Derivative Instruments - Summary of Gross Notional Values (Details) - Cash flow hedging - Designated as hedging instrument $ in Thousands, € in Millions, £ in Millions, ₱ in Billions, ₨ in Billions	May 31, 2020 PHP (₱)	May 31, 2020 INR (₨)	May 31, 2020 EUR (€)	May 31, 2020 GBP (£)	May 31, 2020 USD ($)	Aug. 31, 2019 USD ($)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross notional amount					$ 332,742	$ 113,700
Foreign currency forward contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross notional amount	₱ 466.8	₨ 830.6	€ 11.4	£ 9.5	45,242	113,700
Interest rate swap agreement
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross notional amount					$ 287,500	$ 0