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Debt - Schedule of Loss on Extinguishment of Debt (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Mar. 31, 2024 | Mar. 31, 2023 | Mar. 31, 2022
Extinguishment of Debt [Line Items] |  |  |  |  |
Loss on extinguishment of debt | $ (1.0) | $ 0.0 | $ (1.3) | $ (1.3) | $ (3.4)
Term Loan A and Term Loan B Facility |  |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |  |
Loss on extinguishment of debt | (1.0) | 0.0 |  |  |
Production Loan Prepayment |  |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |  |
Loss on extinguishment of debt |  |  | (1.3) | 0.0 | 0.0
Term Loan A |  |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |  |
Loss on extinguishment of debt |  |  | 0.0 | (1.3) | 0.0
Revolving Credit Facility And Term Loan A |  |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |  |
Loss on extinguishment of debt |  |  | 0.0 | 0.0 | (1.7)
Revolving Credit Facility |  |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |  |
Loss on extinguishment of debt |  |  | 0.0 | 0.0 | (1.1)
Term Loan B |  |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |  |
Loss on extinguishment of debt |  |  | 0.0 | 0.0 | (0.6)
Starz Business of Lions Gate Entertainment Corp |  |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |  |
Loss on extinguishment of debt | (4.9) | 21.2 | $ 21.2 | $ 58.7 | $ (24.8)
Starz Business of Lions Gate Entertainment Corp | 5.5% Senior Notes exchange and repurchases |  |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |  |
Loss on extinguishment of debt | $ (4.9) | $ 21.2 |  |  |

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- Definition Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481303/470-50-40-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481303/470-50-40-4 + Details
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