Net Income Per Unit (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Limited Partners interest in Company (as a percent)	99.00%
Net income per unit, basic and diluted [Abstract]
Net income attributable to AB Unitholders	$ 764,610	$ 831,813	$ 1,148,623
Weighted average units outstanding—basic (in shares)	285,125,000	273,943,000	271,729,000
Dilutive effect of compensatory options to buy AB Holding Units (in shares)	0	1,000	11,000
Weighted average units outstanding - diluted (in shares)	285,125,000	273,944,000	271,740,000
Basic net income per AB Unit (in dollars per unit)	$ 2.65	$ 3.01	$ 4.18
Diluted net income per AB Unit (in dollars per unit)	$ 2.65	$ 3.01	$ 4.18
Anti-dilutive options excluded from diluted net income (in units)	0	0	0
AB Holding | AB
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
General partnership interest in Company (percent)	1.00%