Film, Monetized on Its Own and Film, Monetized in Film Group, Number of Titles, Film and Television Libraries

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Description of Business, Basis of Presentation and Significant Accounting Policies (Other) (Details) title in Thousands, $ in Millions	3 Months Ended	12 Months Ended
	Sep. 30, 2022 USD ($)	Mar. 31, 2023 USD ($) title	Mar. 31, 2022 USD ($)	Mar. 31, 2021 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Goodwill impairment	$ 1,475.0	$ 1,475.0	$ 0.0	$ 0.0
Number of titles in library \| title		18
Goodwill		$ 1,289.5	2,764.5	2,764.5
Indefinite-lived Intangible Assets (Excluding Goodwill)		250.0
Advertising expenses		$ 610.7	$ 662.4	$ 532.6
Timing of payment		60 days
Minimum \| Perpetual Nominal Growth Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Goodwill measurement input	0.015
Minimum \| Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Goodwill measurement input	0.100
Maximum \| Perpetual Nominal Growth Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Goodwill measurement input	0.035
Maximum \| Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Goodwill measurement input	0.140