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Restructuring and Other (Restructuring and Other) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2022 | Mar. 31, 2023 | Mar. 31, 2022 | Mar. 31, 2021
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring and other |  | $ 411.9 | $ 16.8 | $ 24.7
Total restructuring and other and other unusual charges not included in restructuring and other |  | 407.3 | 56.2 | 92.2
Goodwill impairment | $ 1,475.0 | 1,475.0 | 0.0 | 0.0
Insurance recoveries |  | 14.1 | 22.1 |
Minimum |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring initiative, expected cost remaining |  | 20.0 |  |
Restructuring initiative, expected future cash outlay |  | 20.0 |  |
Maximum |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring initiative, expected cost remaining |  | 50.0 |  |
Restructuring initiative, expected future cash outlay |  | 50.0 |  |
Media Networks |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Goodwill impairment |  | 1,475.0 |  |
Media Networks | Media Networks |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Goodwill impairment | $ 1,475.0 |  |  |
Severance |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring and other |  | 22.2 | 4.6 | 18.3
COVID-19 related charges |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring and other |  | 0.1 | 1.1 | 3.0
Transaction and related costs |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring and other |  | 4.4 | 11.1 | 3.4
Content And Other Impairments |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring and other |  | 385.2 | 0.0 | 0.0
Future cash expenditures |  | 90.0 |  |
Operating lease, impairment loss |  | 5.8 |  |
Content And Other Impairments | Media Networks |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring and other |  | 379.3 |  |
Transaction And Other Cost | Media Networks |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Settlement of a legal matter |  | 11.0 |  |
Cash | Severance |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring and other |  | 18.0 | 4.6 | 14.8
Accelerated vesting on equity awards | Severance |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring and other |  | 4.2 | 0.0 | 3.5
Direct operating expense |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Programming and content charges |  | 7.0 | 36.9 | 0.0
COVID-19 related charges (benefit) |  | (11.6) | (3.6) | 50.6
Charges related to Russia's invasion of Ukraine included in direct operating expense |  | 0.0 | 5.9 | 0.0
Distribution and marketing expense |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
COVID-19 related charges (benefit) |  | $ 0.0 | $ 0.2 | $ 16.9

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