Derivative Instruments and Hedging Activities - Balance Sheet Impact (Details) - USD ($) $ in Thousands	Feb. 28, 2022	May 31, 2021
Derivative [Line Items]
Derivative assets	$ 50,901	$ 121,259
Derivative liabilities	391,988	584,989
Derivative asset, notional amount	2,449,726	2,560,618
Derivative liability, notional amount	5,622,666	6,417,898
Interest rate swaps
Derivative [Line Items]
Derivative assets	50,901	121,259
Derivative liabilities	391,988	584,989
Derivative asset, notional amount	2,449,726	2,560,618
Derivative liability, notional amount	$ 5,622,666	$ 6,417,898

Nominal or face amount used to calculate payments on the derivative asset.

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