Acquisitions and Divestitures (Schedule of Purchase Price Allocation) (Details) (USD $)			0 Months Ended		6 Months Ended
	Dec. 31, 2012	Mar. 31, 2012	Jan. 13, 2012 Summit Entertainment, LLC [Member]		Jun. 30, 2012 Summit Entertainment, LLC [Member]
Purchase price consideration:
Cash			$ 361,914,000
Fair value of 5,837,781 of Lionsgate's shares issued			50,205,000
Purchase price			412,119,000
Fair value of contingent consideration			5,900,000	[1]
Required repayment of Summit's existing Term Loan			507,775,000
Total purchase consideration including debt repayment			925,794,000
Common shares issued as consideration in acquisition (in shares)			5,837,781
Provisional allocation of the estimated total purchase consideration:
Cash and cash equivalents			315,932,000	[2]
Restricted cash			5,126,000	[2]
Accounts receivable, net			161,203,000	[2]
Investment in films and television programs, net			627,679,000	[2]
Other assets acquired			7,972,000	[2]
Finite-lived intangible assets:
Sales agency relationships			6,200,000	[2]
Tradenames			6,600,000	[2]
Other liabilities assumed			(295,045,000)	[2]
Fair value of net assets acquired			835,667,000	[2]
Goodwill	323,328,000	326,633,000	90,127,000	[2]
Estimated total purchase consideration			925,794,000	[2]
Measurement Period Adjustments:
Measurement period adjustments, increase (decrease) to investment in films and television programs, net					(7,200,000)
Measurement period adjustments, increase (decrease) to other liabilities assumed					(10,500,000)
Measurement period adjustments, increase (decrease) to net assets					3,300,000
Measurement period adjustments, increase (decrease) to goodwill					$ (3,300,000)

[1] During the three months ended December 31, 2012, as a result of the box office performance of certain films it was estimated that the threshold criteria triggering the additional contingent consideration would not be met, and therefore, the fair value of the contingent consideration was adjusted to zero. Accordingly, the liability of $5.9 million was reversed as a benefit to direct operating expense on the consolidated statement of operations.

[2] Measurement period adjustments include a decrease to investment in films and television programs, net of $7.2 million and a decrease to other liabilities assumed of $10.5 million, resulting in a net increase of $3.3 million of the fair value of net assets acquired and a decrease of $3.3 million to goodwill.