Long-term Incentive Compensation Plans (Details) - shares shares in Millions	6 Months Ended
Jun. 30, 2024	Jun. 30, 2023
Employees and Eligible Directors \| AB Holding Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted AB Holding Unit awards granted to employees and Eligible Directors (in shares)	1.2	0.4

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details