Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenues:
Dividend and interest income	$ 199,443	$ 123,091	$ 38,734
Investment gains (losses)	14,206	(102,413)	(636)
Other revenues	101,342	105,544	108,409
Total revenues	4,262,864	4,120,728	4,445,288
Less: Broker-dealer related interest expense	107,541	66,438	3,686
Net revenues	4,155,323	4,054,290	4,441,602
Expenses:
Employee compensation and benefits	1,769,153	1,666,636	1,716,013
Promotion and servicing:
Amortization of deferred sales commissions	36,817	34,762	34,364
Trade execution, marketing, T&E and other	215,643	215,556	197,486
General and administrative	581,571	641,635	555,608
Arrangements expense	22,853	6,563	2,710
Interest on borrowings	54,394	17,906	5,145
Amortization of intangible assets	46,854	26,564	5,697
Total expenses	3,337,653	3,239,194	3,225,140
Operating income	817,670	815,096	1,216,462
Income tax	29,051	39,639	62,728
Net income	788,619	775,457	1,153,734
Net income (loss) income of consolidated entities attributable to non-controlling interests	24,009	(56,356)	5,111
Net income attributable to AB Unitholders	$ 764,610	$ 831,813	$ 1,148,623
Net income per AB Unit:
Basic (in dollars per share)	$ 2.65	$ 3.01	$ 4.18
Diluted (in dollars per share)	$ 2.65	$ 3.01	$ 4.18
Investment advisory and services fees
Revenues:
Revenue subject to contracts with customers	$ 2,975,468	$ 2,971,038	$ 3,194,524
Bernstein research services
Revenues:
Revenue subject to contracts with customers	386,142	416,273	452,017
Distribution related
Revenues:
Revenue subject to contracts with customers	586,263	607,195	652,240
Promotion and servicing:
Distribution-related payments	$ 610,368	$ 629,572	$ 708,117