Net Income per Unit (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
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	$ 309,572	$ 175,737	$ 527,499	$ 369,888
Weighted average limited partnership units outstanding – basic (in shares)	287,192,000	285,670,000	287,034,000	285,698,000
Weighted average limited partnership units outstanding – diluted (in shares)	287,192,000	285,670,000	287,034,000	285,698,000
Basic net income per AB Unit (in dollars per share)	$ 1.07	$ 0.61	$ 1.82	$ 1.28
Diluted net income per AB Unit (in dollars per share)	$ 1.07	$ 0.61	$ 1.82	$ 1.28
Anti-dilutive options excluded from diluted net income (in shares)	0	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%