Derivatives and Hedging - Schedule of Derivatives Instruments for Gains or Losses Initially Recognized in AOCI in Consolidated Balance Sheet (Detail) - Derivatives Designated as Hedging Instruments - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Nov. 30, 2021	Nov. 30, 2020	Nov. 30, 2021	Nov. 30, 2020
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Pretax gain/(loss) recognized in AOCI	$ 16,465	$ (1,055)	$ 30,179	$ (32,141)
Pretax gain/(loss) reclassified from AOCI into income	3,221	(611)	5,836	(8,642)
Interest Rate Swap | Interest (Expense) Income | Cash Flow
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Pretax gain/(loss) recognized in AOCI	868	(149)	832	(747)
Pretax gain/(loss) reclassified from AOCI into income, cash flow	(930)	(846)	$ (1,860)	(1,613)
Income Statement Location			Interest (expense) income
Cross Currency Swap | Interest (Expense) Income | Cash Flow
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Pretax gain/(loss) recognized in AOCI	4,157	51	$ 7,604	(7,304)
Pretax gain/(loss) reclassified from AOCI into income, cash flow	138	160	$ 276	351
Income Statement Location			Interest (expense) income
Cross Currency Swap | Foreign exchange gain (loss) | Cash Flow
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Pretax gain/(loss) reclassified from AOCI into income, cash flow	4,013	75	$ 7,420	(7,380)
Income Statement Location			Foreign exchange gain (loss)
Cross Currency Swap | Gain or (loss) on sale of subsidiary | Net Investment
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Pretax gain/(loss) recognized in AOCI	$ 11,440	$ (957)	$ 21,743	$ (24,090)
Income Statement Location			Gain or (loss) on sale of subsidiary