchased (1) 0.9 — 1.0 0.5 Total Cash Paid for AB Holding Units Purchased (1) $ 29.0 $ — $ 33.3 $ 18.8 Open Market Purchases of AB Holding Units Purchased (1) 0.6 — 0.6 — Total Cash Paid for Open Market Purchases of AB Holding Units (1) $ 21.5 $ — $ 21.5 $ — (1) Purchased on a trade date basis. The difference between open-market purchases and units retained reflects the retention of AB Holding Units from employees to fulfill statutory tax withholding requirements at the time of delivery of long-term incentive compensation awards. Purchases of AB Holding Units reflected on the condensed consolidated statements of cash flows are net of AB Holding Unit purchases by employees as part of a distribution reinvestment election. Each quarter, we consider whether to implement a plan to repurchase AB Holding Units pursuant to Rules 10b5-1 and 10b-18 under the Securities Exchange Act of 1934, as amended ("Exchange Act"). A plan of this type allows a company to repurchase its shares at times when it otherwise might be prevented from doing so because of self-imposed trading blackout periods or because it possesses material non-public information. Each broker we select has the authority under the terms and limitations specified in the plan to repurchase AB Holding Units on our behalf. Repurchases are subject to regulations promulgated by the SEC as well as certain price, market volume and timing constraints specified in the plan. The plan adopted during the second quarter of 2024 expired at the close of business on July 25, 2024. We may adopt plans in the future to engage in open-market purchases of AB Holding Units to help fund anticipated obligations under our incentive compensation award program and for other corporate purposes.

Net Income per Unit

Net Income per Unit	6 Months Ended
	Jun. 30, 2024
Earnings Per Unit [Abstract]
Net Income per Unit	Net Income per Unit Basic net income per unit is derived by reducing net income for the 1.0% general partnership interest and dividing the remaining 99.0% by the basic weighted average number of limited partnership units outstanding for each period. Diluted net income per unit is derived by reducing net income for the 1.0% general partnership interest and dividing the remaining 99.0% by the total of the diluted weighted average number of limited partnership units outstanding for each period. Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 (in thousands, except per unit amounts) Net income attributable to AB Unitholders $ 309,572 $ 175,737 $ 527,499 $ 369,888 Weighted average limited partnership units outstanding – basic 287,192 285,670 287,034 285,698 Weighted average limited partnership units outstanding – diluted 287,192 285,670 287,034 285,698 Basic net income per AB Unit $ 1.07 $ 0.61 $ 1.82 $ 1.28 Diluted net income per AB Unit $ 1.07 $ 0.61 $ 1.82 $ 1.28

Cash Distributions

Cash Distributions	6 Months Ended
	Jun. 30, 2024
Equity [Abstract]
Cash Distributions	Cash Distributions AB is required to distribute all of its Available Cash Flow, as defined in the AB Partnership Agreement, to its Unitholders and to the General Partner. Available Cash Flow can be summarized as the cash flow received by AB from operations minus such amounts as the General Partner determines, in its sole discretion, should be retained by AB for use in its business, or plus such amounts as the General Partner determines, in its sole discretion, should be released from previously retained cash flow. Typically, Available Cash Flow has been the adjusted diluted net income per unit for the quarter multiplied by the number of general and limited partnership interests at the end of the quarter. In future periods, management anticipates that Available Cash Flow will be based on adjusted diluted net income per unit, unless management determines, with the concurrence of the Board of Directors, that one or more adjustments that are made for adjusted net income should not be made with respect to the Available Cash Flow calculation.

Cash and Securities Segregated

Cash and Securities Segregated Under Federal Regulations and Other Requirements	6 Months Ended
	Jun. 30, 2024
Broker-Dealer [Abstract]
Cash and Securities Segregated Under Federal Regulations and Other Requirements	Cash and Securities Segregated Under Federal Regulations and Other Requirements As of June 30, 2024 and December 31, 2023, $0.6 billion and $0.9 billion of U.S. Treasury Bills were segregated in a special reserve bank custody account for the exclusive benefit of our brokerage customers under Rule 15c3-3 of the Exchange Act.

Investments

Investments	6 Months Ended
	Jun. 30, 2024
Investments, Debt and Equity Securities [Abstract]
Investments	Investments Investments consist of: June 30, December 31, (in thousands) Equity securities: Long-term incentive compensation-related $ 25,321 $ 18,882 Seed capital 158,523 128,771 Equities 42 — Investments in limited partnership hedge funds: Long-term incentive compensation-related $ 10,267 $ 21,151 Seed capital 18,129 57,624 Investment in joint ventures 295,379 — Time deposits 6,165 6,517 Other 10,946 10,609 Total investments $ 524,772 $ 243,554 Total investments related to long-term incentive compensation obligations of $35.6 million and $40.0 million as of June 30, 2024 and December 31, 2023, respectively, consist of company-sponsored mutual funds and hedge funds. For long-term incentive compensation awards granted before 2009, we typically made investments in company-sponsored mutual funds and hedge funds that were notionally elected by plan participants and maintained them (and continue to maintain them) in a consolidated rabbi trust or separate custodial account. The rabbi trust and custodial account enable us to hold such investments separate from our other assets for the purpose of settling our obligations to participants. The investments held in the rabbi trust and custodial account remain available to the general creditors of AB. The underlying investments of hedge funds in which we invest include long and short positions in equity securities, fixed income securities (including various agency and non-agency asset-based securities), currencies, commodities and derivatives (including various swaps and forward contracts). These investments are valued at quoted market prices or, where quoted market prices are not available, are fair valued based on the pricing policies and procedures of the underlying funds. We allocate seed capital to our investment teams to help develop new products and services for our clients. A portion of our seed capital trading investments are equity and fixed income products, primarily in the form of separately-managed account portfolios, U.S. mutual funds, Luxembourg funds, Japanese investment trust management funds or Delaware business trusts. We also may allocate seed capital to investments in private equity funds. Regarding our seed capital investments, the amounts above reflect those funds in which we are not the primary beneficiary of a VIE or hold a controlling financial interest in a VOE. See Note 14, Consolidated Company-Sponsored Investment Funds , for a description of the seed capital investments that we consolidate. As of June 30, 2024 and December 31, 2023, our total seed capital investments were $327.1 million and $394.2 million, respectively. Seed capital investments in unconsolidated company-sponsored investment funds are valued using published net asset values or non-published net asset values if they are not listed on an active exchange but have net asset values that are comparable to funds with published net asset values and have no redemption restrictions. On April 1, 2024, we deconsolidated our BRS business and contributed the business to the JVs. We record our subsequent investment in the JVs under the equity method of accounting and our investment in joint ventures includes our investments in these JVs (for further discussion, see Note 2 Significant Accounting Policies and Note17 Divestitures ). These investments are recorded at cost plus our share of earnings and losses. The portion of unrealized gains (losses) related to equity securities, as defined by ASC 321-10, held as of June 30, 2024 and 2023 were as follows: Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 (in thousands) Net gains recognized during the period $ 986 $ 2,983 $ 12,044 $ 8,447 Less: net (losses) gains recognized during the period on equity securities sold during the period (1,362) 5,259 6,027 5,849 Unrealized gains (losses) recognized during the period on equity securities held $ 2,348 $ (2,276) $ 6,017 $ 2,598

Derivative Instruments

Derivative Instruments	6 Months Ended
	Jun. 30, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments	Derivative Instruments See Note 14, Consolidated Company-Sponsored Investment Funds , for disclosure of derivative instruments held by our consolidated company-sponsored investment funds. We enter various futures, forwards, options and swaps to economically hedge certain seed capital investments. Also, we have currency forwards that help us to economically hedge certain balance sheet exposures. In addition, our options desk trades long and short exchange-traded equity options. We do not hold any derivatives designated in a formal hedge relationship under ASC 815-10, Derivatives and Hedging . The notional value and fair value as of June 30, 2024 and December 31, 2023 for derivative instruments (excluding derivative instruments relating to our options desk trading activities discussed below ) not designated as hedging instruments were as follows: Fair Value Notional Value Derivative Assets Derivative Liabilities (in thousands) June 30, 2024: Exchange-traded futures $ 109,749 $ 32 $ 556 Currency forwards 10,123 5,022 5,027 Interest rate swaps 38,185 657 516 Credit default swaps 49,503 9,153 2,996 Total return swaps 91,378 475 1,661 Option swaps 50,045 — 208 Total derivatives $ 348,983 $ 15,339 $ 10,964 December 31, 2023: Exchange-traded futures $ 116,344 $ 1 $ 3,511 Currency forwards 34,440 4,951 5,597 Interest rate swaps 11,345 294 349 Credit default swaps 139,607 9,265 4,197 Total return swaps 95,021 6 4,391 Option swaps 50,232 1 135 Total derivatives $ 446,989 $ 14,518 $ 18,180 As of June 30, 2024 and December 31, 2023, the derivative assets and liabilities are included in both receivables and payables to brokers and dealers on our condensed consolidated statements of financial condition. The gains and losses for derivative instruments (excluding our options desk trading activities discussed below ) for the three and six months ended June 30, 2024 and 2023 recognized in investment gains (losses) in the condensed consolidated statements of income were as follows: Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 (in thousands) Exchange-traded futures $ (871) $ 2,032 $ (2,450) $ (2,600) Currency forwards (9) 68 355 (37) Interest rate swaps 282 114 425 51 Credit default swaps (91) (2,013) (920) (4,241) Total return swaps (682) (1,645) (3,938) (3,701) Option swaps (259) 583 (52) (827) Net (losses) on derivative instruments $ (1,630) $ (861) $ (6,580) $ (11,355) We may be exposed to credit-related losses in the event of non-performance by counterparties to derivative financial instruments. We minimize our counterparty exposure through a credit review and approval process. In addition, we have executed various collateral arrangements with counterparties to the over-the-counter derivative transactions that require both pledging and accepting collateral in the form of cash. As of June 30, 2024 and December 31, 2023, we held $7.4 million and $5.7 million, respectively, of cash collateral payable to trade counterparties. This obligation to return cash is reported in payables to brokers and dealers in our condensed consolidated statements of financial condition. Although notional amount typically is utilized as the measure of volume in the derivatives market, it is not used as a measure of credit risk. Generally, the current credit exposure of our derivative contracts is limited to the net positive estimated fair value of derivative contracts at the reporting date after taking into consideration the existence of netting agreements and any collateral received. A derivative with positive value (a derivative asset) indicates existence of credit risk because the counterparty would owe us if the contract were closed. Alternatively, a derivative contract with negative value (a derivative liability) indicates we would owe money to the counterparty if the contract were closed. Generally, if there is more than one derivative transaction with a single counterparty, a master netting arrangement exists with respect to derivative transactions with that counterparty to provide for aggregate net settlement. Our standardized contracts for over-the-counter derivative transactions, known as ISDA master agreements, provide for collateralization. As of June 30, 2024 and December 31, 2023, we delivered $4.1 million and $7.8 million, respectively, of cash collateral into brokerage accounts. We report this cash collateral in cash and cash equivalents in our condensed consolidated statement of financial condition. As a result of the deconsolidation of the BRS business on April 1, 2024, we no longer have long and short exchange-traded equity options. As of December 31, 2023, these equity options were classified as held for sale on our condensed consolidated statement of financial condition. For further discussion, see Note 17 Divestiture .

Offsetting Assets and Liabiliti

Offsetting Assets and Liabilities	6 Months Ended
	Jun. 30, 2024
Offsetting [Abstract]
Offsetting Assets and Liabilities	Offsetting Assets and Liabilities See Note 14, Consolidated Company-Sponsored Investment Funds , for disclosure of offsetting assets and liabilities of our consolidated company-sponsored investment funds. Offsetting of assets as of June 30, 2024 and December 31, 2023 was as follows: Gross Amounts of Recognized Assets Gross Amounts Offset in the Statement of Financial Condition Net Amounts of Assets Presented in the Statement of Financial Condition Financial Cash Collateral Net (in thousands) June 30, 2024: Securities borrowed $ 20,528 $ — $ 20,528 $ (20,501) $ — $ 27 Derivatives $ 15,339 $ — $ 15,339 $ — $ (7,419) $ 7,920 December 31, 2023: Securities borrowed $ 23,229 $ — $ 23,229 $ (23,229) $ — $ — Derivatives $ 14,518 $ — $ 14,518 $ — $ (5,691) $ 8,827 Offsetting of liabilities as of June 30, 2024 and December 31, 2023 was as follows: Gross Amounts of Recognized Liabilities Gross Amounts Offset in the Statement of Financial Condition Net Amounts of Liabilities Presented in the Statement of Financial Condition Financial Cash Collateral Net Amount (in thousands) June 30, 2024: Derivatives $ 10,964 $ — $ 10,964 $ — $ (4,059) $ 6,905 December 31, 2023: Securities loaned $ 125,101 $ — $ 125,101 $ (122,369) $ — $ 2,732 Derivatives $ 18,180 $ — $ 18,180 $ — $ (7,795) $ 10,385 Cash collateral, whether pledged or received on derivative instruments, is not considered material and, accordingly, is not disclosed by counterparty.

Fair Value

Fair Value	6 Months Ended
	Jun. 30, 2024
Fair Value Disclosures [Abstract]
Fair Value	Fair Value See Note 14, Consolidated Company-Sponsored Investment Funds , for disclosure of fair value of our consolidated company-sponsored investment funds. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability ( i.e. , the “exit price”) in an orderly transaction between market participants at the measurement date. The three broad levels of fair value hierarchy are as follows: • Level 1 – Quoted prices in active markets are available for identical assets or liabilities as of the reported date. • Level 2 – Quoted prices in markets that are not active or other pricing inputs that are either directly or indirectly observable as of the reported date. • Level 3 – Prices or valuation techniques that are both significant to the fair value measurement and unobservable as of the reported date. These financial instruments do not have two-way markets and are measured using management’s best estimate of fair value, where the inputs into the determination of fair value require significant management judgment or estimation. Assets and Liabilities Measured at Fair Value on a Recurring Basis Valuation of our financial instruments by pricing observability levels as of June 30, 2024 and December 31, 2023 was as follows (in thousands): Level 1 Level 2 Level 3 NAV Expedient (1) Total June 30, 2024: Money markets $ 163,955 $ — $ — $ — $ 163,955 Securities segregated (U.S. Treasury Bills) — 591,569 — — 591,569 Derivatives 32 15,307 — — 15,339 Equity securities 179,045 4,695 116 30 183,886 Other investments 8,292 — — — 8,292 Total assets measured at fair value $ 351,324 $ 611,571 $ 116 $ 30 $ 963,041 Derivatives $ 556 $ 10,408 $ — $ — $ 10,964 Contingent payment arrangements — — 255,166 — 255,166 Total liabilities measured at fair value $ 556 $ 10,408 $ 255,166 $ — $ 266,130 December 31, 2023: Money markets $ 146,906 $ — $ — $ — $ 146,906 Securities segregated (U.S. Treasury Bills) — 867,679 — — 867,679 Derivatives 1 14,517 — — 14,518 Equity securities 113,833 32,104 118 1,598 147,653 Other investments 7,870 — — — 7,870 Total assets measured at fair value $ 268,610 $ 914,300 $ 118 $ 1,598 $ 1,184,626 Derivatives $ 3,511 $ 14,669 $ — $ — $ 18,180 Contingent payment arrangements — — 252,690 — 252,690 Total liabilities measured at fair value $ 3,511 $ 14,669 $ 252,690 $ — $ 270,870 (1) Investments measured at fair value using NAV (or its equivalent) as a practical expedient. (2) Investments in equity method investees that are not measured at fair value in accordance with GAAP. (3) Investments carried at amortized cost that are not measured at fair value in accordance with GAAP. Other investments included in Level 1 of the fair value hierarchy include our investment in a mutual fund measured at fair value ($8.3 million and $7.9 million as of June 30, 2024 and December 31, 2023, respectively). We provide below a description of the fair value methodologies used for instruments measured at fair value, as well as the general classification of such instruments pursuant to the valuation hierarchy: • Money markets : We invest excess cash in various money market funds that are valued based on quoted prices in active markets; these are included in Level 1 of the valuation hierarchy. • Treasury Bills : We hold U.S. Treasury Bills, which are primarily segregated in a special reserve bank custody account as required by Rule 15c3-3 of the Exchange Act. These securities are valued based on quoted yields in secondary markets and are included in Level 2 of the valuation hierarchy. • Equity securities : Our equity securities consist principally of company-sponsored mutual funds with NAVs and various separately-managed portfolios consisting primarily of equity and fixed income mutual funds with quoted prices in active markets, which are included in Level 1 of the valuation hierarchy. In addition, some securities are valued based on observable inputs from recognized pricing vendors, which are included in Level 2 of the valuation hierarchy. • Derivatives : We hold exchange-traded futures with counterparties that are included in Level 1 of the valuation hierarchy. In addition, we also hold currency forward contracts, interest rate swaps, credit default swaps, option swaps and total return swaps with counterparties that are valued based on observable inputs from recognized pricing vendors, which are included in Level 2 of the valuation hierarchy. • Contingent payment arrangements : Contingent payment arrangements relate to contingent payment liabilities associated with various acquisitions. At each reporting date, we estimate the fair values of the contingent consideration expected to be paid based upon probability-weighted AUM and revenue projections, using unobservable market data inputs, which are included in Level 3 of the valuation hierarchy. During the six months ended June 30, 2024 there were no transfers between Level 2 and Level 3 securities. The change in carrying value associated with Level 3 financial instruments carried at fair value, classified as equity securities, is as follows: Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 (in thousands) Balance as of beginning of period $ 114 $ 170 $ 118 $ 129 Unrealized gains (losses), net 2 (49) (2) (8) Balance as of end of period $ 116 $ 121 $ 116 $ 121 Realized and unrealized gains and losses on Level 3 financial instruments are recorded in investment gains and losses in the condensed consolidated statements of income. Our acquisitions may include contingent consideration arrangements as part of the purchase price. The change in carrying value associated with Level 3 financial instruments carried at fair value, classified as contingent payment arrangements, is as follows: Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 (in thousands) Balance as of beginning of period $ 254,108 $ 248,185 $ 252,690 $ 247,309 Accretion 2,558 2,444 5,116 4,887 Payments (1,500) — (2,640) (792) Held for sale reclassification — (775) — (1,550) Balance as of end of period $ 255,166 $ 249,854 $ 255,166 $ 249,854 As of June 30, 2024, the expected revenue growth rates ranged from 2.0% to 29.3%, with a weighted average of 7.9%, calculated using cumulative revenues and range of revenue growth rates. The discount rates range from 1.9% to 10.4%, with a weighted average of 4.6%, calculated using total contingent liabilities and range of discount rates. As of June 30, 2023, the expected revenue growth rates ranged from 2.0% to 83.9%, with a weighted average of 10.3%, calculated using cumulative revenues and a range of revenue growth rates. The discount rates ranged from 1.9% to 10.4%, with a weighted average of 4.6%, calculated using total contingent liabilities and range of discount rates. Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2024
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Legal Proceedings With respect to all significant litigation matters, we consider the likelihood of a negative outcome. If we determine the likelihood of a negative outcome is probable and the amount of the loss can be reasonably estimated, we record an estimated loss for the expected outcome of the litigation. If the likelihood of a negative outcome is reasonably possible and we are able to determine an estimate of the possible loss or range of loss in excess of amounts already accrued, if any, we disclose that fact together with the estimate of the possible loss or range of loss. However, it is often difficult to predict the outcome or estimate a possible loss or range of loss because litigation is subject to inherent uncertainties, particularly when plaintiffs allege substantial or indeterminate damages. Such is also the case when the litigation is in its early stages or when the litigation is highly complex or broad in scope. In these cases, we disclose that we are unable to predict the outcome or estimate a possible loss or range of loss. On December 14, 2022, four individual participants in the Profit Sharing Plan for Employees of AllianceBernstein L.P., (the "Plan") filed a class action complaint (the “Complaint”) in the U.S. District Court for the Southern District of New York against AB, current and former members of the Compensation Committee, and the Investment and Administrative Committees under the Plan. On February 24, 2023, AB filed a motion to dismiss all claims and on March 25, 2024, the Court granted AB’s motion to dismiss the complaint in its entirety. Plaintiff’s time to amend their complaint or appeal the Court’s decision has now expired and we consider this matter concluded. AB may be involved in various matters, including regulatory inquiries, administrative proceedings and litigation, some of which may allege significant damages. It is reasonably possible that we could incur losses pertaining to these other matters, but we cannot currently estimate any such losses, or a range of reasonably possible losses. Management, after consultation with legal counsel, currently believes that the outcome of any other individual matter that is pending or threatened, or all of them combined, will not have a material adverse effect on our results of operations, financial condition or liquidity. However, any inquiry, proceeding or litigation has an element of uncertainty; management cannot determine whether further developments relating to any other individual matter that is pending or threatened, or all of them combined, will have a material adverse effect on our results of operation, financial condition or liquidity in any future reporting period. Guarantees Effective April 1, 2024 AB and SocGen completed their previously announced transaction to form the JVs. At the time of closing, Bernstein Institutional Services LLC (“BIS”), the U.S. broker-dealer subsidiary of the NA JV, entered into a credit facility agreement with SocGen, as lender, providing for up to $60.0 million of working capital. As a condition of the credit facility and until SocGen’s ownership exceeds 50% of NA JV, AB will provide a limited guarantee under which AB will guarantee up to its percentage ownership, currently 66.7%, of any unpaid obligations of BIS .

Leases

Leases	6 Months Ended
	Jun. 30, 2024
Leases [Abstract]
Leases	Leases We lease office space, furniture and office equipment under various operating and financing leases. Our current leases have initial lease terms of one year to 20 years, some of which include options to extend the leases for up to five years, and some of which include options to terminate the leases within one year. Leases included in the condensed consolidated statement of financial condition as of June 30, 2024 and December 31, 2023 were as follows: Classification June 30, 2024 December 31, 2023 (in thousands) Operating Leases Operating lease right-of-use assets Right-of-use assets $ 481,336 $ 312,588 Operating lease liabilities Lease liabilities 546,961 357,623 Finance Leases Property and equipment, gross Right-of-use assets 18,725 18,975 Amortization of right-of-use assets Right-of-use assets (9,651) (7,797) Property and equipment, net 9,074 11,178 Finance lease liabilities Lease liabilities 9,031 11,394 The components of lease expense included in the condensed consolidated statement of income as of June 30, 2024 and June 30, 2023 were as follows: Three Months Ended June 30, Six Months Ended June 30, Classification 2024 2023 2024 2023 (in thousands) Operating lease cost General and administrative $ 27,584 $ 24,120 $ 55,520 $ 47,284 Financing lease cost: Amortization of right-of-use assets General and administrative 1,047 1,203 2,099 2,279 Interest on lease liabilities Interest expense 76 88 160 153 Total finance lease cost 1,123 1,291 2,259 2,432 Variable lease cost (1) General and administrative 10,280 7,432 19,890 16,299 Sublease income General and administrative (8,746) (8,741) (16,469) (17,001) Net lease cost $ 30,241 $ 24,102 $ 61,200 $ 49,014 (1) Variable lease expense includes operating expenses, real estate taxes and employee parking. The sub-lease income represents all revenues received from sub-tenants. It is primarily fixed base rental payments combined with variable reimbursements such as operating expenses, real estate taxes and employee parking. The vast majority of sub-tenant income is derived from our New York metro sub-tenant agreements. Sub-tenant income related to base rent is recorded on a straight-line basis. Maturities of lease liabilities were as follows: Operating Leases Financing Leases Total Year ending December 31, (in thousands) 2024 (excluding the six months ended June 30, 2024) $ 52,076 $ 1,927 $ 54,003 2025 61,864 4,050 65,914 2026 60,648 2,617 63,265 2027 58,144 922 59,066 2028 52,050 142 52,192 Thereafter 464,114 — 464,114 Total lease payments 748,896 9,658 758,554 Less interest (201,935) (627) Present value of lease liabilities $ 546,961 $ 9,031 We have signed a lease that commenced during the first quarter of 2024, relating to approximately 166,000 square feet of space in New York City. Lease term and discount rate: Weighted average remaining lease term (years): Operating leases 13.03 Finance leases 2.55 Weighted average discount rate: Operating leases 4.3 % Finance leases 3.4 % Supplemental non-cash activity related to leases was as follows: Six Months Ended June 30, 2024 2023 (in thousands) Right-of-use assets obtained in exchange for lease obligations (1) : Operating leases 213,235 28,827 Finance leases — 2,096 (1) Represents non-cash activity and, accordingly, is not reflected in the condensed consolidated statement of cash flows.
Leases	Leases We lease office space, furniture and office equipment under various operating and financing leases. Our current leases have initial lease terms of one year to 20 years, some of which include options to extend the leases for up to five years, and some of which include options to terminate the leases within one year. Leases included in the condensed consolidated statement of financial condition as of June 30, 2024 and December 31, 2023 were as follows: Classification June 30, 2024 December 31, 2023 (in thousands) Operating Leases Operating lease right-of-use assets Right-of-use assets $ 481,336 $ 312,588 Operating lease liabilities Lease liabilities 546,961 357,623 Finance Leases Property and equipment, gross Right-of-use assets 18,725 18,975 Amortization of right-of-use assets Right-of-use assets (9,651) (7,797) Property and equipment, net 9,074 11,178 Finance lease liabilities Lease liabilities 9,031 11,394 The components of lease expense included in the condensed consolidated statement of income as of June 30, 2024 and June 30, 2023 were as follows: Three Months Ended June 30, Six Months Ended June 30, Classification 2024 2023 2024 2023 (in thousands) Operating lease cost General and administrative $ 27,584 $ 24,120 $ 55,520 $ 47,284 Financing lease cost: Amortization of right-of-use assets General and administrative 1,047 1,203 2,099 2,279 Interest on lease liabilities Interest expense 76 88 160 153 Total finance lease cost 1,123 1,291 2,259 2,432 Variable lease cost (1) General and administrative 10,280 7,432 19,890 16,299 Sublease income General and administrative (8,746) (8,741) (16,469) (17,001) Net lease cost $ 30,241 $ 24,102 $ 61,200 $ 49,014 (1) Variable lease expense includes operating expenses, real estate taxes and employee parking. The sub-lease income represents all revenues received from sub-tenants. It is primarily fixed base rental payments combined with variable reimbursements such as operating expenses, real estate taxes and employee parking. The vast majority of sub-tenant income is derived from our New York metro sub-tenant agreements. Sub-tenant income related to base rent is recorded on a straight-line basis. Maturities of lease liabilities were as follows: Operating Leases Financing Leases Total Year ending December 31, (in thousands) 2024 (excluding the six months ended June 30, 2024) $ 52,076 $ 1,927 $ 54,003 2025 61,864 4,050 65,914 2026 60,648 2,617 63,265 2027 58,144 922 59,066 2028 52,050 142 52,192 Thereafter 464,114 — 464,114 Total lease payments 748,896 9,658 758,554 Less interest (201,935) (627) Present value of lease liabilities $ 546,961 $ 9,031 We have signed a lease that commenced during the first quarter of 2024, relating to approximately 166,000 square feet of space in New York City. Lease term and discount rate: Weighted average remaining lease term (years): Operating leases 13.03 Finance leases 2.55 Weighted average discount rate: Operating leases 4.3 % Finance leases 3.4 % Supplemental non-cash activity related to leases was as follows: Six Months Ended June 30, 2024 2023 (in thousands) Right-of-use assets obtained in exchange for lease obligations (1) : Operating leases 213,235 28,827 Finance leases — 2,096 (1) Represents non-cash activity and, accordingly, is not reflected in the condensed consolidated statement of cash flows.

Consolidated Company-Sponsored

Consolidated Company-Sponsored Investment Funds	6 Months Ended
	Jun. 30, 2024
Consolidated Company-Sponsored Investment Funds [Abstract]
Consolidated Company-Sponsored Investment Funds	Consolidated Company-Sponsored Investment Funds We regularly provide seed capital to new company-sponsored investment funds. As such, we may consolidate or de-consolidate a variety of company-sponsored investment funds each quarter. Due to the similarity of risks related to our involvement with each company-sponsored investment fund, disclosures required under the VIE model are aggregated, such as disclosures regarding the carrying amount and classification of assets. We are not required to provide financial support to company-sponsored investment funds, and only the assets of such funds are available to settle each fund's own liabilities. Our exposure to loss regarding consolidated company-sponsored investment funds is limited to our investment in, and our management fee earned from, such funds. Equity and debt holders of such funds have no recourse to AB’s assets or to the general credit of AB. The balances of consolidated VIEs and VOEs included in our condensed consolidated statements of financial condition were as follows: June 30, 2024 December 31, 2023 (in thousands) VIEs VOEs Total VIEs VOEs Total Cash and cash equivalents $ 3,733 $ 124 $ 3,857 $ 7,572 $ 167 $ 7,739 Investments 157,618 95,452 253,070 286,619 110,555 397,174 Other assets 2,544 1,132 3,676 15,010 10,289 25,299 Total assets $ 163,895 $ 96,708 $ 260,603 $ 309,201 $ 121,011 $ 430,212 Liabilities $ 1,142 $ 311 $ 1,453 $ 9,699 $ 2,838 $ 12,537 Redeemable non-controlling interest 92,498 15,757 108,255 202,882 6,538 209,420 Partners' capital attributable to AB Unitholders 70,255 80,640 150,895 96,620 111,635 208,255 Total liabilities, redeemable non-controlling interest and partners' capital $ 163,895 $ 96,708 $ 260,603 $ 309,201 $ 121,011 $ 430,212 During the six-month period ended June 30, 2024, we deconsolidated four funds in which we had a seed investment of approximately $46.5 million as of December 31, 2023, due to no longer having a controlling financial interest. Changes in the redeemable non-controlling interest balance during the six-month period ended June 30, 2024 are as follows (in thousands): Redeemable non-controlling interest as of December 31, 2023 $ 209,420 Deconsolidated funds (119,231) Changes in third-party seed investments in consolidated funds 18,066 Redeemable non-controlling interest as of June 30, 2024 $ 108,255 Fair Value Cash and cash equivalents include cash on hand, demand deposits, overnight commercial paper and highly liquid investments with original maturities of three months or less. Due to the short-term nature of these instruments, the recorded value has been determined to approximate fair value. Valuation of consolidated company-sponsored investment funds' financial instruments by pricing observability levels as of June 30, 2024 and December 31, 2023 was as follows (in thousands): Level 1 Level 2 Level 3 Total June 30, 2024: Investments - VIEs $ 16,392 $ 141,226 $ — $ 157,618 Investments - VOEs 13,785 81,667 — 95,452 Derivatives - VIEs 457 107 — 564 Total assets measured at fair value $ 30,634 $ 223,000 $ — $ 253,634 Derivatives - VIEs 99 60 — 159 Total liabilities measured at fair value $ 99 $ 60 $ — $ 159 December 31, 2023: Investments - VIEs $ 49,455 $ 237,164 $ — $ 286,619 Investments - VOEs 9,036 101,519 — 110,555 Derivatives - VIEs 2,139 2,763 — 4,902 Derivatives - VOEs — 8,775 — 8,775 Total assets measured at fair value $ 60,630 $ 350,221 $ — $ 410,851 Derivatives - VIEs $ 944 $ 1,587 $ — $ 2,531 Total liabilities measured at fair value $ 944 $ 1,587 $ — $ 2,531 See Note 11 for a description of the fair value methodologies used for instruments measured at fair value, as well as the general classification of such instruments pursuant to the valuation hierarchy. There were no Level 3 financial instruments carried at fair value within the consolidated company-sponsored investment funds during the six months ended June 30, 2024 and 2023, respectively. Derivative Instruments As of June 30, 2024 and December 31, 2023, the VIEs held $0.4 million and $2.4 million (net), respectively, of futures, forwards and swaps within their portfolios. For the three and six months ended June 30, 2024, we recognized $0.5 million and $0.9 million of losses, respectively, on these derivatives. For the three and six months ended June 30, 2023, we recognized $1.3 million of losses and $0.4 million of gains, respectively, on these derivatives. These gains and losses are recognized in investment gains (losses) in the condensed consolidated statements of income. As of June 30, 2024 and December 31, 2023, the VIEs held $0.8 million and $1.4 million, respectively, of cash collateral payable to trade counterparties. This obligation to return cash is reported in the liabilities of consolidated company-sponsored investment funds in our condensed consolidated statements of financial condition. As of June 30, 2024 and December 31, 2023, the VIEs delivered $1.3 million and $1.4 million, respectively, of cash collateral into brokerage accounts. The VIEs report this cash collateral in the consolidated company-sponsored investment funds cash and cash equivalents in our condensed consolidated statements of financial condition. As of June 30, 2024 and December 31, 2023, the VOEs held zero and $8.8 million futures, forwards, options or swaps within their portfolios. For the three and six months ended June 30, 2024 and June 30, 2023, we recognized no gains or losses on these derivatives. These gains and losses are recognized in investment gains (losses) in the condensed statements of income. As of June 30, 2024, the VOEs held no cash collateral payable to trade counterparties. As of June 30, 2024, the VOEs delivered no cash collateral in brokerage accounts. Offsetting Assets and Liabilities Offsetting of derivative assets of consolidated company-sponsored investment funds as of June 30, 2024 and December 31, 2023 was as follows: Gross Amounts of Recognized Assets Gross Amounts Offset in the Statement of Financial Condition Net Amounts of Assets Presented in the Statement of Financial Condition Financial Cash Collateral Net (in thousands) June 30, 2024: Derivatives - VIEs $ 564 $ — $ 564 $ — $ (564) $ — December 31, 2023: Derivatives - VIEs $ 4,902 $ — $ 4,902 $ — $ (1,415) $ 3,487 Offsetting of derivative liabilities of consolidated company-sponsored investment funds as of June 30, 2024 and December 31, 2023 was as follows: Gross Amounts of Recognized Liabilities Gross Amounts Offset in the Statement of Financial Condition Net Amounts of Liabilities Presented in the Statement of Financial Condition Financial Cash Collateral Net Amount (in thousands) June 30, 2024: Derivatives - VIEs $ 159 $ — $ 159 $ — $ (159) $ — December 31, 2023: Derivatives - VIEs $ 2,531 $ — $ 2,531 $ — $ (1,408) $ 1,123 Cash collateral, whether pledged or received on derivative instruments, is not considered material and, accordingly, is not disclosed by counterparty. Non-Consolidated VIEs As of June 30, 2024, the net assets of company-sponsored investment products that are non-consolidated VIEs are approximately $67.0 billion, and our maximum risk of loss is our investment of $14.3 million in these VIEs and our advisory fee receivables from these VIEs is $103.7 million. As of December 31, 2023, the net assets of company-sponsored investment products that were non-consolidated VIEs was approximately $54.6 billion; our maximum risk of loss was our investment of $10.3 million in these VIEs and our advisory fees receivable from these VIEs was $114.5 million.

Units Outstanding

Units Outstanding	6 Months Ended
	Jun. 30, 2024
Equity [Abstract]
Units Outstanding	Units Outstanding Changes in AB Units outstanding during the six-month period ended June 30, 2024 were as follows: Outstanding as of December 31, 2023 286,609,212 Units issued 850,482 Units retired (1) (685,921) Outstanding as of June 30, 2024 286,773,773 (1) During the six months ended June 30, 2024, we purchased 18,800 AB Units in private transactions and retired them.

Debt

Debt	6 Months Ended
	Jun. 30, 2024
Debt Disclosure [Abstract]
Debt	Debt Credit Facility AB has an $800.0 million committed, unsecured senior revolving credit facility (the “Credit Facility”) with a group of commercial banks and other lenders, which matures on October 13, 2026. The Credit Facility provides for possible increases in the principal amount by up to an aggregate incremental amount of $200.0 million; any such increase is subject to the consent of the affected lenders. The Credit Facility is available for AB and Sanford C. Bernstein & Co., LLC ("SCB LLC") business purposes, including the support of AB’s commercial paper program. Both AB and SCB LLC can draw directly under the Credit Facility and management may draw on the Credit Facility from time to time. AB has agreed to guarantee the obligations of SCB LLC under the Credit Facility. The Credit Facility contains affirmative, negative and financial covenants, which are customary for facilities of this type, including restrictions on dispositions of assets, restrictions on liens, a minimum interest coverage ratio and a maximum leverage ratio. As of June 30, 2024, we were in compliance with these covenants. The Credit Facility also includes customary events of default (with customary grace periods, as applicable), including provisions under which, upon the occurrence of an event of default, all outstanding loans may be accelerated and/or lender’s commitments may be terminated. Also, under such provisions, upon the occurrence of certain insolvency- or bankruptcy-related events of default, all amounts payable under the Credit Facility would automatically become immediately due and payable, and the lender’s commitments automatically would terminate. Amounts under the Credit Facility may be borrowed, repaid and re-borrowed by us from time to time until the maturity of the facility. Voluntary prepayments and commitment reductions requested by us are permitted at any time without a fee (other than customary breakage costs relating to the prepayment of any drawn loans) upon proper notice and subject to a minimum dollar requirement. Borrowings under the Credit Facility bear interest at a rate per annum, which will be, at our option, a rate equal to an applicable margin, which is subject to adjustment based on the credit ratings of AB, plus one of the following indices: a term Secured Overnight Financial Rate; a Prime rate; or the Federal Funds rate. As of June 30, 2024 and December 31, 2023, we had no amounts outstanding under the Credit Facility. Furthermore, during the first six months of 2024 and the full year 2023, we did not draw upon the Credit Facility. EQH Facility AB also has a $900.0 million committed, unsecured senior credit facility (“EQH Facility”) with EQH. The EQH Facility matures on November 4, 2024 and is available for AB's general business purposes. Our intent is to amend and extend this facility before maturity. Borrowings under the EQH Facility generally bear interest at a rate per annum based on prevailing overnight commercial paper rates. The EQH Facility contains affirmative, negative and financial covenants which are substantially similar to those in AB’s committed bank facilities. As of June 30, 2024, we were in compliance with these covenants. The EQH Facility also includes customary events of default substantially similar to those in AB’s committed bank facilities, including provisions under which, upon the occurrence of an event of default, all outstanding loans may be accelerated and/or the lender’s commitment may be terminated. Amounts under the EQH Facility may be borrowed, repaid and re-borrowed by us from time to time until the maturity of the facility. AB or EQH may reduce or terminate the commitment at any time without penalty upon proper notice. EQH also may terminate the facility immediately upon a change of control of our general partner. As of June 30, 2024 and December 31, 2023, AB had $620.0 million and $900.0 million outstanding under the EQH Facility, respectively, with an interest rate of approximately 5.3%, respectively. Average daily borrowings on the EQH Facility for the first six months of 2024 and the full year 2023 were $639.1 million and $743.1 million, respectively, with weighted average interest rates of approximately 5.3% and 4.9%, respectively. EQH Uncommitted Facility In addition to the EQH Facility, AB has a $300.0 million uncommitted, unsecured senior credit facility (“EQH Uncommitted Facility”) with EQH. The EQH Uncommitted Facility matures on September 1, 2024 and is available for AB's general business purposes. Our intent is to amend and extend this facility before maturity. Borrowings under the EQH Uncommitted Facility generally bear interest at a rate per annum based on prevailing overnight commercial paper rates. The EQH Uncommitted Facility contains affirmative, negative and financial covenants which are substantially similar to those in the EQH Facility. As of June 30, 2024, we were in compliance with these covenants. As of June 30, 2024 and December 31, 2023 we had no amounts outstanding on the EQH Uncommitted Facility. During the first six months of 2024, we did not draw upon the EQH Uncommitted Facility. Average daily borrowing for the full year 2023 were $3.6 million with a weighted average interest rate of approximately 4.6%. Commercial Paper As of June 30, 2024 we had no commercial paper outstanding. As of December 31, 2023, we had $254.3 million of commercial paper outstanding with an interest rate of 5.4%. The commercial paper is short term in nature, and as such, recorded value is estimated to approximate fair value (and considered a Level 2 security in the fair value hierarchy). Average daily borrowings of commercial paper during the first six months of 2024 and full year 2023 were $367.0 million and $267.6 million, respectively, with weighted average interest rates of approximately 5.4% and 5.2%, respectively. SCB Lines of Credit SCB LLC has five uncommitted lines of credit with five financial institutions. Four of these lines of credit permit us to borrow up to an aggregate of approximately $315.0 million, with AB named as an additional borrower, while the other line has no stated limit. AB has agreed to guarantee the obligations on SCB LLC under these lines of credit. As of June 30, 2024 and December 31, 2023, SCB LLC had no outstanding balance on these lines of credit. Average daily borrowings during the first six months of 2024 and full year 2023 were $1.3 million and $1.1 million, respectively, with weighted average interest rates of approximately 8.5% and 7.8%, respectively.

Divestiture

Divestiture	6 Months Ended
	Jun. 30, 2024
Discontinued Operations and Disposal Groups [Abstract]
Divestiture	Divestiture On November 22, 2022, AB and SocGen, a leading European bank, announced plans to form a joint venture combining their respective cash equities and research businesses (the “Initial Plan”). In the Initial Plan, AB would own a 49% interest in the global joint venture and SocGen would own a 51% interest, with an option to reach 100% ownership after five years. During the fourth quarter of 2023, AB and SocGen negotiated a revised plan (the "Revised Plan") to form a global joint venture with two joint venture holding companies, one outside of North America and one within North America ("NA JV", and together the "JVs"). Effective April 1, 2024, AB and SocGen completed their previously announced transaction in accordance with the Revised Plan. AB owns a 66.7% majority interest in the NA JV while SocGen owns a 51% majority interest in the joint venture outside of North America. While AB currently owns a majority of the NA JV, the structure of the Board of Directors of the NA JV, which includes two independent directors, in addition to four directors from AB and three directors from SocGen, precludes AB’s control of the Board thereby permitting deconsolidation of the BRS business. Going forward, AB will maintain an equity method investment in each of the JVs and report on the performance of the two JV holding companies on a combined basis. As a result of the greater value of the business AB contributed to the JVs, SocGen paid AB $304.0 million in cash to equalize the value of the contributions by AB and SocGen to the JVs. The cash payment of $304.0 million included $102.6 million of prepaid consideration for an option, exercisable by AB during the next five years, that would result in SocGen having a 51% ownership of the NA JV (the "AB option") and bringing the transaction ownership terms back in line with the Initial Plan. AB's option may only be exercised upon receipt of appropriate regulatory approvals. The $304.0 million cash payment was used to pay down debt under AB’s existing credit facilities. Under the terms of the transaction and assuming AB exercises its option as noted above, SocGen would increase its ownership to a majority interest of the NA JV, without further consideration payable. AB has an additional option to sell its ownership interests in the JVs to SocGen after five years, at the fair market value of AB’s interests in the JVs, subject to regulatory approval. The ultimate objective of SocGen and AB is for SocGen to eventually own 100% of the JVs after five years. AB has deconsolidated the BRS business and retained the Bernstein Private Wealth Management business within its existing U.S. broker dealer, SCB LLC. AB’s Private Wealth Management business continues to operate through SCB LLC and SCB LLC continues to serve as custodian for nearly all Private Wealth assets under management. AB continues to serve as investment adviser to these Private Wealth clients. Further , we entered into certain transition services agreements with the JVs in connection with the divestiture of the BRS business. From April 1, 2024 through June 30, 2024 we provided services and recognized revenues of $12.4 million associated with these transition services agreements. The net carrying amount of the BRS business assets and liabilities included in the sale was $312.1 million and consisted of the following: April 1, 2024 (in thousands) Cash and cash equivalents $ 338,226 Receivables, net: Brokers and dealers 31,427 Brokerage clients 2,817 Other fees 14,719 Investments 9,555 Furniture and equipment, net 5,472 Other assets 44,751 Right-of-use assets 4,422 Intangible assets 3,850 Goodwill 159,826 Total assets sold $ 615,065 Payables: Brokers and dealers $ 15,271 Brokerage clients 14,110 AP and Accrued Expenses 134,979 Other liabilities 10,370 Accrued compensation and benefits 42,069 Debt 86,200 Total liabilities sold $ 302,999 As a result of the sale, we recognized a pre-tax gain of $134.6 million during the second quarter of 2024, calculated as follows: April 1, 2024 (in thousands) Cash proceeds $ 303,980 Fair value of equity interest in the JVs 283,871 Net carrying amount of assets and liabilities divested (312,066) Consideration for future put option to be exercised by AB (102,550) Cumulative translation losses (10,197) Reorganization costs (28,483) Pre-tax gain on divestiture $ 134,555 We deconsolidated approximately $312.1 million of net assets and liabilities of the BRS business and contributed those assets and liabilities to the JVs. We recorded an initial investment in the JVs, at fair value of $283.9 million. The fair value of the equity method investments was determined using a dividend discount model whereby a forecast of net banking income attributable to each of the JVs is discounted using an estimated cost of capital to determine the present value of expected future dividends. In addition, we recorded a liability in accounts payable and accrued expenses on the condensed consolidated statement of financial condition of approximately $102.6 million, based on the negotiated terms of the Revised Plan, related to the AB option. Upon receipt of appropriate regulatory approvals, AB intends to exercise the AB option and will recognize a gain or loss at that time, dependent upon the fair market value of the additional equity interest that would result in SocGen having 51% ownership interest in NA JV. For discussion on our accounting policy related to investments in unconsolidated joint ventures, see Note 2 Significant Accounting Policies. The net cash contributed at transaction close from the divestiture of the BRS business as presented under Cash Flows from Investing Activities represents the cash portion of the sale consideration, which was determined as the fair value of the sale consideration, adjusted by the cash transferred to the joint ventures and direct costs to sell. The following table summarizes the different components of the initial business divestiture presented under cash flows from investing activities: June 30, 2024 (in thousands) Cash proceeds from buyer $ 303,980 Initial cash contributed to joint ventures from transferring balance sheet (338,226) Direct costs to sell (5,950) Cash outflow from divestiture (40,196) Included in the initial cash contribution to the joint ventures is approximately $69.1 million of prefunded cash received from SocGen in advance of closing due to certain banking holidays in the U.S. and internationally. The $69.1 million was included in held for sale cash as of March 31, 2024 with an offsetting liability recorded in accounts payable and accrued expenses in held for sale liabilities on the condensed consolidated statement of financial condition. At transaction close, AB contributed this cash to the joint ventures on behalf of SocGen. As of December 31, 2023 the assets and liabilities of AB's research services business (“the disposal group”) were classified as held for sale on the condensed consolidated statement of financial condition and recorded at fair value, less cost to sell. As a result of classifying these assets as held for sale, we recognized a cumulative non-cash valuation adjustment of $6.6 million as o f December 31, 2023, respectively, to recognize the net carrying value at lower of cost or fair value, less estimated costs to sell. The following table summarizes the assets and liabilities of the disposal group classified as held for sale on the condensed consolidated statement of financial condition as of December 31, 2023: December 31, 2023 (in thousands) Cash and cash equivalents $ 153,047 Receivables, net: Brokers and dealers 32,669 Brokerage clients 74,351 Other fees 15,326 Investments 17,029 Furniture and equipment, net 5,807 Other assets 104,228 Right-of-use assets 5,032 Intangible assets 4,061 Goodwill 159,826 Valuation adjustment (allowance) on disposal group (6,600) Total assets held for sale $ 564,776 Payables: Brokers and dealers $ 39,359 Brokerage clients 16,885 Other liabilities 67,938 Accrued compensation and benefits 29,160 Total liabilities held for sale $ 153,342 As of December 31, 2023, cash and cash equivalents classified as held for sale included in the condensed consolidated statement of cash flows was $153.0 million. We have determined that the exit from the sell-side research business did not represent a strategic shift that has had, or is likely to have a major effect on our consolidated results of operations. Accordingly, we did not classify the disposal group as discontinued operations. The results of operations of the disposal group up to the respective date of sale were included in our consolidated results of operations for all periods presented. The lower of amortized cost or fair value adjustment upon transferring these assets to held for sale was not material.

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Pay vs Performance Disclosure
Net income	$ 309,572	$ 175,737	$ 527,499	$ 369,888

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
	Jun. 30, 2024
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Business Description Organiza_2

Business Description Organization and Basis of Presentation (Policies)	6 Months Ended
	Jun. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation
Principles of Consolidation	Principles of Consolidation
Subsequent Events	Subsequent Events We have evaluated subsequent events through the date that these financial statements were filed with the SEC and did not identify any subsequent events that would require disclosure in these financial statements. (1) On April 1, 2024 AB and Societe Generale, a leading European bank, completed their transaction to form a jointly owned equity research provider and cash equity trading partner for institutional investors. AB has deconsolidated the Bernstein Research Services business and contributed the business to the joint venture. For further discussion, see Note 17 Divestiture.
Recently Adopted Accounting Pronouncements and Accounting Pronouncements Not Yet Adopted	Recently Adopted Accounting Pronouncements During the three and six months ended June 30, 2024, there have been no recently adopted accounting pronouncements. Accounting Pronouncements Not Yet Adopted In December 2023, the Financial Accounting Standards Board (“FASB”) issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures . This amendment is expected to enhance the transparency and decision usefulness of income tax disclosures by requiring public business entities, on an annual basis, to disclose specific categories in the rate reconciliation, additional information for reconciling items that meet a quantitative threshold and certain information about income taxes paid. This revised guidance is effective for financial statements issued for fiscal years beginning after December 15, 2024. The revised guidance will not have a material impact on our financial condition or results of operations. In November 2023, the FASB issued ASU 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures, which required disclosure of incremental segment information on an annual and interim basis. This ASU is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024, and requires retrospective application to all prior periods presented in the financial statements. We are currently evaluating the impacts of the new standard.
Investments in Unconsolidated Joint Ventures	Investments in Unconsolidated Joint Ventures Effective April 1, 2024, AB and Societe Generale ("SocGen") completed their previously announced transaction to form a global joint venture with two joint venture holding companies, one outside of North America and one within North America ("NA JV", and together the "JVs"). AB owns a majority interest in the NA JV while SocGen owns a majority interest in the joint venture outside of North America. On April 1, 2024, we deconsolidated our Bernstein Research Services ("BRS") business and contributed the BRS business to the JVs. We have recorded our subsequent investment in each of the JVs under the equity method of accounting under ASC 323 Investments – Equity Method and Joint Ventures , as we retained the ability to exercise significant influence over the operating and financial policies of the JVs but did not retain a controlling interest. Our investments in companies over which we have the ability to exercise significant influence are accounted for under the equity method and are recorded at cost plus our share of earnings and losses. As of June 30, 2024, we owned 66.7% of the NA JV and 49.0% of the joint venture outside of North America and our combined carrying value in the two investments was $295.4 million. The structure of the Board of Directors of the NA JV, which includes two independent directors, in addition to four directors from AB and three directors from SocGen, precludes AB’s control of the Board thereby permitting deconsolidation of the BRS business. In addition, we periodically assess our investments in our joint ventures for impairment if certain events or changes in circumstances occur including, but not limited to, ongoing operating losses, projected decreases in earnings or a significant business disruption. The significant assumptions used to estimate fair value include revenue growth and profitability, capital spending and a discount rate. By their nature, these assumptions and projections are uncertain. If we were to determine the current fair value of our investment was less than the carrying value of the investment, and we determined the shortfall was other than temporary, we would recognize an impairment to the investment in the amount by which the carrying value exceeds its fair value. For further discussion, see Note17 – Divestiture
Reclassification	Reclassification During the second quarter of 2024, amounts previously presented on the condensed consolidated statement of financial condition as "long-term incentive compensation-related" investments are now presented as "other" investments. Prior period amounts previously presented as such have been reclassified to conform to the current periods presentation.

Business Description Organiza_3

Business Description Organization and Basis of Presentation (Tables)	6 Months Ended
	Jun. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Ownership Interest, Including Limited Partners	As of June 30, 2024, the ownership structure of AB, including limited partnership units outstanding as well as the general partner's 1.0% interest, was as follows: EQH and its subsidiaries 59.7 % AB Holding 39.6 Unaffiliated holders 0.7 100.0 %

Revenue Recognition (Tables)

Revenue Recognition (Tables)	6 Months Ended
	Jun. 30, 2024
Revenue from Contract with Customer [Abstract]
Schedule of Revenues	Revenues for the three and six months ended June 30, 2024 and 2023 consisted of the following: Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 (in thousands) Subject to contracts with customers: Investment advisory and services fees Base fees $ 774,017 $ 703,371 $ 1,528,256 $ 1,395,699 Performance-based fees 43,310 18,307 73,476 54,886 Bernstein research services (1) — 91,847 96,222 191,885 Distribution revenues All-in-management fees 81,680 70,849 160,104 139,637 12b-1 fees 16,569 15,778 33,174 30,933 Other distribution fees 74,656 58,171 145,317 115,306 Other revenues Shareholder servicing fees 22,356 20,801 44,019 41,094 Other 3,637 3,802 7,457 9,493 1,016,225 982,926 2,088,025 1,978,933 Not subject to contracts with customers: Dividend and interest income, net of broker-dealer related interest expense 22,173 24,744 42,971 47,402 Investment (losses) gains (23,629) 670 (11,886) 5,934 Other revenues 13,174 116 12,984 278 11,718 25,530 44,069 53,614 Total net revenues $ 1,027,943 $ 1,008,456 $ 2,132,094 $ 2,032,547 (1) On April 1, 2024 AB and Societe Generale, a leading European bank, completed their transaction to form a jointly owned equity research provider and cash equity trading partner for institutional investors. AB has deconsolidated the Bernstein Research Services business and contributed the business to the joint venture. For further discussion, see Note 17 Divestiture.

Long-term Incentive Compensat_2

Long-term Incentive Compensation Plans (Tables)	6 Months Ended
	Jun. 30, 2024
Share-Based Payment Arrangement [Abstract]
Schedule of Share-based Compensation, Employee Stock Purchase Plan, Activity	Repurchases of AB Holding Units for the three and six months ended June 30, 2024 and 2023 consisted of the following: Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 (in millions) Total amount of AB Holding Units Purchased (1) 0.9 — 1.0 0.5 Total Cash Paid for AB Holding Units Purchased (1) $ 29.0 $ — $ 33.3 $ 18.8 Open Market Purchases of AB Holding Units Purchased (1) 0.6 — 0.6 — Total Cash Paid for Open Market Purchases of AB Holding Units (1) $ 21.5 $ — $ 21.5 $ — (1) Purchased on a trade date basis. The difference between open-market purchases and units retained reflects the retention of AB Holding Units from employees to fulfill statutory tax withholding requirements at the time of delivery of long-term incentive compensation awards.

Net Income per Unit (Tables)

Net Income per Unit (Tables)	6 Months Ended
	Jun. 30, 2024
Earnings Per Unit [Abstract]
Schedule of Earnings Per Unit, Basic and Diluted	Basic net income per unit is derived by reducing net income for the 1.0% general partnership interest and dividing the remaining 99.0% by the basic weighted average number of limited partnership units outstanding for each period. Diluted net income per unit is derived by reducing net income for the 1.0% general partnership interest and dividing the remaining 99.0% by the total of the diluted weighted average number of limited partnership units outstanding for each period. Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 (in thousands, except per unit amounts) Net income attributable to AB Unitholders $ 309,572 $ 175,737 $ 527,499 $ 369,888 Weighted average limited partnership units outstanding – basic 287,192 285,670 287,034 285,698 Weighted average limited partnership units outstanding – diluted 287,192 285,670 287,034 285,698 Basic net income per AB Unit $ 1.07 $ 0.61 $ 1.82 $ 1.28 Diluted net income per AB Unit $ 1.07 $ 0.61 $ 1.82 $ 1.28

Investments (Tables)

Investments (Tables)	6 Months Ended
	Jun. 30, 2024
Investments, Debt and Equity Securities [Abstract]
Summary of Investments	Investments consist of: June 30, December 31, (in thousands) Equity securities: Long-term incentive compensation-related $ 25,321 $ 18,882 Seed capital 158,523 128,771 Equities 42 — Investments in limited partnership hedge funds: Long-term incentive compensation-related $ 10,267 $ 21,151 Seed capital 18,129 57,624 Investment in joint ventures 295,379 — Time deposits 6,165 6,517 Other 10,946 10,609 Total investments $ 524,772 $ 243,554
Summary of the Cost and Fair Value of Available-For-Sale and Trading Investments	The portion of unrealized gains (losses) related to equity securities, as defined by ASC 321-10, held as of June 30, 2024 and 2023 were as follows: Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 (in thousands) Net gains recognized during the period $ 986 $ 2,983 $ 12,044 $ 8,447 Less: net (losses) gains recognized during the period on equity securities sold during the period (1,362) 5,259 6,027 5,849 Unrealized gains (losses) recognized during the period on equity securities held $ 2,348 $ (2,276) $ 6,017 $ 2,598

Derivative Instruments (Tables)

Derivative Instruments (Tables)	6 Months Ended
	Jun. 30, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Notional Value and Fair Value of Derivative Instruments	The notional value and fair value as of June 30, 2024 and December 31, 2023 for derivative instruments (excluding derivative instruments relating to our options desk trading activities discussed below ) not designated as hedging instruments were as follows: Fair Value Notional Value Derivative Assets Derivative Liabilities (in thousands) June 30, 2024: Exchange-traded futures $ 109,749 $ 32 $ 556 Currency forwards 10,123 5,022 5,027 Interest rate swaps 38,185 657 516 Credit default swaps 49,503 9,153 2,996 Total return swaps 91,378 475 1,661 Option swaps 50,045 — 208 Total derivatives $ 348,983 $ 15,339 $ 10,964 December 31, 2023: Exchange-traded futures $ 116,344 $ 1 $ 3,511 Currency forwards 34,440 4,951 5,597 Interest rate swaps 11,345 294 349 Credit default swaps 139,607 9,265 4,197 Total return swaps 95,021 6 4,391 Option swaps 50,232 1 135 Total derivatives $ 446,989 $ 14,518 $ 18,180
Schedule of Gains and Losses for Derivative Instruments Recognized in Investment Gains (Losses)	The gains and losses for derivative instruments (excluding our options desk trading activities discussed below ) for the three and six months ended June 30, 2024 and 2023 recognized in investment gains (losses) in the condensed consolidated statements of income were as follows: Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 (in thousands) Exchange-traded futures $ (871) $ 2,032 $ (2,450) $ (2,600) Currency forwards (9) 68 355 (37) Interest rate swaps 282 114 425 51 Credit default swaps (91) (2,013) (920) (4,241) Total return swaps (682) (1,645) (3,938) (3,701) Option swaps (259) 583 (52) (827) Net (losses) on derivative instruments $ (1,630) $ (861) $ (6,580) $ (11,355)

Offsetting Assets and Liabili_2

Offsetting Assets and Liabilities (Tables)	6 Months Ended
	Jun. 30, 2024
Offsetting [Abstract]
Schedule of Offsetting of Financial Assets	Offsetting of assets as of June 30, 2024 and December 31, 2023 was as follows: Gross Amounts of Recognized Assets Gross Amounts Offset in the Statement of Financial Condition Net Amounts of Assets Presented in the Statement of Financial Condition Financial Cash Collateral Net (in thousands) June 30, 2024: Securities borrowed $ 20,528 $ — $ 20,528 $ (20,501) $ — $ 27 Derivatives $ 15,339 $ — $ 15,339 $ — $ (7,419) $ 7,920 December 31, 2023: Securities borrowed $ 23,229 $ — $ 23,229 $ (23,229) $ — $ — Derivatives $ 14,518 $ — $ 14,518 $ — $ (5,691) $ 8,827 Offsetting of derivative assets of consolidated company-sponsored investment funds as of June 30, 2024 and December 31, 2023 was as follows: Gross Amounts of Recognized Assets Gross Amounts Offset in the Statement of Financial Condition Net Amounts of Assets Presented in the Statement of Financial Condition Financial Cash Collateral Net (in thousands) June 30, 2024: Derivatives - VIEs $ 564 $ — $ 564 $ — $ (564) $ — December 31, 2023: Derivatives - VIEs $ 4,902 $ — $ 4,902 $ — $ (1,415) $ 3,487
Schedule of Offsetting of Financial Liabilities	Offsetting of liabilities as of June 30, 2024 and December 31, 2023 was as follows: Gross Amounts of Recognized Liabilities Gross Amounts Offset in the Statement of Financial Condition Net Amounts of Liabilities Presented in the Statement of Financial Condition Financial Cash Collateral Net Amount (in thousands) June 30, 2024: Derivatives $ 10,964 $ — $ 10,964 $ — $ (4,059) $ 6,905 December 31, 2023: Securities loaned $ 125,101 $ — $ 125,101 $ (122,369) $ — $ 2,732 Derivatives $ 18,180 $ — $ 18,180 $ — $ (7,795) $ 10,385 Offsetting of derivative liabilities of consolidated company-sponsored investment funds as of June 30, 2024 and December 31, 2023 was as follows: Gross Amounts of Recognized Liabilities Gross Amounts Offset in the Statement of Financial Condition Net Amounts of Liabilities Presented in the Statement of Financial Condition Financial Cash Collateral Net Amount (in thousands) June 30, 2024: Derivatives - VIEs $ 159 $ — $ 159 $ — $ (159) $ — December 31, 2023: Derivatives - VIEs $ 2,531 $ — $ 2,531 $ — $ (1,408) $ 1,123

Fair Value (Tables)

Fair Value (Tables)	6 Months Ended
	Jun. 30, 2024
Fair Value Disclosures [Abstract]
Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis	Valuation of our financial instruments by pricing observability levels as of June 30, 2024 and December 31, 2023 was as follows (in thousands): Level 1 Level 2 Level 3 NAV Expedient (1) Total June 30, 2024: Money markets $ 163,955 $ — $ — $ — $ 163,955 Securities segregated (U.S. Treasury Bills) — 591,569 — — 591,569 Derivatives 32 15,307 — — 15,339 Equity securities 179,045 4,695 116 30 183,886 Other investments 8,292 — — — 8,292 Total assets measured at fair value $ 351,324 $ 611,571 $ 116 $ 30 $ 963,041 Derivatives $ 556 $ 10,408 $ — $ — $ 10,964 Contingent payment arrangements — — 255,166 — 255,166 Total liabilities measured at fair value $ 556 $ 10,408 $ 255,166 $ — $ 266,130 December 31, 2023: Money markets $ 146,906 $ — $ — $ — $ 146,906 Securities segregated (U.S. Treasury Bills) — 867,679 — — 867,679 Derivatives 1 14,517 — — 14,518 Equity securities 113,833 32,104 118 1,598 147,653 Other investments 7,870 — — — 7,870 Total assets measured at fair value $ 268,610 $ 914,300 $ 118 $ 1,598 $ 1,184,626 Derivatives $ 3,511 $ 14,669 $ — $ — $ 18,180 Contingent payment arrangements — — 252,690 — 252,690 Total liabilities measured at fair value $ 3,511 $ 14,669 $ 252,690 $ — $ 270,870 (1) Investments measured at fair value using NAV (or its equivalent) as a practical expedient. (2) Investments in equity method investees that are not measured at fair value in accordance with GAAP. (3) Investments carried at amortized cost that are not measured at fair value in accordance with GAAP. Valuation of consolidated company-sponsored investment funds' financial instruments by pricing observability levels as of June 30, 2024 and December 31, 2023 was as follows (in thousands): Level 1 Level 2 Level 3 Total June 30, 2024: Investments - VIEs $ 16,392 $ 141,226 $ — $ 157,618 Investments - VOEs 13,785 81,667 — 95,452 Derivatives - VIEs 457 107 — 564 Total assets measured at fair value $ 30,634 $ 223,000 $ — $ 253,634 Derivatives - VIEs 99 60 — 159 Total liabilities measured at fair value $ 99 $ 60 $ — $ 159 December 31, 2023: Investments - VIEs $ 49,455 $ 237,164 $ — $ 286,619 Investments - VOEs 9,036 101,519 — 110,555 Derivatives - VIEs 2,139 2,763 — 4,902 Derivatives - VOEs — 8,775 — 8,775 Total assets measured at fair value $ 60,630 $ 350,221 $ — $ 410,851 Derivatives - VIEs $ 944 $ 1,587 $ — $ 2,531 Total liabilities measured at fair value $ 944 $ 1,587 $ — $ 2,531
Schedule of Change in Carrying Value Level 3 Financial Instruments	The change in carrying value associated with Level 3 financial instruments carried at fair value, classified as equity securities, is as follows: Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 (in thousands) Balance as of beginning of period $ 114 $ 170 $ 118 $ 129 Unrealized gains (losses), net 2 (49) (2) (8) Balance as of end of period $ 116 $ 121 $ 116 $ 121
Schedule of Contingent Payment Arrangements Level 3 Financial Instruments	The change in carrying value associated with Level 3 financial instruments carried at fair value, classified as contingent payment arrangements, is as follows: Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 (in thousands) Balance as of beginning of period $ 254,108 $ 248,185 $ 252,690 $ 247,309 Accretion 2,558 2,444 5,116 4,887 Payments (1,500) — (2,640) (792) Held for sale reclassification — (775) — (1,550) Balance as of end of period $ 255,166 $ 249,854 $ 255,166 $ 249,854

Leases (Tables)

Leases (Tables)	6 Months Ended
	Jun. 30, 2024
Leases [Abstract]
Schedule of Leases	Leases included in the condensed consolidated statement of financial condition as of June 30, 2024 and December 31, 2023 were as follows: Classification June 30, 2024 December 31, 2023 (in thousands) Operating Leases Operating lease right-of-use assets Right-of-use assets $ 481,336 $ 312,588 Operating lease liabilities Lease liabilities 546,961 357,623 Finance Leases Property and equipment, gross Right-of-use assets 18,725 18,975 Amortization of right-of-use assets Right-of-use assets (9,651) (7,797) Property and equipment, net 9,074 11,178 Finance lease liabilities Lease liabilities 9,031 11,394
Schedule of Components of Lease Expense and Supplemental Cash Flow Information	The components of lease expense included in the condensed consolidated statement of income as of June 30, 2024 and June 30, 2023 were as follows: Three Months Ended June 30, Six Months Ended June 30, Classification 2024 2023 2024 2023 (in thousands) Operating lease cost General and administrative $ 27,584 $ 24,120 $ 55,520 $ 47,284 Financing lease cost: Amortization of right-of-use assets General and administrative 1,047 1,203 2,099 2,279 Interest on lease liabilities Interest expense 76 88 160 153 Total finance lease cost 1,123 1,291 2,259 2,432 Variable lease cost (1) General and administrative 10,280 7,432 19,890 16,299 Sublease income General and administrative (8,746) (8,741) (16,469) (17,001) Net lease cost $ 30,241 $ 24,102 $ 61,200 $ 49,014 (1) Variable lease expense includes operating expenses, real estate taxes and employee parking. Lease term and discount rate: Weighted average remaining lease term (years): Operating leases 13.03 Finance leases 2.55 Weighted average discount rate: Operating leases 4.3 % Finance leases 3.4 % Supplemental non-cash activity related to leases was as follows: Six Months Ended June 30, 2024 2023 (in thousands) Right-of-use assets obtained in exchange for lease obligations (1) : Operating leases 213,235 28,827 Finance leases — 2,096 (1) Represents non-cash activity and, accordingly, is not reflected in the condensed consolidated statement of cash flows.
Schedule of Maturities of Finance Lease Liabilities	Maturities of lease liabilities were as follows: Operating Leases Financing Leases Total Year ending December 31, (in thousands) 2024 (excluding the six months ended June 30, 2024) $ 52,076 $ 1,927 $ 54,003 2025 61,864 4,050 65,914 2026 60,648 2,617 63,265 2027 58,144 922 59,066 2028 52,050 142 52,192 Thereafter 464,114 — 464,114 Total lease payments 748,896 9,658 758,554 Less interest (201,935) (627) Present value of lease liabilities $ 546,961 $ 9,031
Schedule of Maturities of Operating Lease Liabilities	Maturities of lease liabilities were as follows: Operating Leases Financing Leases Total Year ending December 31, (in thousands) 2024 (excluding the six months ended June 30, 2024) $ 52,076 $ 1,927 $ 54,003 2025 61,864 4,050 65,914 2026 60,648 2,617 63,265 2027 58,144 922 59,066 2028 52,050 142 52,192 Thereafter 464,114 — 464,114 Total lease payments 748,896 9,658 758,554 Less interest (201,935) (627) Present value of lease liabilities $ 546,961 $ 9,031

Consolidated Company-Sponsore_2

Consolidated Company-Sponsored Investment Funds (Tables)	6 Months Ended
	Jun. 30, 2024
Consolidated Company-Sponsored Investment Funds [Abstract]
Balances of Consolidated VIEs and VOEs included in Statement of Financial Condition	The balances of consolidated VIEs and VOEs included in our condensed consolidated statements of financial condition were as follows: June 30, 2024 December 31, 2023 (in thousands) VIEs VOEs Total VIEs VOEs Total Cash and cash equivalents $ 3,733 $ 124 $ 3,857 $ 7,572 $ 167 $ 7,739 Investments 157,618 95,452 253,070 286,619 110,555 397,174 Other assets 2,544 1,132 3,676 15,010 10,289 25,299 Total assets $ 163,895 $ 96,708 $ 260,603 $ 309,201 $ 121,011 $ 430,212 Liabilities $ 1,142 $ 311 $ 1,453 $ 9,699 $ 2,838 $ 12,537 Redeemable non-controlling interest 92,498 15,757 108,255 202,882 6,538 209,420 Partners' capital attributable to AB Unitholders 70,255 80,640 150,895 96,620 111,635 208,255 Total liabilities, redeemable non-controlling interest and partners' capital $ 163,895 $ 96,708 $ 260,603 $ 309,201 $ 121,011 $ 430,212
Schedule of Redeemable Noncontrolling Interest	Changes in the redeemable non-controlling interest balance during the six-month period ended June 30, 2024 are as follows (in thousands): Redeemable non-controlling interest as of December 31, 2023 $ 209,420 Deconsolidated funds (119,231) Changes in third-party seed investments in consolidated funds 18,066 Redeemable non-controlling interest as of June 30, 2024 $ 108,255
Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis	Valuation of our financial instruments by pricing observability levels as of June 30, 2024 and December 31, 2023 was as follows (in thousands): Level 1 Level 2 Level 3 NAV Expedient (1) Total June 30, 2024: Money markets $ 163,955 $ — $ — $ — $ 163,955 Securities segregated (U.S. Treasury Bills) — 591,569 — — 591,569 Derivatives 32 15,307 — — 15,339 Equity securities 179,045 4,695 116 30 183,886 Other investments 8,292 — — — 8,292 Total assets measured at fair value $ 351,324 $ 611,571 $ 116 $ 30 $ 963,041 Derivatives $ 556 $ 10,408 $ — $ — $ 10,964 Contingent payment arrangements — — 255,166 — 255,166 Total liabilities measured at fair value $ 556 $ 10,408 $ 255,166 $ — $ 266,130 December 31, 2023: Money markets $ 146,906 $ — $ — $ — $ 146,906 Securities segregated (U.S. Treasury Bills) — 867,679 — — 867,679 Derivatives 1 14,517 — — 14,518 Equity securities 113,833 32,104 118 1,598 147,653 Other investments 7,870 — — — 7,870 Total assets measured at fair value $ 268,610 $ 914,300 $ 118 $ 1,598 $ 1,184,626 Derivatives $ 3,511 $ 14,669 $ — $ — $ 18,180 Contingent payment arrangements — — 252,690 — 252,690 Total liabilities measured at fair value $ 3,511 $ 14,669 $ 252,690 $ — $ 270,870 (1) Investments measured at fair value using NAV (or its equivalent) as a practical expedient. (2) Investments in equity method investees that are not measured at fair value in accordance with GAAP. (3) Investments carried at amortized cost that are not measured at fair value in accordance with GAAP. Valuation of consolidated company-sponsored investment funds' financial instruments by pricing observability levels as of June 30, 2024 and December 31, 2023 was as follows (in thousands): Level 1 Level 2 Level 3 Total June 30, 2024: Investments - VIEs $ 16,392 $ 141,226 $ — $ 157,618 Investments - VOEs 13,785 81,667 — 95,452 Derivatives - VIEs 457 107 — 564 Total assets measured at fair value $ 30,634 $ 223,000 $ — $ 253,634 Derivatives - VIEs 99 60 — 159 Total liabilities measured at fair value $ 99 $ 60 $ — $ 159 December 31, 2023: Investments - VIEs $ 49,455 $ 237,164 $ — $ 286,619 Investments - VOEs 9,036 101,519 — 110,555 Derivatives - VIEs 2,139 2,763 — 4,902 Derivatives - VOEs — 8,775 — 8,775 Total assets measured at fair value $ 60,630 $ 350,221 $ — $ 410,851 Derivatives - VIEs $ 944 $ 1,587 $ — $ 2,531 Total liabilities measured at fair value $ 944 $ 1,587 $ — $ 2,531
Schedule of Offsetting of Derivative Assets	Offsetting of assets as of June 30, 2024 and December 31, 2023 was as follows: Gross Amounts of Recognized Assets Gross Amounts Offset in the Statement of Financial Condition Net Amounts of Assets Presented in the Statement of Financial Condition Financial Cash Collateral Net (in thousands) June 30, 2024: Securities borrowed $ 20,528 $ — $ 20,528 $ (20,501) $ — $ 27 Derivatives $ 15,339 $ — $ 15,339 $ — $ (7,419) $ 7,920 December 31, 2023: Securities borrowed $ 23,229 $ — $ 23,229 $ (23,229) $ — $ — Derivatives $ 14,518 $ — $ 14,518 $ — $ (5,691) $ 8,827 Offsetting of derivative assets of consolidated company-sponsored investment funds as of June 30, 2024 and December 31, 2023 was as follows: Gross Amounts of Recognized Assets Gross Amounts Offset in the Statement of Financial Condition Net Amounts of Assets Presented in the Statement of Financial Condition Financial Cash Collateral Net (in thousands) June 30, 2024: Derivatives - VIEs $ 564 $ — $ 564 $ — $ (564) $ — December 31, 2023: Derivatives - VIEs $ 4,902 $ — $ 4,902 $ — $ (1,415) $ 3,487
Schedule of Offsetting of Derivative Liabilities	Offsetting of liabilities as of June 30, 2024 and December 31, 2023 was as follows: Gross Amounts of Recognized Liabilities Gross Amounts Offset in the Statement of Financial Condition Net Amounts of Liabilities Presented in the Statement of Financial Condition Financial Cash Collateral Net Amount (in thousands) June 30, 2024: Derivatives $ 10,964 $ — $ 10,964 $ — $ (4,059) $ 6,905 December 31, 2023: Securities loaned $ 125,101 $ — $ 125,101 $ (122,369) $ — $ 2,732 Derivatives $ 18,180 $ — $ 18,180 $ — $ (7,795) $ 10,385 Offsetting of derivative liabilities of consolidated company-sponsored investment funds as of June 30, 2024 and December 31, 2023 was as follows: Gross Amounts of Recognized Liabilities Gross Amounts Offset in the Statement of Financial Condition Net Amounts of Liabilities Presented in the Statement of Financial Condition Financial Cash Collateral Net Amount (in thousands) June 30, 2024: Derivatives - VIEs $ 159 $ — $ 159 $ — $ (159) $ — December 31, 2023: Derivatives - VIEs $ 2,531 $ — $ 2,531 $ — $ (1,408) $ 1,123

Units Outstanding (Tables)

Units Outstanding (Tables)	6 Months Ended
	Jun. 30, 2024
Equity [Abstract]
Schedule of Changes in Units Outstanding	Changes in AB Units outstanding during the six-month period ended June 30, 2024 were as follows: Outstanding as of December 31, 2023 286,609,212 Units issued 850,482 Units retired (1) (685,921) Outstanding as of June 30, 2024 286,773,773 (1) During the six months ended June 30, 2024, we purchased 18,800 AB Units in private transactions and retired them.

Divestiture (Tables)

Divestiture (Tables)	6 Months Ended
	Jun. 30, 2024
Discontinued Operations and Disposal Groups [Abstract]
Schedule of Assets and Liabilities Included in Sale of Business	The net carrying amount of the BRS business assets and liabilities included in the sale was $312.1 million and consisted of the following: April 1, 2024 (in thousands) Cash and cash equivalents $ 338,226 Receivables, net: Brokers and dealers 31,427 Brokerage clients 2,817 Other fees 14,719 Investments 9,555 Furniture and equipment, net 5,472 Other assets 44,751 Right-of-use assets 4,422 Intangible assets 3,850 Goodwill 159,826 Total assets sold $ 615,065 Payables: Brokers and dealers $ 15,271 Brokerage clients 14,110 AP and Accrued Expenses 134,979 Other liabilities 10,370 Accrued compensation and benefits 42,069 Debt 86,200 Total liabilities sold $ 302,999 The following table summarizes the assets and liabilities of the disposal group classified as held for sale on the condensed consolidated statement of financial condition as of December 31, 2023: December 31, 2023 (in thousands) Cash and cash equivalents $ 153,047 Receivables, net: Brokers and dealers 32,669 Brokerage clients 74,351 Other fees 15,326 Investments 17,029 Furniture and equipment, net 5,807 Other assets 104,228 Right-of-use assets 5,032 Intangible assets 4,061 Goodwill 159,826 Valuation adjustment (allowance) on disposal group (6,600) Total assets held for sale $ 564,776 Payables: Brokers and dealers $ 39,359 Brokerage clients 16,885 Other liabilities 67,938 Accrued compensation and benefits 29,160 Total liabilities held for sale $ 153,342
Schedule of Pre-Tax Gain from Divestiture	As a result of the sale, we recognized a pre-tax gain of $134.6 million during the second quarter of 2024, calculated as follows: April 1, 2024 (in thousands) Cash proceeds $ 303,980 Fair value of equity interest in the JVs 283,871 Net carrying amount of assets and liabilities divested (312,066) Consideration for future put option to be exercised by AB (102,550) Cumulative translation losses (10,197) Reorganization costs (28,483) Pre-tax gain on divestiture $ 134,555
Schedule of Business Divestiture under Cash Flows Investing Activities	The following table summarizes the different components of the initial business divestiture presented under cash flows from investing activities: June 30, 2024 (in thousands) Cash proceeds from buyer $ 303,980 Initial cash contributed to joint ventures from transferring balance sheet (338,226) Direct costs to sell (5,950) Cash outflow from divestiture (40,196)

Business Description Organiza_4

Business Description Organization and Basis of Presentation - Additional Information (Details)	6 Months Ended
	Jun. 30, 2024 shares
General partnership information [Abstract]
General Partnership number of general partnership units owned in Holding Company (in shares)	100,000
AXA and its subsidiaries economic interest in Company	61.10%
AB Holding | Equitable Holdings, Inc. And Subsidiaries
General partnership information [Abstract]
General partnership interest in company (percent)	3.50%
AB Holding | AB
General partnership information [Abstract]
General partnership interest in company (percent)	1%

Business Description and Organi

Business Description and Organization - Summary of Ownership Structure (Details)	6 Months Ended
	Jun. 30, 2024
AB
Ownership structure of AllianceBernstein expressed as a percentage of general and limited partnership interests [Abstract]
Limited partners or members ownership interest in company (percent)	100%
EQH and its subsidiaries
Ownership structure of AllianceBernstein expressed as a percentage of general and limited partnership interests [Abstract]
Limited partners or members ownership interest in company (percent)	59.70%
AB Holding
Ownership structure of AllianceBernstein expressed as a percentage of general and limited partnership interests [Abstract]
Limited partners or members ownership interest in company (percent)	39.60%
Unaffiliated holders
Ownership structure of AllianceBernstein expressed as a percentage of general and limited partnership interests [Abstract]
Limited partners or members ownership interest in company (percent)	0.70%

Significant Accounting Polici_2

Significant Accounting Policies (Details) $ in Thousands	Apr. 01, 2024 director	Jun. 30, 2024 USD ($) investment	Dec. 31, 2023 USD ($) investment	Nov. 22, 2022
Business Acquisition [Line Items]
Investments owned | $		$ 524,772	$ 243,554
Investment in joint ventures
Business Acquisition [Line Items]
Number of joint venture investments | investment		2	2
Investment in joint ventures | AB Holding
Business Acquisition [Line Items]
Number of independent directors	4
Number of directors	4
Investment in joint ventures | Societe Generale
Business Acquisition [Line Items]
Interest in the joint venture				51%
Joint Venture, North America
Business Acquisition [Line Items]
Interest in the joint venture	66.70%	66.70%
Investments owned | $		$ 295,400
Number of independent directors	2
Joint Venture, International
Business Acquisition [Line Items]
Interest in the joint venture		49%
Joint Venture, International | Societe Generale
Business Acquisition [Line Items]
Interest in the joint venture	51%
Number of independent directors	3

Revenue Recognition (Details)

Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Disaggregation of Revenue [Line Items]
Revenue subject to contracts with customers	$ 1,016,225	$ 982,926	$ 2,088,025	$ 1,978,933
Not subject to contracts with customers:
Dividend and interest income, net of broker-dealer related interest expense	22,173	24,744	42,971	47,402
Investment (losses) gains	(23,629)	670	(11,886)	5,934
Other revenues	13,174	116	12,984	278
Total revenue not from contract with customer	11,718	25,530	44,069	53,614
Net revenues	1,027,943	1,008,456	2,132,094	2,032,547
Base fees
Disaggregation of Revenue [Line Items]
Revenue subject to contracts with customers	774,017	703,371	1,528,256	1,395,699
Performance-based fees
Disaggregation of Revenue [Line Items]
Revenue subject to contracts with customers	43,310	18,307	73,476	54,886
Bernstein research services(1)
Disaggregation of Revenue [Line Items]
Revenue subject to contracts with customers	0	91,847	96,222	191,885
All-in-management fees
Disaggregation of Revenue [Line Items]
Revenue subject to contracts with customers	81,680	70,849	160,104	139,637
12b-1 fees
Disaggregation of Revenue [Line Items]
Revenue subject to contracts with customers	16,569	15,778	33,174	30,933
Other distribution fees
Disaggregation of Revenue [Line Items]
Revenue subject to contracts with customers	74,656	58,171	145,317	115,306
Shareholder servicing fees
Disaggregation of Revenue [Line Items]
Revenue subject to contracts with customers	22,356	20,801	44,019	41,094
Other
Disaggregation of Revenue [Line Items]
Revenue subject to contracts with customers	$ 3,637	$ 3,802	$ 7,457	$ 9,493

Long-term Incentive Compensat_3

Long-term Incentive Compensation Plans - Schedule of Share-based Compensation, Employee Stock Purchase Plan, Activity (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Share-Based Payment Arrangement [Abstract]
Total amount of AB Holding Units Purchased (in shares)	0.9	0	1	0.5
Total Cash Paid for AB Holding Units Purchased	$ 29	$ 0	$ 33.3	$ 18.8
Open Market Purchases of AB Holding Units Purchased (in shares)	0.6	0	0.6	0
Total Cash Paid for Open Market Purchases of AB Holding Units	$ 21.5	$ 0	$ 21.5	$ 0

Long-term Incentive Compensat_4

Long-term Incentive Compensation Plans - Additional Information (Details) - shares shares in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
AB Holding Units
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Units granted to employees and eligible directors (in shares)	1.2	0.4

Net Income per Unit (Details)

Net Income per Unit (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Limited partners interest in company (as a percent)			99%
Net income per unit, basic and diluted [Abstract]
Net income attributable to AB Unitholders	$ 309,572	$ 175,737	$ 527,499	$ 369,888
Weighted average limited partnership units outstanding – basic (in shares)	287,192,000	285,670,000	287,034,000	285,698,000
Weighted average limited partnership units outstanding – diluted (in shares)	287,192,000	285,670,000	287,034,000	285,698,000
Basic net income per AB Unit (in dollars per share)	$ 1.07	$ 0.61	$ 1.82	$ 1.28
Diluted net income per AB Unit (in dollars per share)	$ 1.07	$ 0.61	$ 1.82	$ 1.28
Anti-dilutive options excluded from diluted net income (in shares)	0	0	0	0
AB Holding | AB
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
General partnership interest in company (percent)			1%

Cash Distributions (Details)

Cash Distributions (Details) - $ / shares		6 Months Ended
	Jul. 26, 2024	Jun. 30, 2024
General Partner Interest
Distribution Made to Limited Partner [Line Items]
General partnership interest in company (percent)		1%
General Partner Interest | Cash Distribution
Distribution Made to Limited Partner [Line Items]
General partnership interest in company (percent)		1%
Subsequent Event
Distribution Made to Limited Partner [Line Items]
Distribution declared (in dollars per share)	$ 0.79

Cash and Securities Segregate_2

Cash and Securities Segregated Under Federal Regulations and Other Requirements (Details) - USD ($) $ in Billions	Jun. 30, 2024	Dec. 31, 2023
Broker-Dealer [Abstract]
United states treasury bills in special reserve bank custody account for exclusive benefit of brokerage customers	$ 0.6	$ 0.9

Investments - Summary of Invest

Investments - Summary of Investments (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Summary of Investment Holdings [Line Items]
Investments owned	$ 524,772	$ 243,554
Equity securities
Summary of Investment Holdings [Line Items]
Investments owned	42	0
Time deposits
Summary of Investment Holdings [Line Items]
Investments owned	6,165	6,517
Other
Summary of Investment Holdings [Line Items]
Investments owned	10,946	10,609
Long-term incentive compensation-related | Equity securities
Summary of Investment Holdings [Line Items]
Investments owned	25,321	18,882
Long-term incentive compensation-related | Investments in limited partnership hedge funds
Summary of Investment Holdings [Line Items]
Investments owned	10,267	21,151
Seed capital
Summary of Investment Holdings [Line Items]
Investments owned	327,100	394,200
Seed capital | Equity securities
Summary of Investment Holdings [Line Items]
Investments owned	158,523	128,771
Seed capital | Investments in limited partnership hedge funds
Summary of Investment Holdings [Line Items]
Investments owned	18,129	57,624
Investment in joint ventures
Summary of Investment Holdings [Line Items]
Investments owned	$ 295,379	$ 0

Investments - Additional Inform

Investments - Additional Information (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Summary of Investment Holdings [Line Items]
Long-term incentive compensation-related	$ 35,600	$ 40,000
Investments owned	524,772	243,554
Seed capital
Summary of Investment Holdings [Line Items]
Investments owned	$ 327,100	$ 394,200

Investments - Unrealized Gains

Investments - Unrealized Gains Related to Equity Securities (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Investments, Debt and Equity Securities [Abstract]
Net gains recognized during the period	$ 986	$ 2,983	$ 12,044	$ 8,447
Less: net (losses) gains recognized during the period on equity securities sold during the period	(1,362)	5,259	6,027	5,849
Unrealized gains (losses) recognized during the period on equity securities held	$ 2,348	$ (2,276)	$ 6,017	$ 2,598

Derivative Instruments - Schedu

Derivative Instruments - Schedule of Notional Value and Fair Value of Derivative Instruments (Details) - Not Designated as Hedging Instrument - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Derivative [Line Items]
Notional Value	$ 348,983	$ 446,989
Derivative Assets	15,339	14,518
Derivative Liabilities	10,964	18,180
Exchange-traded futures
Derivative [Line Items]
Notional Value	109,749	116,344
Derivative Assets	32	1
Derivative Liabilities	556	3,511
Currency forwards
Derivative [Line Items]
Notional Value	10,123	34,440
Derivative Assets	5,022	4,951
Derivative Liabilities	5,027	5,597
Interest rate swaps
Derivative [Line Items]
Notional Value	38,185	11,345
Derivative Assets	657	294
Derivative Liabilities	516	349
Credit default swaps
Derivative [Line Items]
Notional Value	49,503	139,607
Derivative Assets	9,153	9,265
Derivative Liabilities	2,996	4,197
Total return swaps
Derivative [Line Items]
Notional Value	91,378	95,021
Derivative Assets	475	6
Derivative Liabilities	1,661	4,391
Option swaps
Derivative [Line Items]
Notional Value	50,045	50,232
Derivative Assets	0	1
Derivative Liabilities	$ 208	$ 135

Derivative Instruments - Sche_2

Derivative Instruments - Schedule of Gains and Losses for Derivative Instruments Recognized in Investment Gains (Losses) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Derivative [Line Items]
Gains (losses) on derivative instruments	$ (1,630)	$ (861)	$ (6,580)	$ (11,355)
Exchange-traded futures
Derivative [Line Items]
Gains (losses) on derivative instruments	(871)	2,032	(2,450)	(2,600)
Currency forwards
Derivative [Line Items]
Gains (losses) on derivative instruments	(9)	68	355	(37)
Interest rate swaps
Derivative [Line Items]
Gains (losses) on derivative instruments	282	114	425	51
Credit default swaps
Derivative [Line Items]
Gains (losses) on derivative instruments	(91)	(2,013)	(920)	(4,241)
Total return swaps
Derivative [Line Items]
Gains (losses) on derivative instruments	(682)	(1,645)	(3,938)	(3,701)
Option swaps
Derivative [Line Items]
Gains (losses) on derivative instruments	$ (259)	$ 583	$ (52)	$ (827)

Derivative Instruments - Additi

Derivative Instruments - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2024	Jun. 30, 2023	Jun. 30, 2023	Jun. 30, 2024	Dec. 31, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Cash collateral payable to trade counterparties				$ 7.4	$ 5.7
Cash collateral received				$ 4.1	$ 7.8
Losses on equity options activity	$ 2	$ 0.8	$ 3.7

Offsetting Assets and Liabili_3

Offsetting Assets and Liabilities - Offsetting Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Securities borrowed
Gross Amounts of Recognized Assets	$ 20,528	$ 23,229
Gross Amounts Offset in the Statement of Financial Condition	0	0
Net Amounts of Assets Presented in the Statement of Financial Condition	20,528	23,229
Financial Instruments Collateral	(20,501)	(23,229)
Cash Collateral Received	0	0
Net Amount	27	0
Derivatives
Cash Collateral Received	(7,400)	(5,700)
Derivatives
Derivatives
Gross Amounts of Recognized Assets	15,339	14,518
Gross Amounts Offset in the Statement of Financial Condition	0	0
Net Amounts of Assets Presented in the Statement of Financial Condition	15,339	14,518
Financial Instruments Collateral	0	0
Cash Collateral Received	(7,419)	(5,691)
Net Amount	$ 7,920	$ 8,827

Offsetting Assets and Liabili_4

Offsetting Assets and Liabilities - Offsetting Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Securities loaned
Gross Amounts of Recognized Liabilities		$ 125,101
Gross Amounts Offset in the Statement of Financial Condition		0
Net Amounts of Liabilities Presented in the Statement of Financial Condition		125,101
Financial Instruments Collateral		(122,369)
Cash Collateral Pledged		0
Net Amount		2,732
Derivatives
Cash Collateral Pledged	$ (4,100)	(7,800)
Derivatives
Derivatives
Gross Amounts of Recognized Liabilities	10,964	18,180
Gross Amounts Offset in the Statement of Financial Condition	0	0
Net Amounts of Liabilities Presented in the Statement of Financial Condition	10,964	18,180
Financial Instruments Collateral	0	0
Cash Collateral Pledged	(4,059)	(7,795)
Net Amount	$ 6,905	$ 10,385

Fair Value - Valuation of Finan

Fair Value - Valuation of Financial Instruments by Pricing Observability Levels (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Assets, Fair Value Disclosure [Abstract]
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Brokers and dealers	Brokers and dealers
Investments:
Contingent consideration liability	$ 255,166	$ 252,690
Recurring
Assets, Fair Value Disclosure [Abstract]
Money markets	163,955	146,906
Securities segregated (U.S. Treasury Bills)	591,569	867,679
Derivatives	15,339	14,518
Investments:
Total assets measured at fair value	963,041	1,184,626
Derivatives	10,964	18,180
Contingent consideration liability	255,166	252,690
Total liabilities measured at fair value	266,130	270,870
Recurring | Equity securities
Investments:
Equity securities	183,886	147,653
Recurring | Other investments
Investments:
Total investments measured at fair value and other measurements	8,292	7,870
Level 1 | Other investments
Investments:
Total investments	8,300	7,900
Level 1 | Recurring
Assets, Fair Value Disclosure [Abstract]
Money markets	163,955	146,906
Derivatives	32	1
Investments:
Total assets measured at fair value	351,324	268,610
Derivatives	556	3,511
Total liabilities measured at fair value	556	3,511
Level 1 | Recurring | Equity securities
Investments:
Equity securities	179,045	113,833
Level 1 | Recurring | Other investments
Investments:
Total investments	8,292	7,870
Level 2 | Recurring
Assets, Fair Value Disclosure [Abstract]
Securities segregated (U.S. Treasury Bills)	591,569	867,679
Derivatives	15,307	14,517
Investments:
Total assets measured at fair value	611,571	914,300
Derivatives	10,408	14,669
Total liabilities measured at fair value	10,408	14,669
Level 2 | Recurring | Equity securities
Investments:
Equity securities	4,695	32,104
Level 3 | Recurring
Investments:
Total assets measured at fair value	116	118
Contingent consideration liability	255,166	252,690
Total liabilities measured at fair value	255,166	252,690
Level 3 | Recurring | Equity securities
Investments:
Equity securities	116	118
NAV Expedient | Recurring
Investments:
Total assets measured at fair value	30	1,598
NAV Expedient | Recurring | Equity securities
Investments:
Equity securities	$ 30	$ 1,598

Fair Value - Additional Informa

Fair Value - Additional Information (Details)	Jun. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)	Jun. 30, 2023
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value assets level 2 to level 3 transfers amount	$ 0
Revenue growth rate | Minimum | CarVal
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Acquisition-related contingent liability (as percent)	0.020		0.020
Revenue growth rate | Maximum | CarVal
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Acquisition-related contingent liability (as percent)	0.293		0.839
Revenue growth rate | Weighted Average | CarVal
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Acquisition-related contingent liability (as percent)	0.079		0.103
Discount rate | Minimum | CarVal
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Acquisition-related contingent liability (as percent)	0.019		0.019
Discount rate | Maximum | CarVal
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Acquisition-related contingent liability (as percent)	0.104		0.104
Discount rate | Weighted Average | CarVal
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Acquisition-related contingent liability (as percent)	0.046		0.046
Level 1 | Other
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total investments	$ 8,300,000	$ 7,900,000

Fair Value - Change in Carrying

Fair Value - Change in Carrying Value of Level 3 Financial Instruments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Fair value measurement Level 3 reconciliation [Abstract]
Balance as of beginning of period	$ 114	$ 170	$ 118	$ 129
Unrealized gains (losses), net	2	(49)	(2)	(8)
Balance as of end of period	$ 116	$ 121	$ 116	$ 121

Fair Value - Change in Carryi_2

Fair Value - Change in Carrying Value Associated with Contingent Payment Arrangements Level 3 Instruments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Fair Value, Liabilities Measurement Level 3 reconciliation
Balance as of beginning of period	$ 254,108	$ 248,185	$ 252,690	$ 247,309
Accretion	2,558	2,444	5,116	4,887
Payments	(1,500)	0	(2,640)	(792)
Held for sale reclassification	0	(775)	0	(1,550)
Balance as of end of period	$ 255,166	$ 249,854	$ 255,166	$ 249,854

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Details) $ in Millions	Dec. 14, 2022 plaintiff	Apr. 01, 2024 USD ($)
Commitments And Contingencies Disclosure [Line Items]
Number of participants that filed a class action complaint | plaintiff	4
Societe Generale Canada | AB Holding
Commitments And Contingencies Disclosure [Line Items]
Percentage guarantee of unpaid debt obligation		66.70%
Investment in joint ventures | AB Holding
Commitments And Contingencies Disclosure [Line Items]
Percentage guarantee of unpaid debt obligation		66.70%
Investment in joint ventures | Societe Generale
Commitments And Contingencies Disclosure [Line Items]
Line of credit facility, maximum borrowing capacity | $		$ 60
Milestone equity method investment percentage related to guaranteed debt obligation		50%

Leases - Additional Information

Leases - Additional Information (Details) ft² in Thousands	6 Months Ended
	Jun. 30, 2024 ft²
Lessee, Lease, Description [Line Items]
Operating and finance lease, maximum term of extension option	5 years
Operating and finance lease, term of termination option	1 year
New York City
Lessee, Lease, Description [Line Items]
Area of space leased (in square feet)	166
Minimum
Lessee, Lease, Description [Line Items]
Operating and finance lease, remaining contract term	1 year
Maximum
Lessee, Lease, Description [Line Items]
Operating and finance lease, remaining contract term	20 years

Leases - Schedule of Leases (De

Leases - Schedule of Leases (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Operating Leases
Operating lease right-of-use assets	$ 481,336	$ 312,588
Operating lease liabilities	$ 546,961	$ 357,623
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Right-of-use assets	Right-of-use assets
Operating Lease, Liability, Statement of Financial Position [Extensible List]	Lease liabilities	Lease liabilities
Finance Leases
Property and equipment, gross	$ 18,725	$ 18,975
Amortization of right-of-use assets	(9,651)	(7,797)
Property and equipment, net	9,074	11,178
Finance lease liabilities	$ 9,031	$ 11,394
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Right-of-use assets	Right-of-use assets
Finance Lease, Liability, Statement of Financial Position [Extensible List]	Lease liabilities	Lease liabilities

Leases - Schedule of Components

Leases - Schedule of Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Leases [Abstract]
Operating lease cost	$ 27,584	$ 24,120	$ 55,520	$ 47,284
Financing lease cost:
Amortization of right-of-use assets	1,047	1,203	2,099	2,279
Interest on lease liabilities	76	88	160	153
Total finance lease cost	1,123	1,291	2,259	2,432
Variable lease cost	10,280	7,432	19,890	16,299
Sublease income	(8,746)	(8,741)	(16,469)	(17,001)
Net lease cost	$ 30,241	$ 24,102	$ 61,200	$ 49,014

Leases - Schedule of Maturities

Leases - Schedule of Maturities of Lease Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Operating Leases
2024 (excluding the six months ended June 30, 2024)	$ 52,076
2025	61,864
2026	60,648
2027	58,144
2028	52,050
Thereafter	464,114
Total lease payments	748,896
Less interest	(201,935)
Present value of lease liabilities	546,961	$ 357,623
Financing Leases
2024 (excluding the six months ended June 30, 2024)	1,927
2025	4,050
2026	2,617
2027	922
2028	142
Thereafter	0
Total lease payments	9,658
Less interest	(627)
Present value of lease liabilities	9,031	$ 11,394
Total
2024 (excluding the six months ended June 30, 2024)	54,003
2025	65,914
2026	63,265
2027	59,066
2028	52,192
Thereafter	464,114
Total lease payments	$ 758,554

Leases - Schedule of Lease Term

Leases - Schedule of Lease Term and Discount Rate (Details)	Jun. 30, 2024
Weighted average remaining lease term (years):
Operating leases	13 years 10 days
Finance leases	2 years 6 months 18 days
Weighted average discount rate:
Operating leases (as percent)	4.30%
Finance leases (as percent)	3.40%

Leases - Schedule of Supplement

Leases - Schedule of Supplemental Cash Flow (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	$ 213,235	$ 28,827
Finance leases	$ 0	$ 2,096

Consolidated Company-Sponsore_3

Consolidated Company-Sponsored Investment Funds - Summary of Balance Sheet Amounts (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2023
Condensed Balance Sheet Statements, Captions [Line Items]
Total assets	$ 9,100,970	$ 9,609,806
Liabilities	4,508,018	4,947,024
Redeemable non-controlling interest	108,255	209,420
Partners' capital attributable to AB Unitholders	4,484,697	4,453,362	$ 4,416,962
Total liabilities, redeemable non-controlling interest and partners' capital	9,100,970	9,609,806
Company-Sponsored Investment Funds
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and cash equivalents	3,857	7,739
Investments	253,070	397,174
Other assets	3,676	25,299
Total assets	260,603	430,212
Liabilities	1,453	12,537
Redeemable non-controlling interest	108,255	209,420
Partners' capital attributable to AB Unitholders	150,895	208,255
Total liabilities, redeemable non-controlling interest and partners' capital	260,603	430,212
VIEs
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and cash equivalents	3,733	7,572
Investments	157,618	286,619
Other assets	2,544	15,010
Total assets	163,895	309,201
Liabilities	1,142	9,699
Redeemable non-controlling interest	92,498	202,882
Partners' capital attributable to AB Unitholders	70,255	96,620
Total liabilities, redeemable non-controlling interest and partners' capital	163,895	309,201
VOEs
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and cash equivalents	124	167
Investments	95,452	110,555
Other assets	1,132	10,289
Total assets	96,708	121,011
Liabilities	311	2,838
Redeemable non-controlling interest	15,757	6,538
Partners' capital attributable to AB Unitholders	80,640	111,635
Total liabilities, redeemable non-controlling interest and partners' capital	$ 96,708	$ 121,011

Consolidated Company-Sponsore_4

Consolidated Company-Sponsored Investment Funds - Additional Information (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($) fund	Jun. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)
Derivative [Line Items]
Gains (losses) on derivative instruments	$ (1,630,000)	$ (861,000)	$ (6,580,000)	$ (11,355,000)
Cash collateral payable to trade counterparties	7,400,000		7,400,000		$ 5,700,000
Cash collateral received	4,100,000		4,100,000		7,800,000
Maximum risk of loss in investment in VIEs					10,300,000
Advisory fee receivables	124,925,000		124,925,000		125,500,000
VIEs
Derivative [Line Items]
Futures, forwards and swaps held	400,000		400,000		2,400,000
Gains (losses) on derivative instruments	(500,000)	$ (1,300,000)	(900,000)	400,000
Cash collateral payable to trade counterparties, gross	800,000		800,000		1,400,000
Cash collateral received, gross	1,300,000		1,300,000		1,400,000
Cash collateral payable to trade counterparties	564,000		564,000		1,415,000
Cash collateral received	159,000		159,000		1,408,000
VOEs
Derivative [Line Items]
Futures, forwards and swaps held	0		0		8,800,000
Gains (losses) on derivative instruments			0	$ 0
Cash collateral payable to trade counterparties	0		0
Cash collateral received	0		0
Non-consolidated VIEs
Derivative [Line Items]
Net assets	67,000,000,000		67,000,000,000		54,600,000,000
Maximum risk of loss in investment in VIEs	14,300,000		14,300,000
Advisory fee receivables	$ 103,700,000		$ 103,700,000		114,500,000
Seed capital
Derivative [Line Items]
Number of deconsolidated funds | fund			4
Seed investment, deconsolidated amount					$ 46,500,000

Consolidated Company-Sponsore_5

Consolidated Company-Sponsored Investment Funds - Redeemable Noncontrolling Interest (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2024 USD ($)
Redeemable Noncontrolling Interest [Roll Forward]
Redeemable non-controlling interest as of December 31, 2023	$ 209,420
Deconsolidated funds	(119,231)
Changes in third-party seed investments in consolidated funds	18,066
Redeemable non-controlling interest as of June 30, 2024	$ 108,255

Consolidated Company-Sponsore_6

Consolidated Company-Sponsored Investment Funds - Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives - VIEs	$ 15,339	$ 14,518
Derivatives	10,964	18,180
Total liabilities measured at fair value	266,130	270,870
Level 1 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives - VIEs	32	1
Total assets measured at fair value	351,324	268,610
Derivatives	556	3,511
Total liabilities measured at fair value	556	3,511
Level 2 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives - VIEs	15,307	14,517
Total assets measured at fair value	611,571	914,300
Derivatives	10,408	14,669
Total liabilities measured at fair value	10,408	14,669
Level 3 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	116	118
Total liabilities measured at fair value	255,166	252,690
Company-Sponsored Investment Funds | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	253,634	410,851
Total liabilities measured at fair value	159	2,531
Company-Sponsored Investment Funds | Level 1 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	30,634	60,630
Total liabilities measured at fair value	99	944
Company-Sponsored Investment Funds | Level 2 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	223,000	350,221
Total liabilities measured at fair value	60	1,587
Company-Sponsored Investment Funds | Level 3 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	0	0
Total liabilities measured at fair value	0	0
VIEs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives - VIEs	564	4,902
Derivatives	159	2,531
VIEs | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments - VIEs	157,618	286,619
Derivatives - VIEs	564	4,902
Derivatives	159	2,531
VIEs | Level 1 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments - VIEs	16,392	49,455
Derivatives - VIEs	457	2,139
Derivatives	99	944
VIEs | Level 2 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments - VIEs	141,226	237,164
Derivatives - VIEs	107	2,763
Derivatives	60	1,587
VIEs | Level 3 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments - VIEs	0	0
Derivatives - VIEs	0	0
Derivatives	0	0
VOEs | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments - VIEs	95,452	110,555
Derivatives - VIEs		8,775
VOEs | Level 1 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments - VIEs	13,785	9,036
Derivatives - VIEs		0
VOEs | Level 2 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments - VIEs	81,667	101,519
Derivatives - VIEs		8,775
VOEs | Level 3 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments - VIEs	$ 0	0
Derivatives - VIEs		$ 0

Consolidated Company-Sponsore_7

Consolidated Company-Sponsored Investment Funds - Offsetting of Derivative Assets and Liabilities (Details) - USD ($)	Jun. 30, 2024	Dec. 31, 2023
Derivatives
Cash Collateral Received	$ (7,400,000)	$ (5,700,000)
Derivatives
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Broker-Dealer, Payable to Other Broker-Dealer and Clearing Organization	Broker-Dealer, Payable to Other Broker-Dealer and Clearing Organization
Cash Collateral Pledged	$ (4,100,000)	$ (7,800,000)
VIEs
Derivatives
Gross Amounts of Recognized Assets	564,000	4,902,000
Gross Amounts Offset in the Statement of Financial Condition	0	0
Net Amounts of Assets Presented in the Statement of Financial Condition	564,000	4,902,000
Financial Instruments Collateral	0	0
Cash Collateral Received	(564,000)	(1,415,000)
Net Amount	0	3,487,000
Derivatives
Gross Amounts of Recognized Liabilities	159,000	2,531,000
Gross Amounts Offset in the Statement of Financial Condition	0	0
Net Amounts of Liabilities Presented in the Statement of Financial Condition	159,000	2,531,000
Financial Instruments Collateral	0	0
Cash Collateral Pledged	(159,000)	(1,408,000)
Net Amount	0	$ 1,123,000
VOEs
Derivatives
Cash Collateral Received	0
Derivatives
Cash Collateral Pledged	$ 0

Units Outstanding (Details)

Units Outstanding (Details)	6 Months Ended
	Jun. 30, 2024 shares
Units Outstanding
Beginning balance (in shares)	286,609,212
Units issued (in shares)	850,482
Units retired (in shares)	(685,921)
Ending balance (in shares)	286,773,773
AB units purchased and retired in private transactions (in shares)	18,800

Debt (Details)

Debt (Details)	6 Months Ended	12 Months Ended
	Jun. 30, 2024 USD ($) financialInstitution lineOfCredit	Dec. 31, 2023 USD ($)
EQH
Short-term Debt [Line Items]
Amount outstanding	$ 620,000,000	$ 900,000,000
Weighted average interest rates (as percent)	5.30%
Average daily borrowings	$ 639,100,000	$ 743,100,000
Weighted average interest rates on average daily borrowings (as percent)	5.30%	4.90%
Revolving Credit Facility | EQH
Short-term Debt [Line Items]
Line of credit facility, maximum borrowing capacity	$ 900,000,000
Revolving Credit Facility | EQH Uncommitted Facility
Short-term Debt [Line Items]
Line of credit facility, maximum borrowing capacity	300,000,000
Amount outstanding	0	$ 0
Line of Credit
Short-term Debt [Line Items]
Line of credit facility, maximum borrowing capacity	800,000,000
Maximum incremental increase	200,000,000
Amount outstanding	0	0
Proceeds from debt, net	0	$ 0
Line of Credit | Subsidiaries
Short-term Debt [Line Items]
Line of credit facility, maximum borrowing capacity	$ 315,000,000
Number of uncommitted lines of credit | lineOfCredit	5
Number of financial institutions offering lines of credit | financialInstitution	5
Number of financial institutions with stated limits | lineOfCredit	4
Equitable Holdings, Inc. And Subsidiaries
Short-term Debt [Line Items]
Weighted average interest rates on average daily borrowings (as percent)		4.60%
Short-term debt, average outstanding amount	$ 0	$ 3,600,000
Commercial Paper
Short-term Debt [Line Items]
Weighted average interest rates on average daily borrowings (as percent)	5.40%	5.20%
Short-term debt, average outstanding amount	$ 367,000,000	$ 267,600,000
Short-term debt	$ 0	$ 254,300,000
Interest rate on commercial paper outstanding (as percent)		5.40%
Uncommited Lines of Credit
Short-term Debt [Line Items]
Weighted average interest rates (as percent)	8.50%	7.80%
Short-term debt, average outstanding amount	$ 1,300,000	$ 1,100,000
Short-term debt	$ 0	$ 0

Divestiture - Additional Inform

Divestiture - Additional Information (Details) $ in Thousands			3 Months Ended	6 Months Ended	12 Months Ended
	Apr. 01, 2024 USD ($) director	Nov. 22, 2022	Jun. 30, 2024 USD ($) investment	Jun. 30, 2024 USD ($) investment	Dec. 31, 2023 USD ($) investment	Jul. 01, 2024 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash proceeds				$ 304,000
Discontinued Operations, Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and cash equivalents					$ 153,000
Investment in joint ventures
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Interest in the joint venture hold		49%
Number of joint venture investments | investment			2	2	2
Cash proceeds	$ 304,000
Investment in joint ventures | Discontinued Operations, Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Valuation adjustment, expense on disposal group					$ 6,600
Investment in joint ventures | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash proceeds			$ 303,980	$ 303,980
Disposal Group, Including Discontinued Operation, Net Assets (Liabilities)			312,066	312,066		$ 312,100
Fair value of equity interest in the JVs			283,871	283,871
Consideration for future put option to be exercised			$ 102,550
Cash and cash equivalents	$ 338,226
Direct costs to sell				$ 12,400
Investment in joint ventures | AB Holding
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of independent directors | director	4
Investment in joint ventures | Societe Generale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Interest in the joint venture		51%
Option to acquire controlling interest in joint venture, term	5 years	5 years
Interest in the joint venture, with an option	100%	100%
Investment in joint ventures | Societe Generale | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Interest in the joint venture	51%
Joint Venture, North America
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Interest in the joint venture	66.70%		66.70%	66.70%
Number of independent directors | director	2
Joint Venture, International
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Interest in the joint venture			49%	49%
Joint Venture, International | Societe Generale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Interest in the joint venture	51%
Number of independent directors | director	3

Divestiture - Summarizes the As

Divestiture - Summarizes the Assets and Liabilities of the Disposal Group Classified (Details) - USD ($) $ in Thousands	Jul. 01, 2024	Jun. 30, 2024	Apr. 01, 2024	Mar. 31, 2024	Dec. 31, 2023
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total assets sold		$ 0			$ 564,776
Total liabilities sold		0			153,342
Disposal Group, Held-for-Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and cash equivalents				$ 69,100	153,047
Investments					17,029
Furniture and equipment, net					5,807
Other assets					104,228
Right-of-use assets					5,032
Intangible assets					4,061
Goodwill					159,826
Valuation adjustment (allowance) on disposal group					(6,600)
Total assets sold					564,776
Brokers and dealers					39,359
Brokerage clients					16,885
Other liabilities					67,938
Accrued compensation and benefits					29,160
Total liabilities sold					153,342
Disposal Group, Held-for-Sale, Not Discontinued Operations | Brokers and dealers
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Receivables, net:					32,669
Disposal Group, Held-for-Sale, Not Discontinued Operations | Brokerage clients
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Receivables, net:					74,351
Disposal Group, Held-for-Sale, Not Discontinued Operations | Other fees
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Receivables, net:					$ 15,326
Investment in joint ventures | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and cash equivalents			$ 338,226
Investments			9,555
Furniture and equipment, net			5,472
Other assets			44,751
Right-of-use assets			4,422
Intangible assets			3,850
Goodwill			159,826
Total assets sold			615,065
Brokers and dealers			15,271
Brokerage clients			14,110
AP and Accrued Expenses			134,979
Other liabilities			10,370
Accrued compensation and benefits			42,069
Debt			86,200
Total liabilities sold			302,999
Disposal Group, Including Discontinued Operation, Net Assets (Liabilities)	$ 312,100	$ 312,066
Investment in joint ventures | Disposal Group, Disposed of by Sale, Not Discontinued Operations | Brokers and dealers
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Receivables, net:			31,427
Investment in joint ventures | Disposal Group, Disposed of by Sale, Not Discontinued Operations | Brokerage clients
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Receivables, net:			2,817
Investment in joint ventures | Disposal Group, Disposed of by Sale, Not Discontinued Operations | Other fees
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Receivables, net:			$ 14,719

Divestiture - Schedule of Pre-T

Divestiture - Schedule of Pre-Tax Gain from Divestiture (Details) - USD ($) $ in Thousands		3 Months Ended	6 Months Ended
	Apr. 01, 2024	Jun. 30, 2024	Jun. 30, 2024	Jul. 01, 2024
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash proceeds			$ 304,000
Investment in joint ventures
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash proceeds	$ 304,000
Investment in joint ventures | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash proceeds		$ 303,980	303,980
Fair value of equity interest in the JVs		283,871	283,871
Net carrying amount of assets and liabilities divested		(312,066)	(312,066)	$ (312,100)
Consideration for future put option to be exercised by AB		(102,550)
Cumulative translation losses		(10,197)
Reorganization costs		(28,483)
Pre-tax gain on divestiture		$ 134,555	$ 134,600

Divestiture - Schedule of Busin

Divestiture - Schedule of Business Divestiture under Cash Flows Investing Activities (Details) - USD ($) $ in Thousands		3 Months Ended	6 Months Ended
	Apr. 01, 2024	Jun. 30, 2024	Jun. 30, 2024	Jun. 30, 2023
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash proceeds			$ 304,000
Cash outflow from divestiture			(40,196)	$ 0
Investment in joint ventures
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash proceeds	$ 304,000
Investment in joint ventures | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash proceeds		$ 303,980	303,980
Initial cash contributed to joint ventures from transferring balance sheet			(338,226)
Direct costs to sell			(5,950)
Cash outflow from divestiture			$ (40,196)