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Segment Information (Adjusted Depreciation and Amortization, COVID-19 Related Costs and Programming and Content Charges) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Depreciation and amortization	$ 45.8	$ 51.9	$ 142.9	$ 143.0
Adjusted depreciation and amortization	10.8	10.5	32.9	31.5
COVID-19 related charges	14.0		52.7
Corporate and reconciling items
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Adjusted depreciation and amortization	10.8	10.5	32.9	31.5
COVID-19 related charges	14.0	0.0	52.7	0.0
Programming and content charges	0.0	74.0	0.0	74.0
Purchase accounting and related adjustments | Corporate and reconciling items
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Depreciation and amortization	$ (35.0)	$ (41.4)	$ (110.0)	$ (111.5)

X

- Definition

The amount of depreciation and amortization as presented on the statement of operations, less the depreciation and amortization related to the non-cash fair value adjustments to property and equipment and intangible assets acquired in the acquisition of businesses, which are included in purchase accounting and related adjustments.

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Programming and content charges as a result of changes to programming strategy and broadcasting strategy in connection with recent management changes, that are included in direct operating expense.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Amount, before deduction of insurance proceeds, of loss recognized in the income statement for an event or transaction that is unusual in nature or infrequent in occurrence, or both.

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