Corporate Investments and Funds Held For Clients (Expected Maturities Of Available-For-Sale Securities) (Details) - USD ($) $ in Millions	Mar. 31, 2022	Jun. 30, 2021
Corporate Investments And Funds Held For Clients [Abstract]
One year or less	$ 4,365.1
One year to two years	2,922.2
Two years to three years	3,620.9
Three years to four years	6,780.0
After four years	10,562.6
Total available-for-sale securities	$ 28,250.8	$ 24,371.7