Corporate Investments And Funds Held For Clients (Schedule Of Investment Of Funds Held For Clients) (Details) - USD ($) $ in Millions	Sep. 30, 2015	Jun. 30, 2015
Corporate Investments And Funds Held For Clients [Abstract]
Restricted cash and cash equivalents held to satisfy client funds obligations	$ 4,182.4	$ 4,047.0
Restricted short-term marketable securities held to satisfy client funds obligations	4,143.1	4,497.7
Restricted long-term marketable securities held to satisfy client funds obligations	16,183.2	16,320.6
Total funds held for clients	$ 24,508.7	$ 24,865.3