Retirement-Related Benefit Plans' Impact on Income Before Income Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 28, 2022	Feb. 28, 2021	Feb. 28, 2022	Feb. 28, 2021
Pension Benefits | U.S. Plans
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 11,914	$ 11,130	$ 35,742	$ 33,390
Interest cost	3,842	3,806	11,526	11,418
Expected return on plan assets	(10,386)	(8,279)	(31,158)	(24,837)
Prior service cost (credit)	1	2	3	6
Net actuarial losses recognized	4,225	7,501	12,675	22,503
Net Periodic Benefit (Credit) Cost	9,596	14,160	28,788	42,480
Pension Benefits | Non-U.S. Plans
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	1,348	1,406	4,044	4,218
Interest cost	1,282	1,122	3,846	3,366
Expected return on plan assets	(2,073)	(1,607)	(6,219)	(4,821)
Prior service cost (credit)	(38)	(35)	(114)	(105)
Net actuarial losses recognized	114	526	342	1,578
Net Periodic Benefit (Credit) Cost	633	1,412	1,899	4,236
Postretirement Benefits | U.S. Plans
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Interest cost	10	19	30	57
Prior service cost (credit)	(40)	(42)	(120)	(126)
Net actuarial losses recognized	15	10	45	30
Net Periodic Benefit (Credit) Cost	(15)	(13)	(45)	(39)
Postretirement Benefits | Non-U.S. Plans
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	432	431	1,296	1,293
Interest cost	299	283	897	849
Net actuarial losses recognized	32	130	96	390
Net Periodic Benefit (Credit) Cost	$ 763	$ 844	$ 2,289	$ 2,532