Subsequent Events - Ownership Interest, Including Limited Partners (Details) - AB		6 Months Ended
	Jul. 10, 2025	Jun. 30, 2025
Subsequent Event [Line Items]
Limited partners or members ownership interest in company (percent)		100.00%
EQH and its subsidiaries
Subsequent Event [Line Items]
Limited partners or members ownership interest in company (percent)		61.90%
AB Holding
Subsequent Event [Line Items]
Limited partners or members ownership interest in company (percent)		37.50%
Unaffiliated holders
Subsequent Event [Line Items]
Limited partners or members ownership interest in company (percent)		0.60%
Subsequent Event
Subsequent Event [Line Items]
Limited partners or members ownership interest in company (percent)	100.00%
Subsequent Event | EQH and its subsidiaries
Subsequent Event [Line Items]
Limited partners or members ownership interest in company (percent)	68.50%
Subsequent Event | AB Holding
Subsequent Event [Line Items]
Limited partners or members ownership interest in company (percent)	30.80%
Subsequent Event | Unaffiliated holders
Subsequent Event [Line Items]
Limited partners or members ownership interest in company (percent)	0.70%