CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2023	Sep. 30, 2023
ASSETS
Property, plant and equipment	$ 23,683,937	$ 22,898,374
Less accumulated depreciation and amortization	3,364,456	3,291,791
Net property, plant and equipment	20,319,481	19,606,583
Current assets
Cash and cash equivalents	278,315	15,404
Restricted cash and cash equivalents	7,130	3,844
Cash and cash equivalents and restricted cash and cash equivalents	285,445	19,248
Accounts receivable, net (See Note 6)	646,401	328,654
Gas stored underground	220,944	245,830
Other current assets	526,927	292,036
Total current assets	1,679,717	885,768
Securitized intangible asset, net (See Note 9)	90,036	92,202
Goodwill	731,257	731,257
Deferred charges and other assets	863,752	1,201,158
Total assets	23,684,243	22,516,968
Shareholders’ equity
Common stock, no par value (stated at $0.005 per share); 200,000,000 shares authorized; issued and outstanding: December 31, 2023 — 150,834,397 shares; September 30, 2023 — 148,492,783 shares	754	742
Additional paid-in capital	6,945,795	6,684,120
Accumulated other comprehensive income	468,592	518,528
Retained earnings	3,858,068	3,666,674
Shareholders’ equity	11,273,209	10,870,064
Long-term debt, net	7,444,195	6,554,133
Securitized long-term debt (See Note 9)	85,078	85,078
Total capitalization	18,802,482	17,509,275
Current liabilities
Accounts payable and accrued liabilities	416,694	336,083
Other current liabilities	742,304	763,086
Short-term debt	0	241,933
Current maturities of long-term debt	1,561	1,568
Current maturities of securitized long-term debt (See Note 9)	9,922	9,922
Total current liabilities	1,170,481	1,352,592
Deferred income taxes	2,379,421	2,304,974
Regulatory excess deferred taxes	231,981	253,212
Regulatory cost of removal obligation	498,135	497,017
Deferred credits and other liabilities	601,743	599,898
Total capitalization and liabilities	$ 23,684,243	$ 22,516,968