Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2021	Sep. 30, 2020
ASSETS
Property, Plant and Equipment	$ 12,648,604	$ 12,351,852
Less - Accumulated Depreciation, Depletion and Amortization	6,572,534	6,353,785
Property, Plant and Equipment, Net, Total	6,076,070	5,998,067
Assets Held for Sale, Net	0	53,424
Current Assets
Cash and Temporary Cash Investments	80,467	20,541
Receivables - Net of Allowance for Uncollectible Accounts of $30,128 and $22,810, Respectively	229,479	143,583
Unbilled Revenue	32,685	17,302
Gas Stored Underground	5,745	33,338
Materials, Supplies and Emission Allowances	52,212	51,877
Unrecovered Purchased Gas Costs	479	0
Other Current Assets	56,117	47,557
Total Current Assets	457,184	314,198
Other Assets
Recoverable Future Taxes	117,300	118,310
Unamortized Debt Expense	11,443	12,297
Other Regulatory Assets	147,099	156,106
Deferred Charges	60,454	67,131
Other Investments	147,421	154,502
Goodwill	5,476	5,476
Prepaid Post-Retirement Benefit Costs	89,101	76,035
Fair Value of Derivative Financial Instruments	4,104	9,308
Other	0	81
Total Other Assets	582,398	599,246
Total Assets	7,115,652	6,964,935
Capitalization:
Common Stock, $1 Par Value Authorized - 200,000,000 Shares; Issued and Outstanding - 91,163,797 Shares and 90,954,696 Shares, Respectively	91,164	90,955
Paid in Capital	1,009,075	1,004,158
Earnings Reinvested in the Business	1,100,718	991,630
Accumulated Other Comprehensive Loss	(101,988)	(114,757)
Total Comprehensive Shareholders’ Equity	2,098,969	1,971,986
Long-Term Debt, Net of Current Portion and Unamortized Discount and Debt Issuance Costs	2,627,033	2,629,576
Total Capitalization	4,726,002	4,601,562
Current and Accrued Liabilities
Notes Payable to Banks and Commercial Paper	0	30,000
Accounts Payable	107,305	134,126
Amounts Payable to Customers	19,768	10,788
Dividends Payable	40,562	40,475
Interest Payable on Long-Term Debt	17,663	27,521
Customer Advances	0	15,319
Customer Security Deposits	19,503	17,199
Other Accruals and Current Liabilities	176,940	140,176
Fair Value of Derivative Financial Instruments	21,231	43,969
Total Current and Accrued Liabilities	402,972	459,573
Deferred Credits
Deferred Income Taxes	763,441	696,054
Taxes Refundable to Customers	355,375	357,508
Cost of Removal Regulatory Liability	237,867	230,079
Other Regulatory Liabilities	177,685	161,573
Pension and Other Post-Retirement Liabilities	118,804	127,181
Asset Retirement Obligations	192,127	192,228
Other Deferred Credits	141,379	139,177
Total Deferred Credits	1,986,678	1,903,800
Commitments and Contingencies (Note 8)	0	0
Total Capitalization and Liabilities	$ 7,115,652	$ 6,964,935