Goodwill And Intangible Assets, Net (Changes In Goodwill) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Goodwill [Roll Forward]
Beginning balance	$ 3,039.2	$ 3,048.6
Additions and other adjustments, net	24.1	30.2
Currency translation adjustments	50.5	3.1
Goodwill, Impairment Loss	0	(42.7)	0
Ending balance	3,113.8	3,039.2	3,048.6
Employer Services [Member]
Goodwill [Roll Forward]
Beginning balance	1,865.4	1,874.2
Additions and other adjustments, net	0.3	29.4
Currency translation adjustments	16.7	4.5
Ending balance	1,882.4	1,865.4
PEO Services [Member]
Goodwill [Roll Forward]
Beginning balance	4.8	4.8
Additions and other adjustments, net	0	0
Currency translation adjustments	0	0
Goodwill, Impairment Loss		0
Ending balance	4.8	4.8
Dealer Services [Member]
Goodwill [Roll Forward]
Beginning balance	1,169.0	1,169.6
Additions and other adjustments, net	23.8	0.8
Currency translation adjustments	33.8	(1.4)
Goodwill, Impairment Loss		0
Ending balance	$ 1,226.6	$ 1,169.0