Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Cash flows from operating activities:
Net income	$ 695,374	$ 890,733
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization of deferred sales commissions	62,183	40,152
Non-cash long-term incentive compensation expense	14,951	27,442
Depreciation and other amortization	65,009	69,673
Remeasurement of contingent payment arrangement	0	(128,505)
(Gain) on divestiture	0	(134,555)
Non-cash lease expense	53,053	90,913
Retirement plan loss	17,733	0
Other, net	5,119	16,963
Changes in assets and liabilities:
Decrease in securities, segregated	75,034	320,911
Decrease (increase) in receivables	46,160	(61,177)
(Increase) in deferred sales commissions	(48,793)	(110,642)
(Decrease) in payables	(172,690)	(504,165)
(Decrease) increase in accounts payable and accrued expenses	(1,268)	79,860
Increase in accrued compensation and benefits	379,409	394,899
Cash payments to relieve operating lease liabilities	(49,702)	(62,165)
Net cash provided by operating activities	948,056	1,140,051
Cash flows from investing activities:
Purchases of furniture, equipment and leasehold improvements	(27,849)	(99,930)
Divestiture of business (includes $304.0 million in cash proceeds in 2024)	0	(40,196)
Capital contribution to equity method investments	0	(39,401)
Debt repayment from equity method investments	0	86,200
Net cash (used in) investing activities	(27,849)	(93,327)
Cash flows from financing activities:
(Repayment of) debt, net	(245,000)	(654,316)
(Decrease) in overdrafts payable	0	(2)
Distributions to General Partner and Unitholders	(846,195)	(709,424)
Capital contributions from AB Holdings	807
Capital contributions to AB Holdings		(902)
Purchases of AB Holding Units for long-term incentive compensation plan awards, net	(47,240)	(73,131)
Other, net	(4,267)	(7,011)
Net cash (used in) financing activities	(1,035,555)	(1,544,251)
Effect of exchange rate changes on cash and cash equivalents	34,283	7,916
Net (decrease) in cash and cash equivalents	(81,065)	(489,611)
Cash and cash equivalents as of beginning of the period	834,033	1,160,889
Cash and cash equivalents as of end of the period	752,968	671,278
Non-cash financing activities:
Retirement of AB Units in connection with EQH Amended Exchange Agreement	(820,188)	0
Issuance of AB Units in connection with EQH Amended Exchange Agreement	820,188	0
Excluding Company-Sponsored Investment Funds
Adjustments to reconcile net income to net cash provided by operating activities:
Unrealized (gains) on investments	(16,147)	(13,901)
Equity in losses of equity method investments	32,343	35,443
Changes in assets and liabilities:
(Increase) decrease in investments	(16,928)	18,880
Decrease in other assets	2,880	26,187
(Increase) decrease in investments of consolidated company-sponsored investment funds	(16,928)	18,880
Company-Sponsored Investment Funds
Adjustments to reconcile net income to net cash provided by operating activities:
Unrealized (gains) on investments	(4,598)	(20,900)
Changes in assets and liabilities:
(Increase) decrease in investments	(208,253)	151,045
(Increase) decrease in other assets of consolidated company-sponsored investment funds	(15,142)	20,564
(Increase) decrease in investments of consolidated company-sponsored investment funds	(208,253)	151,045
Increase (decrease) in other liabilities of consolidated company-sponsored investment funds	32,329	(7,604)
Cash flows from financing activities:
Terminations of non-controlling interest in consolidated company-sponsored investment funds, net	$ 106,340
Redemptions of non-controlling interest in consolidated company-sponsored investment funds, net		$ (99,465)