Derivative Instruments and Hedging Activities - Effect on Comprehensive Income and Change in FV (Details) - Commodity Derivatives Propane [Member] - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2020
Derivative [Line Items]
Amount of gain (loss) recognized in AOCI on derivative	$ 68,950	$ 136,351
Amount of gain (loss) recognized in AOCI on derivative, pre-adoption			$ (22,872)
Cost of Sales [Member]
Derivative [Line Items]
Amount of gain (loss) reclassified from AOCI into income	120,429	44,252
Amount of gain (loss) reclassified from AOCI into income, pre-adoption			(35,315)
Amount of gain (loss) reclassified, ineffective portion	$ 0	$ 0	$ 0