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Long-term Incentive Compensation Plans - Narrative (Details) - shares shares in Millions	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Employees and Eligible Directors | AB Holding Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted AB holding unit awards to employees (in shares)	1.6	1.2

X

- Definition

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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- Definition

Number, before forfeiture, of shares issued under share-based payment arrangement. Excludes employee stock ownership plan (ESOP).

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