Corporate Investments and Funds Held For Clients (Expected Maturities Of Available-For-Sale Securities) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Jun. 30, 2022
Corporate Investments And Funds Held For Clients [Abstract]
One year or less	$ 4,047.4
One year to two years	5,082.4
Two years to three years	7,933.6
Three years to four years	5,423.2
After four years	7,175.9
Total available-for-sale securities	$ 29,662.5	$ 28,391.6