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Mergers and Acquisitions (Pro Forma Statement of Operations Information) (Details) - Starz $ / shares in Units, $ in Millions | 12 Months Ended
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Mar. 31, 2017 USD ($) $ / shares
Business Acquisition [Line Items] |
Revenues | $ | $ 4,323.7
Net income attributable to Lions Gate Entertainment Corp. shareholders | $ | $ 148.4
Basic Net Income Per Common Share attributable to Lions Gate Entertainment Corp. shareholders (in usd per share) | $ / shares | $ 0.74
Diluted Net Income Per Common Share attributable to Lions Gate Entertainment Corp. shareholders (in usd per share) | $ / shares | $ 0.71

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