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Segment Information (Purchase Accounting and Related Adjustments) (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Corporate and reconciling items
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Purchase accounting and related adjustments	$ 39.7	$ 44.4
General and administrative expense
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Purchase accounting and related adjustments	2.1	10.0
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	2.1	10.0
Amortization of recoupable portion of the purchase price	0.0	1.3
Noncontrolling equity interest in distributable earnings	2.1	8.7
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	$ 37.6	$ 34.4

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- Definition

Purchase Accounting and Related Adjustments, Amortization of Purchase Price

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- Definition

Purchase Accounting and Related Adjustments, Noncontrolling Interest, Equity Interest in Distributable Earnings

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- Definition

The amortization of non-cash fair value adjustments to the assets and liabilities acquired in the acquisition of businesses.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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