Goodwill And Intangible Assets, Net (Changes In Goodwill) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Mar. 31, 2014
Goodwill [Roll Forward]
Beginning balance	$ 3,039.2	[1]
Additions and other adjustments, net	22.9
Currency translation adjustments	39.9
Ending balance	3,102.0	[1]
Employer Services [Member]
Goodwill [Roll Forward]
Beginning balance	1,865.4	[1]
Additions and other adjustments, net	0.2
Currency translation adjustments	13.2
Ending balance	1,878.8	[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
Dealer Services [Member]
Goodwill [Roll Forward]
Beginning balance	1,169.0
Additions and other adjustments, net	22.7
Currency translation adjustments	26.7
Ending balance	$ 1,218.4

[1] The goodwill balance at June 30, 2013 and March 31, 2014 is net of accumulated impairment losses of $42.7 million related to the Employer Services segment.