Goodwill And Intangible Assets, Net (Changes In Goodwill) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Sep. 30, 2013
Goodwill [Roll Forward]
Beginning balance	$ 3,052.6	[1]
Additions and other adjustments, net	12.1
Currency translation adjustments	31.0
Ending balance	3,095.7	[1]
Employer Services [Member]
Goodwill [Roll Forward]
Beginning balance	1,878.8	[1]
Additions and other adjustments, net	1.0
Currency translation adjustments	23.9
Ending balance	1,903.7	[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
Dealer Services [Member]
Goodwill [Roll Forward]
Beginning balance	1,169.0
Additions and other adjustments, net	11.1
Currency translation adjustments	7.1
Ending balance	$ 1,187.2

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