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Investment in Films and Television Programs and Licensed Program Rights (Impairments) (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Segment Reporting Information [Line Items]
Write downs on investments in films and television programs and licensed program rights	$ 420.3	$ 390.1	$ 73.0
Development costs, written off	12.8
Not included in segment operating results | Direct Operating Expense
Segment Reporting Information [Line Items]
Write downs on investments in films and television programs and licensed program rights	$ 0.0	$ 0.0	$ 36.9
Film, Monetized on Its Own, and Film Group, Impairment, Statement of Income or Comprehensive Income [Extensible Enumeration]	Total direct operating expense on consolidated statements of operations	Total direct operating expense on consolidated statements of operations	Total direct operating expense on consolidated statements of operations
Not included in segment operating results | Restructuring and Other
Segment Reporting Information [Line Items]
Write downs on investments in films and television programs and licensed program rights	$ 377.3	$ 379.3	$ 0.0
Film, Monetized on Its Own, and Film Group, Impairment, Statement of Income or Comprehensive Income [Extensible Enumeration]	Restructuring and other	Restructuring and other	Restructuring and other
Motion Picture | Reportable Segments
Segment Reporting Information [Line Items]
Write downs on investments in films and television programs and licensed program rights	$ 34.6	$ 6.2	$ 1.2
Television Production | Reportable Segments
Segment Reporting Information [Line Items]
Write downs on investments in films and television programs and licensed program rights	$ 8.4	$ 4.6	$ 34.9

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Development Costs, Write Off

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- Definition

Amount of impairment loss on capitalized cost for film predominantly monetized on its own and film group.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 926
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 4C
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483154/926-20-50-4C

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Indicates line item in statement in which net income is reported that includes impairment loss on capitalized cost for film predominantly monetized on its own and film group.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 926
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 4C
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483154/926-20-50-4C

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