Pension Plans - Retirement-Related Benefit Plans' Impact on Income Before Income Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 28, 2026	Feb. 28, 2025	Feb. 28, 2026	Feb. 28, 2025
Pension Benefits | U.S. Plans
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 10,863	$ 10,804	$ 32,589	$ 32,412
Interest cost	9,484	9,795	28,452	29,385
Expected return on plan assets	(13,326)	(12,017)	(39,978)	(36,051)
Prior service cost (credit)	1	1	1	1
Net actuarial losses (gains) recognized	1,448	2,153	4,344	6,459
Net Periodic Benefit Cost	8,470	10,736	25,408	32,206
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	4,401	3,360
Interest cost	2,028	1,963	6,084	5,889
Expected return on plan assets	(2,506)	(2,376)	(7,518)	(7,128)
Prior service cost (credit)	(25)	(32)	(75)	(96)
Net actuarial losses (gains) recognized	323	294	969	882
Net Periodic Benefit Cost	1,287	969	3,861	2,907
Postretirement Benefits | U.S. Plans
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Interest cost	12	21	36	63
Net actuarial losses (gains) recognized	9	(6)	27	(18)
Net Periodic Benefit Cost	21	15	63	45
Postretirement Benefits | Non-U.S. Plans
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	234	425	702	1,275
Interest cost	272	318	816	954
Net actuarial losses (gains) recognized	(256)	(140)	(768)	(420)
Net Periodic Benefit Cost	$ 250	$ 603	$ 750	$ 1,809