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 (loss)	$ 428,982				$ 533	4,312	426,954
Cash distributions to General Partner						(5,992)	(593,043)
Long-term incentive compensation plans activity		673	10,137			(22)	(2,178)
(Retirement) issuance of AB Units, net						15	136
Capital contributions (to) from AB Holding		(201)
Purchases of AB Holding Units for long-term compensation plans, net			(43,646)
Retirement (issuance) of AB Units, net			347
Revaluation of AB Holding Units held in rabbi trust			1,092
Foreign currency translation adjustment, net of tax	36,842			36,842
Changes in employee benefit related items, net of tax	23,362			23,362
Distributions (to) non-controlling interests, net					(274)
Contributions from non-controlling interest					28
Partners' capital, ending balance at Jun. 30, 2025	4,732,083	(2,421)	(94,436)	(50,377)		47,832	4,831,485
Balance, beginning of period at Dec. 31, 2024					1,348
Balance, end of period at Jun. 30, 2025					1,635
Partners' capital, beginning balance at Mar. 31, 2025		(3,411)	(91,369)	(76,415)		48,395	4,888,248
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	207,288				(611)	2,104	208,363
Cash distributions to General Partner						(2,596)	(256,812)
Long-term incentive compensation plans activity		427	2,829			(15)	(1,444)
(Retirement) issuance of AB Units, net						(56)	(6,870)
Capital contributions (to) from AB Holding		563
Purchases of AB Holding Units for long-term compensation plans, net			(14,171)
Retirement (issuance) of AB Units, net			7,579
Revaluation of AB Holding Units held in rabbi trust			696
Foreign currency translation adjustment, net of tax	26,038			26,038
Changes in employee benefit related items, net of tax	0
Distributions (to) non-controlling interests, net					(274)
Contributions from non-controlling interest					16
Partners' capital, ending balance at Jun. 30, 2025	4,732,083	(2,421)	(94,436)	(50,377)		47,832	4,831,485
Balance, beginning of period at Mar. 31, 2025					2,504
Balance, end of period at Jun. 30, 2025					1,635
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total capital	4,733,718
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 (loss)	581,006				24,687	5,507	545,200
Cash distributions to General Partner						(5,796)	(573,393)
Long-term incentive compensation plans activity		1,042	21,605			17	1,755
(Retirement) issuance of AB Units, net						310	30,517
Other						(3)	(328)
Capital contributions (to) from AB Holding		(635)
Purchases of AB Holding Units for long-term compensation plans, net			(27,752)
Retirement (issuance) of AB Units, net			(29,436)
Revaluation of AB Holding Units held in rabbi trust			(2,659)
Foreign currency translation adjustment, net of tax	(5,768)			(5,768)
Changes in employee benefit related items, net of tax	0
Distributions (to) non-controlling interests, net					(24,590)
Contributions from non-controlling interest					15
Partners' capital, ending balance at Jun. 30, 2026	4,795,337	147	(111,111)	(63,157)		48,729	4,920,729
Balance, beginning of period at Dec. 31, 2025					997
Balance, end of period at Jun. 30, 2026					1,109
Partners' capital, beginning balance at Mar. 31, 2026		(106)	(118,043)	(63,646)		48,989	4,946,323
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	272,370				7,865	2,552	252,670
Cash distributions to General Partner						(2,678)	(264,797)
Long-term incentive compensation plans activity		638	13,203			(12)	(1,227)
(Retirement) issuance of AB Units, net						(119)	(11,912)
Other						(3)	(328)
Capital contributions (to) from AB Holding		(385)
Purchases of AB Holding Units for long-term compensation plans, net			(20,341)
Retirement (issuance) of AB Units, net			13,480
Revaluation of AB Holding Units held in rabbi trust			590
Foreign currency translation adjustment, net of tax	489			489
Changes in employee benefit related items, net of tax	0
Distributions (to) non-controlling interests, net					(7,853)
Contributions from non-controlling interest					15
Partners' capital, ending balance at Jun. 30, 2026	4,795,337	$ 147	$ (111,111)	$ (63,157)		$ 48,729	$ 4,920,729
Balance, beginning of period at Mar. 31, 2026					1,082
Balance, end of period at Jun. 30, 2026					$ 1,109
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total capital	$ 4,796,446