Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 225,955	$ 203,918
Other comprehensive (loss) income:
Foreign currency translation adjustments, before tax	(10,309)	6,131
Income tax benefit	109	47
Foreign currency translation adjustments, net of tax	(10,200)	6,178
Changes in employee benefit related items:
Amortization of prior service cost	6	6
Recognized actuarial gain	669	298
Changes in employee benefit related items	675	304
Income tax (expense)	(5)	(3)
Employee benefit related items, net of tax	670	301
Other comprehensive (loss) income	(9,530)	6,479
Less: Comprehensive income in consolidated entities attributable to non-controlling interests	8,028	9,767
Comprehensive income attributable to AB Unitholders	$ 208,397	$ 200,630