CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2025	May 31, 2024	May 31, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 140,014	$ 554,316	$ 501,587
Other comprehensive income (loss):
Changes in unrealized gains on derivative cash flow hedges	803	483	6,691
Reclassification to earnings of realized gains on derivatives	(1,155)	(8,298)	(712)
Defined benefit plan adjustments	(468)	(1,944)	106
Other comprehensive income (loss)	(820)	(9,759)	6,085
Total comprehensive income	139,194	544,557	507,672
Less: Total comprehensive income attributable to noncontrolling interests	(281)	(967)	(97)
Total comprehensive income attributable to CFC	$ 138,913	$ 543,590	$ 507,575