Net Income (Loss) Per Share (Basic) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended	6 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Numerator:
Net income (loss) attributable to Lions Gate Entertainment Corp. shareholders	$ 7.5	$ (18.4)	$ (37.9)	$ 32.7
Denominator:
Weighted average common shares outstanding (in shares)	224.4	220.4	223.1	220.0
Basic net income (loss) per common share (in usd per share)	$ 0.03	$ (0.08)	$ (0.17)	$ 0.15

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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