Segment Information - Schedule of Segment Information (Details) - USD ($) $ in Millions	3 Months Ended
Jun. 30, 2025	Jun. 30, 2024
Segment Reporting Information [Line Items]
Revenues	$ 525.9	$ 486.9
Segment direct operating expenses	333.6	284.7
Segment distribution and marketing	118.1	93.3
Gross contribution	74.2	108.9
Segment general and administration	33.0	47.1
Segment profit	41.2	61.8
General and administration	70.2	95.9
Reportable Segments
Segment Reporting Information [Line Items]
Segment general and administration	33.0	47.1
Segment profit	41.2	61.8
Reportable Segments \| Motion Picture
Segment Reporting Information [Line Items]
Revenues	267.3	349.6
Segment direct operating expenses	136.7	152.4
Segment distribution and marketing	105.8	82.8
Gross contribution	24.8	114.4
Segment general and administration	22.4	29.2
Segment profit	2.4	85.2
Reportable Segments \| Motion Picture \| Revision of Prior Period, Reclassification, Adjustment
Segment Reporting Information [Line Items]
Revenues		2.3
Segment direct operating expenses		1.8
Segment distribution and marketing		0.7
Gross contribution		0.2
Segment general and administration		0.7
Segment profit		0.9
Reportable Segments \| Television Production
Segment Reporting Information [Line Items]
Revenues	288.5	241.1
Segment direct operating expenses	239.6	202.0
Segment distribution and marketing	12.3	10.5
Gross contribution	36.6	28.6
Segment general and administration	10.6	17.9
Segment profit	26.0	10.7
Reportable Segments \| Studio Business
Segment Reporting Information [Line Items]
Revenues	555.8	590.7
Segment direct operating expenses	376.3	354.4
Segment distribution and marketing	118.1	93.3
Gross contribution	61.4	143.0
Segment profit	28.4	95.9
Intersegment Eliminations
Segment Reporting Information [Line Items]
Revenues	(29.9)	(103.8)
Segment direct operating expenses	(42.7)	(69.7)
Gross contribution	12.8	(34.1)
Segment profit	12.8	(34.1)
Intersegment Eliminations \| Motion Picture
Segment Reporting Information [Line Items]
Revenues	(3.1)	(64.2)
Intersegment Eliminations \| Television Production
Segment Reporting Information [Line Items]
Revenues	(26.8)	(39.6)
Intersegment Eliminations \| Studio Business
Segment Reporting Information [Line Items]
Revenues	$ (29.9)	$ (103.8)

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