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Property, Plant And Equipment (Tables) | 12 Months Ended
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Dec. 31, 2021
Property, Plant and Equipment [Abstract] |
Schedule Of Property, Plant And Equipment | Our property, plant and equipment on the Consolidated Balance Sheets are classified as follows:
At December 31, (in millions) | 2021 |  | 2020
Property, Plant and Equipment |  |  |
Gas Distribution Utility(1) | $ | 15,240.6 |  |  | $ | 14,010.2 |
Electric Utility(1) | 6,754.9 |  |  | 6,478.0 |
Corporate | 217.8 |  |  | 197.3 |
Construction Work in Process | 808.0 |  |  | 572.6 |
Renewable Generation Assets(2) | 702.4 |  |  | 175.7 |
Non-Utility and Other(3) | 1,447.6 |  |  | 2,746.1 |
Total Property, Plant and Equipment | $ | 25,171.3 |  |  | $ | 24,179.9 |
Accumulated Depreciation and Amortization |  |  |
Gas Distribution Utility(1) | $ | (3,490.2) |  |  | $ | (3,292.9) |
Electric Utility(1) | (2,433.1) |  |  | (2,305.0) |
Corporate | (132.2) |  |  | (109.3) |
Renewable Generation Assets(2) | (6.5) |  |  | (0.1) |
Non-Utility and Other(3) | (1,227.5) |  |  | (1,853.1) |
Total Accumulated Depreciation and Amortization | $ | (7,289.5) |  |  | $ | (7,560.4) |
Net Property, Plant and Equipment | $ | 17,881.8 |  |  | $ | 16,619.5 |
(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)Our renewable generation assets are part of our electric segment and represent Non-Utility Property, owned and operated by joint ventures between NIPSCO and unrelated tax equity partners, and depreciated straight-line over 30 years. Refer to Note 4, "Variable Interest Entities," for additional information. (3)Non-Utility and Other as of December 31, 2020 includes net book value of four coal units totaling $903.8 million related to R.M. Schahfer Generating Station. Two of the four units were subsequently retired in 2021 and reclassified to current and long-term Regulatory Assets. Depreciation expense for the remaining net book value continues to be recorded at the composite depreciation rate approved by the IURC. As of December 31, 2021, Non-Utility and Other includes a net book value of $201.5 million related to the units not yet retired.
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, 2021, 2020 and 2019 were as follows:
| 2021 |  | 2020 |  | 2019
Electric Operations(1) | 3.4 | % |  | 3.4 | % |  | 2.8 | %
Gas Distribution Operations | 2.2 | % |  | 2.3 | % |  | 2.5 | %
(1)Increased rate beginning in 2020 primarily attributable to higher depreciation rates from the recent rate case proceeding.

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