Commitments and Contingencies - Annual Repayment of Contractual Commitments (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Other Commitments [Line Items]
Total future commitments under contractual obligations, 2026	$ 412.0
Total future commitments under contractual obligations, 2027	214.8
Total future commitments under contractual obligations, 2028	115.0
Total future commitments under contractual obligations, 2029	89.4
Total future commitments under contractual obligations, 2030	46.7
Total future commitments under contractual obligations, Thereafter	154.9
Contractual commitments, total	1,032.8
Other	0.0	$ (93.2)	$ 1.7
Redeemable noncontrolling interest	93.7	123.3	$ 343.6	$ 321.2
3 Arts Entertainment
Other Commitments [Line Items]
Other		$ 93.2
Film related obligations commitments
Other Commitments [Line Items]
2026	187.3
2027	47.3
2028	5.8
2029	0.0
2030	0.0
Thereafter	0.0
Total	240.4
Interest payments
Other Commitments [Line Items]
2026	131.9
2027	100.0
2028	66.7
2029	55.8
2030	21.7
Thereafter	0.0
Total	376.1
Other contractual obligations
Other Commitments [Line Items]
2026	92.8
2027	67.5
2028	42.5
2029	33.6
2030	25.0
Thereafter	154.9
Total	$ 416.3