Corporate Investments and Funds Held For Clients (Schedule Of Investment Of Funds Held For Clients) (Details) - USD ($) $ in Millions	Mar. 31, 2022		Jun. 30, 2021	Mar. 31, 2021	[1]
Debt Securities, Available-for-sale [Line Items]
Restricted cash and restricted cash equivalents included in funds held for clients	$ 30,096.4	[1]	$ 10,568.0	$ 18,230.3
Total funds held for clients	58,319.6		34,905.8
Current
Debt Securities, Available-for-sale [Line Items]
Available-for-sale securities, restricted	4,337.5		3,743.3
Non-current
Debt Securities, Available-for-sale [Line Items]
Available-for-sale securities, restricted	$ 23,885.7		$ 20,594.5

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