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Revenue and Accounts Receivable
 6 Months Ended
Mar. 31, 2026
Revenue from Contract with Customer [Abstract]  
Revenue and Accounts Receivable Revenue and Accounts Receivable
Revenue
Our revenue recognition policy is fully described in Note 2 to the consolidated financial statements in our Annual Report on Form 10-K for the fiscal year ended September 30, 2025. The following tables disaggregate our revenue from contracts with customers by customer type and segment and provide a reconciliation to total operating revenues, including intersegment revenues, for the three and six months ended March 31, 2026 and 2025.
Three Months Ended March 31, 2026Three Months Ended March 31, 2025
DistributionPipeline and StorageDistributionPipeline and Storage
(In thousands)
Gas sales revenues:
Residential$1,219,792 $— $1,308,691 $— 
Commercial469,001 — 480,108 — 
Industrial44,479 — 38,885 — 
Public authority and other15,458 — 23,921 — 
Total gas sales revenues1,748,730 — 1,851,605 — 
Transportation revenues44,363 318,780 43,352 266,514 
Miscellaneous revenues3,461 3,351 4,222 4,259 
Revenues from contracts with customers1,796,554 322,131 1,899,179 270,773 
Alternative revenue program revenues77,179 (32,842)(20,117)(11,774)
Other revenues3,947 — 3,466 — 
Total operating revenues$1,877,680 $289,289 $1,882,528 $258,999 
Six Months Ended March 31, 2026Six Months Ended March 31, 2025
DistributionPipeline and StorageDistributionPipeline and Storage
(In thousands)
Gas sales revenues:
Residential$2,000,204 $— $2,001,741 $— 
Commercial784,566 — 746,162 — 
Industrial77,340 — 65,206 — 
Public authority and other25,535 — 36,802 — 
Total gas sales revenues2,887,645 — 2,849,911 — 
Transportation revenues85,841 636,183 80,079 532,543 
Miscellaneous revenues6,299 5,981 7,244 6,923 
Revenues from contracts with customers2,979,785 642,164 2,937,234 539,466 
Alternative revenue program revenues149,011 (66,242)47,219 (25,077)
Other revenues7,710 — 7,410 — 
Total operating revenues$3,136,506 $575,922 $2,991,863 $514,389 
We have alternative revenue programs in each of our segments. In our distribution segment, we have weather-normalization adjustment mechanisms that serve to mitigate the effects of weather on our revenue. In our pipeline and storage segment, APT has a regulatory mechanism that requires that we share with its tariffed customers 75% of the difference between the total non-tariffed revenues earned during a test period and a revenue benchmark established by the RRC. Other revenues includes AEK revenues (see Note 9 to the condensed consolidated financial statements) and other miscellaneous revenues.
Accounts receivable and allowance for uncollectible accounts
Accounts receivable arise from natural gas sales to residential, commercial, industrial, public authority, and other customers. Our accounts receivable balance includes unbilled amounts which represent a customer’s consumption of gas from the date of the last cycle billing through the last day of the month. Our policy related to the accounting for our accounts receivable and allowance for uncollectible accounts is fully described in Note 2 to the consolidated financial statements in our Annual Report on Form 10-K for the fiscal year ended September 30, 2025. During the six months ended March 31, 2026, there were no material changes to this policy. Rollforwards of our allowance for uncollectible accounts for the three and six months ended March 31, 2026 and 2025 are presented in the table below. The allowance excludes the gas cost portion of customers’ bills for approximately 89 percent of our customers as we have the ability to collect these gas costs through our gas cost recovery mechanisms in most of our jurisdictions.
 Three Months Ended March 31, 2026
 (In thousands)
Beginning balance, December 31, 2025$45,100 
Current period provisions14,060 
Write-offs charged against allowance(4,275)
Recoveries of amounts previously written off459 
Ending balance, March 31, 2026
$55,344 
 Three Months Ended March 31, 2025
 (In thousands)
Beginning balance, December 31, 2024$39,166 
Current period provisions14,391 
Write-offs charged against allowance(4,761)
Recoveries of amounts previously written off545 
Ending balance, March 31, 2025
$49,341 
 Six Months Ended March 31, 2026
 (In thousands)
Beginning balance, September 30, 2025
$45,259 
Current period provisions21,485 
Write-offs charged against allowance(12,866)
Recoveries of amounts previously written off1,466 
Ending balance, March 31, 2026
$55,344 
 Six Months Ended March 31, 2025
 (In thousands)
Beginning balance, September 30, 2024
$37,056 
Current period provisions23,015 
Write-offs charged against allowance(12,209)
Recoveries of amounts previously written off1,479 
Ending balance, March 31, 2025
$49,341