Corporate Investments and Funds Held For Clients (Schedule Of Investment Of Funds Held For Clients) (Details) - USD ($) $ in Millions	Sep. 30, 2022		Jun. 30, 2022	Sep. 30, 2021	[1]
Debt Securities, Available-for-sale [Line Items]
Restricted cash and restricted equivalents included in funds held for clients	$ 4,368.3	[1]	$ 21,346.7	$ 21,590.2
Total funds held for clients	32,937.9		49,569.2
Current
Debt Securities, Available-for-sale [Line Items]
Available-for-sale securities, restricted	3,329.0		4,263.1
Non-current
Debt Securities, Available-for-sale [Line Items]
Available-for-sale securities, restricted	$ 25,240.6		$ 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.