v3.26.1
Business Segment Information (Tables)
 9 Months Ended
Jun. 30, 2026
Segment Reporting [Abstract]  
Schedule of Financial Segment Information by Segment A listing of segment assets at June 30, 2026 and September 30, 2025 is shown in the tables below.
Quarter Ended June 30, 2026
 Integrated
Upstream
and
Gathering		Pipeline
and
Storage		UtilityTotal
Reportable
Segments
All
   Other(4)
Corporate
and
Intersegment
  Eliminations(4)
Total
Consolidated
 (Thousands)
Revenue from External Customers(1)
$302,516 $69,559 $165,422 $537,497 $— $— $537,497 
Intersegment Revenues
— 36,982 78 37,060 — (37,060)— 
  Total Revenues302,516 106,541 165,500 574,557 — (37,060)537,497 
Operation and Maintenance Expense(2):
Upstream General and Administrative Expense17,487 — — 17,487 — (63)17,424 
Lease Operating Expense15,847 — — 15,847 — (532)15,315 
Gathering Operation and Maintenance Expense13,595 — — 13,595 — (69)13,526 
All Other Operation and Maintenance Expense3,366 31,479 61,652 96,497 — 12,377 108,874 
Purchased Gas Expense(2)
— — 66,239 66,239 — (36,361)29,878 
Depreciation, Depletion and Amortization Expense(2)
83,078 19,656 18,090 120,824 — 234 121,058 
Interest Expense(2)
13,509 11,735 10,764 36,008 122 (118)36,012 
Interest Income(414)(1,129)(912)(2,455)— (1,484)(3,939)
Income Tax Expense (Benefit)(2)
40,400 9,417 (1,118)48,699 (72)(2,454)46,173 
Other Expense (Income) Items(3)
3,774 6,644 5,099 15,517 172 (1,134)14,555 
Segment Profit: Net Income (Loss)
$111,874 $28,739 $5,686 $146,299 $(222)$(7,456)$138,621 
Expenditures for Additions to Long-Lived Assets
$146,327 $91,571 $46,956 $284,854 $— $4,009 $288,863 
Nine Months Ended June 30, 2026
 Integrated
Upstream
and
Gathering		Pipeline
and
Storage		UtilityTotal
Reportable
Segments
All
   Other(4)
Corporate
and
Intersegment
  Eliminations(4)
Total
Consolidated
 (Thousands)
Revenue from External Customers(1)
$984,561 $212,558 $850,258 $2,047,377 $— $— $2,047,377 
Intersegment Revenues
— 112,347 294 112,641 — (112,641)— 
  Total Revenues984,561 324,905 850,552 2,160,018 — (112,641)2,047,377 
Operation and Maintenance Expense(2):
Upstream General and Administrative Expense55,365 — — 55,365 — (188)55,177 
Lease Operating Expense50,034 — — 50,034 — (1,855)48,179 
Gathering Operation and Maintenance Expense37,788 — — 37,788 — (207)37,581 
All Other Operation and Maintenance Expense9,847 89,913 190,778 290,538 — 25,437 315,975 
Purchased Gas Expense(2)
— — 433,384 433,384 — (110,049)323,335 
Depreciation, Depletion and Amortization Expense(2)
247,888 58,719 55,171 361,778 — 634 362,412 
Interest Expense(2)
44,753 35,314 33,508 113,575 376 (831)113,120 
Interest Income(986)(2,964)(3,116)(7,066)(10)(1,544)(8,620)
Income Tax Expense (Benefit)(2)
139,559 30,341 24,217 194,117 154 (6,026)188,245 
Other Expense (Income) Items(3)
12,362 22,017 11,485 45,864 (1,043)(782)44,039 
Segment Profit: Net Income (Loss)
$387,951 $91,565 $105,125 $584,641 $523 $(17,230)$567,934 
Expenditures for Additions to Long-Lived Assets
$453,903 $166,199 $120,550 $740,652 $— $3,888 $744,540 
Integrated
Upstream
and
Gathering		Pipeline
and
Storage		UtilityTotal
Reportable
Segments
All
   Other(4)
Corporate
and
Intersegment
  Eliminations(4)
Total
Consolidated
(Thousands)
Segment Assets:
At June 30, 2026$4,120,435 $2,690,056 $2,621,401 $9,431,892 $10,496 $1,009,379 $10,451,767 
At September 30, 2025$3,701,646 $2,412,747 $2,534,289 $8,648,682 $8,704 $61,718 $8,719,104 
Quarter Ended June 30, 2025
 Integrated
Upstream
and
Gathering		Pipeline
and
Storage		UtilityTotal
Reportable
Segments
All
   Other(4)
Corporate and
Intersegment
  Eliminations(4)
Total
Consolidated
 (Thousands)
Revenue from External Customers(1)
$306,402 $67,982 $157,446 $531,830 $— $— $531,830 
Intersegment Revenues
— 37,597 77 37,674 — (37,674)— 
  Total Revenues306,402 105,579 157,523 569,504 — (37,674)531,830 
Operation and Maintenance Expense(2):
Upstream General and Administrative Expense18,602 — — 18,602 — (59)18,543 
Lease Operating Expense12,566 — — 12,566 — (1,303)11,263 
Gathering Operation and Maintenance Expense7,865 — — 7,865 — (65)7,800 
All Other Operation and Maintenance Expense3,816 30,264 57,039 91,119 — 4,279 95,398 
Purchased Gas Expense(2)
— — 64,292 64,292 — (36,306)27,986 
Depreciation, Depletion and Amortization Expense(2)
79,696 18,601 17,945 116,242 — 166 116,408 
Interest Expense(2)
17,795 11,209 10,958 39,962 141 (2,214)37,889 
Interest Income(89)(1,116)(537)(1,742)(11)664 (1,089)
Income Tax Expense (Benefit)(2)
44,333 10,415 (2,201)52,547 (63)(1,405)51,079 
Other Expense (Income) Items(3)
5,151 7,349 5,030 17,530 142 (937)16,735 
Segment Profit: Net Income (Loss)
$116,667 $28,857 $4,997 $150,521 $(209)$(494)$149,818 
Expenditures for Additions to Long-Lived Assets
$150,007 $22,700 $50,025 $222,732 $— $138 $222,870 

Nine Months Ended June 30, 2025
 Integrated
Upstream
and
Gathering		Pipeline
and
Storage		UtilityTotal
Reportable
Segments
All
   Other(4)
Corporate and
Intersegment
  Eliminations(4)
Total
Consolidated
 (Thousands)
Revenue from External Customers(1)
$873,901 $207,916 $729,445 $1,811,262 $— $— $1,811,262 
Intersegment Revenues
— 113,849 279 114,128 — (114,128)— 
  Total Revenues873,901 321,765 729,724 1,925,390 — (114,128)1,811,262 
Operation and Maintenance Expense(2):
Upstream General and Administrative Expense56,776 — — 56,776 — (177)56,599 
Lease Operating Expense35,710 — — 35,710 — (4,513)31,197 
Gathering Operation and Maintenance Expense23,760 — — 23,760 — (194)23,566 
All Other Operation and Maintenance Expense10,994 87,940 177,742 276,676 — 10,562 287,238 
Purchased Gas Expense(2)
— — 337,541 337,541 — (108,880)228,661 
Depreciation, Depletion and Amortization Expense(2)
228,970 55,733 51,908 336,611 — 444 337,055 
Impairment of Assets (Significant Non-Cash Item)(2)
141,802 — — 141,802 — — 141,802 
Interest Expense(2)
60,029 34,637 32,601 127,267 389 (7,267)120,389 
Interest Income(1,297)(4,919)(1,631)(7,847)(11)2,833 (5,025)
Income Tax Expense (Benefit)(2)
82,761 32,553 21,498 136,812 (204)(2,979)133,629 
Other Expense (Income) Items(3)
13,191 22,802 9,025 45,018 500 (529)44,989 
Segment Profit: Net Income (Loss)
$221,205 $93,019 $101,040 $415,264 $(674)$(3,428)$411,162 
Expenditures for Additions to Long-Lived Assets
$412,519 $58,117 $128,322 $598,958 $— $(3,002)$595,956 
(1)All Revenue from External Customers originated in the United States.
(2)The Company considers this line to be a significant expense.
(3)Consists of Property, Franchise and Other Taxes, Non-Service Pension and Post-Retirement Benefits Costs (Credits), Other (Income) Deductions, and Purchased Gas Expense for the Pipeline and Storage Segment.
(4)Corporate and All Other categories primarily represent other non-segment business activities and eliminating entries.