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Fair Value Measurements (Tables)
12 Months Ended
Dec. 31, 2023
Fair Value Disclosures [Abstract]  
Schedule of Financial Instruments Recorded at Fair Value
Financial Instruments Recorded at Fair Value (in millions):
December 31, 2023December 31, 2022
 Level 1Level 2Level 3TotalLevel 1Level 2Level 3Total
Assets:        
Cash and cash equivalents$201.2 $— $— $201.2 $179.9 $— $— $179.9 
Deferred compensation asset (a)3.3 — — 3.3 2.4 — — 2.4 
Liabilities:  
Deferred compensation obligation (a)
$3.3 $— $— $3.3 $2.4 $— $— $2.4 
 
(a)    The deferred compensation obligation represents the balance of deferred compensation plus net investment earnings. The deferred compensation plan is funded through a rabbi trust. Trust funds are invested in mutual funds for which unit prices are quoted in active markets and are classified within Level 1 of the valuation hierarchy.