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Investment In Films and Television Programs and Program Rights (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Investment In Films And Television Programs and Program Rights [Abstract]
Fair value film write-downs	$ 24.2	$ 2.3	$ 26.8	$ 6.9

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Fair value film write-downs recorded during the period.

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Investment In Films And Television Programs and Program Rights.

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