Condensed Statements of Cash Flows - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities:
Net income	$ 85,928,000	$ 81,087,000
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in net income attributable to AB Unitholders	(94,353,000)	(88,907,000)
Cash distributions received from AB	136,714,000	106,091,000
Changes in assets and liabilities:
Decrease in other assets	0	92,000
(Decrease) increase in other liabilities	(1,146,000)	5,778,000
Net cash provided by operating activities	127,143,000	104,141,000
Cash flows from investing activities:
Investments in AB with proceeds from exercise of compensatory options to buy AB Holding Units	0	(1,914,000)
Net cash used in investing activities	0	(1,914,000)
Cash flows from financing activities:
Cash distributions to Unitholders	(127,672,000)	(98,045,000)
Capital contributions from (to) AB	529,000	(6,096,000)
Proceeds from exercise of compensatory options to buy AB Holding Units	0	1,914,000
Net cash used in financing activities	(127,143,000)	(102,227,000)
Change in cash and cash equivalents	0	0
Cash and cash equivalents as of beginning of period	0	0
Cash and cash equivalents as of end of period	$ 0	$ 0