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Goodwill and Other Intangibles, Net - Amortizable Intangible Assets (Parenthetical) (Details) - USD ($)
3 Months Ended 9 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Sep. 30, 2024
Dec. 31, 2024
Finite-Lived Intangible Assets [Line Items]        
Impairment charge     $ 60  
Impairment charges on assets $ 1,400,000 $ 0    
Accumulated Amortization (975,300,000)     $ (1,008,900,000)
Indefinite-Lived Intangible Assets [Member]        
Finite-Lived Intangible Assets [Line Items]        
Impairment charges on assets 15,800,000      
Customer relationship intangible asset 79,200,000      
Accumulated Amortization (63,400,000)      
Customer Relationships        
Finite-Lived Intangible Assets [Line Items]        
Accumulated Amortization $ (345,700,000)     $ (402,100,000)