Consolidated Statements Of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
OPERATING ACTIVITIES
Net Income Available for Common Stock	$ 44,986	$ 133,020
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Impairment of Assets	141,802	0
Depreciation, Depletion and Amortization	109,370	115,790
Deferred Income Taxes	(5,385)	38,362
Stock-Based Compensation	4,705	4,660
Other	7,146	8,041
Change in:
Receivables and Unbilled Revenue	(115,165)	(58,459)
Gas Stored Underground and Materials and Supplies	10,180	6,915
Other Current Assets	8,814	892
Accounts Payable	9,703	(3,355)
Amounts Payable to Customers	(133)	1,013
Customer Advances	(4,078)	2,083
Customer Security Deposits	(174)	2,079
Other Accruals and Current Liabilities	21,266	28,612
Other Assets	(3,892)	(6,306)
Other Liabilities	(9,057)	(2,403)
Net Cash Provided by Operating Activities	220,088	270,944
INVESTING ACTIVITIES
Capital Expenditures	(240,427)	(246,938)
Other	5,878	(920)
Net Cash Used in Investing Activities	(234,549)	(247,858)
FINANCING ACTIVITIES
Changes in Notes Payable to Banks and Commercial Paper	109,300	12,500
Shares Repurchased Under Repurchase Plan	(33,524)	0
Dividends Paid on Common Stock	(46,872)	(45,451)
Net Repurchases of Common Stock Under Stock and Benefit Plans	(3,971)	(3,897)
Net Cash Provided by (Used in) Financing Activities	24,933	(36,848)
Net Increase (Decrease) in Cash and Cash Equivalents	10,472	(13,762)
Cash and Cash Equivalents at October 1	38,222	55,447
Cash and Cash Equivalents at December 31	48,694	41,685
Supplemental Disclosure of Cash Flow Information
Non-Cash Capital Expenditures	$ 71,616	$ 97,922