Goodwill And Intangible Assets, Net (Changes In Goodwill) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Sep. 30, 2014
Goodwill [Roll Forward]
Beginning balance	$ 1,887.2	[1]
Additions and other adjustments, net	6.2
Currency translation adjustments	(35.8)
Ending balance	1,857.6	[1]
Employer Services [Member]
Goodwill [Roll Forward]
Beginning balance	1,882.4	[1]
Additions and other adjustments, net	6.2
Currency translation adjustments	(35.8)
Ending balance	1,852.8	[1]
PEO Services [Member]
Goodwill [Roll Forward]
Beginning balance	4.8
Additions and other adjustments, net	0
Currency translation adjustments	0
Ending balance	$ 4.8

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