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Income Taxes - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Mar. 31, 2022
Income Tax Contingency [Line Items] |  |  |
Tax Credit Carryforward, Amount | $ 251.6 |  |
Unrecognized tax benefits that would impact effective tax rate | 0.4 |  |
Estimate unrecognized tax benefits decrease resulting from prior period tax positions | (1.5) |  |
CANADA |  |  |
Income Tax Contingency [Line Items] |  |  |
Tax Credit Carryforward, Amount | 359.6 |  |
SPAIN |  |  |
Income Tax Contingency [Line Items] |  |  |
Tax Credit Carryforward, Amount | 96.1 |  |
State and Local Jurisdiction |  |  |
Income Tax Contingency [Line Items] |  |  |
Operating Loss Carryforwards |  | $ 95.1 |
Starz Business of Lions Gate Entertainment Corp |  |  |
Income Tax Contingency [Line Items] |  |  |
Unrecognized tax benefits that would impact effective tax rate | 5.8 |  |
Unrecognized tax benefits increases resulting from current period tax position | (9.1) | 5.3 | $ 5.8
Unrecognized tax benefits interest on income taxes accrued | 4.2 | $ 16.5 |
Derease in unrecognized tax benefits is reasonably possible | $ 7.3 |  |
Open Tax Year | 2012 2020 |  |
Starz Business of Lions Gate Entertainment Corp | CANADA | Two Thousand And Thirty |  |  |
Income Tax Contingency [Line Items] |  |  |
Operating Loss Carryforwards | $ 56.2 |  |
Starz Business of Lions Gate Entertainment Corp | UNITED STATES |  |  |
Income Tax Contingency [Line Items] |  |  |
Operating Loss Carryforwards | 323.0 |  |
Starz Business of Lions Gate Entertainment Corp | UNITED STATES | Tax Year Two Thousand And Thirty Eight |  |  |
Income Tax Contingency [Line Items] |  |  |
Operating Loss Carryforwards | 157.8 |  |
Starz Business of Lions Gate Entertainment Corp | UNITED STATES | Tax Year Two Thousand And Twenty Seven |  |  |
Income Tax Contingency [Line Items] |  |  |
Operating Loss Carryforwards | 307.0 |  |
Tax Credit Carryforward, Amount | 8.3 |  |
Starz Business of Lions Gate Entertainment Corp | LUXEMBOURG | Two Thousand And Thirty |  |  |
Income Tax Contingency [Line Items] |  |  |
Operating Loss Carryforwards | 403.6 |  |
Starz Business of Lions Gate Entertainment Corp | INDIA | Two Thousand And Thirty |  |  |
Income Tax Contingency [Line Items] |  |  |
Operating Loss Carryforwards | $ 22.4 |  |

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