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Debt (Narrative - Senior Notes) (Details) - Senior Notes - USD ($) $ in Millions	6 Months Ended
	Sep. 30, 2024	May 08, 2024
5.5% Senior Notes
Debt Instrument [Line Items]
Coupon rate	5.50%
Exchange Notes
Debt Instrument [Line Items]
Coupon rate	5.50%	5.50%
Principal amount issued		$ 389.9
Debt instrument, redemption period one \| 5.5% Senior Notes
Debt Instrument [Line Items]
Debt instrument redemption price percentage	102.75%
Debt instrument, redemption period one \| Exchange Notes
Debt Instrument [Line Items]
Debt instrument redemption price percentage	103.00%
Debt instrument, redemption, period two \| 5.5% Senior Notes
Debt Instrument [Line Items]
Debt instrument redemption price percentage	101.375%
Debt instrument, redemption, period two \| Exchange Notes
Debt Instrument [Line Items]
Debt instrument redemption price percentage	102.00%
Debt instrument, redemption, period three \| 5.5% Senior Notes
Debt Instrument [Line Items]
Debt instrument redemption price percentage	100.00%
Debt instrument, redemption, period three \| Exchange Notes
Debt Instrument [Line Items]
Debt instrument redemption price percentage	101.00%
Debt instrument, redemption, period four \| Exchange Notes
Debt Instrument [Line Items]
Debt instrument redemption price percentage	100.00%
Change in Control \| 5.5% Senior Notes
Debt Instrument [Line Items]
Debt instrument redemption price percentage	101.00%
Certain Asset Disposition \| 5.5% Senior Notes
Debt Instrument [Line Items]
Debt instrument redemption price percentage	100.00%