Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Foreign currency translation adjustments:
Derivatives used in Net Investment Hedge, Increase (Decrease), Gross of Tax	$ 13.6	$ 2.5	$ 10.0	$ 2.5
Long-term intercompany loans	(13.3)	(5.6)	(20.9)	(19.8)
Translation Adjustment Functional to Reporting Currency, Increase (Decrease), Gross of Tax	(59.8)	(20.0)	(49.2)	(48.2)
Total foreign currency translation adjustment, pretax	(59.5)	(23.1)	(60.1)	(65.5)
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	4.9	0.9	3.7	0.9
Total foreign currency translation adjustment, net of tax	(64.4)	(24.0)	(63.8)	(66.4)
Net change in minimum pension liability
Other Comprehensive (Income) Loss, Amortization Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Prior Service Cost (Credit), before Tax	1.0	0.7	2.1	1.4
Total pension, pretax	1.0	0.7	2.1	1.4
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Tax	0.3	0.2	0.6	0.4
Net change in minimum pension liability, net of tax	0.7	0.5	1.5	1.0
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax	24.5	0.0	24.5	0.0
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Tax	24.5	0.0	24.5	0.0
Other Comprehensive Income (Loss), Available-for-sale Securities, Tax	9.2	0.0	9.2	0.0
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	$ 15.3	$ 0.0	$ 15.3	$ 0.0