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Other Compensation Liabilities (Tables)
 12 Months Ended
Dec. 31, 2022
Share-Based Payment Arrangement [Abstract]  
Components of other compensation liabilities
Other compensation liabilities consisted of the following at December 31 (in millions):
 20222021
Share-based payments liability (Note 19)$19.4 $28.1 
Profit interests compensation liability— 30.6 
Voluntary deferral plan liability (Note 18)39.9 45.0 
Total other compensation liabilities$59.3 $103.7