Employee Retirement Benefit Plans-Accumulated Benefit Obligation (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Employer contributions between measurement date and reporting date
Fair value of plan assets at beginning of year	$ 227.6
Fair value of plan assets at end of year	244.6	$ 227.6
Retirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Amortization of Gains (Losses)	4.4	2.9
Accumulated Benefit Obligation			$ 322.4	$ 328.1
Change in Benefit Obligation
Benefit obligation at beginning of year	336.6	323.7
Company service cost	3.2	2.8
Interest cost	6.6	10.4
Employee contributions	0.0	0.0
Plan amendments	0.0	(0.7)
Curtailments	0.0	0.0
Settlements	0.0	0.0
Special termination benefits	0.0	0.0
Divestitures	0.0	0.0
Other	5.5	0.0
Benefits paid	(11.0)	(11.6)
Actual expenses	0.0	0.0
Actuarial (gain)/loss	(6.4)	40.5
Exchange rate gain/(loss)	(3.9)	(28.5)
Benefit obligation at end of year	330.6	336.6
Employer contributions between measurement date and reporting date
Fair value of plan assets at beginning of year	227.6	222.0
Actual return on plan assets	18.4	33.8
Company contributions	10.6	9.2
Employee contributions	0.0	0.0
Settlements	0.0	0.0
Special company contributions to fund termination benefits	0.0	0.0
Divestitures	0.0	0.0
Other	4.5	0.0
Defined benefit plan, benefits paid, plan asset	(11.0)	(11.6)
Actual expenses	0.0	0.0
Exchange rate gain/(loss)	(5.5)	(25.8)
Fair value of plan assets at end of year	244.6	227.6
Funded status at end of year	(86.0)	(109.0)
Employer contributions between measurement date and reporting date			0.0	0.0
Net Pension assets (liabilities)	(86.0)	(109.0)	(86.0)	(109.0)
Other Post-Retirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Amortization of Gains (Losses)	(0.2)	(0.1)
Accumulated Benefit Obligation			2.8	3.6
Change in Benefit Obligation
Benefit obligation at beginning of year	3.6	3.7
Company service cost	0.0	0.0
Interest cost	0.1	0.1
Employee contributions	0.0	0.0
Plan amendments	0.0	0.0
Curtailments	0.0	0.0
Settlements	0.0	0.0
Special termination benefits	0.0	0.0
Divestitures	0.0	0.0
Other	0.0	0.0
Benefits paid	(0.8)	(0.2)
Actual expenses	0.0	0.0
Actuarial (gain)/loss	(0.1)	0.0
Exchange rate gain/(loss)	0.0	0.0
Benefit obligation at end of year	2.8	3.6
Employer contributions between measurement date and reporting date
Fair value of plan assets at beginning of year	0.0	0.0
Actual return on plan assets	0.0	0.0
Company contributions	0.7	0.2
Employee contributions	0.0	0.0
Settlements	0.0	0.0
Special company contributions to fund termination benefits	0.0	0.0
Divestitures	0.0	0.0
Other	0.0	0.0
Defined benefit plan, benefits paid, plan asset	(0.7)	(0.2)
Actual expenses	0.0	0.0
Exchange rate gain/(loss)	0.0	0.0
Fair value of plan assets at end of year	0.0	0.0
Funded status at end of year	(2.8)	(3.6)
Employer contributions between measurement date and reporting date			0.0	0.0
Net Pension assets (liabilities)	$ (2.8)	$ (3.6)	$ (2.8)	$ (3.6)