Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 351,026	$ 165,240	$ 890,733	$ 547,918
Other comprehensive income (loss):
Foreign currency translation adjustments, before reclassification and tax:	18,677	(15,627)	6,789	(4,971)
Less: reclassification adjustment for (losses) in net income upon liquidation	0	0	(10,197)	0
Foreign currency translation adjustments, before tax	18,677	(15,627)	16,986	(4,971)
Income tax (expense)	(163)	(274)	(108)	(211)
Foreign currency translation adjustments, net of tax	18,514	(15,901)	16,878	(5,182)
Changes in employee benefit related items:
Amortization of prior service cost	6	6	18	18
Recognized actuarial gain	105	298	664	894
Changes in employee benefit related items	111	304	682	912
Income tax (expense)	(1)	(1)	(8)	(5)
Employee benefit related items, net of tax	110	303	674	907
Other comprehensive income (loss)	18,624	(15,598)	17,552	(4,275)
Less: Comprehensive income in consolidated entities attributable to non-controlling interests	5,054	(2,164)	17,262	10,626
Comprehensive income attributable to AB Unitholders	$ 364,596	$ 151,806	$ 891,023	$ 533,017