Pension and Postretirement Benefit Plans (Schedule of amount recognized in balance sheets) (Details) - USD ($) $ in Millions	Jun. 30, 2018	Jun. 30, 2017
Pension | Domestic
Other assets
Prepaid benefit cost	$ 16.9	$ 16.9
Accrued expenses-compensation and benefits
Accrued benefit liability	(9.9)	(5.8)
Other noncurrent liabilities
Accrued benefit liability	(47.4)	(42.8)
Net amount recognized, end of year	(40.4)	(31.7)
Pension | International
Other assets
Prepaid benefit cost	137.4
Accrued expenses-compensation and benefits
Accrued benefit liability	(0.2)
Other noncurrent liabilities
Accrued benefit liability	(17.2)
Net amount recognized, end of year	120.0
Postretirement
Other assets
Prepaid benefit cost	0.0	0.0
Accrued expenses-compensation and benefits
Accrued benefit liability	(0.6)	(0.7)
Other noncurrent liabilities
Accrued benefit liability	(7.8)	(8.6)
Net amount recognized, end of year	$ (8.4)	$ (9.3)