Reportable Segments The Registrants determination of reportable segments considers the strategic operating units under which the Registrants CODM manages sales, allocates resources and assesses performance of various products and services to wholesale or retail customers in differing regulatory environments. As of January 1, 2020, the Registrants CODM views net income as the measure of profit or loss for the reportable segments rather than the previous measure of operating income. Certain prior year amounts have been reclassified to conform to the current year presentation. As of March 31, 2020 , reportable segments by Registrant were as follows: Registrants Houston Electric T&amp;D Indiana Electric Integrated Natural Gas Distribution Midstream Investments CenterPoint Energy X X X X Houston Electric X CERC X  CenterPoint Energys and Houston Electrics Houston Electric T&amp;D reportable segment consists of electric transmission and distribution services in the Texas Gulf Coast area.  CenterPoint Energys Indiana Electric Integrated reportable segment consists of electric transmission and distribution services primarily to southwestern Indiana and includes power generation and wholesale power operations.  CenterPoint Energys Natural Gas Distribution reportable segment consists of (i) intrastate natural gas sales to, and natural gas transportation and distribution for residential, commercial, industrial and institutional customers in Arkansas, Indiana, Louisiana, Minnesota, Mississippi, Ohio, Oklahoma and Texas; (ii) permanent pipeline connections through interconnects with various interstate and intrastate pipeline companies through CEIP, formerly included in the Energy Services reportable segment; and (iii) temporary delivery of LNG and CNG throughout the contiguous 48 states through MES, formerly included in the Energy Services reportable segment.  CERCs Natural Gas Distribution reportable segment consists of (i) intrastate natural gas sales to, and natural gas transportation and distribution for residential, commercial, industrial and institutional customers in Arkansas, Louisiana, Minnesota, Mississippi, Oklahoma and Texas; (ii) permanent pipeline connections through interconnects with various interstate and intrastate pipeline companies through CEIP, formerly included in the Energy Services reportable segment; and (iii) temporary delivery of LNG and CNG throughout the contiguous 48 states through MES, formerly included in the Energy Services reportable segment.  CenterPoint Energys Midstream Investments reportable segment consists of the equity investment in Enable (excluding the Enable Series A Preferred Units).  CenterPoint Energys Corporate and Other consists of energy performance contracting and sustainable infrastructure services through ESG and other corporate operations which support all of the business operations of CenterPoint Energy.  CERCs Corporate and Other consists primarily of corporate operations which support all of the business operations of CERC. Discontinued Operations On February 3, 2020, CenterPoint Energy, through its subsidiary VUSI, entered into the Securities Purchase Agreement to sell the Infrastructure Services Disposal Group, which consists of underground pipeline construction and repair services. Accordingly, the previously reported Infrastructure Services reportable segment has been eliminated. The transaction closed on April 9, 2020. See Note 3 for further information. Additionally, on February 24, 2020, CenterPoint Energy, through its subsidiary CERC Corp., entered into the Equity Purchase Agreement to sell the Energy Services Disposal Group, which consists of non-rate regulated natural gas sales and service operations. Accordingly, the previously reported Energy Services reportable segment has been eliminated. The transaction is expected to close in the second quarter of 2020. See Note 3 for further information. Financial data for reportable segments is as follows: CenterPoint Energy Three Months Ended March 31, 2020 Revenues from External Customers Equity in Earnings of Unconsolidated Affiliates Depreciation and Amortization Interest Income Interest Expense Income Tax Expense (Benefit) Net Income (Loss) (in millions) Houston Electric T&amp;D $ 638 (3) $  $ 129 $ 1 (1) $ (41 ) (2) $ 5 $ 37 Indiana Electric Integrated 129  25  (6 ) 3 (171 ) Natural Gas Distribution 1,318  111 1 (32 ) 56 204 Midstream Investments  (1,475 )   (14 ) (361 ) (1,127 ) Corporate and Other 82  17 48 (96 ) (50 ) 4 Eliminations    (50 ) 50   Continuing Operations $ 2,167 $ (1,475 ) $ 282 $  $ (139 ) $ (347 ) (1,053 ) Discontinued Operations, net (146 ) Consolidated $ (1,199 ) Three Months Ended March 31, 2019 Revenues from External Customers Equity in Earnings of Unconsolidated Affiliates Depreciation and Amortization Interest Income Interest Expense Income Tax Expense (Benefit) Net Income (Loss) (in millions) Houston Electric T&amp;D $ 689 (3) $  $ 175 $ 4 (1) $ (40 ) (2) $ 6 $ 30 Indiana Electric Integrated 83  16  (3 ) (2 ) (9 ) Natural Gas Distribution 1,415  95 1 (23 ) 26 120 Midstream Investments  62  2 (12 ) 28 24 Corporate and Other 42  14 46 (84 ) (44 ) (22 ) Eliminations    (41 ) 41   Consolidated $ 2,229 $ 62 $ 300 $ 12 $ (121 ) $ 14 143 Discontinued Operations, net 26 Consolidated $ 169 (1) Excludes interest income from Securitization Bonds of $1 million and $2 million for the three months ended March 31, 2020 and 2019, respectively. (2) Excludes interest expense on Securitization Bonds of $8 million and $12 million for the three months ended March 31, 2020 and 2019, respectively. (3) CenterPoint Energys Houston Electric T&amp;Ds revenues from major external customers are as follows: Three Months Ended March 31, 2020 2019 (in millions) Affiliates of NRG $ 156 $ 151 Affiliates of Vistra Energy Corp. 81 54 Houston Electric Houston Electric consists of a single reportable segment; therefore, a tabular reportable segment presentation has not been included. Houston Electrics T&amp;D revenues from major external customers are as follows: Three Months Ended March 31, 2020 2019 (in millions) Affiliates of NRG $ 156 $ 151 Affiliates of Vistra Energy Corp. 81 54 CERC Three Months Ended March 31, 2020 Revenues from External Customers Depreciation and Amortization Interest Income Interest Expense Income Tax Expense (Benefit) Net Income (Loss) (in millions) Natural Gas Distribution $ 1,008 $ 74 $ 1 $ (21 ) $ 44 $ 134 Corporate and Other 3  21 (31 ) (9 ) (3 ) Eliminations   (22 ) 22   Continuing Operations $ 1,011 $ 74 $  $ (30 ) $ 35 131 Discontinued Operations, net (64 ) Consolidated $ 67 Three Months Ended March 31, 2019 Revenues from External Customers Depreciation and Amortization Interest Income Interest Expense Income Tax Expense (Benefit) Net Income (Loss) (in millions) Natural Gas Distribution $ 1,211 $ 73 $ 1 $ (19 ) $ 26 $ 119 Corporate and Other 1  20 (31 ) (8 ) (9 ) Eliminations   (21 ) 21   Continuing Operations $ 1,212 $ 73 $  $ (29 ) $ 18 110 Discontinued Operations, net 28 Consolidated $ 138 CenterPoint Energy and CERC Total Assets March 31, 2020 December 31, 2019 CenterPoint Energy CERC CenterPoint Energy CERC (in millions) Houston Electric T&amp;D $ 10,870 $  $ 11,264 $  Indiana Electric Integrated 3,015  3,168  Natural Gas Distribution 13,979 7,562 14,105 7,698 Midstream Investments 915  2,473  Corporate and Other, net of eliminations 2,969 (87 ) 2,555 (90 ) Continuing Operations 31,748 7,475 33,565 7,608 Assets Held for Sale 1,647 675 1,964 904 Consolidated $ 33,395 $ 8,150 $ 35,529 $ 8,512