Quarterly report pursuant to Section 13 or 15(d)

Credit Losses - Additional Information (Details)

v3.21.2
Credit Losses - Additional Information (Details) - Investment
Jul. 31, 2021
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 13 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 19 15