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Programming Content - Schedule of Capitalized Costs for Film (Details) - USD ($)
$ in Millions
Sep. 30, 2025
Mar. 31, 2025
Other Industries [Abstract]    
Licensed program rights, net of accumulated amortization $ 999.2 $ 1,080.0
Owned and produced films and television programs:    
Released, net of accumulated amortization 3.7 9.2
In progress 16.3 0.0
In development 9.5 7.1
Total 29.5 16.3
Programming content, net $ 1,028.7 $ 1,096.3