Derivative Financial Instruments and Hedging Activities - Derivatives (Details) $ in Thousands, bbl in Millions	9 Months Ended	12 Months Ended
	May 31, 2024 USD ($) bbl	Aug. 31, 2023 USD ($) bbl
Derivative [Line Items]
Derivative Liability, Noncurrent	$ 6,100	$ 12,600
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	196,675	295,646
Derivative Asset, Fair Value, Gross Amount Not Offset on Balance Sheet	11,218	17,196
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	188,234	344,229
Derivative Liability, Collateral, Right to Reclaim Cash, Offset	1,588	1,505
Derivative Liability, Fair Value, Gross Amount Not Offset on Balance Sheet	12,786	17,196
Derivative Asset, Noncurrent, Excluding Fair Value Hedges	7,400	1,100
Foreign exchange derivatives | Not Designated as Hedging Instrument
Derivative [Line Items]
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	3,734	20,072
Derivative Asset, Fair Value, Gross Amount Not Offset on Balance Sheet	10,124	12,330
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	12,468	1,469
Derivative Liability, Collateral, Right to Reclaim Cash, Offset	0	0
Derivative Liability, Fair Value, Gross Amount Not Offset on Balance Sheet	10,124	12,330
Derivative, Notional Amount	2,200,000	1,900,000
Commodity derivatives | Not Designated as Hedging Instrument
Derivative [Line Items]
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	192,941	275,574
Derivative Asset, Fair Value, Gross Amount Not Offset on Balance Sheet	1,094	4,866
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	175,766	342,760
Derivative Liability, Collateral, Right to Reclaim Cash, Offset	1,588	1,505
Derivative Liability, Fair Value, Gross Amount Not Offset on Balance Sheet	$ 2,662	$ 4,866
Cash Flow Hedging
Derivative [Line Items]
Aggregate notional amount of cash flow hedges (in barrels) | bbl	1.7	4.1