Corporate Investments And Funds Held For Clients (Classification Of Corporate Investments On The Consolidated Balance Sheets) (Details) - USD ($) $ in Millions	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Corporate Investments And Funds Held For Clients [Abstract]
Cash and cash equivalents	$ 2,780.4	$ 3,191.1	$ 1,639.3	$ 1,983.6
Marketable Securities, Current	3.2	23.5
Long-term marketable securities	7.6	7.8
Total corporate investments	$ 2,791.2	$ 3,222.4