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Segment Information (Acquisition of Investment in Films and Television Programs and Program Rights by Segment) (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Segment Reporting Information [Line Items]
Acquisition of investment in films and television programs and program rights	$ 1,409.3	$ 1,979.2	$ 2,211.7
Reportable Segments | Motion Picture
Segment Reporting Information [Line Items]
Acquisition of investment in films and television programs and program rights	416.6	483.6	465.0
Reportable Segments | Television Production
Segment Reporting Information [Line Items]
Acquisition of investment in films and television programs and program rights	712.8	1,082.0	1,287.0
Reportable Segments | Media Networks
Segment Reporting Information [Line Items]
Acquisition of investment in films and television programs and program rights	852.8	1,173.0	1,134.6
Intersegment Eliminations
Segment Reporting Information [Line Items]
Acquisition of investment in films and television programs and program rights	$ (572.9)	$ (759.4)	$ (674.9)

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