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Segment Information
 3 Months Ended
Dec. 31, 2022
Segment Reporting [Abstract]  
Segment Information Segment Information
 We manage and review our consolidated operations through the following reportable segments:

•The distribution segment is primarily comprised of our regulated natural gas distribution and related sales operations in eight states.
•The pipeline and storage segment is comprised primarily of the pipeline and storage operations of our Atmos Pipeline-Texas division and our natural gas transmission operations in Louisiana.

The accounting policies of the segments are the same as those described in the summary of significant accounting policies found in our Annual Report on Form 10-K for the fiscal year ended September 30, 2022.
Income statements and capital expenditures for the three months ended December 31, 2022 and 2021 by segment are presented in the following tables:
 Three Months Ended December 31, 2022
 DistributionPipeline and StorageEliminationsConsolidated
 (In thousands)
Operating revenues from external parties$1,439,693 $44,316 $— $1,484,009 
Intersegment revenues733 142,313 (143,046)— 
Total operating revenues1,440,426 186,629 (143,046)1,484,009 
Purchased gas cost
881,915 (858)(142,808)738,249 
Operation and maintenance expense136,469 48,785 (238)185,016 
Depreciation and amortization expense105,664 40,356 — 146,020 
Taxes, other than income84,622 8,916 — 93,538 
Operating income231,756 89,430 — 321,186 
Other non-operating income6,774 14,417 — 21,191 
Interest charges22,839 13,921 — 36,760 
Income before income taxes
215,691 89,926 — 305,617 
Income tax expense21,223 12,534 — 33,757 
Net income$194,468 $77,392 $— $271,860 
Capital expenditures$443,544 $352,116 $— $795,660 

 Three Months Ended December 31, 2021
 DistributionPipeline and StorageEliminationsConsolidated
 (In thousands)
Operating revenues from external parties$971,636 $41,150 $— $1,012,786 
Intersegment revenues786 121,768 (122,554)— 
Total operating revenues972,422 162,918 (122,554)1,012,786 
Purchased gas cost
496,799 (3,411)(122,225)371,163 
Operation and maintenance expense123,284 36,155 (329)159,110 
Depreciation and amortization expense92,797 35,059 — 127,856 
Taxes, other than income69,045 9,751 — 78,796 
Operating income190,497 85,364 — 275,861 
Other non-operating income1,916 6,786 — 8,702 
Interest charges8,548 11,303 — 19,851 
Income before income taxes
183,865 80,847 — 264,712 
Income tax expense4,294 11,209 — 15,503 
Net income$179,571 $69,638 $— $249,209 
Capital expenditures$437,382 $246,798 $— $684,180 
Balance sheet information at December 31, 2022 and September 30, 2022 by segment is presented in the following tables:
 December 31, 2022
 DistributionPipeline and StorageEliminationsConsolidated
 (In thousands)
Net property, plant and equipment$13,155,891 $4,815,777 $— $17,971,668 
Total assets$22,595,795 $5,113,402 $(4,343,036)$23,366,161 
 September 30, 2022
 DistributionPipeline and StorageEliminationsConsolidated
 (In thousands)
Net property, plant and equipment$12,723,532 $4,516,707 $— $17,240,239 
Total assets$21,424,586 $4,797,206 $(4,028,803)$22,192,989