Unaudited Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (21.7)	$ (1.2)	$ 24.5	$ (59.7)
Foreign currency translation adjustments, net of tax	0.5	0.5	0.8	1.4
Net unrealized gain (loss) on cash flow hedges, net of tax	6.7	(20.8)	(0.3)	(66.7)
Comprehensive income (loss)	(14.5)	(21.5)	25.0	(125.0)
Less: Comprehensive loss attributable to noncontrolling interests	3.3	3.0	8.2	7.5
Comprehensive income (loss) attributable to Lions Gate Entertainment Corp. shareholders	$ (11.2)	$ (18.5)	$ 33.2	$ (117.5)