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Details of Selected Financial Statement Captions (Tables)

12 Months Ended

Sep. 30, 2023

Balance Sheet Related Disclosures [Abstract]

Accounts receivable was comprised of the following at September 30, 2023 and 2022:


	September 30
	2023		2022
	(In thousands)
Billed accounts receivable	$	198,976	$	258,333
Unbilled revenue	105,743		121,518
Contributions in aid of construction receivable	17,184		5,390
Insurance receivable	33,697		13,160
Other accounts receivable	13,894		15,300
Total accounts receivable	369,494		413,701
Less: allowance for uncollectible accounts	(40,840)		(49,993)
Net accounts receivable	$	328,654	$	363,708

Schedule of Other Current Assets

Other current assets as of September 30, 2023 and 2022 were comprised of the following accounts.


	September 30
	2023		2022
	(In thousands)
Deferred gas costs	$	148,297	$	119,742
Winter Storm Uri incremental costs	21,213		2,020,954
Prepaid expenses	58,029		58,551
Taxes receivable	13,918		11,911
Materials and supplies	34,297		25,880
Assets from risk management activities	4,071		26,207
Other	12,211		11,245
Total	$	292,036	$	2,274,490

Schedule of Property, Plant and Equipment

Property, plant and equipment was comprised of the following as of September 30, 2023 and 2022:


	September 30
	2023		2022
	(In thousands)

Storage plant	$	668,237	$	589,210
Transmission plant	4,995,579		4,325,540
Distribution plant	15,283,965		13,511,409
General plant	972,054		937,500
Intangible plant	38,612		38,612
	21,958,447		19,402,271
Construction in progress	939,927		835,868
	22,898,374		20,238,139
Less: accumulated depreciation and amortization	(3,291,791)		(2,997,900)
Net property, plant and equipment (1)	$	19,606,583	$	17,240,239

(1) Net property, plant and equipment includes plant acquisition adjustments of $(24.8) million and $(26.6) million at September 30, 2023 and 2022.

Schedule of Deferred Charges and Other Assets

Deferred charges and other assets as of September 30, 2023 and 2022 were comprised of the following accounts.


	September 30
	2023		2022
	(In thousands)
Marketable securities	$	104,602	$	96,012
Regulatory assets (See Note 3)	364,741		368,375
Operating lease right of use assets (See Note 7)	223,366		214,663
Winter Storm Uri incremental costs	10,902		88,500
Assets from risk management activities	381,593		355,784
Pension assets	92,648		29,498

Other	23,306		20,968
Total	$	1,201,158	$	1,173,800

Schedule of Accounts Payable and Accrued Liabilities

Accounts payable and accrued liabilities as of September 30, 2023 and 2022 were comprised of the following accounts.


	September 30
	2023		2022
	(In thousands)
Trade accounts payable	$	218,181	$	258,506
Accrued gas payable	43,688		157,942
Accrued liabilities	74,214		79,571
Total	$	336,083	$	496,019

Schedule of Other Current Liabilities

Other current liabilities as of September 30, 2023 and 2022 were comprised of the following accounts.


	September 30
	2023		2022
	(In thousands)
Customer credit balances and deposits	$	65,266	$	56,016
Accrued employee costs	50,042		47,661
Deferred gas costs	23,093		28,834
Operating lease liabilities (See Note 7)	35,820		38,644
Accrued interest	78,939		59,542
Liabilities from risk management activities	14,584		3,000
Taxes payable	195,468		189,239
Pension and postretirement liabilities	9,375		9,721

Regulatory cost of removal obligation	85,850		80,676
APT annual adjustment mechanism	34,550		18,034
Regulatory excess deferred taxes (See Note 15)	131,301		159,808

Other	38,798		28,982
Total	$	763,086	$	720,157

Schedule of Deferred Credits and Other Liabilities

Deferred credits and other liabilities as of September 30, 2023 and 2022 were comprised of the following accounts.


	September 30
	2023		2022
	(In thousands)
Pension and postretirement liabilities	$	66,523	$	91,596
Operating lease liabilities (See Note 7)	194,452		184,301
Customer advances for construction	9,158		8,628
Other regulatory liabilities (See Note 3)	242,049		178,990
Asset retirement obligation	5,174		5,737
Liabilities from risk management activities	824		1,129
APT annual adjustment mechanism	15,344		13,104
Unrecognized tax benefits (See Note 15)	46,620		39,908
Other	19,754		14,909
Total	$	599,898	$	538,302

Schedule of Other Non-operating Income (Expense)

Other non-operating income (expense) for the fiscal years ended September 30, 2023, 2022 and 2021 were comprised of the following accounts.


	Year Ended September 30
	2023		2022		2021
	(In thousands)
Equity component of AFUDC	$	64,019	$	45,505	$	32,749
Performance-based rate program	7,093		8,327		6,362
Pension and other postretirement non-service credit (cost)	8,955		8,337		(19,238)
Interest income	7,207		2,781		2,144
Community support spending	(12,027)		(16,357)		(14,460)
Unrealized gains (losses) on equity securities	1,406		(7,737)		(860)
Miscellaneous	(6,878)		(7,119)		(8,842)
Total	$	69,775	$	33,737	$	(2,145)

Schedule of Supplemental Cash Flow Disclosures

Supplemental disclosures of cash flow information for the fiscal years ended September 30, 2023, 2022 and 2021 were as follows:


	Year Ended September 30
	2023		2022		2021
	(In thousands)
Cash Paid (Received) During The Period For:
Interest (1)	$	249,066	$	234,297	$	207,555
Income taxes	$	14,968	$	15,760	$	8,199
Non-Cash Transactions:
Capital expenditures included in current liabilities	$	186,912	$	217,868	$	184,786

(1) Cash paid during the period for interest, net of amounts capitalized was $117.9 million, $98.4 million and $81.9 million for the fiscal years ended September 30, 2023, 2022 and 2021.