Corporate Investments And Funds Held For Clients (Classification Of Corporate Investments On The Consolidated Balance Sheets) (Details) - USD ($) $ in Millions	Jun. 30, 2016		Jun. 30, 2015		Jun. 30, 2014
Corporate Investments And Funds Held For Clients [Abstract]
Cash and cash equivalents	$ 3,191.1	[1]	$ 1,639.3		$ 1,584.0
Marketable Securities, Current	23.5	[1]	26.6
Long-term marketable securities	7.8		28.9	[1]
Total corporate investments	$ 3,222.4		$ 1,694.8

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