Leases - Narrative (Details) $ in Millions	12 Months Ended
Mar. 31, 2025 USD ($)
Studio Facility
Lessee, Lease, Description [Line Items]
Lease not yet commenced, liability, payments, due	$ 245.0
Studio Facility \| Lions Gate Entertainment Corp.
Lessee, Lease, Description [Line Items]
Lease not yet commenced, liability, payments, due	$ 245.0
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease term	12 years 3 months
Maximum \| Lions Gate Entertainment Corp.
Lessee, Lease, Description [Line Items]
Remaining lease term	12 years 3 months
Maximum \| Studio Facility
Lessee, Lease, Description [Line Items]
Lease not yet commenced, term of contract	12 years 3 months
Lease not yet commenced, renewal term	12 years
Maximum \| Studio Facility \| Lions Gate Entertainment Corp.
Lessee, Lease, Description [Line Items]
Lease not yet commenced, term of contract	12 years 3 months
Lease not yet commenced, renewal term	12 years
Minimum \| Studio Facility
Lessee, Lease, Description [Line Items]
Lease not yet commenced, renewal term	10 years
Minimum \| Studio Facility \| Lions Gate Entertainment Corp.
Lessee, Lease, Description [Line Items]
Lease not yet commenced, renewal term	10 years

Lessee, Lease, Remaining Lease Term

No definition available.

Name:	lion_LesseeLeaseRemainingLeaseTerm
Namespace Prefix:	lion_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of lessee's undiscounted obligation for lease payments for operating lease not yet commenced.

+ References

No definition available.

+ Details

Name:	lion_LesseeOperatingLeaseLeaseNotYetCommencedLiabilityPaymentsDue
Namespace Prefix:	lion_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 7A
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-7A

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-3

+ Details

Name:	us-gaap_LesseeLeaseDescriptionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Term of lessee's operating lease renewal for lease not yet commenced, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-3

+ Details

Name:	us-gaap_LesseeOperatingLeaseLeaseNotYetCommencedRenewalTerm1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

- Definition

Term of lessee's operating lease not yet commenced, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

+ Details

Name:	us-gaap_LesseeOperatingLeaseLeaseNotYetCommencedTermOfContract1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=lion_StudioFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=lion_LionsGateEntertainmentCorp.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: