Corporate Investments And Funds Held For Clients (Classification Of Corporate Investments On The Consolidated Balance Sheets) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013		Jun. 30, 2013		Sep. 30, 2012	Jun. 30, 2012
Corporate Investments And Funds Held For Clients [Abstract]
Cash and cash equivalents	$ 1,149.0	[1]	$ 1,699.1	[1]	$ 1,117.4	$ 1,548.1
Short-term marketable securities	541.9	[1],[2]	28.0
Long-term marketable securities	2,549.0	[1],[2]	314.0	[1]
Total corporate investments	$ 4,239.9		$ 2,041.1

[1] As of September 30, 2013, $234.0 million of long-term marketable securities, $103.6 million of short-term marketable securities, and $3.3 million of cash and cash equivalents have been pledged as collateral under the Company's reverse repurchase agreements (see Note 10). As of June 30, 2013, $245.2 million of long-term marketable securities and $0.7 million of cash and cash equivalents have been pledged as collateral under the Company's reverse repurchase agreements (see Note 10).

[2] As of September 30, 2013, $2,132.4 million of long-term marketable securities and $407.6 million of short-term marketable securities are related to the Company's outstanding commercial paper borrowing (see Note 10).