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SEGMENT INFORMATION (Tables)
3 Months Ended
Mar. 31, 2021
Segment Reporting [Abstract]  
Summary of Segment Information and Segmented Total Assets
Eversource's segment information is as follows:
For the Three Months Ended March 31, 2021
Eversource
(Millions of Dollars)
Electric DistributionNatural Gas DistributionElectric TransmissionWater DistributionOtherEliminationsTotal
Operating Revenues$1,900.3 $780.5 $400.6 $46.4 $343.0 $(645.0)$2,825.8 
Depreciation and Amortization(221.9)(45.7)(73.5)(11.3)(27.3)1.0 (378.7)
Other Operating Expenses(1,530.5)(535.8)(115.4)(25.1)(299.5)644.8 (1,861.5)
Operating Income$147.9 $199.0 $211.7 $10.0 $16.2 $0.8 $585.6 
Interest Expense$(53.3)$(13.9)$(32.7)$(7.9)$(41.6)$11.6 $(137.8)
Other Income, Net20.7 3.9 5.5 1.0 424.1 (421.0)34.2 
Net Income Attributable to Common Shareholders93.2 147.6 135.4 3.6 394.9 (408.6)366.1 
Cash Flows Used for Investments in Plant256.6 131.8 225.2 27.6 47.8 — 689.0 
For the Three Months Ended March 31, 2020
Eversource
(Millions of Dollars)
Electric
Distribution
Natural Gas
Distribution (1)
Electric
Transmission
Water Distribution
Other (1)
Eliminations (1)
Total
Operating Revenues$1,805.3 $448.6 $369.7 $46.9 $294.6 $(591.4)$2,373.7 
Depreciation and Amortization(167.3)(19.1)(67.5)(11.4)(21.3)0.6 (286.0)
Other Operating Expenses(1,439.6)(311.6)(106.8)(25.0)(257.0)591.4 (1,548.6)
Operating Income$198.4 $117.9 $195.4 $10.5 $16.3 $0.6 $539.1 
Interest Expense$(53.1)$(11.4)$(30.6)$(8.7)$(42.7)$11.8 $(134.7)
Other Income, Net12.5 1.4 5.2 0.1 383.7 (378.8)24.1 
Net Income Attributable to Common Shareholders130.1 85.9 126.8 2.1 356.3 (366.4)334.8 
Cash Flows Used for Investments in Plant315.8 99.1 232.8 18.5 59.3 — 725.5 

(1) On October 9, 2020, Eversource completed the CMA asset acquisition, with Yankee Energy System, Inc. (Yankee parent) as the acquiring entity. Yankee parent is the parent company of Yankee Gas, NSTAR Gas, EGMA and Hopkinton LNG Corp. As a result of the acquisition, in the fourth quarter of 2020, our chief operating decision maker assessed the performance of the Natural Gas Distribution segment including Yankee parent. Previously, Yankee parent was presented within Other and its equity in earnings were eliminated in consolidation. Prior comparative periods were revised to conform to the current period segment presentation.

The following table summarizes Eversource's segmented total assets:
Eversource
(Millions of Dollars)
Electric
Distribution
Natural Gas
Distribution
Electric
Transmission
Water DistributionOtherEliminationsTotal
As of March 31, 2021$25,033.9 $6,576.5 $11,713.1 $2,391.0 $21,468.2 $(20,664.5)$46,518.2 
As of December 31, 202024,981.9 6,450.5 11,695.0 2,375.2 22,089.4 (21,492.4)46,099.6