Accumulated Other Comprehensive Income - Reclassification from AOCI (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Feb. 28, 2019	Feb. 28, 2018	Feb. 28, 2019	Feb. 28, 2018	Feb. 29, 2020
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Cost of revenue	$ 5,612,116	$ 4,903,968	$ 11,598,741	$ 10,020,215
Interest expense	(46,160)	(37,796)	(88,812)	(74,042)
Total amounts	100,826	86,262	265,713	193,701
Income tax expense	33,219	48,734	74,032	92,254
Reclassification out of AOCI | Unrealized (gains) losses on derivative instruments:
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Total amounts	3,501	(9,893)	17,686	(15,084)
Income tax expense		3,500		7,000
Reclassification out of AOCI | Unrealized (gains) losses on derivative instruments: | Scenario, Forecast
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Cost of revenue					$ 5,900
Reclassification out of AOCI | Unrealized (gains) losses on derivative instruments: | Foreign exchange contracts
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Cost of revenue	3,931	(7,381)	18,546	(10,060)
Reclassification out of AOCI | Unrealized (gains) losses on derivative instruments: | Interest rate contracts
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Interest expense	$ (430)	$ (2,512)	$ (860)	$ (5,024)