Corporate Investments and Funds Held For Clients (Expected Maturities Of Available-For-Sale Securities) (Details) - USD ($) $ in Millions	Sep. 30, 2022	Jun. 30, 2022
Corporate Investments And Funds Held For Clients [Abstract]
One year or less	$ 3,353.5
One year to two years	5,500.0
Two years to three years	5,774.3
Three years to four years	6,549.4
After four years	7,583.8
Total available-for-sale securities	$ 28,761.0	$ 28,391.6