Accumulated Other Comprehensive Income (Loss)-Rollforward (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	$ (314.1)
Other comprehensive income/(loss) before reclassifications	34.7
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	0.4
Net current period other comprehensive income (loss)	35.1	$ 1.4
Ending Balance	(279.0)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(280.7)
Other comprehensive income/(loss) before reclassifications	38.1
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	0.0
Net current period other comprehensive income (loss)	38.1
Ending Balance	(242.6)
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(43.9)
Other comprehensive income/(loss) before reclassifications	0.0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	0.4
Net current period other comprehensive income (loss)	0.4
Ending Balance	(43.5)
Available-for-sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	10.5
Other comprehensive income/(loss) before reclassifications	(3.4)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	0.0
Net current period other comprehensive income (loss)	(3.4)
Ending Balance	$ 7.1