Capital Stock - Schedule of Stock Option, SARs, Restricted Stock and Restricted Share Unit Activity (Details) shares in Millions	3 Months Ended
Jun. 30, 2024 $ / shares shares
Lions Gate Class A Voting Shares \| Stock Options and SARs
Number of Shares
Number of Shares, beginning balance	2.4
Granted (in shares)	0.0
Options exercised (in shares)	0.0
Forfeited or expired (in shares)	0.0
Number of Shares, ending balance	2.4
Weighted-Average Exercise Price
Outstanding, weighted average exercise price (in USD per share), beginning Balance \| $ / shares	$ 22.96
Granted, weighted average exercise price (in USD per share) \| $ / shares	0
Options exercised, weighted average exercise price (in USD per share) \| $ / shares	0
Forfeited or expired, weighted average exercise price (in USD per share) \| $ / shares	11.71
Outstanding, weighted average exercise price (in USD per share), ending balance \| $ / shares	$ 23
Lions Gate Class A Voting Shares \| Stock Options and SARs \| Maximum
Number of Shares
Forfeited or expired (in shares)	(0.1)
Lions Gate Class A Voting Shares \| Restricted Stock and Restricted Share Units (RSUs)
Number of Shares
Outstanding (in shares), beginning balance	0.1
Granted (in shares)	0.0
Vested (in shares)	0.0
Forfeited or expired (in shares)	0.0
Outstanding (in shares), ending balance	0.1
Weighted-Average Grant-Date Fair Value
Outstanding, weighted average grant-date fair value (in USD per share), beginning balance \| $ / shares	$ 9.27
Granted, weighted average grant date fair value (in USD per share) \| $ / shares	0
Restricted stock or RSUs vested, weighted average grant-date fair value (in USD per share) \| $ / shares	0
Forfeited or expired, weighted average grant-date fair value (in USD per share) \| $ / shares	0
Outstanding, weighted average grant-date fair value (in USD per share), ending balance \| $ / shares	$ 9.27
Lions Gate Class B Non-Voting Shares \| Stock Options and SARs
Number of Shares
Number of Shares, beginning balance	17.1
Granted (in shares)	0.0
Options exercised (in shares)	0.0
Forfeited or expired (in shares)	(2.0)
Number of Shares, ending balance	15.1
Weighted-Average Exercise Price
Outstanding, weighted average exercise price (in USD per share), beginning Balance \| $ / shares	$ 13.92
Granted, weighted average exercise price (in USD per share) \| $ / shares	0
Options exercised, weighted average exercise price (in USD per share) \| $ / shares	7.13
Forfeited or expired, weighted average exercise price (in USD per share) \| $ / shares	14.55
Outstanding, weighted average exercise price (in USD per share), ending balance \| $ / shares	$ 13.84
Lions Gate Class B Non-Voting Shares \| Restricted Stock and Restricted Share Units (RSUs)
Number of Shares
Outstanding (in shares), beginning balance	9.8
Granted (in shares)	0.2
Vested (in shares)	(0.6)
Forfeited or expired (in shares)	(0.1)
Outstanding (in shares), ending balance	9.3
Weighted-Average Grant-Date Fair Value
Outstanding, weighted average grant-date fair value (in USD per share), beginning balance \| $ / shares	$ 8.93
Granted, weighted average grant date fair value (in USD per share) \| $ / shares	7.95
Restricted stock or RSUs vested, weighted average grant-date fair value (in USD per share) \| $ / shares	9.17
Forfeited or expired, weighted average grant-date fair value (in USD per share) \| $ / shares	8.73
Outstanding, weighted average grant-date fair value (in USD per share), ending balance \| $ / shares	$ 8.7

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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- Definition

For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 718
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Weighted average price of options that were either forfeited or expired.

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Gross number of share options (or share units) granted during the period.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Number of share options (or share units) exercised during the current period.

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