Unaudited Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Net loss	$ (1.2)	$ (149.3)	$ (59.7)	$ (160.6)
Foreign currency translation adjustments, net of tax	0.5	(1.7)	1.4	(7.8)
Net unrealized gain (loss) on cash flow hedges, net of tax	(20.8)	9.7	(66.7)	4.5
Comprehensive loss	(21.5)	(141.3)	(125.0)	(163.9)
Less: Comprehensive loss attributable to noncontrolling interests	3.0	5.2	7.5	8.7
Comprehensive loss attributable to Lions Gate Entertainment Corp. shareholders	$ (18.5)	$ (136.1)	$ (117.5)	$ (155.2)