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Equity Appreciation Rights (Tables)
 9 Months Ended
Sep. 30, 2026
Share-Based Payment Arrangement [Abstract]  
Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award
Equity appreciation rights cost by award type was as follows:
Three months ended September 30,Nine months ended September 30,
2026202520262025
Equity appreciation rights expense - EAR Plan$— $5.3 $— $32.6 
Equity appreciation rights expense - Amended EAR Plan11.3 — 38.0 — 
Total Equity appreciation rights expense$11.3 $5.3 $38.0 $32.6