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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, 2023	Mar. 31, 2022	Mar. 31, 2021
Segment Reporting Information [Line Items]
Acquisition of investment in films and television programs and program rights	$ 1,979.2	$ 2,211.7	$ 1,616.7
Reportable Segments | Motion Picture
Segment Reporting Information [Line Items]
Acquisition of investment in films and television programs and program rights	483.6	465.0	339.8
Reportable Segments | Television Production
Segment Reporting Information [Line Items]
Acquisition of investment in films and television programs and program rights	1,082.0	1,287.0	856.1
Reportable Segments | Media Networks
Segment Reporting Information [Line Items]
Acquisition of investment in films and television programs and program rights	1,173.0	1,134.6	625.1
Intersegment Eliminations
Segment Reporting Information [Line Items]
Acquisition of investment in films and television programs and program rights	$ (759.4)	$ (674.9)	$ (204.3)

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Acquisition of investment in films and television programs and program rights.

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