Financial Instruments - Interest Rate Swaps (Details) - Designated as Hedging Instrument - Interest rate swaps - USD ($) $ in Millions	Mar. 31, 2025	Mar. 31, 2024
Derivative [Line Items]
Notional Amount	$ 727.8	$ 1,700.0
Lions Gate Entertainment Corp.
Derivative [Line Items]
Notional Amount	$ 727.8	1,700.0
Interest Rate Swap, Fixed Rate Paid 2.915%, Effective Date May 23, 2018
Derivative [Line Items]
Notional Amount		$ 300.0
Fixed rate paid (as percent)		2.915%
Interest Rate Swap, Fixed Rate Paid 2.915%, Effective Date May 23, 2018 | Lions Gate Entertainment Corp.
Derivative [Line Items]
Notional Amount		$ 300.0
Fixed rate paid (as percent)		2.915%
Interest Rate Swap 2, Fixed Rate Paid 2.915%, Effective Date May 23, 2018
Derivative [Line Items]
Notional Amount		$ 700.0
Fixed rate paid (as percent)		2.915%
Interest Rate Swap 2, Fixed Rate Paid 2.915%, Effective Date May 23, 2018 | Lions Gate Entertainment Corp.
Derivative [Line Items]
Notional Amount		$ 700.0
Fixed rate paid (as percent)		2.915%
Interest Rate Swap, Fixed Rate Paid 2.723%, Effective Date June 25, 2018
Derivative [Line Items]
Notional Amount		$ 200.0
Fixed rate paid (as percent)		2.723%
Interest Rate Swap, Fixed Rate Paid 2.723%, Effective Date June 25, 2018 | Lions Gate Entertainment Corp.
Derivative [Line Items]
Notional Amount		$ 200.0
Fixed rate paid (as percent)		2.723%
Interest Rate Swap, Fixed Rate Paid 2.885%, Effective Date July 31, 2018
Derivative [Line Items]
Notional Amount		$ 300.0
Fixed rate paid (as percent)		2.885%
Interest Rate Swap, Fixed Rate Paid 2.885%, Effective Date July 31, 2018 | Lions Gate Entertainment Corp.
Derivative [Line Items]
Notional Amount		$ 300.0
Fixed rate paid (as percent)		2.885%
Interest Rate Swap, Fixed Rate Paid 2.744%, Effective Date December 24, 2018
Derivative [Line Items]
Notional Amount		$ 50.0
Fixed rate paid (as percent)		2.744%
Interest Rate Swap, Fixed Rate Paid 2.744%, Effective Date December 24, 2018 | Lions Gate Entertainment Corp.
Derivative [Line Items]
Notional Amount		$ 50.0
Fixed rate paid (as percent)		2.744%
Interest Rate Swap, Fixed Rate Paid 2.808%, Effective Date December 24, 2018
Derivative [Line Items]
Notional Amount		$ 100.0
Fixed rate paid (as percent)		2.808%
Interest Rate Swap, Fixed Rate Paid 2.808%, Effective Date December 24, 2018 | Lions Gate Entertainment Corp.
Derivative [Line Items]
Notional Amount		$ 100.0
Fixed rate paid (as percent)		2.808%
Interest Rate Swap, Fixed Rate Paid 2.728%, Effective Date December 24, 2018
Derivative [Line Items]
Notional Amount		$ 50.0
Fixed rate paid (as percent)		2.728%
Interest Rate Swap, Fixed Rate Paid 2.728%, Effective Date December 24, 2018 | Lions Gate Entertainment Corp.
Derivative [Line Items]
Notional Amount		$ 50.0
Fixed rate paid (as percent)		2.728%