Income Taxes - Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Jun. 30, 2020	Jun. 30, 2019
Classification:
Long-term deferred tax assets (included in Other non-current assets)	$ 2.6	$ 5.5
Long-term deferred tax liabilities	(126.8)	(86.7)
Deferred tax assets:
Accrued expenses not currently deductible	3.1	3.2
Compensation and benefits not currently deductible	59.1	57.6
Net operating and capital losses	16.4	11.1
Tax credits	7.7	7.5
Other	9.1	6.1
Total deferred tax assets	95.5	85.6
Less: Valuation allowances	(6.7)	(3.3)
Deferred tax assets, net	88.8	82.2
Deferred tax liabilities:
Goodwill and identifiable intangibles	112.8	100.9
Depreciation	17.3	10.1
Net deferred expenses	66.5	33.6
Unremitted earnings	9.5	12.2
Other	7.0	6.8
Deferred tax liabilities	213.0	163.5
Net deferred tax liabilities	$ (124.2)	$ (81.3)