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Mergers and Acquisitions (Pro Forma Statement of Operations Information) (Details) - USD ($) $ / shares in Units, $ in Millions | 9 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015
Starz |  |
Business Acquisition [Line Items] |  |
Revenues | $ 3,063 | $ 2,806
Net income attributable to Lions Gate Entertainment Corp. shareholders | $ 119 | $ 134
Basic Net Income Per Common Share attributable to Lions Gate Entertainment Corp. shareholders (in usd per share) | $ 0.61 | $ 0.68
Diluted Net Income Per Common Share attributable to Lions Gate Entertainment Corp. shareholders (in usd per share) | $ 0.60 | $ 0.63
Pilgrim Media Group |  |
Business Acquisition [Line Items] |  |
Revenues |  | $ 1,662
Net income attributable to Lions Gate Entertainment Corp. shareholders |  | $ 46
Basic Net Income Per Common Share attributable to Lions Gate Entertainment Corp. shareholders (in usd per share) |  | $ 0.31
Diluted Net Income Per Common Share attributable to Lions Gate Entertainment Corp. shareholders (in usd per share) |  | $ 0.30

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