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, 2024		$ (2,893)	$ (62,366)	$ (110,581)		$ 49,519	$ 4,999,616
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 221,694				$ 1,144	2,208	218,591
Cash distributions to General Partner						(3,396)	(336,231)
Long-term incentive compensation plans activity		246	7,308			(7)	(734)
Issuance of AB Units, net						71	7,006
Capital contributions (to) AB Holding		(764)
Purchases of AB Holding Units for long-term compensation plans, net			(29,475)
(Issuance) of AB Units, net			(7,232)
Revaluation of AB Holding Units held in rabbi trust			396
Foreign currency translation adjustment, net of tax	10,804			10,804
Changes in employee benefit related items, net of tax	23,362			23,362
Contributions from non-controlling interest					12
Partners' capital, ending balance at Mar. 31, 2025	4,765,448	(3,411)	(91,369)	(76,415)		48,395	4,888,248
Balance, beginning of period at Dec. 31, 2024					1,348
Balance, end of period at Mar. 31, 2025					2,504
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total capital	4,767,952
Total capital	4,836,151
Partners' capital, beginning balance at Dec. 31, 2025	4,835,154	(260)	(72,869)	(57,389)		48,694	4,916,978
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	308,636				16,822	2,955	292,530
Cash distributions to General Partner						(3,118)	(308,596)
Long-term incentive compensation plans activity		404	8,402			29	2,982
Issuance of AB Units, net						429	42,429
Capital contributions (to) AB Holding		(250)
Purchases of AB Holding Units for long-term compensation plans, net			(7,411)
(Issuance) of AB Units, net			(42,916)
Revaluation of AB Holding Units held in rabbi trust			(3,249)
Foreign currency translation adjustment, net of tax	(6,257)			(6,257)
Changes in employee benefit related items, net of tax	0
Distributions to non-controlling interests, net					(16,737)
Partners' capital, ending balance at Mar. 31, 2026	4,813,517	$ (106)	$ (118,043)	$ (63,646)		$ 48,989	$ 4,946,323
Balance, beginning of period at Dec. 31, 2025					997
Balance, end of period at Mar. 31, 2026					$ 1,082
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total capital	$ 4,814,599