Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Nov. 30, 2021	Nov. 30, 2020	Nov. 30, 2021	Nov. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 135,729	$ 160,521	$ 45,397	$ 305,108
Other comprehensive income (loss):
Unrealized gains on cash flow hedge	3,612	0	4,028	0
Reclassification to earnings of realized gains on derivatives	(143)	(107)	(240)	(212)
Defined benefit plan adjustments	72	188	143	376
Other comprehensive income	3,541	81	3,931	164
Total comprehensive income	139,270	160,602	49,328	305,272
Less: Total comprehensive income attributable to noncontrolling interests	(631)	(505)	(193)	(676)
Total comprehensive income attributable to CFC	$ 138,639	$ 160,097	$ 49,135	$ 304,596