Long-Term Incentive Compensation Plans - Summary of Changes in Unvested Restricted AB Holding Units (Details) - Restricted Stock Units (RSUs)	12 Months Ended
	Dec. 31, 2022 $ / shares shares
AB Holding Units
Unvested, beginning balance (in units) | shares	18,130,740
Granted (in units) | shares	4,709,600
Vested (in units) | shares	(7,671,109)
Forfeited (in units) | shares	(396,995)
Unvested, ending balance (in units) | shares	14,772,236
Weighted Average Grant Date Fair Value per AB Holding Unit
Unvested, Beginning Weighted Average Grant Date Fair Value per AB Holding Unit (in dollars per unit) | $ / shares	$ 33.98
Granted, Weighted Average Grant Date Fair Value per AB Holding Unit (in dollars per unit) | $ / shares	40.31
Vested, Weighted Average Grant Date Fair Value per AB Holding Unit (in dollars per unit) | $ / shares	32.10
Forfeited, Weighted Average Grant Date Fair Value per AB Holding Unit (in dollars per unit) | $ / shares	36.15
Unvested, Ending Weighted Average Grant Date Fair Value per AB Holding Unit (in dollars per unit) | $ / shares	$ 36.92