Accumulated Other Comprehensive (loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 29, 2024	Feb. 28, 2023	Feb. 29, 2024	Feb. 28, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ 2,362,554	$ 2,092,085	$ 2,143,000	$ 1,983,828
Ending Balance	2,348,213	2,054,982	2,348,213	2,054,982
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(456,577)	(465,218)	(465,375)	(395,473)
Current period comprehensive (loss) income	(6,720)	(7,006)	2,397	(78,942)
Income taxes associated with current period comprehensive income (loss)	(872)	72	(1,191)	2,263
Ending Balance	(464,169)	(472,152)	(464,169)	(472,152)
Pension And Other Postretirement Benefit Liability Adjustments, Net of Tax
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(142,154)	(145,562)	(148,764)	(153,383)
Amounts reclassified from accumulated other comprehensive income (loss)	4,391	4,738	13,013	15,064
Income taxes reclassified into earnings	(1,035)	(1,132)	(3,047)	(3,637)
Ending Balance	(138,798)	(141,956)	(138,798)	(141,956)
Unrealized Gain (Loss) On Derivatives, Net of Tax
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	11,405	11,960	11,405	13,171
Amounts reclassified from accumulated other comprehensive income (loss)		(554)		(1,765)
Ending Balance	11,405	11,406	11,405	11,406
Unrealized Gain (Loss) On Securities, Net of Tax
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(2,364)	(2,226)	(2,201)	(1,652)
Current period comprehensive (loss) income	211	(55)	289	(863)
Income taxes associated with current period comprehensive income (loss)	(8)	198	(70)	409
Amounts reclassified from accumulated other comprehensive income (loss)	(7)	(37)	(197)	(9)
Income taxes reclassified into earnings	1	1	12	(4)
Ending Balance	(2,167)	(2,119)	(2,167)	(2,119)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(589,690)	(601,046)	(604,935)	(537,337)
Current period comprehensive (loss) income	(6,509)	(7,061)	2,686	(79,805)
Income taxes associated with current period comprehensive income (loss)	(880)	270	(1,261)	2,672
Amounts reclassified from accumulated other comprehensive income (loss)	4,384	4,147	12,816	13,290
Income taxes reclassified into earnings	(1,034)	(1,131)	(3,035)	(3,641)
Ending Balance	$ (593,729)	$ (604,821)	$ (593,729)	$ (604,821)