Derivative Financial Instruments and Hedging Activities - Derivatives (Details) $ in Thousands, bbl in Millions	6 Months Ended	12 Months Ended
	Feb. 28, 2023 USD ($) bbl	Aug. 31, 2022 USD ($) bbl
Derivative [Line Items]
Derivative Liability, Noncurrent	$ 2,800	$ 4,000
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	432,810	504,355
Derivative Asset, Fair Value, Gross Amount Not Offset on Balance Sheet	15,754	12,735
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	282,638	368,041
Derivative Liability, Collateral, Right to Reclaim Cash, Offset	1,476	1,424
Derivative Liability, Fair Value, Gross Amount Not Offset on Balance Sheet	15,754	21,475
Derivative Asset, Noncurrent, Excluding Fair Value Hedges	2,300	8,500
Foreign exchange derivatives | Not Designated as Hedging Instrument
Derivative [Line Items]
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	49,688	44,022
Derivative Asset, Fair Value, Gross Amount Not Offset on Balance Sheet	7,274	8,901
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	3,982	3,748
Derivative Liability, Collateral, Right to Reclaim Cash, Offset	0	0
Derivative Liability, Fair Value, Gross Amount Not Offset on Balance Sheet	7,274	8,901
Derivative, Notional Amount	1,500,000	1,900,000
Commodity derivatives | Not Designated as Hedging Instrument
Derivative [Line Items]
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	383,122	460,333
Derivative Asset, Fair Value, Gross Amount Not Offset on Balance Sheet	8,480	3,834
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	278,656	364,293
Derivative Liability, Collateral, Right to Reclaim Cash, Offset	1,476	1,424
Derivative Liability, Fair Value, Gross Amount Not Offset on Balance Sheet	$ 8,480	$ 12,574
Cash Flow Hedging
Derivative [Line Items]
Aggregate notional amount of cash flow hedges (in barrels) | bbl	1.8	3.8