Corporate Investments And Funds Held For Clients (Schedule Of Investment Of Funds Held For Clients) (Details) - USD ($) $ in Millions		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Marketable Securities [Line Items]
Restricted cash and cash equivalents held to satisfy client funds obligations	[1]	$ 4,847.0	$ 4,372.1	$ 5,401.2
Total funds held for clients		29,434.2	27,137.8
Current [Member]
Marketable Securities [Line Items]
Available-for-sale Securities, Restricted		5,013.9	2,521.4
Non-current [Member]
Marketable Securities [Line Items]
Available-for-sale Securities, Restricted		$ 19,573.3	$ 20,244.3

[1] See Note 7 for a reconciliation of restricted cash and restricted cash equivalents in funds held for clients on the Consolidated Balance Sheets.