Annual report pursuant to Section 13 and 15(d)

Credit Losses - Additional Information (Details)

v3.22.2
Credit Losses - Additional Information (Details) - Investment
Apr. 30, 2022
Apr. 30, 2021
Commercial Paper    
Fair Value And Unrealized Losses On Available For Sale Debt Securities [Line Items]    
Debt securities, available-for-sale, unrealized loss position, number of investments 27 18
Corporate Notes/Bonds    
Fair Value And Unrealized Losses On Available For Sale Debt Securities [Line Items]    
Debt securities, available-for-sale, unrealized loss position, number of investments 23 15
U.S. Treasury and Agency Securities    
Fair Value And Unrealized Losses On Available For Sale Debt Securities [Line Items]    
Debt securities, available-for-sale, unrealized loss position, number of investments 1 0