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Revenue - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Mar. 31, 2024 | Mar. 31, 2023 | Mar. 31, 2022
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Revenue | $ 823.7 | $ 789.8 | $ 1,412.0 | $ 1,414.9 | $ 2,986.4 | $ 3,083.8 | $ 2,716.3
Starz Business of Lions Gate Entertainment Corp |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Revenue |  |  | 694.5 | 690.8 | 1,392.4 | 1,422.5 | 1,450.7
Television Production |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Revenue | 416.6 | 393.9 | 658.0 | 612.4 | 1,330.1 | 1,760.1 | 1,531.0
Motion Picture |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Revenue | 407.1 | 395.9 | 754.0 | 802.5 | 1,656.3 | 1,323.7 | 1,185.3
Operating Segments |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Revenue |  |  |  |  | 2,986.4 | 3,083.8 | 2,716.3
Operating Segments | Starz Business of Lions Gate Entertainment Corp |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Revenue |  |  | 694.5 | 690.8 | 1,392.4 | 1,422.5 | 1,450.7
Operating Segments | International | Starz Business of Lions Gate Entertainment Corp |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Revenue |  |  | 6.3 | 5.2 | 9.7 | 9.4 | 4.6
Operating Segments | Starz Networks | Starz Business of Lions Gate Entertainment Corp |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Revenue |  |  | 688.2 | 685.6 | 1,382.7 | 1,413.1 | 1,446.1
Operating Segments | Motion Picture Segment |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Revenue |  |  |  |  | 1,656.3 | 1,323.7 | 1,185.3
Operating Segments | Motion Picture Segment | Starz Business |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Revenue | 72.1 | 60.5 |  |  |  |  |
Operating Segments | Motion Picture Segment | Theatrical |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Revenue |  |  |  |  | 226.5 | 120.7 | 65.3
Operating Segments | Motion Picture Segment | Home Entertainment |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Revenue |  |  |  |  | 736.3 | 598.0 | 612.1
Operating Segments | Motion Picture Segment | Home Entertainment | Digital Media |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Revenue |  |  |  |  | 652.3 | 527.5 | 497.1
Operating Segments | Motion Picture Segment | Home Entertainment | Packaged Media |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Revenue |  |  |  |  | 84.0 | 70.5 | 115.0
Operating Segments | Motion Picture Segment | Televison |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Revenue |  |  |  |  | 274.4 | 217.8 | 257.9
Operating Segments | Motion Picture Segment | International |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Revenue |  |  |  |  | 391.0 | 365.0 | 234.4
Operating Segments | Motion Picture Segment | Other |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Revenue |  |  |  |  | 28.1 | 22.2 | 15.6
Operating Segments | Television Production |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Revenue | 416.6 | 393.9 | 658.0 | 612.4 | 1,330.1 | 1,760.1 | 1,531.0
Operating Segments | Television Production | Starz Business |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Revenue | 149.9 | 130.3 | 189.4 | 211.3 |  |  |
Operating Segments | Television Production | Digital Media |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Revenue | 34.3 | 84.2 | 53.2 | 96.0 |  |  |
Operating Segments | Television Production | Packaged Media |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Revenue | 0.5 | 0.3 | 1.3 | 0.7 |  |  |
Operating Segments | Television Production | Television |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Revenue | 313.1 | 221.8 | 473.2 | 371.9 |  |  |
Operating Segments | Television Production | International |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Revenue | 49.7 | 73.6 | 85.5 | 105.6 |  |  |
Operating Segments | Television Production | Other |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Revenue | 19.0 | 14.0 | 44.8 | 38.2 |  |  |
Operating Segments | Television Production | Total Home Entertainment |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Revenue | 34.8 | 84.5 | 54.5 | 96.7 |  |  |
Operating Segments | Television Production | Home Entertainment |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Revenue |  |  |  |  | 242.6 | 245.0 | 92.0
Operating Segments | Television Production | Home Entertainment | Digital Media |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Revenue |  |  |  |  | 240.6 | 241.7 | 85.1
Operating Segments | Television Production | Home Entertainment | Packaged Media |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Revenue |  |  |  |  | 2.0 | 3.3 | 6.9
Operating Segments | Television Production | Televison |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Revenue |  |  |  |  | 788.5 | 1,144.3 | 1,094.5
Operating Segments | Television Production | International |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Revenue |  |  |  |  | 228.8 | 277.7 | 256.5
Operating Segments | Television Production | Other |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Revenue |  |  |  |  | $ 70.2 | $ 93.1 | $ 88.0
Operating Segments | Motion Picture |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Revenue | 407.1 | 395.9 | 754.0 | 802.5 |  |  |
Operating Segments | Motion Picture | Starz Business |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Revenue |  |  | 136.3 | 77.1 |  |  |
Operating Segments | Motion Picture | Digital Media |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Revenue | 114.5 | 165.7 | 254.6 | 339.8 |  |  |
Operating Segments | Motion Picture | Packaged Media |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Revenue | 12.5 | 16.1 | 21.8 | 42.0 |  |  |
Operating Segments | Motion Picture | Theatrical |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Revenue | 20.1 | 28.2 | 56.1 | 94.1 |  |  |
Operating Segments | Motion Picture | Television |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Revenue | 108.7 | 100.8 | 196.7 | 149.3 |  |  |
Operating Segments | Motion Picture | International |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Revenue | 148.0 | 79.7 | 216.0 | 160.7 |  |  |
Operating Segments | Motion Picture | Other |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Revenue | 3.3 | 5.4 | 8.8 | 16.6 |  |  |
Operating Segments | Motion Picture | Total Home Entertainment |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Revenue | $ 127.0 | $ 181.8 | $ 276.4 | $ 381.8 |  |  |

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