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Segment Information (Table) | 9 Months Ended
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Jun. 30, 2017
Segment Reporting [Abstract] |
Schedule of Segment Reporting Information, by Segment | Income statements for the three and nine months ended June 30, 2017 and 2016 by segment are presented in the following tables:
| Three Months Ended June 30, 2017
| Distribution |  | Pipeline and Storage |  | Natural Gas Marketing |  | Eliminations |  | Consolidated
| (In thousands)
Operating revenues from external parties | $ | 493,738 |  |  | $ | 32,763 |  |  | $ | — |  |  | $ | — |  |  | $ | 526,501 |
Intersegment revenues | 322 |  |  | 84,520 |  |  | — |  |  | (84,842 | ) |  | — |
Total operating revenues | 494,060 |  |  | 117,283 |  |  | — |  |  | (84,842 | ) |  | 526,501 |
Purchased gas cost | 197,767 |  |  | 1,251 |  |  | — |  |  | (84,842 | ) |  | 114,176 |
Operation and maintenance expense | 99,631 |  |  | 29,059 |  |  | — |  |  | — |  |  | 128,690 |
Depreciation and amortization expense | 62,760 |  |  | 17,263 |  |  | — |  |  | — |  |  | 80,023 |
Taxes, other than income | 56,850 |  |  | 6,098 |  |  | — |  |  | — |  |  | 62,948 |
Operating income | 77,052 |  |  | 63,612 |  |  | — |  |  | — |  |  | 140,664 |
Miscellaneous expense | (62 | ) |  | (227 | ) |  | — |  |  | — |  |  | (289 | )
Interest charges | 18,394 |  |  | 10,104 |  |  | — |  |  | — |  |  | 28,498 |
Income before income taxes | 58,596 |  |  | 53,281 |  |  | — |  |  | — |  |  | 111,877 |
Income tax expense | 22,082 |  |  | 18,987 |  |  | — |  |  | — |  |  | 41,069 |
Net income | $ | 36,514 |  |  | $ | 34,294 |  |  | $ | — |  |  | $ | — |  |  | $ | 70,808 |
Capital expenditures | $ | 205,780 |  |  | $ | 46,983 |  |  | $ | — |  |  | $ | — |  |  | $ | 252,763 |
| Three Months Ended June 30, 2016
| Distribution |  | Pipeline and Storage |  | Natural Gas Marketing |  | Eliminations |  | Consolidated
| (In thousands)
Operating revenues from external parties | $ | 424,553 |  |  | $ | 31,659 |  |  | $ | — |  |  | $ | — |  |  | $ | 456,212 |
Intersegment revenues | 352 |  |  | 82,196 |  |  | — |  |  | (82,548 | ) |  | — |
Total operating revenues | 424,905 |  |  | 113,855 |  |  | — |  |  | (82,548 | ) |  | 456,212 |
Purchased gas cost | 147,569 |  |  | (438 | ) |  | — |  |  | (82,548 | ) |  | 64,583 |
Operation and maintenance expense | 101,819 |  |  | 29,569 |  |  | — |  |  | — |  |  | 131,388 |
Depreciation and amortization expense | 59,193 |  |  | 13,687 |  |  | — |  |  | — |  |  | 72,880 |
Taxes, other than income | 52,662 |  |  | 6,303 |  |  | — |  |  | — |  |  | 58,965 |
Operating income | 63,662 |  |  | 64,734 |  |  | — |  |  | — |  |  | 128,396 |
Miscellaneous income (expense) | 1,243 |  |  | (125 | ) |  | — |  |  | — |  |  | 1,118 |
Interest charges | 18,677 |  |  | 9,002 |  |  | — |  |  | — |  |  | 27,679 |
Income from continuing operations before income taxes | 46,228 |  |  | 55,607 |  |  | — |  |  | — |  |  | 101,835 |
Income tax expense | 15,867 |  |  | 19,825 |  |  | — |  |  | — |  |  | 35,692 |
Income from continuing operations | 30,361 |  |  | 35,782 |  |  | — |  |  | — |  |  | 66,143 |
Income from discontinued operations, net of tax | — |  |  | — |  |  | 5,050 |  |  | — |  |  | 5,050 |
Net income | $ | 30,361 |  |  | $ | 35,782 |  |  | $ | 5,050 |  |  | $ | — |  |  | $ | 71,193 |
Capital expenditures | $ | 187,470 |  |  | $ | 66,108 |  |  | $ | 106 |  |  | $ | — |  |  | $ | 253,684 |
| Nine Months Ended June 30, 2017
| Distribution |  | Pipeline and Storage |  | Natural Gas Marketing |  | Eliminations |  | Consolidated
| (In thousands)
Operating revenues from external parties | $ | 2,210,221 |  |  | $ | 84,634 |  |  | $ | — |  |  | $ | — |  |  | $ | 2,294,855 |
Intersegment revenues | 1,036 |  |  | 254,573 |  |  | — |  |  | (255,609 | ) |  | — |
Total operating revenues | 2,211,257 |  |  | 339,207 |  |  | — |  |  | (255,609 | ) |  | 2,294,855 |
Purchased gas cost | 1,106,209 |  |  | 2,331 |  |  | — |  |  | (255,565 | ) |  | 852,975 |
Operation and maintenance expense | 296,048 |  |  | 89,863 |  |  | — |  |  | (44 | ) |  | 385,867 |
Depreciation and amortization expense | 185,219 |  |  | 49,429 |  |  | — |  |  | — |  |  | 234,648 |
Taxes, other than income | 165,032 |  |  | 20,579 |  |  | — |  |  | — |  |  | 185,611 |
Operating income | 458,749 |  |  | 177,005 |  |  | — |  |  | — |  |  | 635,754 |
Miscellaneous income (expense) | 334 |  |  | (784 | ) |  | — |  |  | — |  |  | (450 | )
Interest charges | 56,437 |  |  | 30,035 |  |  | — |  |  | — |  |  | 86,472 |
Income from continuing operations before income taxes | 402,646 |  |  | 146,186 |  |  | — |  |  | — |  |  | 548,832 |
Income tax expense | 149,623 |  |  | 52,351 |  |  | — |  |  | — |  |  | 201,974 |
Income from continuing operations | 253,023 |  |  | 93,835 |  |  | — |  |  | — |  |  | 346,858 |
Income from discontinued operations, net of tax | — |  |  | — |  |  | 10,994 |  |  | — |  |  | 10,994 |
Gain on sale of discontinued operations, net of tax | — |  |  | — |  |  | 2,716 |  |  | — |  |  | 2,716 |
Net income | $ | 253,023 |  |  | $ | 93,835 |  |  | $ | 13,710 |  |  | $ | — |  |  | $ | 360,568 |
Capital expenditures | $ | 636,449 |  |  | $ | 175,699 |  |  | $ | — |  |  | $ | — |  |  | $ | 812,148 |
| Nine Months Ended June 30, 2016
| Distribution |  | Pipeline and Storage |  | Natural Gas Marketing |  | Eliminations |  | Consolidated
| (In thousands)
Operating revenues from external parties | $ | 1,935,421 |  |  | $ | 85,584 |  |  | $ | — |  |  | $ | — |  |  | $ | 2,021,005 |
Intersegment revenues | 1,054 |  |  | 228,840 |  |  | — |  |  | (229,894 | ) |  | — |
Total operating revenues | 1,936,475 |  |  | 314,424 |  |  | — |  |  | (229,894 | ) |  | 2,021,005 |
Purchased gas cost | 912,231 |  |  | (72 | ) |  | — |  |  | (229,894 | ) |  | 682,265 |
Operation and maintenance expense | 294,154 |  |  | 84,919 |  |  | — |  |  | — |  |  | 379,073 |
Depreciation and amortization expense | 174,748 |  |  | 40,179 |  |  | — |  |  | — |  |  | 214,927 |
Taxes, other than income | 153,198 |  |  | 18,761 |  |  | — |  |  | — |  |  | 171,959 |
Operating income | 402,144 |  |  | 170,637 |  |  | — |  |  | — |  |  | 572,781 |
Miscellaneous income (expense) | 804 |  |  | (894 | ) |  | — |  |  | — |  |  | (90 | )
Interest charges | 57,481 |  |  | 27,294 |  |  | — |  |  | — |  |  | 84,775 |
Income from continuing operations before income taxes | 345,467 |  |  | 142,449 |  |  | — |  |  | — |  |  | 487,916 |
Income tax expense | 126,090 |  |  | 51,134 |  |  | — |  |  | — |  |  | 177,224 |
Income from continuing operations | 219,377 |  |  | 91,315 |  |  | — |  |  | — |  |  | 310,692 |
Income from discontinued operations, net of tax | — |  |  | — |  |  | 5,172 |  |  | — |  |  | 5,172 |
Net income | $ | 219,377 |  |  | $ | 91,315 |  |  | $ | 5,172 |  |  | $ | — |  |  | $ | 315,864 |
Capital expenditures | $ | 528,063 |  |  | $ | 261,446 |  |  | $ | 179 |  |  | $ | — |  |  | $ | 789,688 |
Balance sheet information at June 30, 2017 and September 30, 2016 by segment is presented in the following tables:
| June 30, 2017
| Distribution |  | Pipeline and Storage |  | Natural Gas Marketing |  | Eliminations |  | Consolidated
| (In thousands)
ASSETS |  |  |  |  |  |  |  |  |
Property, plant and equipment, net | $ | 6,678,875 |  |  | $ | 2,245,506 |  |  | $ | — |  |  | $ | — |  |  | $ | 8,924,381 |
Investment in subsidiaries | 798,994 |  |  | 13,851 |  |  | — |  |  | (812,845 | ) |  | — |
Current assets |  |  |  |  |  |  |  |  |
Cash and cash equivalents | 69,777 |  |  | — |  |  | — |  |  | — |  |  | 69,777 |
Other current assets | 437,700 |  |  | 29,265 |  |  | — |  |  | (2,360 | ) |  | 464,605 |
Intercompany receivables | 983,866 |  |  | — |  |  | — |  |  | (983,866 | ) |  | — |
Total current assets | 1,491,343 |  |  | 29,265 |  |  | — |  |  | (986,226 | ) |  | 534,382 |
Goodwill | 586,661 |  |  | 143,012 |  |  | — |  |  | — |  |  | 729,673 |
Deferred charges and other assets | 280,240 |  |  | 30,099 |  |  | — |  |  | — |  |  | 310,339 |
| $ | 9,836,113 |  |  | $ | 2,461,733 |  |  | $ | — |  |  | $ | (1,799,071 | ) |  | $ | 10,498,775 |
CAPITALIZATION AND LIABILITIES |  |  |  |  |  |  |  |  |
Shareholders’ equity | $ | 3,901,710 |  |  | $ | 812,845 |  |  | $ | — |  |  | $ | (812,845 | ) |  | $ | 3,901,710 |
Long-term debt | 3,066,734 |  |  | — |  |  | — |  |  | — |  |  | 3,066,734 |
Total capitalization | 6,968,444 |  |  | 812,845 |  |  | — |  |  | (812,845 | ) |  | 6,968,444 |
Current liabilities |  |  |  |  |  |  |  |  |
Short-term debt | 258,573 |  |  | — |  |  | — |  |  | — |  |  | 258,573 |
Other current liabilities | 451,026 |  |  | 38,420 |  |  | — |  |  | (2,360 | ) |  | 487,086 |
Intercompany payables | — |  |  | 983,866 |  |  | — |  |  | (983,866 | ) |  | — |
Total current liabilities | 709,599 |  |  | 1,022,286 |  |  | — |  |  | (986,226 | ) |  | 745,659 |
Deferred income taxes | 1,251,528 |  |  | 602,036 |  |  | — |  |  | — |  |  | 1,853,564 |
Regulatory cost of removal obligation | 432,531 |  |  | 24,529 |  |  | — |  |  | — |  |  | 457,060 |
Pension and postretirement liabilities | 304,919 |  |  | — |  |  | — |  |  | — |  |  | 304,919 |
Deferred credits and other liabilities | 169,092 |  |  | 37 |  |  | — |  |  | — |  |  | 169,129 |
| $ | 9,836,113 |  |  | $ | 2,461,733 |  |  | $ | — |  |  | $ | (1,799,071 | ) |  | $ | 10,498,775 |
| September 30, 2016
| Distribution |  | Pipeline and Storage |  | Natural Gas Marketing |  | Eliminations |  | Consolidated
| (In thousands)
ASSETS |  |  |  |  |  |  |  |  |
Property, plant and equipment, net | $ | 6,208,465 |  |  | $ | 2,060,141 |  |  | $ | — |  |  | $ | — |  |  | $ | 8,268,606 |
Investment in subsidiaries | 768,415 |  |  | 13,854 |  |  | — |  |  | (782,269 | ) |  | — |
Current assets |  |  |  |  |  |  |  |  |
Cash and cash equivalents | 22,117 |  |  | — |  |  | 25,417 |  |  | — |  |  | 47,534 |
Current assets of disposal group classified as held for sale | — |  |  | — |  |  | 162,508 |  |  | (11,391 | ) |  | 151,117 |
Other current assets | 489,963 |  |  | 39,078 |  |  | 5 |  |  | (46,011 | ) |  | 483,035 |
Intercompany receivables | 971,665 |  |  | — |  |  | — |  |  | (971,665 | ) |  | — |
Total current assets | 1,483,745 |  |  | 39,078 |  |  | 187,930 |  |  | (1,029,067 | ) |  | 681,686 |
Goodwill | 583,950 |  |  | 143,012 |  |  | — |  |  | — |  |  | 726,962 |
Noncurrent assets of disposal group classified as held for sale | — |  |  | — |  |  | 28,785 |  |  | (169 | ) |  | 28,616 |
Deferred charges and other assets | 277,240 |  |  | 27,779 |  |  | — |  |  | — |  |  | 305,019 |
| $ | 9,321,815 |  |  | $ | 2,283,864 |  |  | $ | 216,715 |  |  | $ | (1,811,505 | ) |  | $ | 10,010,889 |
CAPITALIZATION AND LIABILITIES |  |  |  |  |  |  |  |  |
Shareholders’ equity | $ | 3,463,059 |  |  | $ | 715,672 |  |  | $ | 66,597 |  |  | $ | (782,269 | ) |  | $ | 3,463,059 |
Long-term debt | 2,188,779 |  |  | — |  |  | — |  |  | — |  |  | 2,188,779 |
Total capitalization | 5,651,838 |  |  | 715,672 |  |  | 66,597 |  |  | (782,269 | ) |  | 5,651,838 |
Current liabilities |  |  |  |  |  |  |  |  |
Current maturities of long-term debt | 250,000 |  |  | — |  |  | — |  |  | — |  |  | 250,000 |
Short-term debt | 829,811 |  |  | — |  |  | 35,000 |  |  | (35,000 | ) |  | 829,811 |
Current liabilities of the disposal group classified as held for sale | — |  |  | — |  |  | 81,908 |  |  | (9,008 | ) |  | 72,900 |
Other current liabilities | 605,790 |  |  | 39,911 |  |  | 3,263 |  |  | (13,394 | ) |  | 635,570 |
Intercompany payables | — |  |  | 957,526 |  |  | 14,139 |  |  | (971,665 | ) |  | — |
Total current liabilities | 1,685,601 |  |  | 997,437 |  |  | 134,310 |  |  | (1,029,067 | ) |  | 1,788,281 |
Deferred income taxes | 1,055,348 |  |  | 543,390 |  |  | 4,318 |  |  | — |  |  | 1,603,056 |
Regulatory cost of removal obligation | 397,162 |  |  | 27,119 |  |  | — |  |  | — |  |  | 424,281 |
Pension and postretirement liabilities | 297,743 |  |  | — |  |  | — |  |  | — |  |  | 297,743 |
Noncurrent liabilities of disposal group classified as held for sale | — |  |  | — |  |  | 316 |  |  | — |  |  | 316 |
Deferred credits and other liabilities | 234,123 |  |  | 246 |  |  | 11,174 |  |  | (169 | ) |  | 245,374 |
| $ | 9,321,815 |  |  | $ | 2,283,864 |  |  | $ | 216,715 |  |  | $ | (1,811,505 | ) |  | $ | 10,010,889 |

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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8906-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8813-108599 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8721-108599 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8736-108599 + Details
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