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Goodwill and Intangible Assets (Goodwill) (Details) - USD ($) $ in Millions | 6 Months Ended |
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Mar. 31, 2024
Goodwill [Roll Forward] |  |  |
Goodwill, balance at beginning of period | $ 811.2 |  |
Measurement period adjustments | (4.7) |  |
Goodwill, balance at end of period | 806.5 |  |
Net proceeds from purchase price adjustments for eOne acquisition (see Note 2) | 12.0 | $ 0.0 |
eOne |  |  |
Goodwill [Roll Forward] |  |  |
Measurement period adjustments | 4.7 |  |
Goodwill, balance at end of period | (10.9) |  |
Decrease to accounts receivable | 4.6 |  |
Decrease in investment in films and television programs | 1.6 |  |
Increase to content related payables | 3.4 |  |
Increase to participation and residuals | 0.4 |  |
Increase to other liabilities | 0.2 |  |
Increase to other assets | 2.9 |  |
Motion Picture |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill, balance at beginning of period | 398.6 |  |
Measurement period adjustments | (2.2) |  |
Goodwill, balance at end of period | 396.4 |  |
Television Production |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill, balance at beginning of period | 412.6 |  |
Measurement period adjustments | (2.5) |  |
Goodwill, balance at end of period | 410.1 |  |
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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