Goodwill and Intangible Assets Changes in carrying amount of goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Goodwill, Beginning Balance	$ 354.9	$ 329.5
Effect of changes in business segments	0.0
Effect of changes in exchange rates used for translation	(18.2)	(13.5)
Goodwill, Ending Balance	389.2	354.9
QSI Acquisition [Member]
Goodwill arising from acquisition		24.1
ClinIntel Acquisition [Member]
Goodwill arising from acquisition		13.4
Atlas [Member]
Goodwill arising from acquisition		1.4
Goodwill, Ending Balance	1.4
Health Advances Acquisition [Member]
Goodwill arising from acquisition	52.5
CRS [Member]
Goodwill, Beginning Balance	143.8	125.5
Effect of changes in business segments	3.9
Effect of changes in exchange rates used for translation	(5.9)	(7.2)
Goodwill, Ending Balance	141.8	143.8
CRS [Member] | QSI Acquisition [Member]
Goodwill arising from acquisition		24.1
CRS [Member] | ClinIntel Acquisition [Member]
Goodwill arising from acquisition		0.0
CRS [Member] | Atlas [Member]
Goodwill arising from acquisition		1.4
CRS [Member] | Health Advances Acquisition [Member]
Goodwill arising from acquisition	0.0
PC [Member]
Goodwill, Beginning Balance	20.6	22.1
Effect of changes in business segments	(3.9)
Effect of changes in exchange rates used for translation	(2.1)	(1.5)
Goodwill, Ending Balance	67.1	20.6
PC [Member] | QSI Acquisition [Member]
Goodwill arising from acquisition		0.0
PC [Member] | ClinIntel Acquisition [Member]
Goodwill arising from acquisition		0.0
PC [Member] | Atlas [Member]
Goodwill arising from acquisition		0.0
PC [Member] | Health Advances Acquisition [Member]
Goodwill arising from acquisition	52.5
PI [Member]
Goodwill, Beginning Balance	190.5	181.9
Effect of changes in business segments	0.0
Effect of changes in exchange rates used for translation	(10.2)	(4.8)
Goodwill, Ending Balance	180.3	190.5
PI [Member] | QSI Acquisition [Member]
Goodwill arising from acquisition		0.0
PI [Member] | ClinIntel Acquisition [Member]
Goodwill arising from acquisition		13.4
PI [Member] | Atlas [Member]
Goodwill arising from acquisition		$ 0.0
PI [Member] | Health Advances Acquisition [Member]
Goodwill arising from acquisition	$ 0.0