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v3.22.2

Segment Information (Details) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Jun. 30, 2022 USD ($) state | Mar. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Jun. 30, 2021 USD ($) | Mar. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Jun. 30, 2022 USD ($) state | Jun. 30, 2021 USD ($) | Sep. 30, 2021 USD ($)
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Number of states with service areas | state | 8 |  |  |  |  |  | 8 |  |
Segment Reporting Information Profit Loss [Abstract] |  |  |  |  |  |  |  |  |
Operating revenues | $ 816,429 |  |  | $ 605,553 |  |  | $ 3,479,034 | $ 2,839,106 |
Purchased gas cost | 249,159 |  |  | 86,870 |  |  | 1,491,700 | 948,939 |
Operation and maintenance expense | 182,325 |  |  | 184,470 |  |  | 504,787 | 479,488 |
Depreciation and amortization expense | 134,231 |  |  | 119,348 |  |  | 395,461 | 353,269 |
Taxes, other than income | 96,127 |  |  | 81,475 |  |  | 271,506 | 243,376 |
Operating income | 154,587 |  |  | 133,390 |  |  | 815,580 | 814,034 |
Other non-operating income | 13,263 |  |  | 5,887 |  |  | 27,178 | 14,793 |
Interest charges | 26,190 |  |  | 20,962 |  |  | 74,969 | 69,068 |
Income before income taxes | 141,660 |  |  | 118,315 |  |  | 767,789 | 759,759 |
Income tax expense | 13,113 |  |  | 15,904 |  |  | 65,034 | 142,916 |
Net income | 128,547 | $ 324,999 | $ 249,209 | 102,411 | $ 296,754 | $ 217,678 | 702,755 | 616,843 |
Capital expenditures | 536,010 |  |  | 512,232 |  |  | 1,726,039 | 1,357,960 |
Segment Reporting Information, Balance Sheet [Abstract] |  |  |  |  |  |  |  |  |
Property, plant and equipment, net | 16,556,603 |  |  |  |  |  | 16,556,603 |  | $ 15,063,970
Total assets | 21,655,484 |  |  |  |  |  | 21,655,484 |  | 19,608,662
Distribution |  |  |  |  |  |  |  |  |
Segment Reporting Information Profit Loss [Abstract] |  |  |  |  |  |  |  |  |
Operating revenues | 772,497 |  |  | 557,931 |  |  | 3,353,800 | 2,715,644 |
Pipeline and Storage |  |  |  |  |  |  |  |  |
Segment Reporting Information Profit Loss [Abstract] |  |  |  |  |  |  |  |  |
Operating revenues | 43,932 |  |  | 47,622 |  |  | 125,234 | 123,462 |
Eliminations |  |  |  |  |  |  |  |  |
Segment Reporting Information Profit Loss [Abstract] |  |  |  |  |  |  |  |  |
Operating revenues | (140,294) |  |  | (116,184) |  |  | (387,322) | (355,836) |
Purchased gas cost | (140,053) |  |  | (115,871) |  |  | (386,437) | (354,890) |
Operation and maintenance expense | (241) |  |  | (313) |  |  | (885) | (946) |
Depreciation and amortization expense | 0 |  |  | 0 |  |  | 0 | 0 |
Taxes, other than income | 0 |  |  | 0 |  |  | 0 | 0 |
Operating income | 0 |  |  | 0 |  |  | 0 | 0 |
Other non-operating income | 0 |  |  | 0 |  |  | 0 | 0 |
Interest charges | 0 |  |  | 0 |  |  | 0 | 0 |
Income before income taxes | 0 |  |  | 0 |  |  | 0 | 0 |
Income tax expense | 0 |  |  | 0 |  |  | 0 | 0 |
Net income | 0 |  |  | 0 |  |  | 0 | 0 |
Capital expenditures | 0 |  |  | 0 |  |  | 0 | 0 |
Segment Reporting Information, Balance Sheet [Abstract] |  |  |  |  |  |  |  |  |
Property, plant and equipment, net | 0 |  |  |  |  |  | 0 |  | 0
Total assets | (3,732,926) |  |  |  |  |  | (3,732,926) |  | (3,315,448)
Eliminations | Distribution |  |  |  |  |  |  |  |  |
Segment Reporting Information Profit Loss [Abstract] |  |  |  |  |  |  |  |  |
Operating revenues | 814 |  |  | 819 |  |  | 2,479 | 2,430 |
Eliminations | Pipeline and Storage |  |  |  |  |  |  |  |  |
Segment Reporting Information Profit Loss [Abstract] |  |  |  |  |  |  |  |  |
Operating revenues | 139,480 |  |  | 115,365 |  |  | 384,843 | 353,406 |
Operating Segments | Distribution |  |  |  |  |  |  |  |  |
Segment Reporting Information Profit Loss [Abstract] |  |  |  |  |  |  |  |  |
Operating revenues | 773,311 |  |  | 558,750 |  |  | 3,356,279 | 2,718,074 |
Purchased gas cost | 390,559 |  |  | 202,050 |  |  | 1,881,212 | 1,304,269 |
Operation and maintenance expense | 133,654 |  |  | 130,454 |  |  | 378,479 | 363,246 |
Depreciation and amortization expense | 97,106 |  |  | 86,099 |  |  | 286,515 | 254,636 |
Taxes, other than income | 85,933 |  |  | 72,024 |  |  | 242,214 | 214,991 |
Operating income | 66,059 |  |  | 68,123 |  |  | 567,859 | 580,932 |
Other non-operating income | 6,708 |  |  | 1,060 |  |  | 9,173 | 1,135 |
Interest charges | 12,341 |  |  | 8,540 |  |  | 36,046 | 33,269 |
Income before income taxes | 60,426 |  |  | 60,643 |  |  | 540,986 | 548,798 |
Income tax expense | 3,025 |  |  | 7,354 |  |  | 35,163 | 109,481 |
Net income | 57,401 |  |  | 53,289 |  |  | 505,823 | 439,317 |
Capital expenditures | 417,244 |  |  | 398,416 |  |  | 1,217,094 | 1,000,616 |
Segment Reporting Information, Balance Sheet [Abstract] |  |  |  |  |  |  |  |  |
Property, plant and equipment, net | 12,314,182 |  |  |  |  |  | 12,314,182 |  | 11,232,649
Total assets | 20,891,285 |  |  |  |  |  | 20,891,285 |  | 18,847,266
Operating Segments | Pipeline and Storage |  |  |  |  |  |  |  |  |
Segment Reporting Information Profit Loss [Abstract] |  |  |  |  |  |  |  |  |
Operating revenues | 183,412 |  |  | 162,987 |  |  | 510,077 | 476,868 |
Purchased gas cost | (1,347) |  |  | 691 |  |  | (3,075) | (440) |
Operation and maintenance expense | 48,912 |  |  | 54,329 |  |  | 127,193 | 117,188 |
Depreciation and amortization expense | 37,125 |  |  | 33,249 |  |  | 108,946 | 98,633 |
Taxes, other than income | 10,194 |  |  | 9,451 |  |  | 29,292 | 28,385 |
Operating income | 88,528 |  |  | 65,267 |  |  | 247,721 | 233,102 |
Other non-operating income | 6,555 |  |  | 4,827 |  |  | 18,005 | 13,658 |
Interest charges | 13,849 |  |  | 12,422 |  |  | 38,923 | 35,799 |
Income before income taxes | 81,234 |  |  | 57,672 |  |  | 226,803 | 210,961 |
Income tax expense | 10,088 |  |  | 8,550 |  |  | 29,871 | 33,435 |
Net income | 71,146 |  |  | 49,122 |  |  | 196,932 | 177,526 |
Capital expenditures | 118,766 |  |  | $ 113,816 |  |  | 508,945 | $ 357,344 |
Segment Reporting Information, Balance Sheet [Abstract] |  |  |  |  |  |  |  |  |
Property, plant and equipment, net | 4,242,421 |  |  |  |  |  | 4,242,421 |  | 3,831,321
Total assets | $ 4,497,125 |  |  |  |  |  | $ 4,497,125 |  | $ 4,076,844

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