Corporate Investments And Funds Held For Clients (Schedule Of Investment Of Funds Held For Clients) (Details) - USD ($) $ in Millions		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Marketable Securities [Line Items]
Restricted cash and cash equivalents held to satisfy client funds obligations	[1]	$ 10,568.0	$ 5,145.1	$ 4,847.0
Total funds held for clients		34,905.8	26,708.1
Current
Marketable Securities [Line Items]
Debt securities, available-for-sale, restricted		3,743.3	5,541.2
Long-term
Marketable Securities [Line Items]
Debt securities, available-for-sale, restricted		$ 20,594.5	$ 16,021.8

[1] See Note 4 for a reconciliation of restricted cash and restricted cash equivalents in funds held for clients on the Consolidated Balance Sheets.