Condensed Statements of Changes in Partners’ Capital - USD ($) $ in Thousands	Total	AB Holding Units held by AB to fund long-term incentive compensation plans	Accumulated Other Comprehensive (Loss)	General Partner’s Capital	Limited Partners’ Capital
Balance, beginning of period at Dec. 31, 2022		$ (37,551)	$ (51,008)	$ 1,355	$ 2,160,207
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 184,986			163	184,823
Cash distributions to Unitholders				(197)	(223,482)
Retirement of AB Holding Units					(72,592)
Issuance of AB Holding Units to fund long-term incentive compensation plan awards					8,005
Change in AB Holding Units held by AB to fund long-term incentive compensation plans		3,893
Foreign currency translation adjustment, net of tax	(1,637)		(1,637)
Changes in employee benefit related items, net of tax	515		515
Balance, end of period at Sep. 30, 2023	1,972,494	(33,658)	(52,130)	1,321	2,056,961
Balance, beginning of period at Jun. 30, 2023		(35,152)	(46,487)	1,332	2,124,142
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	56,991			51	56,940
Cash distributions to Unitholders				(62)	(69,271)
Retirement of AB Holding Units					(55,168)
Issuance of AB Holding Units to fund long-term incentive compensation plan awards					318
Change in AB Holding Units held by AB to fund long-term incentive compensation plans		1,494
Foreign currency translation adjustment, net of tax	(5,901)		(5,901)
Changes in employee benefit related items, net of tax	258		258
Balance, end of period at Sep. 30, 2023	1,972,494	(33,658)	(52,130)	1,321	2,056,961
Balance, beginning of period at Dec. 31, 2023	2,076,245	(30,185)	(42,044)	1,327	2,147,147
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	317,940			278	317,662
Cash distributions to Unitholders				(221)	(253,702)
Retirement of AB Holding Units	(66,477)				(66,477)
Issuance of AB Holding Units to fund long-term incentive compensation plan awards	20,430				20,430
Change in AB Holding Units held by AB to fund long-term incentive compensation plans		(3,205)
Foreign currency translation adjustment, net of tax	6,795		6,795
Changes in employee benefit related items, net of tax	326		326
Balance, end of period at Sep. 30, 2024	2,098,131	(33,390)	(34,923)	1,384	2,165,060
Balance, beginning of period at Jun. 30, 2024		(36,646)	(42,511)	1,343	2,162,868
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	127,195			112	127,083
Cash distributions to Unitholders				(71)	(81,141)
Retirement of AB Holding Units					(44,063)
Issuance of AB Holding Units to fund long-term incentive compensation plan awards					313
Change in AB Holding Units held by AB to fund long-term incentive compensation plans		3,256
Foreign currency translation adjustment, net of tax	7,473		7,473
Changes in employee benefit related items, net of tax	115		115
Balance, end of period at Sep. 30, 2024	$ 2,098,131	$ (33,390)	$ (34,923)	$ 1,384	$ 2,165,060