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Noncontrolling Interests - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Jun. 30, 2026
Mar. 31, 2026
May 30, 2025
Redeemable Noncontrolling Interest [Line Items]      
Total assets $ 5,333.0 $ 5,327.1  
Liabilities 6,391.1 6,376.5  
Variable Interest Entity, Primary Beneficiary      
Redeemable Noncontrolling Interest [Line Items]      
Total assets 59.9    
Liabilities 2.4    
Arts Entertainment LLC      
Redeemable Noncontrolling Interest [Line Items]      
Redeemable noncontrolling interest 19.2 $ 20.1  
Percentage of voting interests acquired (as percent)     51.00%
3 Arts Entertainment      
Redeemable Noncontrolling Interest [Line Items]      
Redeemable noncontrolling interest $ 87.5    
Noncontrolling owner's right to purchase remaining ownership interest (as percent) 24.00%    
Due to noncontrolling interest $ 88.4    
3 Arts Entertainment | Arts Entertainment LLC      
Redeemable Noncontrolling Interest [Line Items]      
Ownership percentage by noncontrolling owners     49.00%
Arts Entertainment LLC | Arts Entertainment LLC      
Redeemable Noncontrolling Interest [Line Items]      
Ownership percentage by noncontrolling owners 49.00%    
CP LG Library Holdings, LLC      
Redeemable Noncontrolling Interest [Line Items]      
Ownership percentage by noncontrolling owners 49.00%