Retirement-Related Benefit Plans' Impact on Income Before Income Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Nov. 30, 2022	Nov. 30, 2021	Nov. 30, 2022	Nov. 30, 2021
Pension Benefits | U.S. Plans
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 10,890	$ 11,914	$ 21,780	$ 23,828
Interest cost	7,173	3,842	14,346	7,684
Expected return on plan assets	(9,536)	(10,386)	(19,072)	(20,772)
Prior service cost (credit)		1		2
Net actuarial losses recognized	4,487	4,225	8,974	8,450
Net Periodic Benefit (Credit) Cost	13,014	9,596	26,028	19,192
Pension Benefits | Non-U.S. Plans
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	951	1,348	1,902	2,696
Interest cost	1,728	1,282	3,456	2,564
Expected return on plan assets	(1,727)	(2,073)	(3,454)	(4,146)
Prior service cost (credit)	(27)	(38)	(54)	(76)
Net actuarial losses recognized	125	114	250	228
Net Periodic Benefit (Credit) Cost	1,050	633	2,100	1,266
Postretirement Benefits | U.S. Plans
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Interest cost	21	10	42	20
Prior service cost (credit)	(30)	(40)	(60)	(80)
Net actuarial losses recognized	11	15	22	30
Net Periodic Benefit (Credit) Cost	2	(15)	4	(30)
Postretirement Benefits | Non-U.S. Plans
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	287	432	574	864
Interest cost	368	299	736	598
Net actuarial losses recognized	(14)	32	(28)	64
Net Periodic Benefit (Credit) Cost	$ 641	$ 763	$ 1,282	$ 1,526