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Acquisitions (Narrative) (Details) $ / shares in Units, $ in Millions |  |  |  | 1 Months Ended | 3 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Jun. 05, 2024 USD ($) film | May 13, 2024 USD ($) $ / shares shares | Dec. 27, 2023 USD ($) | Aug. 08, 2024 USD ($) | Jun. 30, 2024 USD ($) | Mar. 31, 2024 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |
Number of films, acquired | film | 46 |  |  |  |  |
Gain (loss) recognized upon initial consolidation |  |  |  |  | $ 0.0 |
Total assets |  |  |  |  | 7,222.2 | $ 7,092.7
Total liabilities |  |  |  |  | 7,148.2 | $ 7,279.9
Proceeds from reverse recapitalization transaction |  | $ 330.0 |  |  |  |
Proceeds from private investments in public equities |  | 254.3 |  |  |  |
Proceeds due from the PIPE investment |  | $ 20.0 |  |  |  |
Proceeds from issuance or sale of equity |  |  |  |  | 282.7 |
Sale of noncontrolling interest in Lionsgate Studios Corp. (see Note 2) |  |  |  |  | (282.7) |
Variable Interest Entity, Primary Beneficiary |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Total assets |  |  |  |  | 79.8 |
Total liabilities |  |  |  |  | 11.2 |
Accumulated other comprehensive income |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Sale of noncontrolling interest in Lionsgate Studios Corp. (see Note 2) |  |  |  |  | 15.4 |
Noncontrolling Interests |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Sale of noncontrolling interest in Lionsgate Studios Corp. (see Note 2) |  |  |  |  | 95.6 |
CP LG Library Holdings, LLC |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Asset acquisition, purchase price | $ 68.6 |  |  |  |  |
Studio Business |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Ownership percentage by noncontrolling owners |  | 12.20% |  |  |  |
Ownership percentage, parent |  | 87.80% |  |  |  |
CP LG Library Holdings |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Ownership percentage by noncontrolling owners | 49.00% |  |  |  |  |
CP LG Library Holdings, LLC |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Ownership percentage by noncontrolling owners | 49.00% |  |  |  |  |
Screaming Eagle | Studio Business |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Ownership percentage by noncontrolling owners |  | 12.20% |  |  |  |
Screaming Eagle Acquisition Corp, Sponsor Options |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Common shares, shares issued (in shares) | shares |  | 2,200,000 |  |  |  |
Sponsor Option Agreement |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Common stock, par value (in dollars per share) | $ / shares |  | $ 0.0001 |  |  |  |
Sponsor Securities Repurchase |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Shares issued, price per share (in dollars per share) | $ / shares |  | $ 16.05 |  |  |  |
Film and Television Library | CP LG Library Holdings, LLC |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Asset acquisition, purchase price | $ 48.3 |  |  |  |  |
eOne |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Preliminary purchase price consideration |  |  | $ 385.1 |  |  |
Pro forma impairment of goodwill and trade name at eOne |  |  |  |  | $ 296.2 |
eOne | Subsequent Event |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Reduction to purchase price |  |  |  | $ 12.0 |  |
eOne | Film and Television Library | Minimum |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Acquired finite-lived intangible assets, weighted average useful life |  |  | 5 years |  |  |
eOne | Film and Television Library | Maximum |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Acquired finite-lived intangible assets, weighted average useful life |  |  | 10 years |  |  |
eOne | Trade Names |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Acquired finite-lived intangible assets, weighted average useful life |  |  | 5 years |  |  |
CP LG Library Holdings, LLC |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Preliminary purchase price consideration | $ 35.0 |  |  |  |  |
Percentage of voting interests acquired | 51.00% |  |  |  |  |

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