Pension Plans - Retirement-Related Benefit Plans' Impact on Income Before Income Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended
	Aug. 31, 2025	Aug. 31, 2024
Pension Benefits | U.S. Plans
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 10,863	$ 10,804
Interest cost	9,484	9,795
Expected return on plan assets	(13,326)	(12,017)
Prior service cost (credit)	1	1
Net actuarial losses (gains) recognized	1,448	2,153
Net Periodic Benefit Cost	8,470	10,736
Pension Benefits | Non-U.S. Plans
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	1,467	1,120
Interest cost	2,028	1,963
Expected return on plan assets	(2,506)	(2,376)
Prior service cost (credit)	(25)	(32)
Net actuarial losses (gains) recognized	323	294
Net Periodic Benefit Cost	1,287	969
Postretirement Benefits | U.S. Plans
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Interest cost	12	21
Net actuarial losses (gains) recognized	9	(6)
Net Periodic Benefit Cost	21	15
Postretirement Benefits | Non-U.S. Plans
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	234	425
Interest cost	272	318
Net actuarial losses (gains) recognized	(256)	(140)
Net Periodic Benefit Cost	$ 250	$ 603