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Segment Information (Capital Expenditures By Segment) (Details) - USD ($) $ in Millions		12 Months Ended
		Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Segment Reporting Information [Line Items]
Capital expenditures		$ 43.8	$ 45.9	$ 25.2
Motion Picture
Segment Reporting Information [Line Items]
Capital expenditures		0.0	0.0	0.0
Television Production
Segment Reporting Information [Line Items]
Capital expenditures		3.2	1.4	1.8
Media Networks
Segment Reporting Information [Line Items]
Capital expenditures		30.0	31.5	10.6
Corporate
Segment Reporting Information [Line Items]
Capital expenditures	[1]	$ 10.6	$ 13.0	$ 12.8
[1] Represents unallocated capital expenditures primarily related to the Company's corporate headquarters.

X

- Definition

The cash outflow for purchases of and capital improvements on property, plant and equipment (capital expenditures), software, and other intangible assets.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585

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- Definition

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+ References

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