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Long-term Incentive Compensation Plans (Tables)
 12 Months Ended
Dec. 31, 2023
Compensation Related Costs [Abstract]  
Schedule of Option Awards Activity
Schedule of Activity of Unvested Restricted Holding Units Grant details related to these awards is as follows:
202320222021
Restricted Units Awarded30,102 30,870 35,358 
Weighted Average Grant Date Fair Value$33.89 $38.55 $44.29 
Compensation Expense (in millions)$1.0 $1.2 $1.6 
Grant details related to these awards is as follows:
202320222021
(in millions excluding share prices)
Restricted Units Awarded0.5 0.5 3.4 
Grant Date Fair Value Range
$27.86 - $38.58
$34.86 - $49.90
$29.06 - $53.86
Compensation Expense$30.1 $35.0 $40.9 
The fair value of the restricted AB Holding Units is amortized over the requisite service period as compensation expense. Changes in unvested restricted AB Holding Units during 2023 are as follows:
AB Holding
Units		Weighted Average
Grant Date Fair
Value per AB Holding
Unit
Unvested as of December 31, 202214,772,236 $36.92 
Granted5,664,619 31.05 
Vested(6,598,656)35.74 
Forfeited(390,644)37.36 
Unvested as of December 31, 202313,447,555 $35.02