Pension Plans - Retirement-Related Benefit Plans' Impact on Income Before Income Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Nov. 30, 2023	Nov. 30, 2022	Nov. 30, 2023	Nov. 30, 2022
Pension Benefits | U.S. Plans
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 10,913	$ 10,890	$ 21,826	$ 21,780
Interest cost	8,992	7,173	17,984	14,346
Expected return on plan assets	(10,518)	(9,536)	(21,036)	(19,072)
Prior service cost (credit)	1		2
Net actuarial (gains) losses recognized	4,205	4,487	8,410	8,974
Net Periodic Benefit Cost	13,593	13,014	27,186	26,028
Pension Benefits | Non-U.S. Plans
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	887	951	1,774	1,902
Interest cost	1,935	1,728	3,870	3,456
Expected return on plan assets	(2,400)	(1,727)	(4,800)	(3,454)
Prior service cost (credit)	(31)	(27)	(62)	(54)
Net actuarial (gains) losses recognized	209	125	418	250
Net Periodic Benefit Cost	600	1,050	1,200	2,100
Postretirement Benefits | U.S. Plans
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Interest cost	22	21	44	42
Prior service cost (credit)		(30)		(60)
Net actuarial (gains) losses recognized	(4)	11	(8)	22
Net Periodic Benefit Cost	18	2	36	4
Postretirement Benefits | Non-U.S. Plans
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	569	287	1,138	574
Interest cost	390	368	780	736
Net actuarial (gains) losses recognized	(12)	(14)	(24)	(28)
Net Periodic Benefit Cost	$ 947	$ 641	$ 1,894	$ 1,282