Financial Instruments (Tables)

6 Months Ended

Mar. 31, 2023

Financial Instruments, Owned, at Fair Value, by Type, Alternative [Abstract]

Long-Term Debt

Based on these criteria, the fair market value of long-term debt, including current portion, was as follows (in thousands): 

	March 31, 2023				September 30, 2022
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Long-Term Debt	$	2,085,235	$	1,951,250	$	2,632,409	$	2,453,209

Schedule Of Other Investments

The components of the Company's Other Investments are as follows (in thousands):

	At March 31, 2023		At September 30, 2022
Life Insurance Contracts	$	42,745	$	42,171
Equity Mutual Fund	15,924		19,506
Fixed Income Mutual Fund	15,949		33,348
	$	74,618	$	95,025

Schedule of Derivative Financial Instruments Designated And Qualifying As Cash Flow Hedges On The Statement Of Financial Performance

The Effect of Derivative Financial Instruments on the Statement of Financial Performance for the
Three Months Ended March 31, 2023 and 2022 (Thousands of Dollars)
Derivatives in Cash Flow Hedging Relationships	Amount of Derivative Gain or (Loss) Recognized in Other Comprehensive Income (Loss) on the Consolidated Statement of Comprehensive Income (Loss) for the  Three Months Ended  March 31,				Location of Derivative Gain or (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) on the Consolidated Balance Sheet into the Consolidated Statement of Income	Amount of Derivative Gain or (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) on the Consolidated Balance Sheet into the Consolidated Statement of Income for the  Three Months Ended  March 31,
	2023		2022			2023		2022
Commodity Contracts	$	310,623	$	(642,240)	Operating Revenue	$	(18,768)	$	(130,271)
Foreign Currency Contracts	(79)		634		Operating Revenue	(172)		50
Total	$	310,544	$	(641,606)		$	(18,940)	$	(130,221)

The Effect of Derivative Financial Instruments on the Statement of Financial Performance for the
Six Months Ended March 31, 2023 and 2022 (Thousands of Dollars)
Derivatives in Cash Flow Hedging Relationships	Amount of Derivative Gain or (Loss) Recognized in Other Comprehensive Income (Loss) on the Consolidated Statement of Comprehensive Income (Loss) for the  Six Months Ended March 31,				Location of Derivative Gain or (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) on the Consolidated Balance Sheet into the Consolidated Statement of Income	Amount of Derivative Gain or (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) on the Consolidated Balance Sheet into the Consolidated Statement of Income for the  Six Months Ended  March 31,
	2023		2022			2023		2022
Commodity Contracts	$	607,743	$	(479,114)	Operating Revenue	$	(177,930)	$	(292,899)
Foreign Currency Contracts	394		640		Operating Revenue	(351)		90
Total	$	608,137	$	(478,474)		$	(178,281)	$	(292,809)