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Noncontrolling Interests (Narrative) (Details) - USD ($) $ in Millions					1 Months Ended	3 Months Ended	12 Months Ended
	Nov. 12, 2024	Nov. 12, 2022	May 29, 2018	Nov. 12, 2015	Feb. 28, 2023	Jun. 30, 2022	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2021	Nov. 14, 2022
Redeemable Noncontrolling Interest [Line Items]
Purchase of noncontrolling interest							$ (55.1)	$ 0.0	$ 0.0
Call period		30 days
Other							$ 1.7	$ 0.0	$ 0.0
3 Arts Entertainment
Redeemable Noncontrolling Interest [Line Items]
Deferred compensation arrangements			$ 38.3
Contingency period							5 years
Forecast
Redeemable Noncontrolling Interest [Line Items]
Call period	30 days
3 Arts Entertainment
Redeemable Noncontrolling Interest [Line Items]
Put rights exercise period							60 days
Period after expiration of put rights that call rights begin							30 days
Call rights exercise period							60 days
Pilgrim Media Group
Redeemable Noncontrolling Interest [Line Items]
Other						$ 2.7
3 Arts Entertainment
Redeemable Noncontrolling Interest [Line Items]
Initial fair value of redeemable noncontrolling interests			$ 15.8
Redeemable noncontrolling interest, ownership percentage held by noncontrolling interest holders			49.00%
Pilgrim Media Group
Redeemable Noncontrolling Interest [Line Items]
Initial fair value of redeemable noncontrolling interests				$ 90.1
Redeemable noncontrolling interest, ownership percentage held by noncontrolling interest holders				37.50%
Portion of noncontrolling interest redeemable after first term, five years after November 12, 2015		25.00%								25.00%
Settlement of exercised put option					$ 36.5
Purchase of noncontrolling interest					(55.1)
Reduction in accumulated deficit					$ 18.6

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