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Derivative Instruments and Hedging Activities - Summary of gains and losses recorded on the consolidated statements of operations for the entity's derivatives (Details) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2023	May 31, 2022	May 31, 2021
Derivative [Line Items]
Derivative cash settlements interest income (expense)	$ 0	$ 0	$ 0
Derivative forward value gains	252,267	557,867	621,946
Derivative gains	285,844	456,482	506,301
Interest rate swaps
Derivative [Line Items]
Derivative cash settlements interest income (expense)	33,577	(101,385)	(115,645)
Derivative forward value gains	252,267	557,867	621,946
Derivative gains	$ 285,844	$ 456,482	$ 506,301

The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period.

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