Consolidated Company-Sponsored Investment Funds - Summary of Balance Sheet Amounts (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Variable Interest Entity [Line Items]
Total assets	$ 11,138,931	$ 10,510,088
Liabilities	6,292,635	5,927,996
Redeemable non-controlling interest of consolidated entities	368,656	421,169
Partners' capital attributable to AB Unitholders	4,477,640	4,160,923	$ 4,111,523
Total liabilities, non-controlling interest and capital	11,138,931	10,510,088
Consolidated company-sponsored investment funds
Variable Interest Entity [Line Items]
Cash and cash equivalents	19,751	90,326
Investments	516,536	613,025
Other assets	44,424	30,461
Total assets	580,711	733,812
Liabilities	55,529	87,000
Redeemable non-controlling interest of consolidated entities	368,656	421,169
Partners' capital attributable to AB Unitholders	156,526	225,643
Total liabilities, non-controlling interest and capital	$ 580,711	$ 733,812