Accumulated Other Comprehensive Income (loss) (Detail) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2024	May 31, 2023	May 31, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ 2,143,000	$ 1,983,828	$ 1,743,025
Ending Balance	2,512,225	2,143,000	1,983,828
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(465,375)	(395,473)	(300,365)
Current period comprehensive (loss) income	3,276	(71,772)	(98,834)
Income taxes associated with current period comprehensive (loss) income	252	1,870	3,726
Ending Balance	(461,847)	(465,375)	(395,473)
Pension And Other Postretirement Benefit Liability Adjustments, Net of Tax
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(148,764)	(153,383)	(190,610)
Current period comprehensive (loss) income	66,592	(12,242)	31,802
Income taxes associated with current period comprehensive (loss) income	(15,769)	2,785	(7,763)
Amounts reclassified from accumulated other comprehensive income (loss)	17,416	18,363	17,276
Income taxes reclassified into earnings	(4,122)	(4,287)	(4,088)
Ending Balance	(84,647)	(148,764)	(153,383)
Unrealized Gain (Loss) On Derivatives, Net of Tax
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	11,405	13,171	(23,982)
Current period comprehensive (loss) income			60,669
Income taxes associated with current period comprehensive (loss) income			(14,491)
Amounts reclassified from accumulated other comprehensive income (loss)		(1,766)	(12,097)
Income taxes reclassified into earnings			3,072
Ending Balance	11,405	11,405	13,171
Unrealized Gain (Loss) On Securities, Net of Tax
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(2,201)	(1,652)	73
Current period comprehensive (loss) income	205	(482)	(1,785)
Income taxes associated with current period comprehensive (loss) income	(56)	4	3
Amounts reclassified from accumulated other comprehensive income (loss)	(165)	(67)	59
Income taxes reclassified into earnings	16	(4)	(2)
Ending Balance	(2,201)	(2,201)	(1,652)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(604,935)	(537,337)	(514,884)
Current period comprehensive (loss) income	70,073	(84,496)	(8,148)
Income taxes associated with current period comprehensive (loss) income	(15,573)	4,659	(18,525)
Amounts reclassified from accumulated other comprehensive income (loss)	17,251	16,530	5,238
Income taxes reclassified into earnings	(4,106)	(4,291)	(1,018)
Ending Balance	$ (537,290)	$ (604,935)	$ (537,337)