CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2026	May 31, 2025	May 31, 2024
Statement of Comprehensive Income [Abstract]
Net income	$ 262,736	$ 140,014	$ 554,316
Other comprehensive income (loss):
Changes in unrealized gains on derivative cash flow hedges	0	803	483
Reclassification to earnings of realized gains on derivatives	(470)	(1,155)	(8,298)
Defined benefit plan adjustments	337	(468)	(1,944)
Other comprehensive loss	(133)	(820)	(9,759)
Total comprehensive income	262,603	139,194	544,557
Less: Total comprehensive income attributable to noncontrolling interests	(624)	(281)	(967)
Total comprehensive income attributable to CFC	$ 261,979	$ 138,913	$ 543,590