CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2022	Sep. 30, 2022
ASSETS
Property, plant and equipment	$ 20,987,313	$ 20,238,139
Less accumulated depreciation and amortization	3,015,645	2,997,900
Net property, plant and equipment	17,971,668	17,240,239
Current assets
Cash and cash equivalents	171,597	51,554
Accounts receivable, net (See Note 5)	826,416	363,708
Gas stored underground	323,678	357,941
Other current assets (See Note 8)	2,306,072	2,274,490
Total current assets	3,627,763	3,047,693
Goodwill	731,257	731,257
Deferred charges and other assets (See Note 8)	1,035,473	1,173,800
Total assets	23,366,161	22,192,989
Shareholders’ equity
Common stock, no par value (stated at $0.005 per share); 200,000,000 shares authorized; issued and outstanding: December 31, 2022 — 143,155,761 shares; September 30, 2022 — 140,896,598 shares	716	704
Additional paid-in capital	6,065,763	5,838,118
Accumulated other comprehensive income	391,330	369,112
Retained earnings	3,378,465	3,211,157
Shareholders’ equity	9,836,274	9,419,091
Long-term debt	6,551,795	5,760,647
Total capitalization	16,388,069	15,179,738
Current liabilities
Accounts payable and accrued liabilities	574,723	496,019
Other current liabilities	755,687	720,157
Short-term debt	0	184,967
Current maturities of long-term debt	2,201,484	2,201,457
Total current liabilities	3,531,894	3,602,600
Deferred income taxes	2,075,596	1,999,505
Regulatory excess deferred taxes	345,799	385,213
Regulatory cost of removal obligation	494,626	487,631
Deferred credits and other liabilities	530,177	538,302
Total capitalization and liabilities	$ 23,366,161	$ 22,192,989