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Segment Information (Purchase Accounting and Related Adjustments) (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Corporate and reconciling items
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Purchase accounting and related adjustments	[1]	$ 41.8	$ 5.4	$ 88.8	$ 11.8
Direct operating | Corporate and reconciling items
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Purchase accounting and related adjustments		10.2	3.3	26.0	7.7
General and administrative expense
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Purchase accounting and related adjustments		1.6	1.3	3.0	2.5
General and administrative expense | Corporate and reconciling items
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Purchase accounting and related adjustments		1.6	1.3	2.9	2.5
Depreciation and amortization expense | Corporate and reconciling items
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Purchase accounting and related adjustments		$ 30.0	$ 0.8	$ 59.9	$ 1.6
[1] Purchase accounting and related adjustments represent the amortization of non-cash fair value adjustments to certain assets acquired in the acquisition of Starz and Pilgrim Media Group. The following sets forth the amounts included in each line item in the financial statements:

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- Definition

The amortization of non-cash fair value adjustments to the assets and liabilities acquired in the acquisition of businesses.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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