Income Taxes - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Provision for income taxes from continuing operations, percent	22.70%	22.50%	23.70%
Undistributed earnings of foreign subsidiaries	$ 291.1
Deferred tax assets, operating loss carryforwards	46.3	$ 52.0
Valuation allowance	13.4	12.0
Income taxes paid	973.7	677.1	$ 633.8
Unrecognized tax benefits	99.9	62.3	54.2	$ 45.2
Unrecognized tax benefits that would impact effective tax rate	68.5	49.9	43.3
Unrecognized tax benefits, interest on income taxes expense	10.8	1.6	$ 1.9
Unrecognized tax benefits, income tax penalties expense	0.3
Unrecognized tax benefits, interest on income taxes accrued	19.2	8.8
Unrecognized tax benefits, income tax penalties accrued	0.3
Tax settlements future impact potential on earnings maximum	3.0
Max expected cash payment on tax settlements	15.0
Other Assets
Long-term deferred tax assets	48.3	38.8
Foreign Tax Authority
Deferred tax assets, operating loss carryforwards	61.8
Deferred tax assets, operating loss carryforwards, subject to expiration	1.1
Operating loss carry forwards not subject to expiration	60.7
Domestic Tax Authority
Operating loss carryforwards	31.3
State and Local Jurisdiction
Operating loss carryforwards	348.7
Income Taxes Payable
Unrecognized tax benefits, interest on income taxes accrued	$ 3.9	$ 1.0