Corporate Investments and Funds Held For Clients (Schedule Of Investment Of Funds Held For Clients) (Details) - USD ($) $ in Millions	Dec. 31, 2022		Jun. 30, 2022	Dec. 31, 2021	[1]
Debt Securities, Available-for-sale [Line Items]
Restricted cash and restricted equivalents included in funds held for clients	$ 11,937.5	[1]	$ 21,346.7	$ 18,789.2
Total funds held for clients	40,760.5		49,569.2
Current
Debt Securities, Available-for-sale [Line Items]
Available-for-sale securities, restricted	3,294.3		4,263.1
Non-current
Debt Securities, Available-for-sale [Line Items]
Available-for-sale securities, restricted	$ 25,528.7		$ 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.