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Redeemable Noncontrolling Interests (Narrative) (Details) - USD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Nov. 12, 2015 | Mar. 31, 2017 | Mar. 31, 2016
Redeemable Noncontrolling Interest [Line Items] |  |  |
Initial fair value of redeemable noncontrolling interest |  | $ 0.0 | $ 90.1
Pilgrim Media Group |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |
Initial fair value of redeemable noncontrolling interest | $ 90.1 |  |
Redeemable noncontrolling interest, ownership percentage held by noncontrolling owner | 37.50% |  |
Portion of noncontrolling interest redeemable after first term, five years after November 12, 2015 |  | 17.50% |
First Put/ Call Option, Term |  | 5 years |
Second Put/ Call Option, Term |  | 7 years |

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- Definition The portion of redeemable noncontrolling interest, expressed as a percentage of the company acquired, that is redeemable at the completion of the first term. + References No definition available. + Details
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- Definition Period the derivative contract is outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Details
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