Consolidated Statements of Changes in Partners' Capital - USD ($) $ in Thousands	Total	General Partner’s Capital	General Partner’s Capital EQH Purchase Agreement	General Partner’s Capital EQH Exchange Agreement	Limited Partners' Capital	Limited Partners' Capital EQH Purchase Agreement	Limited Partners' Capital EQH Exchange Agreement	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
Partners' capital, beginning balance at Dec. 31, 2022		$ 45,985			$ 4,648,113			$ (4,270)	$ (95,318)	$ (129,477)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 788,619	7,646			756,964						$ 743
Cash distributions to Unitholders		(8,411)			(830,860)
Long-term incentive compensation plans activity		(21)			(2,080)			727	179,724
Issuance of AB Units, net		189			18,482				(17,562)
Capital contributions from (to) AB Holding								(947)
Purchases of AB Holding Units for long-term compensation plans, net									(144,086)
Re-valuation of AB Holding Units held in rabbi trust									879
Foreign currency translation adjustment	14,033									14,033
Changes in employee benefit related items, net of tax	9,080									9,080
Distributions to non-controlling interests, net											(8,514)
Adjustment											(264)
Partners' capital, ending balance at Dec. 31, 2023	4,448,790	45,388			4,590,619			(4,490)	(76,363)	(106,364)
Balance, beginning of year at Dec. 31, 2022											12,607
Balance, end of year at Dec. 31, 2023											4,572
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total capital	4,453,362
Net income	1,193,485	11,732			1,161,515						3,940
Cash distributions to Unitholders		(9,553)			(944,912)
Long-term incentive compensation plans activity		(61)			(6,014)			1,088	216,133
Issuance of AB Units, net		513			49,908				(49,894)
Issuance of AB Units in connection with EQH Amended Exchange Agreement			$ 1,500			$ 148,500
Capital contributions from (to) AB Holding								509
Purchases of AB Holding Units for long-term compensation plans, net									(157,038)
Re-valuation of AB Holding Units held in rabbi trust									4,796
Foreign currency translation adjustment	(10,587)									(10,587)
Changes in employee benefit related items, net of tax	6,370									6,370
Distributions to non-controlling interests, net											(7,164)
Partners' capital, ending balance at Dec. 31, 2024	4,873,295	49,519			4,999,616			(2,893)	(62,366)	(110,581)
Balance, end of year at Dec. 31, 2024											1,348
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total capital	4,874,643
Net income	988,875	9,825			972,664						744
Cash distributions to Unitholders		(11,244)			(1,112,667)
Long-term incentive compensation plans activity		30			2,963			1,246	210,228
Issuance of AB Units, net		564			54,402				(54,561)
Issuance of AB Units in connection with EQH Amended Exchange Agreement				$ 8,202			$ 811,986
(Retirement) of AB Units in connection with EQH Amended Exchange Agreement		(8,202)			(811,986)
Capital contributions from (to) AB Holding								1,387
Purchases of AB Holding Units for long-term compensation plans, net									(161,708)
Re-valuation of AB Holding Units held in rabbi trust									(4,462)
Foreign currency translation adjustment	29,881									29,881
Changes in employee benefit related items, net of tax	23,311									23,311
Distributions to non-controlling interests, net											(1,095)
Partners' capital, ending balance at Dec. 31, 2025	4,835,154	$ 48,694			$ 4,916,978			$ (260)	$ (72,869)	$ (57,389)
Balance, end of year at Dec. 31, 2025											$ 997
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total capital	$ 4,836,151