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Acquisitions (Narrative) (Details) $ / shares in Units, $ in Millions |  |  |  | 9 Months Ended |
--- | --- | --- | --- | --- | ---
Jun. 05, 2024 USD ($) film | May 13, 2024 USD ($) $ / shares shares | Dec. 27, 2023 | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Mar. 31, 2024 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |  |
Number of films, acquired | film |  | 46 |  |  |  |  |
Gain (loss) recognized upon initial consolidation |  |  |  |  | $ 0.0 |  |
Total assets |  |  |  |  | 7,167.3 |  | $ 7,092.7
Total liabilities |  |  |  |  | 7,323.7 |  | $ 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 |  |  |  |  | 278.2 |  |
Sale of noncontrolling interest in Lionsgate Studios Corp. (see Note 2) |  |  |  |  | (278.2) |  |
Variable Interest Entity, Primary Beneficiary |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Total assets |  |  |  |  | 72.6 |  |
Total liabilities |  |  |  |  | 12.3 |  |
Accumulated other comprehensive income |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Sale of noncontrolling interest in Lionsgate Studios Corp. (see Note 2) |  |  |  |  | 11.3 |  |
Noncontrolling Interests |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Sale of noncontrolling interest in Lionsgate Studios Corp. (see Note 2) | [1] |  |  |  | 100.2 |  |
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] |  |  |  |  |  |  |
Purchase price consideration |  |  |  |  | $ 373.1 |  |
Pro forma impairment of goodwill and trade name at eOne |  |  |  |  |  | $ 296.2 |
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] |  |  |  |  |  |  |
Purchase price consideration |  | $ 35.0 |  |  |  |  |
Percentage of voting interests acquired |  | 51.00% |  |  |  |  |
[1] | Excludes redeemable noncontrolling interests, which are reflected in temporary equity (see Note 9).

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