Pension and Postretirement Benefit Plans (Schedule of Amounts Recognized in Balance Sheets) (Details) - USD ($) $ in Millions	Jun. 30, 2021	Jun. 30, 2020
Pension | United States
Other assets
Prepaid benefit cost	$ 26.5	$ 2.3
Accrued expenses-compensation and benefits
Accrued benefit liability	(3.9)	(6.3)
Other noncurrent liabilities
Accrued benefit liability	(39.0)	(40.0)
Net amount recognized, end of year	(16.4)	(44.0)
Pension | International
Other assets
Prepaid benefit cost	144.2	140.9
Accrued expenses-compensation and benefits
Accrued benefit liability	(0.2)	(0.1)
Other noncurrent liabilities
Accrued benefit liability	(7.6)	(7.0)
Net amount recognized, end of year	136.4	133.8
Postretirement
Other assets
Prepaid benefit cost	0.0	0.0
Accrued expenses-compensation and benefits
Accrued benefit liability	(0.5)	(0.6)
Other noncurrent liabilities
Accrued benefit liability	(7.5)	(7.9)
Net amount recognized, end of year	$ (8.0)	$ (8.5)