v3.26.1
Financial Instruments (Schedule of Cash Flow Hedges) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2026
Mar. 31, 2025
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Derivative Gain or (Loss) Recognized in Other Comprehensive Income (Loss) on the Consolidated Statement of Comprehensive Income (Loss) $ (2,190) $ (209,046) $ 46,908 $ (262,562)
Amount of Derivative Gain or (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) on the Consolidated Balance Sheet into the Consolidated Statement of Income (48,760) (8,160) (35,485) 21,344
Commodity Contracts | Operating Revenues        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Derivative Gain or (Loss) Recognized in Other Comprehensive Income (Loss) on the Consolidated Statement of Comprehensive Income (Loss) (1,739) (208,829) 47,141 (260,738)
Amount of Derivative Gain or (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) on the Consolidated Balance Sheet into the Consolidated Statement of Income (48,694) (7,834) (35,299) 21,894
Foreign Currency Contracts | Operating Revenues        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Derivative Gain or (Loss) Recognized in Other Comprehensive Income (Loss) on the Consolidated Statement of Comprehensive Income (Loss) (451) (217) (233) (1,824)
Amount of Derivative Gain or (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) on the Consolidated Balance Sheet into the Consolidated Statement of Income $ (66) $ (326) $ (186) $ (550)