Accumulated Other Comprehensive (loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Aug. 31, 2023	Aug. 31, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ 2,143,000	$ 1,983,828
Ending Balance	2,282,836	1,997,602
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(465,375)	(395,473)
Current period comprehensive income (loss)	9,790	(80,515)
Income taxes associated with current period comprehensive (loss) income	(951)	1,621
Ending Balance	(456,536)	(474,367)
Pension And Other Postretirement Benefit Liability Adjustments, Net of Tax
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(148,764)	(153,383)
Amounts reclassified from accumulated other comprehensive income (loss)	4,122	5,703
Income taxes reclassified into earnings	(958)	(1,431)
Ending Balance	(145,600)	(149,111)
Unrealized Gain (Loss) On Derivatives, Net of Tax
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	11,405	13,171
Amounts reclassified from accumulated other comprehensive income (loss)		(606)
Ending Balance	11,405	12,565
Unrealized Gain (Loss) On Securities, Net of Tax
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(2,201)	(1,652)
Current period comprehensive income (loss)	(87)	(469)
Income taxes associated with current period comprehensive (loss) income	(45)	94
Amounts reclassified from accumulated other comprehensive income (loss)	(130)	40
Income taxes reclassified into earnings	5	(5)
Ending Balance	(2,458)	(1,992)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(604,935)	(537,337)
Current period comprehensive income (loss)	9,703	(80,984)
Income taxes associated with current period comprehensive (loss) income	(996)	1,715
Amounts reclassified from accumulated other comprehensive income (loss)	3,992	5,137
Income taxes reclassified into earnings	(953)	(1,436)
Ending Balance	$ (593,189)	$ (612,905)