Income Taxes - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
Income Tax Examination [Line Items]
Provision for income taxes from continuing operations, percent	23.00%	23.10%	22.50%
Long-term deferred tax assets	$ 916.7	$ 976.1
Undistributed earnings of foreign subsidiaries	53.0
Deferred tax assets, operating loss carryforwards	41.7	37.5
Valuation allowance	11.1	18.6
Income taxes paid	1,185.2	1,080.7	$ 856.8
Unrecognized tax benefits	126.9	116.9	98.1	$ 99.9
Unrecognized tax benefits that would impact effective tax rate	91.8	83.6	68.1
Unrecognized tax benefits, interest on income taxes expense	5.7	9.1	3.5
Unrecognized tax benefits, income tax penalties expense			0.3
Unrecognized tax benefits, interest on income taxes accrued	32.6	30.0
Unrecognized tax benefits, income tax penalties accrued	0.0	0.0	$ 0.3
Other Assets
Income Tax Examination [Line Items]
Long-term deferred tax assets	200.2	$ 331.1
Foreign Tax Authority
Income Tax Examination [Line Items]
Deferred tax assets, operating loss carryforwards	74.0
Deferred tax assets, operating loss carryforwards, subject to expiration	0.9
Operating loss carry forwards not subject to expiration	73.1
Domestic Tax Authority
Income Tax Examination [Line Items]
Operating loss carryforwards	26.5
State and Local Jurisdiction
Income Tax Examination [Line Items]
Operating loss carryforwards	$ 196.8