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Segment Information (Reconciliation of Total Assets By Segment to Consolidated Assets) (Details) - USD ($) $ in Millions	Jun. 30, 2021	Mar. 31, 2021
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 8,212.9	$ 8,306.2
Operating segments | Motion Picture
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	1,446.4	1,212.4
Operating segments | Television Production
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	1,806.0	1,757.9
Operating segments | Media Networks
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	4,431.9	4,399.3
Other unallocated assets
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 528.6	$ 936.6

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Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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