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OTHER ASSETS, NET (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Intangible Assets          
Less accumulated depreciation and amortization $ (103.7)   $ (103.7)   $ (98.3)
Data processing software, net 55.1   55.1   46.8
Other assets 121.9   121.9   135.9
Total other assets, net 177.0   177.0   182.7
Notes receivable, net 112.1   112.1   124.2
Amortization expense 17.2 $ 20.7 52.8 $ 68.2  
Impairment of assets 4.5 0.0 21.6 81.0  
Software development work in progress          
Intangible Assets          
Software 15.0   15.0   18.7
Data processing software          
Intangible Assets          
Software 143.8   143.8   $ 126.4
Amortization expense 2.3 $ 2.5 7.3 $ 7.5  
Impairment of assets $ 2.7   $ 2.7