Debt - Intercompany Note and Intercompany Revolver - Narrative (Details) $ in Millions			12 Months Ended
	May 06, 2025 USD ($)	May 13, 2024 USD ($)	Mar. 31, 2025 USD ($) increase	May 08, 2024 USD ($)	Mar. 31, 2024 USD ($)
Debt Instrument [Line Items]
Total corporate debt			$ 1,697.8		$ 1,793.5
Revolving Credit Facility | Lions Gate Television Inc. | Minimum
Debt Instrument [Line Items]
Commitment fee (as percent)			0.25%
Revolving Credit Facility | Lions Gate Television Inc. | Maximum
Debt Instrument [Line Items]
Commitment fee (as percent)			0.375%
Intercompany Revolver(1) | Revolving Credit Facility
Debt Instrument [Line Items]
Total corporate debt			$ 81.6		0.0
Intercompany Revolver(1) | Revolving Credit Facility | Lions Gate Television Inc.
Debt Instrument [Line Items]
Revolving credit facility, maximum borrowing capacity		$ 150.0
Intercompany Revolver(1) | Revolving Credit Facility | Lions Gate Television Inc. | SOFR
Debt Instrument [Line Items]
Basis spread on variable interest rate (as percent)		1.75%
LGTV Revolver | Revolving Credit Facility
Debt Instrument [Line Items]
Total corporate debt			0.0		575.0
LGTV Revolver | Revolving Credit Facility | Lions Gate Television Inc.
Debt Instrument [Line Items]
Revolving credit facility, maximum borrowing capacity			1,100.0
Credit facility, available amount			1,100.0
LGTV Term Loan A | Revolving Credit Facility
Debt Instrument [Line Items]
Total corporate debt			$ 314.4
LGTV Term Loan A | Revolving Credit Facility | Lions Gate Television Inc.
Debt Instrument [Line Items]
Number of possible increases in margin | increase			2
Effective interest rate (as percent)			6.17%
LGTV Term Loan A | Revolving Credit Facility | Lions Gate Television Inc. | SOFR
Debt Instrument [Line Items]
Basis spread on variable interest rate (as percent)			0.10%
LGTV Term Loan A | Revolving Credit Facility | Lions Gate Television Inc. | SOFR | Minimum
Debt Instrument [Line Items]
Coupon rate (as percent)			0.00%
LGTV Term Loan A | Revolving Credit Facility | Lions Gate Television Inc. | Applicable Margin
Debt Instrument [Line Items]
Basis spread on variable interest rate (as percent)			1.75%
LGTV Term Loan A | Revolving Credit Facility | Lions Gate Television Inc. | Base Rate
Debt Instrument [Line Items]
Basis spread on variable interest rate (as percent)			0.75%
LGTV Term Loan A | Revolving Credit Facility | Lions Gate Television Inc. | LIBOR
Debt Instrument [Line Items]
Potential increases in interest rate upon certain increases to leverage ratios, total			0.50%
Potential increase in interest rate upon certain increases to leverage ratios, per increase			0.25%
LGTV Term Loan A | Term Loans
Debt Instrument [Line Items]
Total corporate debt			$ 314.4		399.3
LGTV Term Loan A | Term Loans | Lions Gate Television Inc.
Debt Instrument [Line Items]
Total corporate debt				$ 399.3
Quarterly principal payment (as percent)			1.75%
Quarterly principal payment percent, year two			2.50%
LGTV Term Loan B | Term Loans
Debt Instrument [Line Items]
Total corporate debt			$ 0.0		$ 819.2
LGTV Term Loan B | Term Loans | Lions Gate Television Inc.
Debt Instrument [Line Items]
Total corporate debt				$ 819.2
LGTV Term Loan B | Term Loans | Lions Gate Television Inc. | SOFR
Debt Instrument [Line Items]
Basis spread on variable interest rate (as percent)			0.10%
LGTV Term Loan B | Term Loans | Lions Gate Television Inc. | SOFR | Minimum
Debt Instrument [Line Items]
Coupon rate (as percent)			0.00%
LGTV Term Loan B | Term Loans | Lions Gate Television Inc. | Applicable Margin
Debt Instrument [Line Items]
Basis spread on variable interest rate (as percent)			2.25%
LGTV Term Loan B | Term Loans | Lions Gate Television Inc. | Base Rate
Debt Instrument [Line Items]
Basis spread on variable interest rate (as percent)			1.25%
New Lionsgate Credit Agreement | Revolving Credit Facility | Subsequent Event
Debt Instrument [Line Items]
Revolving credit facility, maximum borrowing capacity	$ 1,200.0
Commitment fee (as percent)	0.375%
New Lionsgate Credit Agreement | Revolving Credit Facility | SOFR | Subsequent Event
Debt Instrument [Line Items]
Basis spread on variable interest rate (as percent)	2.50%
New Lionsgate Credit Agreement | Revolving Credit Facility | Base Rate | Subsequent Event
Debt Instrument [Line Items]
Basis spread on variable interest rate (as percent)	1.50%
Coupon rate (as percent)	0.00%