Changes Recognized in Other Comprehensive loss (income), Postretirement Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2023	May 31, 2022	May 31, 2021
Amounts recognized as a component of net periodic benefit cost:
Total recognized in other comprehensive (income) loss	$ (4,619)	$ (37,227)	$ (87,107)
Postretirement Benefits | Domestic
Changes in plan assets and benefit obligations recognized in other comprehensive loss (income):
Net loss (gain) arising during the year	(369)	(123)
Amounts recognized as a component of net periodic benefit cost:
Amortization or curtailment recognition of prior service credit	121	160
Amortization or settlement recognition of net (loss) gain	(44)	(60)
Total recognized in other comprehensive (income) loss	(292)	(23)
Postretirement Benefits | Non-U.S. Plans
Changes in plan assets and benefit obligations recognized in other comprehensive loss (income):
Net loss (gain) arising during the year	(276)	(9,240)
Effect of exchange rates on amounts included in AOCI	(265)	(418)
Amounts recognized as a component of net periodic benefit cost:
Amortization or settlement recognition of net (loss) gain	(51)	(121)
Total recognized in other comprehensive (income) loss	$ (40)	$ (9,779)