Employee Benefit Plans - Defined Benefit Pension Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Defined Benefit Plan Disclosure [Line Items]
Rabbi trust assets	$ 61.8	$ 57.8
Benefit expense	3.7	3.8	$ 6.2
Benefit obligation	61.6	58.6	57.0
SORP \| Supplemental Employee Retirement Plan
Defined Benefit Plan Disclosure [Line Items]
Benefit expense	3.5	3.4	5.7
Benefit obligation	56.4	53.4	51.6
SERP \| Supplemental Employee Retirement Plan
Defined Benefit Plan Disclosure [Line Items]
Benefit expense	0.3	0.4	0.5
Benefit obligation	$ 5.2	$ 5.2	$ 5.4

Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.