Segment Information (Table)

12 Months Ended

Sep. 30, 2020

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment

Income statements and capital expenditures by segment are shown in the following tables.

	Year Ended September 30, 2020
	Distribution			Pipeline and Storage		Eliminations			Consolidated
	(In thousands)
Operating revenues from external parties	$	2,624,251		$	196,886	$	—		$	2,821,137
Intersegment revenues	2,742			412,453		(415,195		)	—
Total operating revenues	2,626,993			609,339		(415,195		)	2,821,137
Purchased gas cost	1,071,227			1,548		(413,921		)	658,854
Operation and maintenance expense	472,760			158,115		(1,274		)	629,601
Depreciation and amortization expense	309,582			120,246		—			429,828
Taxes, other than income	245,181			33,574		—			278,755
Operating income	528,243			295,856		—			824,099
Other non-operating income (expense)	(1,265		)	8,436		—			7,171
Interest charges	39,634			44,840		—			84,474
Income before income taxes	487,344			259,452		—			746,796
Income tax expense	91,680			53,673		—			145,353
Net income	$	395,664		$	205,779	$	—		$	601,443
Capital expenditures	$	1,466,631		$	469,045	$	—		$	1,935,676

	Year Ended September 30, 2019
	Distribution		Pipeline and Storage			Eliminations			Consolidated
	(In thousands)
Operating revenues from external parties	$	2,742,824	$	159,024		$	—		$	2,901,848
Intersegment revenues	2,637		408,000			(410,637		)	—
Total operating revenues	2,745,461		567,024			(410,637		)	2,901,848
Purchased gas cost	1,268,591		(360		)	(409,394		)	858,837
Operation and maintenance expense	480,222		151,329			(1,243		)	630,308
Depreciation and amortization expense	283,697		107,759			—			391,456
Taxes, other than income	242,179		33,010			—			275,189
Operating income	470,772		275,286			—			746,058
Other non-operating income	6,241		1,163			—			7,404
Interest charges	60,031		43,122			—			103,153
Income before income taxes	416,982		233,327			—			650,309
Income tax expense	88,168		50,735			—			138,903
Net income	$	328,814	$	182,592		$	—		$	511,406
Capital expenditures	$	1,274,613	$	418,864		$	—		$	1,693,477

	Year Ended September 30, 2018
	Distribution			Pipeline and Storage			Eliminations			Consolidated
	(In thousands)
Operating revenues from external parties	$	3,000,404		$	115,142		$	—		$	3,115,546
Intersegment revenues	2,643			392,571			(395,214		)	—
Total operating revenues	3,003,047			507,713			(395,214		)	3,115,546
Purchased gas cost	1,559,836			1,978			(393,966		)	1,167,848
Operation and maintenance expense	461,048			134,995			(1,248		)	594,795
Depreciation and amortization expense	264,930			96,153			—			361,083
Taxes, other than income	231,566			32,320			—			263,886
Operating income	485,667			242,267			—			727,934
Other non-operating expense	(6,649		)	(3,495		)	—			(10,144		)
Interest charges	65,850			40,796			—			106,646
Income before income taxes	413,168			197,976			—			611,144
Income tax expense (benefit)	(29,798		)	37,878			—			8,080
Net income	$	442,966		$	160,098		$	—		$	603,064
Capital expenditures	$	1,025,800		$	441,791		$	—		$	1,467,591

The following table summarizes our revenues from external parties, excluding intersegment revenues, by products and services for the fiscal years ended September 30.

	2020		2019		2018
	(In thousands)
Distribution revenues:
Gas sales revenues:
Residential	$	1,717,070	$	1,733,548	$	1,916,101
Commercial	654,963		711,284		797,073
Industrial	89,641		118,046		131,267
Public authority and other	42,007		42,613		47,714
Total gas sales revenues	2,503,681		2,605,491		2,892,155
Transportation revenues	97,441		95,629		99,250
Other gas revenues	23,129		41,704		8,999
Total distribution revenues	2,624,251		2,742,824		3,000,404
Pipeline and storage revenues	196,886		159,024		115,142
Total operating revenues	$	2,821,137	$	2,901,848	$	3,115,546

Balance sheet information at September 30, 2020 and 2019 by segment is presented in the following tables.

	September 30, 2020
	Distribution		Pipeline and Storage		Eliminations			Consolidated
	(In thousands)
Property, plant and equipment, net	$	9,944,978	$	3,410,369	$	—		$	13,355,347
Total assets	$	14,578,176	$	3,647,907	$	(2,867,051	)	$	15,359,032

	September 30, 2019
	Distribution		Pipeline and Storage		Eliminations			Consolidated
	(In thousands)
Property, plant and equipment, net	$	8,737,590	$	3,050,079	$	—		$	11,787,669
Total assets	$	12,579,741	$	3,279,323	$	(2,491,445	)	$	13,367,619

Revenue from External Customers by Products and Services

The following table summarizes our revenues from external parties, excluding intersegment revenues, by products and services for the fiscal years ended September 30.

	2020		2019		2018
	(In thousands)
Distribution revenues:
Gas sales revenues:
Residential	$	1,717,070	$	1,733,548	$	1,916,101
Commercial	654,963		711,284		797,073
Industrial	89,641		118,046		131,267
Public authority and other	42,007		42,613		47,714
Total gas sales revenues	2,503,681		2,605,491		2,892,155
Transportation revenues	97,441		95,629		99,250
Other gas revenues	23,129		41,704		8,999
Total distribution revenues	2,624,251		2,742,824		3,000,404
Pipeline and storage revenues	196,886		159,024		115,142
Total operating revenues	$	2,821,137	$	2,901,848	$	3,115,546