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	12 Months Ended
	May 31, 2022	May 31, 2021	May 31, 2020
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Pretax gain/(loss) recognized in AOCI	$ 60,473	$ (41,813)	$ (8,386)
Pretax gain/(loss) reclassified from AOCI into income	12,097	(12,616)	(1,930)
Interest Rate Swap | Interest (Expense) Income | Cash Flow
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Pretax gain/(loss) recognized in AOCI	4,508	(1,226)	(7,998)
Pretax gain/(loss) reclassified from AOCI into income, cash flow	(3,272)	(3,380)	170
Cross Currency Swap | Interest Income | Cash Flow
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Pretax gain/(loss) recognized in AOCI	15,494	(9,207)	(2,254)
Pretax gain/(loss) reclassified from AOCI into income, cash flow	611	638	554
Cross Currency Swap | Foreign Exchange (Loss) | Cash Flow
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Pretax gain/(loss) reclassified from AOCI into income, cash flow	14,758	(9,874)	(2,654)
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	$ 40,471	$ (31,380)	$ 1,866