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Subsequent Events (Details) - USD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
May 11, 2017 | Mar. 31, 2017 | Mar. 31, 2016 | Mar. 31, 2015
Subsequent Event [Line Items] |  |  |  |
Proceeds from the sale of equity method investees |  | $ 0.0 | $ 0.0 | $ 14.5
Distribution from equity method investee |  | $ 14.0 | $ 0.0 | $ 7.8
Disposed by sale | EPIX | Subsequent Event |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Percentage sold of equity interest | 100.00% |  |  |
Proceeds from the sale of equity method investees | $ 397.2 |  |  |
Gain on sale of equity method investee | 200.0 |  |  |
Gain on sale of equity method investment, net of tax | $ 125.0 |  |  |
Lions Gate Films Holdings Co No 2 Inc, Viacom and Paramount [Member] | Disposed by sale | EPIX | Subsequent Event |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Percentage sold of equity interest | 80.91% |  |  |
Lions Gate | Disposed by sale | EPIX | Subsequent Event |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Percentage sold of equity interest | 31.15% |  |  |
Proceeds from the sale of equity method investees | $ 373.8 |  |  |
Distribution from equity method investee | $ 23.4 |  |  |

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- Definition This item represents disclosure of the amount of dividends or other distributions received from unconsolidated subsidiaries, certain corporate joint ventures, and certain noncontrolled corporation; these investments are accounted for under the equity method of accounting. This element excludes distributions that constitute a return of investment, which are classified as investing activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(10)) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(12)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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- Definition The cash inflow associated with the sale of equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3179-108585 + Details
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