Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 181,998	$ 271,143	$ 417,680	$ 514,982
Other comprehensive (loss) income:
Foreign currency translation adjustments, before tax	(34,286)	2,088	(46,108)	(5,050)
Income tax benefit	534	26	635	48
Foreign currency translation adjustments, net of tax	(33,752)	2,114	(45,473)	(5,002)
Changes in employee benefit related items:
Amortization of prior service cost	6	6	12	12
Recognized actuarial gain	324	324	647	405
Changes in employee benefit related items	330	330	659	417
Income tax (expense)	(6)	(2)	(15)	(2)
Employee benefit related items, net of tax	324	328	644	415
Other comprehensive (loss) income	(33,428)	2,442	(44,829)	(4,587)
Less: Comprehensive (loss) income in consolidated entities attributable to non-controlling interests	(26,771)	3,573	(51,816)	3,281
Comprehensive income attributable to AB Unitholders	$ 175,341	$ 270,012	$ 424,667	$ 507,114