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v3.25.1

Revenue and Accounts Receivable - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Mar. 31, 2025 | Mar. 31, 2024
Disaggregation of Revenue [Line Items] |  |  |  |
Total operating revenues | $ 1,950,502 | $ 1,647,227 | $ 3,126,501 | $ 2,805,694
Distribution |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total operating revenues | 1,881,742 | 1,588,394 | 2,990,311 | 2,693,013
Pipeline and Storage |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total operating revenues | 68,760 | 58,833 | 136,190 | 112,681
Operating Segments | Distribution |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 1,899,179 | 1,562,867 | 2,937,234 | 2,647,027
Alternative revenue program revenues | (20,117) | 22,315 | 47,219 | 39,716
Other revenues | 3,466 | 3,999 | 7,410 | 7,776
Total operating revenues | 1,882,528 | 1,589,181 | 2,991,863 | 2,694,519
Operating Segments | Pipeline and Storage |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 270,773 | 225,321 | 539,466 | 443,668
Alternative revenue program revenues | (11,774) | (1,834) | (25,077) | (9,012)
Other revenues | 0 | 0 | 0 | 0
Total operating revenues | 258,999 | 223,487 | 514,389 | 434,656
Operating Segments | Gas sales revenues | Distribution |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 1,851,605 | 1,521,536 | 2,849,911 | 2,569,286
Operating Segments | Gas sales revenues | Pipeline and Storage |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 0 | 0 | 0 | 0
Operating Segments | Transportation revenues | Distribution |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 43,352 | 37,607 | 80,079 | 71,374
Operating Segments | Transportation revenues | Pipeline and Storage |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 266,514 | 223,159 | 532,543 | 438,464
Operating Segments | Miscellaneous revenues | Distribution |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 4,222 | 3,724 | 7,244 | 6,367
Operating Segments | Miscellaneous revenues | Pipeline and Storage |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 4,259 | 2,162 | 6,923 | 5,204
Operating Segments | Residential | Gas sales revenues | Distribution |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 1,308,691 | 1,065,296 | 2,001,741 | 1,792,978
Operating Segments | Residential | Gas sales revenues | Pipeline and Storage |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 0 | 0 | 0 | 0
Operating Segments | Commercial | Gas sales revenues | Distribution |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 480,108 | 404,701 | 746,162 | 681,954
Operating Segments | Commercial | Gas sales revenues | Pipeline and Storage |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 0 | 0 | 0 | 0
Operating Segments | Industrial | Gas sales revenues | Distribution |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 38,885 | 30,419 | 65,206 | 58,650
Operating Segments | Industrial | Gas sales revenues | Pipeline and Storage |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 0 | 0 | 0 | 0
Operating Segments | Public authority and other | Gas sales revenues | Distribution |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 23,921 | 21,120 | 36,802 | 35,704
Operating Segments | Public authority and other | Gas sales revenues | Pipeline and Storage |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | $ 0 | $ 0 | $ 0 | $ 0

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