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Segment Information - Narrative (Details) $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2024 USD ($) SEGMENT Segment | Dec. 31, 2023 USD ($) | Mar. 31, 2024 USD ($) Segment | Mar. 31, 2023 USD ($) | Mar. 31, 2022 USD ($)
Revenues |  |  |  |  | $ 2,986.4 | $ 3,083.8 | $ 2,716.3
Percentage of accounts receivable due from one customer |  |  |  |  |  | 10.50% |
Accounts receivable |  |  |  |  |  | $ 60.0 |
Accounts Receivable, Noncurrent |  |  |  |  | 86.8 |  |
Accounts Receivable, Current |  |  |  |  | $ 100.9 |  |
Percentage of accounts receivable due from two customer, current |  |  |  |  | 12.50% |  |
Percentage of accounts receivable due from two customer, non current |  |  |  |  | 10.80% |  |
Revenue from contract with customers excluding assessed tax | $ 713.8 | $ 691.6 | $ 2,125.8 | $ 2,106.3 | $ 2,986.4 | 3,083.8 | 2,716.3
Account receivable net current | 489.2 |  | $ 489.2 |  | $ 688.6 | 527.0 |
Number of reportable segments |  |  | 2 |  | 2 |  |
Starz Business |  |  |  |  |  |  |
Revenues |  |  |  |  | $ 545.9 | 775.5 | 648.2
Amount due from customer |  |  |  |  | 33.4 | 157.6 |
Motion Picture And Television Production |  |  |  |  |  |  |
Revenue from one individual external customer |  |  |  |  | $ 411.1 | $ 337.1 |
Maximum |  |  |  |  |  |  |
Percentage of total revenue |  |  |  |  | 10.00% |  |
Percentage of accounts receivable due from one customer |  |  |  |  |  | 10.00% |
Percentage of accounts receivable due from two customer |  |  |  |  | 10.00% |  |
Maximum | Motion Picture And Television Production |  |  |  |  |  |  |
Percentage of revenue from one individual external customer |  |  |  |  | 10.00% | 10.00% |
Starz Business of Lions Gate Entertainment Corp |  |  |  |  |  |  |
Revenue from contract with customers excluding assessed tax |  |  | $ 1,039.0 | $ 1,040.0 | $ 1,392.4 | $ 1,422.5 | $ 1,450.7
Account receivable net current | $ 69.5 |  | $ 69.5 |  | $ 52.9 | 18.0 |
Number of reportable segments | Segment |  |  | 1 |  | 1 |  |
Starz Business of Lions Gate Entertainment Corp | Customer One And Two | Customer Concentration Risk | Revenue Benchmark |  |  |  |  |  |  |
Concentation risk percentage |  |  |  |  |  |  | 10.00%
Starz Business of Lions Gate Entertainment Corp | Customer One | Customer Concentration Risk | Revenue Benchmark |  |  |  |  |  |  |
Revenue from contract with customers excluding assessed tax |  |  |  |  | $ 384.2 | 374.1 | $ 348.1
Starz Business of Lions Gate Entertainment Corp | Customer One | Customer Concentration Risk | Accounts Receivable |  |  |  |  |  |  |
Account receivable net current |  |  |  |  | 5.9 | 6.0 |
Starz Business of Lions Gate Entertainment Corp | Customer Two | Customer Concentration Risk | Revenue Benchmark |  |  |  |  |  |  |
Revenue from contract with customers excluding assessed tax |  |  |  |  | 95.6 |  | $ 183.1
Starz Business of Lions Gate Entertainment Corp | Customer Two | Customer Concentration Risk | Accounts Receivable |  |  |  |  |  |  |
Account receivable net current |  |  |  |  | $ 7.1 | $ 3.6 |
Starz Business of Lions Gate Entertainment Corp | Four Customers | Customer Concentration Risk | Accounts Receivable |  |  |  |  |  |  |
Concentation risk percentage |  |  |  |  | 10.00% |  |
Starz Business of Lions Gate Entertainment Corp | Customer Three | Customer Concentration Risk | Accounts Receivable |  |  |  |  |  |  |
Account receivable net current |  |  |  |  | $ 11.3 |  |
Starz Business of Lions Gate Entertainment Corp | Customer Four | Customer Concentration Risk | Accounts Receivable |  |  |  |  |  |  |
Account receivable net current |  |  |  |  | $ 7.3 |  |
Starz Business of Lions Gate Entertainment Corp | Two Customers | Customer Concentration Risk | Accounts Receivable |  |  |  |  |  |  |
Concentation risk percentage |  |  |  |  |  | 10.00% |
Starz Business of Lions Gate Entertainment Corp | Maximum |  |  |  |  |  |  |
Percentage of total revenue |  |  |  |  | 10.00% |  |
Starz Business of Lions Gate Entertainment Corp | Minimum | Customer One And Two | Customer Concentration Risk | Revenue Benchmark |  |  |  |  |  |  |
Concentation risk percentage |  |  |  |  | 10.00% |  |
Starz Business of Lions Gate Entertainment Corp | Minimum | Customer One | Customer Concentration Risk | Revenue Benchmark |  |  |  |  |  |  |
Concentation risk percentage |  |  |  |  |  | 10.00% |

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