Goodwill (Details) - USD ($) $ in Millions	9 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 811.2
Measurement period adjustments	(2.7)
Goodwill, ending balance	808.5
Adjustment to purchase price related to settlement of certain working capital items	12.0	$ 0.0
eOne
Goodwill [Roll Forward]
Measurement period adjustments	2.7
Decrease to accounts receivable	5.6
Decrease in investment in films and television programs	1.6
Increase to content related payables	3.4
Decrease to participation and residuals	1.0
Increase in accrued and other liabilities	1.9
Increase to other assets	4.2
Motion Picture
Goodwill [Roll Forward]
Goodwill, beginning balance	398.6
Measurement period adjustments	(1.7)
Goodwill, ending balance	396.9
Television Production
Goodwill [Roll Forward]
Goodwill, beginning balance	412.6
Measurement period adjustments	(1.0)
Goodwill, ending balance	$ 411.6