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Segment Information (Purchase Accounting and Related Adjustments) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Mar. 31, 2022
Corporate and reconciling items |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Purchase accounting and related adjustments | $ 153.7 | $ 195.5 | $ 194.0
Direct operating | Corporate and reconciling items |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Purchase accounting and related adjustments | 0.0 | 0.7 | 0.4
General and administrative expense |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Purchase accounting and related adjustments | 11.6 | 54.7 |
General and administrative expense | Corporate and reconciling items |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Purchase accounting and related adjustments | 11.6 | 54.7 | 58.7
Amortization of recoupable portion of the purchase price | 1.3 | 7.7 | 7.7
Noncontrolling interest discount amortization | 0.0 | 13.2 | 22.7
Noncontrolling equity interest in distributable earnings | 10.3 | 33.8 | 28.3
Depreciation and amortization expense | Corporate and reconciling items |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Purchase accounting and related adjustments | $ 142.1 | $ 140.1 | $ 134.9

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