Accumulated Other Comprehensive (loss) - Schedule of Accumulated other comprehensive (loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 28, 2026	Feb. 28, 2025	Feb. 28, 2026	Feb. 28, 2025
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ 3,130,813	$ 2,717,650	$ 2,886,782	$ 2,512,225
Ending Balance	3,148,120	2,675,782	3,148,120	2,675,782
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(462,042)	(507,964)	(470,851)	(461,847)
Current period comprehensive (loss) income	42,631	(21,201)	51,038	(65,159)
Income taxes associated with current period	(532)	1,542	(130)	1,473
Income taxes reclassified into earnings				(2,090)
Ending Balance	(419,943)	(527,623)	(419,943)	(527,623)
Pension And Other Postretirement Benefit Liability Adjustments, Net of Tax
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(70,153)	(82,589)	(72,661)	(84,647)
Current period comprehensive (loss) income				(1,521)
Amounts reclassified from accumulated other comprehensive income (loss)	1,128	2,697	4,414	7,431
Income taxes reclassified into earnings	(214)	(688)	(992)	(1,843)
Ending Balance	(69,239)	(80,580)	(69,239)	(80,580)
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	(1,125)	(1,615)	(1,524)	(2,201)
Current period comprehensive (loss) income	109	128	554	1,036
Income taxes associated with current period	(7)	(2)	(28)	(85)
Amounts reclassified from accumulated other comprehensive income (loss)	(3)	(3)	(30)	(279)
Income taxes reclassified into earnings		0	2	37
Ending Balance	(1,026)	(1,492)	(1,026)	(1,492)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(521,915)	(580,763)	(533,631)	(537,290)
Current period comprehensive (loss) income	42,740	(21,073)	51,592	(65,644)
Income taxes associated with current period	(539)	1,540	(158)	1,388
Amounts reclassified from accumulated other comprehensive income (loss)	1,125	2,694	4,384	7,152
Income taxes reclassified into earnings	(214)	(688)	(990)	(3,896)
Ending Balance	$ (478,803)	$ (598,290)	$ (478,803)	$ (598,290)