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Other Compensation Liabilities
 12 Months Ended
Dec. 31, 2024
Share-Based Payment Arrangement [Abstract]  
Other Compensation Liabilities Other Compensation Liabilities
Other compensation liabilities consisted of the following at December 31 (in millions):
 20242023
Share-based payments liability (Note 18)
$25.4 $23.0 
Profit interests compensation liability18.7 — 
Voluntary deferral plan liability (Note 17)
48.4 44.5 
Total other compensation liabilities$92.5 $67.5 
Profit interests compensation expense amounted to $19.0 million in 2024, $0.0 million in 2023, and $(28.0) million in 2022. Redemptions of profit sharing interests from Acadian LLC key employees for cash were $0.3 million in 2024, $0.0 million in 2023, and $2.7 million in 2022.