Segment Information - Narrative (Details) $ in Millions	12 Months Ended
Mar. 31, 2025 USD ($) segment	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments \| segment	2
Revenue	$ 3,195.5	$ 2,986.4	$ 3,083.8
Starz Business
Segment Reporting Information [Line Items]
Revenue	619.7	545.9	$ 775.5
Accounts receivable, after allowance for credit loss	$ 215.0	$ 33.4
One Customer \| Revenue Benchmark \| Customer Concentration Risk
Segment Reporting Information [Line Items]
Concentration risk, percentage	10.00%	10.00%	10.00%
Revenue	$ 513.4	$ 411.1	$ 337.1
Customer One \| Accounts Receivable \| Customer Concentration Risk
Segment Reporting Information [Line Items]
Concentration risk, percentage	12.80%	12.50%
Accounts receivable, after allowance for credit loss	$ 83.1	$ 100.9
Customer Two \| Accounts Receivable \| Customer Concentration Risk
Segment Reporting Information [Line Items]
Concentration risk, percentage	10.50%	10.70%
Accounts receivable, after allowance for credit loss	$ 68.1	$ 86.8

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business.

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