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Goodwill and Intangible Assets (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Mar. 31, 2024	Dec. 08, 2016
Goodwill [Line Items]
Goodwill impairment charge			$ 493.9
Impairment of Starz tradename indefinite lived intangible assets	$ 170.0
Trade names intangible asset, estimated useful life	10 years		10 years
Forecast
Goodwill [Line Items]
Increase to amortization expense				$ 4.0
Trade Names
Goodwill [Line Items]
Indefinite-lived intangible assets - Starz tradename	$ 80.0		$ 80.0
Media Networks
Goodwill [Line Items]
Goodwill impairment charge	493.9	$ 1,475.0
Media Networks | Customer Relationships
Goodwill [Line Items]
Finite-lived customer relationship intangible assets, net	$ 956.8		956.8
Media Networks | Trade Names
Goodwill [Line Items]
Indefinite-lived intangible assets - Starz tradename					$ 250.0
Media Networks
Goodwill [Line Items]
Goodwill impairment charge			$ 493.9

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