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Segment Information (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Concentration Risk [Line Items]
Revenues	$ 4,016.9	$ 3,854.8	$ 3,604.3
Customer Concentration Risk | Sales Revenue, Net | One Customer
Concentration Risk [Line Items]
Revenues	$ 831.0	$ 766.6	$ 639.2
Percentage of consolidated gross accounts receivable attributable to customer over threshold	10.00%	10.00%	10.00%
Customer Concentration Risk | Accounts Receivable | One Customer
Concentration Risk [Line Items]
Percentage of consolidated gross accounts receivable attributable to customer over threshold	11.60%
Accounts Receivable, after Allowance for Credit Loss	$ 100.9

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