Derivative Instruments and Hedging Activities - Effect on Comprehensive Income and Change in FV (Details) - Commodity Derivatives Propane [Member] - USD ($) $ in Thousands	3 Months Ended
Oct. 31, 2022	Oct. 31, 2021
Derivative [Line Items]
Amount of gain (loss) recognized in AOCI on derivative	$ (36,185)	$ 72,932
Cost of Sales [Member]
Derivative [Line Items]
Amount of gain (loss) reclassified from AOCI into income	12,788	22,610
Amount of gain (loss) reclassified, ineffective portion	$ 0	$ 0

The portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments representing (a) the amount of the hedge ineffectiveness and (b) the amount, if any, excluded from the assessment of hedge effectiveness.

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Amount, before tax and reclassification, of gain (loss) from derivative instrument designated and qualifying cash flow hedge included in assessment of hedge effectiveness.

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