Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Effective Income Tax Rate Reconciliation, Percent	25.30%	31.50%	33.20%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	28.10%	35.00%	35.00%
Tax Cuts and Jobs Act of 2017 Incomplete Accounting Provisional Income Tax One Time Benefit, Net	$ 1.6
Tax Cuts and Jobs Act of 2017, Incomplete Accounting, Undistributed Accumulated earnings of Foreign Subsidiary, Provisional Unrecognized Deferred Tax Liability	34.5
Accrual On Foreign Withholding Taxes	28.3
Tax Cuts and Jobs Act of 2017, Incomplete Accounting, Change in Tax Rate, Deferred Tax Liability, Provisional Income Tax (Expense) Benefit	68.0
Tax Cuts and Jobs Act of 2017, Incomplete Accounting, Transition Tax for Accumulated Foreign Earnings, Provisional Income Tax Expense (Benefit)	22.9
Long-Term deferred tax assets	90.1	$ 93.4
Undistributed Earnings of Foreign Subsidiaries	300.9
Deferred Tax Assets, Operating Loss Carryforwards	44.6	49.5
Valuation Allowance	46.0	9.4
Income Taxes Paid	529.7	817.1	$ 651.6
Unrecognized Tax Benefits	45.2	74.6	27.4	$ 27.1
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	36.1	61.0	18.7
Unrecognized Tax Benefits, Interest on Income Taxes Expense	3.2	3.0	$ 1.1
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	7.9	6.9
Unrecognized Tax Benefits, Income Tax Penalties Accrued	0.3	0.2
Tax Settlements Future Impact Potential On Earnings Maximum	2.0
Max Expected Cash Payment On Tax Settlements	25.0
Foreign Tax Authority [Member]
Deferred Tax Assets, Operating Loss Carryforwards	62.7
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	$ 4.8
Operating Loss Carryforwards, Expiration Date	Jun. 30, 2026
Operating loss carry forwards not subject to expiration	$ 57.9
Domestic Tax Authority [Member]
Operating Loss Carryforwards	$ 61.7
Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards, Expiration Date	Jun. 30, 2037
State and Local Jurisdiction [Member]
Operating Loss Carryforwards, Expiration Date	Jun. 30, 2037
Operating Loss Carryforwards	$ 255.4
Income Taxes Payable [Member]
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	$ 4.8	$ 0.1