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Segment Information (Adjusted Depreciation and Amortization, Programming and Content Charges, COVID-19 Charges) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Depreciation and amortization		$ 197.7	$ 163.4	$ 159.0
Adjusted depreciation and amortization		41.8	41.1	39.3
COVID-19 related costs	$ 50.2
Programming and content charges		76.5	35.1	0.0
Corporate and reconciling items
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Adjusted depreciation and amortization		41.8	41.1	39.3
COVID-19 related costs		50.2	0.0	0.0
Programming and content charges		76.5	35.1	0.0
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		$ (155.9)	$ (122.3)	$ (119.7)

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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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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