Benefit And Retirement Plans (Narrative) (Details) $ in Millions	1 Months Ended	3 Months Ended	12 Months Ended
	Aug. 31, 2018 USD ($) employee	Mar. 31, 2019 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)
Benefit And Retirement Plans [Abstract]
Total pension and retirement plan expense			$ 2.7	$ 2.8	$ 2.3
Company's matching contribution to retirement savings plans			2.6	1.7	0.8
Cumulative cost to exit multi-employer plans			18.0
Assets for Plan Benefits, Defined Benefit Plan				0.5
Accumulated benefit obligation			0.0	8.1
Pension plan expense			$ 0.0	$ 0.2	$ 0.2
Total distribution from the plan	$ 8.9
Number of participants who received distributions | employee	362
Amount used to purchase annuities, defined benefit plans	$ 6.5
Number of participants, annuities purchased from | employee	261
Additional amount paid out as lump sum, defined benefit plan	$ 2.5
Pre-tax pension expense		$ 2.5