Long-term Incentive Compensation Plans (Details) - USD ($)	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units issued upon options exercised (in shares)	0	100,000
Proceeds from stock options exercised	$ 0	$ 1,914,000
Employees and Eligible Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted AB Holding Unit awards granted to employees and Eligible Directors (in shares)	700,000	3,400,000

Amount of cash inflow from exercise of option under share-based payment arrangement.

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