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Goodwill and Intangible Assets (Goodwill) (Details) - USD ($) $ in Millions | 9 Months Ended |
--- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Mar. 31, 2024
Goodwill [Roll Forward] |  |  |
Goodwill, balance at beginning of period | $ 811.2 |  |
Measurement period adjustments | (2.7) |  |
Goodwill, balance at end of period | 808.5 |  |
Adjustment to purchase price from settlement of certain working capital items | 12.0 | $ 0.0 |
eOne |  |  |
Goodwill [Roll Forward] |  |  |
Measurement period adjustments | 2.7 |  |
Goodwill, balance at end of period | 12.9 |  |
Decrease to accounts receivable | 5.6 |  |
Decrease in investment in films and television programs | 1.6 |  |
Increase to content related payables | 3.4 |  |
Increase to participation and residuals | 1.0 |  |
Increase to other liabilities | 1.9 |  |
Increase to other assets | 4.2 |  |
Motion Picture |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill, balance at beginning of period | 398.6 |  |
Measurement period adjustments | (1.7) |  |
Goodwill, balance at end of period | 396.9 |  |
Television Production |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill, balance at beginning of period | 412.6 |  |
Measurement period adjustments | (1.0) |  |
Goodwill, balance at end of period | 411.6 |  |
Media Networks |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill, balance at beginning of period | 0.0 |  |
Measurement period adjustments | 0.0 |  |
Goodwill, balance at end of period | 0.0 |  |
Accumulated goodwill impairment losses | $ 1,969.0 |  | $ 1,969.0

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