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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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