Goodwill And Intangible Assets, Net (Changes In Goodwill) (Details) - USD ($) $ in Millions		12 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Goodwill
Goodwill, Impairment Loss		$ 0.0	$ 0.0	$ (42.7)
Goodwill [Roll Forward]
Beginning balance	[1]	1,883.5	1,866.4
Additions and other adjustments, net		6.8	0.3
Currency translation adjustments		(96.8)	16.8
Ending balance	[1]	1,793.5	1,883.5	1,866.4
Employer Services [Member]
Goodwill [Roll Forward]
Beginning balance	[1]	1,878.7	1,861.6
Additions and other adjustments, net		6.8	0.3
Currency translation adjustments		(96.8)	16.8
Ending balance	[1]	1,788.7	1,878.7	1,861.6
PEO Services [Member]
Goodwill [Roll Forward]
Beginning balance	[1]	4.8	4.8
Additions and other adjustments, net		0.0	0.0
Currency translation adjustments		0.0	0.0
Ending balance	[1]	$ 4.8	$ 4.8	$ 4.8

[1] The goodwill balance at June 30, 2015, 2014, and 2013 is net of accumulated impairment losses of $42.7 million related to the Employer Services segment.