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Related Party Transactions - Schedule of Net Transfers (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Mar. 31, 2023
Related Party Transaction [Line Items] |  |  |
Net transfers from Parent per combined statements of cash flows | $ (72.5) | $ (129.5) | $ (347.7)
Net Cash Flows Provided By Financing Activities - Discontinued Operations | 2.8 | 146.7 | 228.0
Share-based compensation from discontinued operations | 0.3 | 1.8 | 3.0
Related Party |  |  |
Related Party Transaction [Line Items] |  |  |
Net transfers from Parent per combined statements of cash flows | (75.3) | (276.2) | (575.7)
Share-based compensation (including allocation of share-based compensation) | (18.3) | (26.4) | (28.7)
Other non-cash transfer | 35.2 | 0.0 | 0.0
Net transfers from Parent per combined statements of equity (deficit) | (58.4) | (302.6) | (604.4)
Transfers to parent, net | 35.0 |  |
Related Party | Cash pooling and general financing activities |  |  |
Related Party Transaction [Line Items] |  |  |
Net transfers from Parent per combined statements of cash flows | (79.0) | 223.3 | (10.6)
Related Party | Licensing of content |  |  |
Related Party Transaction [Line Items] |  |  |
Net transfers from Parent per combined statements of cash flows | 0.8 | (550.1) | (713.2)
Related Party | Operating expense reimbursement |  |  |
Related Party Transaction [Line Items] |  |  |
Net transfers from Parent per combined statements of cash flows | 5.3 | (7.0) | (13.3)
Related Party | Corporate expense allocations (excluding allocation of share-based compensation) |  |  |
Related Party Transaction [Line Items] |  |  |
Net transfers from Parent per combined statements of cash flows | (2.4) | (27.9) | (22.3)
Related Party | Proceeds from sales of accounts receivable |  |  |
Related Party Transaction [Line Items] |  |  |
Net transfers from Parent per combined statements of cash flows | $ 0.0 | $ 85.5 | $ 183.7

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- Definition Amount of cash inflow (outflow) of financing activities of discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 24 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-24 + Details
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