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Investment In Films and Television Programs and Program Rights (Impairments) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2020 | Dec. 31, 2019
Segment Reporting Information [Line Items] |  |  |  |
Write downs on investments in films and television programs and licensed program rights | $ 18.9 | $ 111.2 | $ 38.0 | $ 113.5
Not included in segment operating results |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Write downs on investments in films and television programs and licensed program rights | 0.0 | 74.0 | 15.4 | 74.0
Motion Picture | Reportable Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Write downs on investments in films and television programs and licensed program rights | 13.7 | 37.2 | 14.6 | 38.8
Television Production | Reportable Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Write downs on investments in films and television programs and licensed program rights | $ 5.2 | $ 0.0 | $ 8.0 | $ 0.7

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 926 -SubTopic 20 -Section 50 -Paragraph 4C -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120154696&loc=SL120155252-107959 + Details
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