Pension Plans - Retirement-Related Benefit Plans' Impact on Income Before Income Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 28, 2025	Feb. 29, 2024	Feb. 28, 2025	Feb. 29, 2024
Pension Benefits | U.S. Plans
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 10,804	$ 10,913	$ 32,412	$ 32,739
Interest cost	9,795	8,992	29,385	26,976
Expected return on plan assets	(12,017)	(10,518)	(36,051)	(31,554)
Prior service cost (credit)	1	1	1	3
Net actuarial (gains) losses recognized	2,153	4,205	6,459	12,615
Net Periodic Benefit Cost	10,736	13,593	32,206	40,779
Pension Benefits | Non-U.S. Plans
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	1,120	887	3,360	2,661
Interest cost	1,963	1,935	5,889	5,805
Expected return on plan assets	(2,376)	(2,400)	(7,128)	(7,200)
Prior service cost (credit)	(32)	(31)	(96)	(93)
Net actuarial (gains) losses recognized	294	209	882	627
Net Periodic Benefit Cost	969	600	2,907	1,800
Postretirement Benefits | U.S. Plans
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Interest cost	21	22	63	66
Net actuarial (gains) losses recognized	(6)	(4)	(18)	(12)
Net Periodic Benefit Cost	15	18	45	54
Postretirement Benefits | Non-U.S. Plans
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	425	569	1,275	1,707
Interest cost	318	390	954	1,170
Net actuarial (gains) losses recognized	(140)	(12)	(420)	(36)
Net Periodic Benefit Cost	$ 603	$ 947	$ 1,809	$ 2,841