Corporate Investments and Funds Held For Clients (Expected Maturities Of Available-For-Sale Securities) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Jun. 30, 2022
Corporate Investments And Funds Held For Clients [Abstract]
One year or less	$ 3,310.7
One year to two years	5,854.5
Two years to three years	6,497.9
Three years to four years	5,978.0
After four years	7,198.3
Total available-for-sale securities	$ 28,839.4	$ 28,391.6