Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), foreign currency translation adjustments	$ (130.5)	$ (96.2)	$ (2.1)	$ (29.1)
Accumulated other comprehensive income (loss), unrealized gain (loss) on derivative instruments	(5.5)	0.3	4.2	(0.9)
Accumulated other comprehensive income (loss)	(136.0)	(95.9)	2.1	$ (30.0)
Other comprehensive income before reclassifications	(44.9)	(108.4)	33.4
Other comprehensive income (loss), unrealized gain (loss) on derivative instruments	(5.8)	(3.9)	5.1
Other comprehensive income (loss)	(40.1)	(98.0)	32.1
Amounts reclassified from accumulated other comprehensive income to earnings, net of tax	4.8	10.4	(1.3)
Foreign currency translation adjustment	(34.3)	(94.1)	27.0
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income before reclassifications	(34.3)	(94.1)	27.0
Amounts reclassified from accumulated other comprehensive income to earnings, net of tax	0.0	0.0	0.0
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income before reclassifications	(10.6)	(14.3)	6.4
Amounts reclassified from accumulated other comprehensive income to earnings, net of tax	4.8	$ 10.4	$ (1.3)
United Kingdom, Pounds
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation adjustment	$ 16.7
Foreign Currency Exchange Rate Change, Percentage	(16.20%)
India, Rupees
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation adjustment	$ 4.2
Foreign Currency Exchange Rate Change, Percentage	(6.30%)
South Africa, Rand
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation adjustment	$ 2.2
Foreign Currency Exchange Rate Change, Percentage	(23.00%)
Japan, Yen
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation adjustment	$ (4.7)