Details of Selected Consolidated Balance Sheet Captions (Tables)

12 Months Ended

Sep. 30, 2022

Balance Sheet Related Disclosures [Abstract]

Schedule of Accounts Receivables

Accounts receivable was comprised of the following at September 30, 2022 and 2021:

	September 30
	2022		2021
	(In thousands)
Billed accounts receivable	$	258,333	$	218,219
Unbilled revenue	121,518		97,417
Contributions in aid of construction receivable	5,390		18,984
Insurance receivable	13,160		53,779
Other accounts receivable	15,300		19,039
Total accounts receivable	413,701		407,438
Less: allowance for uncollectible accounts	(49,993)		(64,471)
Net accounts receivable	$	363,708	$	342,967

Schedule of Other Current Assets

Other current assets as of September 30, 2022 and 2021 were comprised of the following accounts.

	September 30
	2022		2021
	(In thousands)
Deferred gas costs	$	119,742	$	66,395
Winter Storm Uri incremental costs	2,020,954		2,011,719
Prepaid expenses	58,551		48,766
Taxes receivable	11,911		—
Materials and supplies	25,880		15,581
Assets from risk management activities	26,207		55,073
Other	11,245		3,375
Total	$	2,274,490	$	2,200,909

Schedule of Property, Plant and Equipment

Property, plant and equipment was comprised of the following as of September 30, 2022 and 2021:

	September 30
	2022		2021
	(In thousands)
Storage plant	$	589,210	$	539,972
Transmission plant	4,325,540		3,725,347
Distribution plant	13,511,409		12,085,654
General plant	937,500		868,962
Intangible plant	38,612		38,612
	19,402,271		17,258,547
Construction in progress	835,868		626,551
	20,238,139		17,885,098
Less: accumulated depreciation and amortization	(2,997,900)		(2,821,128)
Net property, plant and equipment (1)	$	17,240,239	$	15,063,970

(1)     Net property, plant and equipment includes plant acquisition adjustments of $(26.6) million and $(28.5) million at September 30, 2022 and 2021.

Schedule of Deferred Charges and Other Assets

Deferred charges and other assets as of September 30, 2022 and 2021 were comprised of the following accounts.

	September 30
	2022		2021
	(In thousands)
Marketable securities	$	96,012	$	108,071
Regulatory assets (See Note 2)	368,375		351,843
Operating lease right of use assets (See Note 6)	214,663		222,446
Winter Storm Uri incremental costs	88,500		89,009
Assets from risk management activities	355,784		175,613
Pension assets	29,498		—
Other	20,968		27,738
Total	$	1,173,800	$	974,720

Schedule of Accounts Payable and Accrued Liabilities

Accounts payable and accrued liabilities as of September 30, 2022 and 2021 were comprised of the following accounts.

	September 30
	2022		2021
	(In thousands)
Trade accounts payable	$	258,506	$	224,873
Accrued gas payable	157,942		100,699
Accrued liabilities	79,571		97,650
Total	$	496,019	$	423,222

Schedule of Other Current Liabilities

Other current liabilities as of September 30, 2022 and 2021 were comprised of the following accounts.

	September 30
	2022		2021
	(In thousands)
Customer credit balances and deposits	$	56,016	$	49,722
Accrued employee costs	47,661		50,517
Deferred gas costs	28,834		52,553
Operating lease liabilities (See Note 6)	38,644		37,688
Accrued interest	59,542		55,164
Liabilities from risk management activities	3,000		5,269
Taxes payable	189,239		160,986
Pension and postretirement liabilities	9,721		4,863
Regulatory cost of removal obligation	80,676		72,823
APT annual adjustment mechanism	18,034		22,694
Regulatory excess deferred taxes (See Note 14)	159,808		155,857
Other	28,982		18,545
Total	$	720,157	$	686,681

Schedule of Deferred Credits and Other Liabilities

Deferred credits and other liabilities as of September 30, 2022 and 2021 were comprised of the following accounts.

	September 30
	2022		2021
	(In thousands)
Pension and postretirement liabilities	$	91,596	$	185,617
Operating lease liabilities (See Note 6)	184,301		194,745
Customer advances for construction	8,628		9,879
Other regulatory liabilities (See Note 2)	178,990		75,506
Asset retirement obligation	5,737		18,373
Liabilities from risk management activities	1,129		—
APT annual adjustment mechanism	13,104		8,416
Unrecognized tax benefits (See Note 14)	39,908		32,792
Other	14,909		12,161
Total	$	538,302	$	537,489

Schedule of Other Non-Operating Income (Expense)

Other non-operating income (expense) for the fiscal years ended September 30, 2022, 2021 and 2020 were comprised of the following accounts.

	Year Ended September 30
	2022		2021		2020
	(In thousands)
Equity component of AFUDC	$	45,505	$	32,749	$	23,493
Performance-based rate program	8,327		6,362		6,771
Pension and other postretirement non-service credit (cost)	8,337		(19,238)		(3,189)
Interest income	2,781		2,144		2,932
Community support spending	(16,357)		(14,460)		(11,728)
Unrealized losses on equity securities	(7,737)		(860)		(4,176)
Miscellaneous	(7,119)		(8,842)		(6,932)
Total	$	33,737	$	(2,145)	$	7,171

Schedule of Supplemental Cash Flow Disclosures

Supplemental disclosures of cash flow information for the fiscal years ended September 30, 2022, 2021 and 2020 were as follows:

	Year Ended September 30
	2022		2021		2020
	(In thousands)
Cash Paid (Received) During The Period For:
Interest (1)	$	234,297	$	207,555	$	194,993
Income taxes	$	15,760	$	8,199	$	(3,071)
Non-Cash Transactions:
Capital expenditures included in current liabilities	$	217,868	$	184,786	$	113,365

(1)    Cash paid during the period for interest, net of amounts capitalized was $98.4 million, $81.9 million and $82.3 million for the fiscal years ended September 30, 2022, 2021 and 2020.