Summary Of Significant Accounting Policies (Reclassification Out Of Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Reclassification Adjustment out of Accumulated Other Comprehensive Loss [Line Items]
Operating Revenues	$ 502,624	$ 394,397	$ 1,750,900	$ 1,386,671
Income Before Income Taxes	141,075	116,810	543,151	376,647
Income Tax Expense	(32,917)	(30,335)	(135,272)	(99,962)
Net Income Available for Common Stock	108,158	86,475	407,879	276,685
Amount Of Gain Or (Loss) Reclassified From Accumulated Other Comprehensive Loss [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Loss [Line Items]
Income Before Income Taxes	(298,371)	(13,129)	(591,180)	(17,106)
Income Tax Expense	81,663	3,617	161,803	4,713
Net Income Available for Common Stock	(216,708)	(9,512)	(429,377)	(12,393)
Amount Of Gain Or (Loss) Reclassified From Accumulated Other Comprehensive Loss [Member] | Commodity Contracts [Member] | Gains And Losses On Derivative Financial Instruments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Loss [Line Items]
Operating Revenues	(298,372)	(13,281)	(591,271)	(17,351)
Foreign Currency Contracts [Member] | Amount Of Gain Or (Loss) Reclassified From Accumulated Other Comprehensive Loss [Member] | Gains And Losses On Derivative Financial Instruments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Loss [Line Items]
Operating Revenues	$ 1	$ 152	$ 91	$ 245