Corporate Investments And Funds Held For Clients (Classification Of Corporate Investments On The Consolidated Balance Sheets) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015		Jun. 30, 2014		Mar. 31, 2014
Corporate Investments And Funds Held For Clients [Abstract]
Cash and cash equivalents	$ 1,808.6	[1]	$ 1,585.9	[1]	$ 1,311.0
Short-term marketable securities	26.9	[1]	2,032.2	[1]
Long-term marketable securities	29.2		54.1
Total corporate investments	$ 1,864.7		$ 3,672.2

[1] As of June 30, 2014, $2,015.8 million of short-term marketable securities and $183.8 million of cash and cash equivalents are related to the Company's outstanding commercial paper borrowings (see Note 9).