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Property, Plant And Equipment (Tables) | 12 Months Ended
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Dec. 31, 2018
Property, Plant and Equipment [Abstract] |
Schedule Of Property, Plant And Equipment | property, plant and equipment on the Consolidated Balance Sheets are classified as follows:
At December 31, (in millions) | 2018 |  | 2017
Property, Plant and Equipment |  |  |
Gas Distribution Utility(1) | $ | 13,776.0 |  |  | $ | 12,531.0 |
Electric Utility(1) | 8,374.2 |  |  | 7,403.8 |
Corporate | 155.8 |  |  | 141.3 |
Construction Work in Process | 474.8 |  |  | 950.5 |
Non-Utility and Other(2) | 38.7 |  |  | 623.3 |
Total Property, Plant and Equipment | $ | 22,819.5 |  |  | $ | 21,649.9 |
Accumulated Depreciation and Amortization |  |  |
Gas Distribution Utility(1) | $ | (3,373.8 | ) |  | $ | (3,227.8 | )
Electric Utility(1) | (3,809.5 | ) |  | (3,673.2 | )
Corporate | (74.6 | ) |  | (52.6 | )
Non-Utility and Other(2) | (19.1 | ) |  | (336.8 | )
Total Accumulated Depreciation and Amortization | $ | (7,277.0 | ) |  | $ | (7,290.4 | )
Net Property, Plant and Equipment | $ | 15,542.5 |  |  | $ | 14,359.5 |
(1)NIPSCO’s common utility plant and associated accumulated depreciation and amortization are allocated between Gas Distribution Utility and Electric Utility Property, Plant and Equipment. (2)Non-Utility and Other as of December 31, 2017 includes net book value of $247.8 million related to Bailly Generating Station (Units 7 and 8) which was reclassified from Electric Utility in the fourth quarter of 2016. In May 2018, Units 7 and 8 were retired from service and the remaining balance was reclassified to "Regulatory assets (noncurrent)" on the Consolidated Balance Sheets. See Note 18-E, "Other Matters," and Note 8, "Regulatory Matters," for additional information.
Schedule Of Depreciation Provisions For Utility Plant As A Percentage Of The Original Cost | The weighted average depreciation provisions for utility plant, as a percentage of the original cost, for the periods ended December 31, 2018, 2017 and 2016 were as follows:
| 2018 |  | 2017 |  | 2016
Electric Operations(1) | 2.9 | % |  | 3.4 | % |  | 3.3 | %
Gas Distribution Operations | 2.2 | % |  | 2.1 | % |  | 2.1 | %

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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(13)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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