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Income Taxes - Summary Of The Gross Unrecognized Tax Benefits, Exclusive Of Interest And Penalties (Details) - USD ($) $ in Millions | 12 Months Ended
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Mar. 31, 2024 | Mar. 31, 2023 | Mar. 31, 2022
Gross unrecognized tax benefits, Beginning Balance | $ 0.3 | $ 1.0 | $ 0.6
Increases related to current year tax position | 0.0 | 0.0 | 0.0
Increases related to prior year tax positions | 5.3 | 0.0 | 0.4
Decreases related to prior year tax positions | 0.0 | 0.0 | 0.0
Settlements | 0.0 | 0.0 | 0.0
Lapse in statute of limitations | (0.3) | (0.7) | 0.0
Gross unrecognized tax benefits, Ending Balance | 5.3 | 0.3 | 1.0
Starz Business of Lions Gate Entertainment Corp |  |  |
Gross unrecognized tax benefits, Beginning Balance | 64.6 | 69.1 | 67.4
Increases related to current year tax position | 0.0 | 0.0 | 0.0
Increases related to prior year tax positions | 0.0 | 0.2 | 2.6
Decreases related to prior year tax positions | 0.0 | 0.0 | 0.0
Settlements | (60.7) | (4.3) | 0.0
Lapse in statute of limitations | (0.8) | (0.4) | (0.9)
Gross unrecognized tax benefits, Ending Balance | $ 3.1 | $ 64.6 | $ 69.1

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- Definition Amount of unrecognized tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 217 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482663/740-10-55-217 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 15A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-15A Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 10B -Publisher FASB -URI https://asc.fasb.org/1943274/2147482525/740-10-45-10B + Details
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- Definition Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 217 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482663/740-10-55-217 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 15A -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-15A + Details
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- Definition Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 217 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482663/740-10-55-217 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 15A -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-15A + Details
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- Definition Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 15A -Subparagraph (a)(4) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-15A + Details
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