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Commitments and Contingencies (Narrative) (Details) $ in Millions |  | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Oct. 09, 2018 USD ($) | Aug. 30, 2016 classActionComplaint | Mar. 31, 2022 USD ($) | Mar. 31, 2021 USD ($) | Mar. 31, 2020 USD ($) | Mar. 31, 2019 USD ($) | Nov. 05, 2018 USD ($)
Other Commitments [Line Items] |  |  |  |  |  |  |
Redeemable noncontrolling interest |  |  | $ 321.2 | $ 219.1 | $ 167.8 | $ 127.6 |
Multiemployer benefit plans, funded status |  |  | At least 80 percent |  |  |  |
Multiemployer Plan, Pension, Insignificant, Employer Contribution, Cost |  |  | $ 98.3 | $ 73.8 | $ 55.5 |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Contingencies, putative class action complaints filed, number | classActionComplaint |  | 7 |  |  |  |  |
Motion Picture Industry Pension Plan |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |
Multiemployer benefit plans, funded percentage |  |  | 68.90% |  |  |  |
Screen Actors Guild - Producers Pension Plan |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |
Multiemployer benefit plans, funded percentage |  |  | 74.70% |  |  |  |
Fiduciary Litigation |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Settlement payment amount | $ 92.5 |  |  |  |  |  |
Insurance reimbursement, amount | $ 37.8 |  |  |  |  |  |
Insurance Litigation |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Lawsuit for insurance reimbursement, amount |  |  |  |  |  |  | $ 10.0
Net settlement amount |  |  | $ 22.7 |  |  |  |

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