Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2024

Accounting Policies [Abstract]

Schedule of Share-based Compensation, Employee Stock Purchase Plan, Activity

Repurchases of AB Holding Units for the years ended December 31, 2024 and 2023 consisted of the following:

	Years Ended December 31
	2024			2023
	(in millions)
Total amount of AB Holding Units Purchased(1)		4.5			4.7
Total Cash Paid for AB Holding Units Purchased(1)		$	156.2		$	144.4
Open Market Purchases of AB Holding Units Purchased(1)		1.8			2.0
Total Cash Paid for Open Market Purchases of AB Holding Units(1)		$	60.1		$	62.6

(1)Purchased on a trade date basis. The difference between open-market purchases and units retained reflects the retention of AB Holding Units from employees to fulfill statutory tax withholding requirements at the time of delivery of long-term incentive compensation awards.