Employee Benefit Plans - Defined Benefit Pension Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020
Defined Benefit Plan Disclosure [Line Items]
Rabbi trust assets	$ 55.6	$ 62.6
Benefit expense	6.2	6.1	$ 5.2
Benefit obligation	57.0	65.9	59.8
SORP | Supplemental Employee Retirement Plan
Defined Benefit Plan Disclosure [Line Items]
Benefit expense	5.7	5.6	4.8
Benefit obligation	51.6	59.5	53.8
SERP | Supplemental Employee Retirement Plan
Defined Benefit Plan Disclosure [Line Items]
Benefit expense	0.5	0.5	0.4
Benefit obligation	$ 5.4	$ 6.4	$ 6.0