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Share-Based Compensation - Summary Of Weighted Average Grant-Date Fair Value Of Options Granted (Details) - Two Thousand And Nineteen Lions Gate Plan - Share-Based Payment Arrangement, Option - $ / shares
12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Mar. 31, 2022
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]      
Weighted average fair value of grants $ 4.63 $ 4.56 $ 6.16
Weighted average assumptions:      
Risk-free interest rate minimum 4.30% 2.80% 1.10%
Risk-free interest rate maximum 4.50% 3.70% 2.45%
Expected volatility for options   44.00%  
Expected volatility for options minimum 46.00%   42.00%
Expected volatility for options maximum 47.00%   44.00%
Expected dividend yield 0.00% 0.00% 0.00%
Starz Business of Lions Gate Entertainment Corp      
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]      
Weighted average fair value of grants $ 8.16    
Weighted average assumptions:      
Risk-free interest rate minimum 0.80%    
Expected option lives (in years) 3 years 6 months    
Expected volatility for options 42.00%    
Expected dividend yield 0.00%    
Maximum      
Weighted average assumptions:      
Expected option lives (in years) 3 years 3 months 18 days 3 years 6 months 3 years 3 months 18 days
Minimum      
Weighted average assumptions:      
Expected option lives (in years) 7 years 7 years 7 years