Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Sep. 30, 2012
ASSETS
Property, Plant and Equipment	$ 6,791,637	$ 6,615,813
Less - Accumulated Depreciation, Depletion and Amortization	1,935,448	1,876,010
Property, Plant and Equipment, Net, Total	4,856,189	4,739,803
Current Assets
Cash and Temporary Cash Investments	61,017	74,494
Hedging Collateral Deposits	0	364
Receivables - Net of Allowance for Uncollectible Accounts of $34,030 and $30,317, Respectively	143,567	115,818
Unbilled Utility Revenue	47,134	19,652
Gas Stored Underground	44,485	49,795
Materials and Supplies - at average cost	29,946	28,577
Other Current Assets	49,108	56,121
Deferred Income Taxes	19,112	10,755
Total Current Assets	394,369	355,576
Other Assets
Recoverable Future Taxes	152,202	150,941
Unamortized Debt Expense	12,860	13,409
Other Regulatory Assets	551,707	546,851
Deferred Charges	6,781	7,591
Other Investments	90,513	86,774
Goodwill	5,476	5,476
Fair Value of Derivative Financial Instruments	37,135	27,616
Other	965	1,105
Total Other Assets	857,639	839,763
Total Assets	6,108,197	5,935,142
Capitalization:
Common Stock, $1 Par Value Authorized - 200,000,000 Shares; Issued and Outstanding - 83,482,125 Shares and 83,330,140 Shares, Respectively	83,482	83,330
Paid in Capital	673,607	669,501
Earnings Reinvested in the Business	1,343,765	1,306,284
Total Common Shareholders' Equity Before Items of Other Comprehensive Loss	2,100,854	2,059,115
Accumulated Other Comprehensive Loss	(84,644)	(99,020)
Total Comprehensive Shareholders' Equity	2,016,210	1,960,095
Long-Term Debt, Net of Current Portion	1,149,000	1,149,000
Total Capitalization	3,165,210	3,109,095
Current and Accrued Liabilities
Notes Payable to Banks and Commercial Paper	238,000	171,000
Current Portion of Long-Term Debt	250,000	250,000
Accounts Payable	94,909	87,985
Amounts Payable to Customers	15,278	19,964
Dividends Payable	0	30,416
Interest Payable on Long-Term Debt	16,320	29,491
Customer Advances	22,068	24,055
Customer Security Deposits	18,926	17,942
Other Accruals and Current Liabilities	103,582	79,099
Fair Value of Derivative Financial Instruments	13,816	24,527
Total Current and Accrued Liabilities	772,899	734,479
Deferred Credits
Deferred Income Taxes	1,126,551	1,065,757
Taxes Refundable to Customers	66,396	66,392
Unamortized Investment Tax Credit	1,898	2,005
Cost of Removal Regulatory Liability	147,267	139,611
Other Regulatory Liabilities	22,911	21,014
Pension and Other Post-Retirement Liabilities	514,116	516,197
Asset Retirement Obligations	123,984	119,246
Other Deferred Credits	166,965	161,346
Total Deferred Credits	2,170,088	2,091,568
Commitments and Contingencies	0	0
Total Capitalization and Liabilities	$ 6,108,197	$ 5,935,142