CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	May 31, 2023	May 31, 2022	May 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 501,587	$ 798,537	$ 813,978
Other comprehensive income:
Changes in unrealized gains on derivative cash flow hedges	6,691	4,028	0
Reclassification to earnings of realized gains on derivatives	(712)	(623)	(412)
Defined benefit plan adjustments	106	(1,122)	2,297
Other comprehensive income	6,085	2,283	1,885
Total comprehensive income	507,672	800,820	815,863
Less: Total comprehensive income attributable to noncontrolling interests	(97)	(2,692)	(2,311)
Total comprehensive income attributable to CFC	$ 507,575	$ 798,128	$ 813,552