Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Income tax (benefit) expense	$ (10.7)	$ 11.7	$ (29.7)	$ 24.6
Income tax expense as a percent of pre-tax income (loss)	11.20%	23.20%	18.40%	23.50%
Goodwill impairment	$ 52.8	$ 0.0	$ 52.8	$ 0.0
Effective income tax rate reconciliation, excluding non-deductible expense, impairment losses, percent	24.80%		27.10%
Tax benefit associated with debt prepayment costs	$ 2.0
Tax benefit related to the impact of restructuring charges	2.4
Tax expense (benefit) attributable to employee share-based compensation	$ 1.2	$ (0.5)
Operating loss carryforward, income tax expense (benefit), CARES act			$ 7.0