Equity and Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Earnings/(Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (386.3)	$ (353.9)	$ (325.8)	$ (314.1)
Other comprehensive income /(loss), net of tax	(32.4)	(28.1)	(11.7)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax	(1.6)	9.5	(4.3)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(31.4)	(18.6)	(4.4)
Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, after Tax	0.0	0.0	(11.6)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(335.1)	(303.7)	(285.1)	(280.7)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(31.4)	(18.6)	(4.4)
Available for Sale Investments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(1.1)	(1.1)	(1.1)	10.5
Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, after Tax	0.0	0.0	(11.6)
Accumulated Cash Flow Hedge [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(2.6)	0.0	0.0	0.0
Other comprehensive income /(loss), net of tax	(2.6)	0.0	0.0
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(47.5)	(49.1)	(39.6)	$ (43.9)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax	$ (1.6)	$ 9.5	$ (4.3)