Segment Information - Schedule of Reconciliation of Segment General and Administrative Expense to Consolidated (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting, Other Significant Reconciling Item [Line Items]
Segment general and administrative expenses	$ 36.9	$ 40.6	$ 122.9	$ 123.7
General and administration	82.4	86.0	259.4	261.6
Operating Segments
Segment Reporting, Other Significant Reconciling Item [Line Items]
Segment general and administrative expenses	36.9	40.6	122.9	123.7
Corporate
Segment Reporting, Other Significant Reconciling Item [Line Items]
Corporate general and administrative expenses	28.4	25.2	87.6	76.2
Corporate and Reconciling Items
Segment Reporting, Other Significant Reconciling Item [Line Items]
Purchase accounting and related adjustments	3.8	4.2	9.8	19.4
General and Administrative Expense
Segment Reporting, Other Significant Reconciling Item [Line Items]
Purchase accounting and related adjustments	2.8	3.0	6.7	15.4
General and Administrative Expense | Corporate and Reconciling Items
Segment Reporting, Other Significant Reconciling Item [Line Items]
Share-based compensation expense included in general and administrative expense	14.3	17.2	42.2	46.3
Purchase accounting and related adjustments	$ 2.8	$ 3.0	$ 6.7	$ 15.4