Goodwill And Intangible Assets, Net (Changes In Goodwill) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Mar. 31, 2013
Goodwill
Beginning balance	$ 3,062.0
Additions and other adjustments, net	1.4
Currency translation adjustments	(5.1)
Ending balance	3,068.5
Employer Services [Member]
Goodwill
Beginning balance	1,887.6
Additions and other adjustments, net	0.5
Currency translation adjustments	(8.4)
Ending balance	1,896.5
PEO Services [Member]
Goodwill
Beginning balance	4.8
Additions and other adjustments, net	0
Currency translation adjustments	0
Ending balance	4.8
Dealer Services [Member]
Goodwill
Beginning balance	1,169.6
Additions and other adjustments, net	0.9
Currency translation adjustments	3.3
Ending balance	$ 1,167.2