Condensed Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Revenues:
Dividend and interest income	$ 30,470	$ 34,350
Investment gains (losses)	31,059	(20,538)
Other revenues	35,170	30,180
Total revenues	1,214,731	1,098,124
Less: Broker-dealer related interest expense	13,005	17,517
Net revenues	1,201,726	1,080,607
Expenses:
Employee compensation and benefits	467,557	420,531
Promotion and servicing:
Amortization of deferred sales commissions	21,495	20,161
Trade execution, marketing, T&E and other	40,517	36,513
General and administrative	130,391	147,935
Interest on borrowings	7,207	7,138
Amortization of intangible assets	11,163	11,301
Total expenses	874,926	844,238
Operating income	326,800	236,369
Income taxes	18,164	14,675
Net income	308,636	221,694
Net income of consolidated entities attributable to non-controlling interests	13,151	895
Net income attributable to AB Unitholders	$ 295,485	$ 220,799
Earnings Per Unit [Abstract]
Net income per AB Unit - basic (in dollars per share)	$ 1.00	$ 0.75
Net income per AB Unit - diluted (in dollars per share)	$ 1.00	$ 0.75
Investment advisory and services fees
Revenues:
Revenue subject to contracts with customers	$ 915,214	$ 855,112
Distribution revenues
Revenues:
Revenue subject to contracts with customers	202,818	199,020
Promotion and servicing:
Distribution-related payments	$ 196,596	$ 200,659