CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2025	Sep. 30, 2024
ASSETS
Property, plant and equipment	$ 28,287,941	$ 25,848,083
Less accumulated depreciation and amortization	3,909,798	3,643,716
Net property, plant and equipment	24,378,143	22,204,367
Current assets
Cash and cash equivalents	709,378	307,340
Restricted cash and cash equivalents	4,223	1,516
Cash and cash equivalents and restricted cash and cash equivalents	713,601	308,856
Accounts receivable, net	399,533	365,882
Gas stored underground	139,082	169,508
Other current assets	299,756	288,068
Total current assets	1,551,972	1,132,314
Securitized intangible asset, net (See Note 9)	77,246	82,844
Goodwill	731,257	731,257
Deferred charges and other assets	973,909	1,043,683
Total assets	27,712,527	25,194,465
Shareholders’ equity
Common stock, no par value (stated at $0.005 per share); 200,000,000 shares authorized; issued and outstanding: June 30, 2025 — 160,521,011 shares; September 30, 2024 — 155,258,845 shares	803	776
Additional paid-in capital	8,078,905	7,474,559
Accumulated other comprehensive income	477,960	465,715
Retained earnings	4,828,170	4,216,619
Shareholders’ equity	13,385,838	12,157,669
Long-term debt, net	8,907,983	7,783,646
Securitized long-term debt (See Note 9)	72,609	76,871
Total capitalization	22,366,430	20,018,186
Current liabilities
Accounts payable and accrued liabilities	397,564	445,397
Other current liabilities	712,725	750,620
Current maturities of long-term debt	11,743	1,651
Current maturities of securitized long-term debt (See Note 9)	8,418	8,207
Total current liabilities	1,130,450	1,205,875
Deferred income taxes	2,856,784	2,593,342
Regulatory excess deferred taxes	133,627	177,315
Regulatory cost of removal obligation	529,760	507,815
Deferred credits and other liabilities	695,476	691,932
Total capitalization and liabilities	$ 27,712,527	$ 25,194,465