Goodwill And Intangible Assets, Net (Changes In Goodwill) (Details) (USD $) In Millions	12 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Beginning balance	$ 2,383.3	$ 2,375.5
Additions and other adjustments, net	584.2	82.0
Adjustments for discontinued operations		(15.0)
Currency translation adjustments	106.1	(59.2)
Ending balance	3,073.6	2,383.3
Employer Services Segment [Member]
Beginning balance	1,611.3	1,567.0
Additions and other adjustments, net	251.3	80.6
Adjustments for discontinued operations
Currency translation adjustments	72.4	(36.3)
Ending balance	1,935.0	1,611.3
PEO Services Segment [Member]
Beginning balance	4.8	4.8
Additions and other adjustments, net
Adjustments for discontinued operations
Currency translation adjustments
Ending balance	4.8	4.8
Dealer Services Segment [Member]
Beginning balance	767.2	803.7
Additions and other adjustments, net	332.9	1.4
Adjustments for discontinued operations		(15.0)
Currency translation adjustments	33.7	(22.9)
Ending balance	$ 1,133.8	$ 767.2