Fair Value Measurements Unobservable Input (Details) - USD ($) $ in Millions			3 Months Ended		12 Months Ended
	Jun. 30, 2016	Feb. 10, 2016	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Combination, Expected Contingent Consideration Payment			$ (18.0)		$ (18.0)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs, Liability Beginning Balance					5.2	$ 7.3
Additions of contingent consideration from acquisition					11.5	4.5
Change in fair value of contingent consideration					1.3	8.7
Effect of changes in exchange rates used for translation						(1.2)
Payment of contingent consideration						(9.9)	$ 0.0
Fair Value, Measurement with Unobservable Inputs, Liability Ending Balance	$ 5.2					5.2	$ 7.3
Fair Value Inputs, Discount Rate					1.00%
Accelerated Share Repurchases, Cash or Stock Settlement			160	160
Fair Value Assumptions, Weighted Average Volatility Rate					38.00%
Fair value input, Project Years of Payment	3 years	3 years
Forward Contract Indexed to Issuer's Equity, Classification			40	40
Fair Value Assumptions, Expected Term					2 months 24 days
ClinIntel Acquisition [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Payment of contingent consideration						$ (14.1)