Accumulated Other Comprehensive Income (Loss)-Rollforward (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	$ (304.3)		$ (305.7)
Other comprehensive income/(loss) before reclassifications	(49.1)		(48.5)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	0.7		1.5
Net current period other comprehensive income (loss)	(48.4)	$ (23.0)	(47.0)	$ (65.6)
Ending Balance	(352.7)		(352.7)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(248.2)		(248.8)
Other comprehensive income/(loss) before reclassifications	(64.4)		(63.8)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	0.0		0.0
Net current period other comprehensive income (loss)	(64.4)		(63.8)
Ending Balance	(312.6)		(312.6)
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(56.1)		(56.9)
Other comprehensive income/(loss) before reclassifications	0.0		0.0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	0.7		1.5
Net current period other comprehensive income (loss)	0.7		1.5
Ending Balance	(55.4)		(55.4)
Available-for-sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	0.0		0.0
Other comprehensive income/(loss) before reclassifications	15.3		15.3
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	0.0		0.0
Net current period other comprehensive income (loss)	15.3		15.3
Ending Balance	$ 15.3		$ 15.3