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Investment In Films and Television Programs and Program Rights (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Investment In Films And Television Programs and Program Rights [Abstract]
Write-downs to fair value or net realizable value	$ 135.5	$ 66.0	$ 36.3
Write-downs to fair value or net realizable value related to motion pictures	$ 55.2	$ 27.2	$ 33.6
Percentage of unamortized film costs, one year	46.70%
Percentage of unamortized film costs, three years	85.90%

X

- Definition

The percentage of unamortized film costs for released films and television programs, net of accumulated amortization and excluding acquired film libraries, that it expects to amortize within three years from the date of the balance sheet.

+ References

No definition available.

+ Details

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Period Type:	duration

X

- Definition

The percentage of unamortized film costs for released films and television programs, net of accumulated amortization and excluding acquired film libraries, that it expects to amortize within one year from the date of the balance sheet.

+ References

No definition available.

+ Details

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X

- Definition

Write downs to fair value or net realizable value recorded during the period related to motion pictures.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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X

- Definition

Investment In Films And Television Programs and Program Rights.

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No definition available.

+ Details

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X

- Definition

Write-downs to fair value or net realizable value included in investment in films and television programs and program rights.

+ References

No definition available.

+ Details

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