Corporate Investments and Funds Held For Clients (Schedule Of Investment Of Funds Held For Clients) (Details) - USD ($) $ in Millions	Mar. 31, 2023		Jun. 30, 2022	Mar. 31, 2022	[1]
Debt Securities, Available-for-sale [Line Items]
Restricted cash and cash equivalents held to satisfy client funds obligations	$ 16,212.2	[1]	$ 21,346.7	$ 30,096.4
Total funds held for clients	45,848.4		49,569.2
Current
Debt Securities, Available-for-sale [Line Items]
Available-for-sale securities, restricted	4,021.1		4,263.1
Non-current
Debt Securities, Available-for-sale [Line Items]
Available-for-sale securities, restricted	$ 25,615.1		$ 23,959.4

[1] See Note 6 for a reconciliation of restricted cash and restricted cash equivalents in funds held for clients on the Consolidated Balance Sheets.