Changes in Equity - Summary of Changes in Accumulated Other Comprehensive Loss (Parenthetical) (Detail) - Accumulated Foreign Currency Adjustment Attributable to Parent - USD ($)		6 Months Ended
		Nov. 30, 2019	Nov. 30, 2018
Reclassification adjustments to income	[1]	$ 8,496,000	$ 0
Nisshin
Reclassification adjustments to income		1,042,000
Cryogenics
Reclassification adjustments to income		$ 7,454,000

[1]   (a) The statement of earnings classifications of amounts reclassified to income include:    (1) Foreign currency translation – result of $7,454,000 related to the sale of our cryogenics business in Turkey; and $1,042,000 related to the impairment of our Nisshin joint venture.   (2) Pension liability adjustment – result of the settlement of certain participant balances within the pension plan maintained by WAVE.   (3) Cash flow hedges – disclosed in “NOTE Q – Derivative Instruments and Hedging Activities”.