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Discontinued Operations (Tables) | 9 Months Ended
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Sep. 30, 2016
Discontinued Operations and Disposal Groups [Abstract] |
Schedule of Discontinued Operations | These results are primarily from NiSource's former Columbia Pipeline Group Operations segment.
| Three Months Ended |  | Nine Months Ended
| September 30, 2015 |  | September 30, 2015
(in millions) | Columbia Pipeline Group Operations |  | Corporate and Other |  | Total |  | Columbia Pipeline Group Operations |  | Corporate and Other |  | Total
Net Revenues |  |  |  |  |  |  |  |  |  |  |
Transportation and storage revenues | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 561.4 |  |  | $ | — |  |  | $ | 561.4 |
Other revenues | — |  |  | — |  |  | — |  |  | 94.3 |  |  | — |  |  | 94.3 |
Total Sales Revenues | — |  |  | — |  |  | — |  |  | 655.7 |  |  | — |  |  | 655.7 |
Less: Cost of sales (excluding depreciation and amortization) | — |  |  | — |  |  | — |  |  | 0.2 |  |  | — |  |  | 0.2 |
Net Revenues | — |  |  | — |  |  | — |  |  | 655.5 |  |  | — |  |  | 655.5 |
Operating Expenses |  |  |  |  |  |  |  |  |  |  |
Operation and maintenance | 5.5 |  | (1) | — |  |  | 5.5 |  |  | 374.8 |  | (1) | — |  |  | 374.8 |
Depreciation and amortization | — |  |  | — |  |  | — |  |  | 66.4 |  |  | — |  |  | 66.4 |
Gain on sale of assets | — |  |  | — |  |  | — |  |  | (13.6 | ) |  | — |  |  | (13.6 | )
Other taxes | — |  |  | — |  |  | — |  |  | 38.0 |  |  | — |  |  | 38.0 |
Total Operating Expenses | 5.5 |  |  | — |  |  | 5.5 |  |  | 465.6 |  |  | — |  |  | 465.6 |
Equity Earnings in Unconsolidated Affiliates | — |  |  | — |  |  | — |  |  | 29.1 |  |  | — |  |  | 29.1 |
Operating Income (Loss) from Discontinued Operations | (5.5 | ) |  | — |  |  | (5.5 | ) |  | 219.0 |  |  | — |  |  | 219.0 |
Other Income (Deductions) |  |  |  |  |  |  |  |  |  |  |
Interest expense, net | — |  |  | — |  |  | — |  |  | (37.1 | ) |  | — |  |  | (37.1 | )
Other, net | — |  |  | — |  |  | — |  |  | 7.8 |  |  | (0.6 | ) |  | 7.2 |
Total Other Deductions | — |  |  | — |  |  | — |  |  | (29.3 | ) |  | (0.6 | ) |  | (29.9 | )
Income (Loss) from Discontinued Operations before Income Taxes | (5.5 | ) |  | — |  |  | (5.5 | ) |  | 189.7 |  |  | (0.6 | ) |  | 189.1 |
Income Taxes | 14.2 |  | (2) | — |  |  | 14.2 |  |  | 80.9 |  |  | (0.3 | ) |  | 80.6 |
Income (Loss) from Discontinued Operations - net of taxes | $ | (19.7 | ) |  | $ | — |  |  | $ | (19.7 | ) |  | $ | 108.8 |  |  | $ | (0.3 | ) |  | $ | 108.5 |
(1) Includes approximately $5.5 million and $54.4 million of transaction costs related to the Separation for the three and nine months ended September 30, 2015, respectively. (2)

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- Definition Tabular disclosure of information related to a disposal group. Includes, but is not limited to, a discontinued operation, disposal classified as held-for-sale or disposed of by means other than sale or disposal of an individually significant component. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=65878427&loc=SL51721533-107759 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 4B -URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721665-107760 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64827811&loc=d3e1474-107760 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=64827811&loc=d3e1361-107760 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721683-107760 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 3A -URI http://asc.fasb.org/extlink&oid=64862545&loc=SL51724579-110230 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5C -URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721675-107760 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 4A -URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721663-107760 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64862545&loc=d3e2941-110230 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5B -URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721673-107760 Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 3A -URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721659-107760 Reference 12: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5A -URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721671-107760 Reference 13: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5D -URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721677-107760 + Details
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