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Restructuring and Other (Restructuring and Other) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Restructuring Cost and Reserve [Line Items]
Restructuring and other	$ 233.2	$ 3.5	$ 241.3	$ 6.7
Total restructuring and other and other unusual charges not included in restructuring and other	234.3	2.7	241.4	7.5
Insurance recoveries	$ 6.9	2.8	7.9	8.7
Minimum
Restructuring Cost and Reserve [Line Items]
Restructuring initiative, estimated period to incur expected cost remaining	6 months
Restructuring initiative, expected cost remaining	$ 75.0		75.0
Maximum
Restructuring Cost and Reserve [Line Items]
Restructuring initiative, expected cost remaining	100.0		100.0
Direct operating expense
Restructuring Cost and Reserve [Line Items]
Content charges	7.2	0.0	7.2	0.0
Direct operating expense	(6.1)	(1.0)	(7.1)	0.5
Distribution and marketing
Restructuring Cost and Reserve [Line Items]
Distribution and marketing expense	0.0	0.2	0.0	0.3
Severance
Restructuring Cost and Reserve [Line Items]
Restructuring and other	9.6	1.3	13.0	3.8
Severance | Motion Picture
Restructuring Cost and Reserve [Line Items]
Restructuring and other	3.7
Severance | Media Networks
Restructuring Cost and Reserve [Line Items]
Restructuring and other	5.9
Severance | Cash
Restructuring Cost and Reserve [Line Items]
Restructuring and other	9.6	1.3	12.4	3.8
Severance | Accelerated vesting on equity awards
Restructuring Cost and Reserve [Line Items]
Restructuring and other	0.0	0.0	0.6	0.0
COVID-19 related charges
Restructuring Cost and Reserve [Line Items]
Restructuring and other	0.0	0.5	0.1	0.8
Transaction and related costs
Restructuring Cost and Reserve [Line Items]
Restructuring and other	4.8	1.7	9.4	2.1
Content and other impairments
Restructuring Cost and Reserve [Line Items]
Restructuring and other	218.8	$ 0.0	218.8	$ 0.0
Future cash expenditures	75.0
Operating Lease, Impairment Loss	5.8		$ 5.8
Content and other impairments | Media Networks
Restructuring Cost and Reserve [Line Items]
Restructuring and other	$ 213.0

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