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Supplemental Consolidated Cash and Cash Flow Information - Schedule Supplemental Cash Flow And Restrictions on Cash and Cash Equivalents (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Dec. 31, 2023
Supplemental Cash Flow Elements [Abstract]        
Cash $ 46.7   $ 33.1  
Restricted cash 255.8   5.0  
Total cash and restricted cash reported in the Consolidated Statement of Cash Flows 302.5 $ 39.8 $ 38.1 $ 29.7
Interest 27.9 25.1    
Income taxes $ 21.7 $ 20.1