Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 313,752	$ 178,760	$ 539,707	$ 382,678
Other comprehensive (loss) income:
Foreign currency translation adjustments, before reclassification and tax:	(1,579)	4,525	(11,888)	10,656
Less: reclassification adjustment for (losses) in net income upon liquidation	(10,197)	0	(10,197)	0
Foreign currency translation adjustments, before reclassification and tax:	8,618	4,525	(1,691)	10,656
Income tax (expense) benefit	(54)	16	55	63
Foreign currency translation adjustments, net of tax	8,564	4,541	(1,636)	10,719
Changes in employee benefit related items:
Amortization of prior service cost	6	6	12	12
Recognized actuarial (loss) gain	(110)	298	559	596
Changes in employee benefit related items	(104)	304	571	608
Income tax (expense)	(2)	(1)	(7)	(4)
Employee benefit related items, net of tax	(106)	303	564	604
Other comprehensive income (loss)	8,458	4,844	(1,072)	11,323
Less: Comprehensive income in consolidated entities attributable to non-controlling interests	4,180	3,023	12,208	12,790
Comprehensive income attributable to AB Unitholders	$ 318,030	$ 180,581	$ 526,427	$ 381,211