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Consolidating Financial Information - Convertible Senior Subordinated Notes (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Senior Secured Second-Priority Notes | 5.25% Senior Notes
Consolidating Financial Information [Line Items]
Coupon rate	5.25%
Convertible Senior Subordinated Notes | January 2012 Notes
Consolidating Financial Information [Line Items]
Coupon rate	4.00%
Convertible Senior Subordinated Notes | April 2013 Notes
Consolidating Financial Information [Line Items]
Coupon rate	1.25%
Lions Gate Entertainment Inc.
Consolidating Financial Information [Line Items]
Percentage ownership of LGEI, the issuer, by the parent company guarantor	100.00%
Starz
Consolidating Financial Information [Line Items]
Cash acquired from acquisition	$ 73.5
Pilgrim Media Group
Consolidating Financial Information [Line Items]
Cash acquired from acquisition		$ 15.8

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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
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-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3179-108585

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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