Accumulated Other Comprehensive (loss) - Schedule of Accumulated other comprehensive (loss) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Nov. 30, 2025	Nov. 30, 2024	Nov. 30, 2025	Nov. 30, 2024
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ 3,056,594	$ 2,651,527	$ 2,886,782	$ 2,512,225
Ending Balance	3,130,813	2,717,650	3,130,813	2,717,650
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(451,369)	(465,638)	(470,851)	(461,847)
Current period comprehensive (loss) income	(11,208)	(42,679)	8,407	(43,958)
Income taxes associated with current period	535	353	402	(69)
Income taxes reclassified into earnings				(2,090)
Ending Balance	(462,042)	(507,964)	(462,042)	(507,964)
Pension And Other Postretirement Benefit Liability Adjustments, Net of Tax
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(71,568)	(84,789)	(72,661)	(84,647)
Current period comprehensive (loss) income				(1,521)
Amounts reclassified from accumulated other comprehensive income (loss)	1,877	2,968	3,286	4,734
Income taxes reclassified into earnings	(462)	(768)	(778)	(1,155)
Ending Balance	(70,153)	(82,589)	(70,153)	(82,589)
Unrealized Gain (Loss) On Derivatives, Net of Tax
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	11,405	11,405	11,405	11,405
Ending Balance	11,405	11,405	11,405	11,405
Unrealized Gain (Loss) On Securities, Net of Tax
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(1,300)	(1,568)	(1,524)	(2,201)
Current period comprehensive (loss) income	180	97	436	896
Income taxes associated with current period	(3)	(23)	(21)	(82)
Amounts reclassified from accumulated other comprehensive income (loss)	(2)	(141)	(18)	(265)
Income taxes reclassified into earnings		20	2	37
Ending Balance	(1,125)	(1,615)	(1,125)	(1,615)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(512,832)	(540,590)	(533,631)	(537,290)
Current period comprehensive (loss) income	(11,028)	(42,582)	8,843	(44,583)
Income taxes associated with current period	532	330	381	(151)
Amounts reclassified from accumulated other comprehensive income (loss)	1,875	2,827	3,268	4,469
Income taxes reclassified into earnings	(462)	(748)	(776)	(3,208)
Ending Balance	$ (521,915)	$ (580,763)	$ (521,915)	$ (580,763)