v3.20.2

Segment Information (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |
Total operating revenues | $ 1,744 | [1] | $ 2,599 | [1] | $ 4,036 | [2] | $ 5,198 | [2]
Commodity Margin | 723 |  | 752 |  | 1,311 |  | 1,531 |
Add: Mark-to-market commodity activity, net and other(2) | 59 | [3] | 200 | [3] | 272 | [4] | 252 | [4]
Operating and maintenance expense | 266 |  | 245 |  | 506 |  | 484 |
Depreciation and amortization expense | 163 |  | 175 |  | 327 |  | 349 |
General and other administrative expense | 31 |  | 34 |  | 62 |  | 66 |
Other operating expenses | 14 |  | 19 |  | 31 |  | 38 |
(Income) loss from unconsolidated investments in power plants | (4) |  | (5) |  | (4) |  | (11) |
Income from operations | 312 |  | 444 |  | 661 |  | 802 |
Interest expense | 167 |  | 157 |  | 336 |  | 306 |
Debt Extinguishment Costs and Other (Income) Expense, Net | 13 |  | 8 |  | 17 |  | 27 |
Income before income taxes | 132 |  | 279 |  | 308 |  | 469 |
Lease levelization | (22) |  | (19) |  | (40) |  | (35) |
Impairment losses | 0 |  | 40 |  | 0 |  | 55 |
West |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |
Total operating revenues | 470 | [1] | 649 | [1] | 1,175 | [2] | 1,331 | [2]
Commodity Margin | 269 |  | 251 |  | 503 |  | 515 |
Add: Mark-to-market commodity activity, net and other(2) | 67 | [3] | 58 | [3] | 121 | [4] | 114 | [4]
Operating and maintenance expense | 96 |  | 84 |  | 182 |  | 165 |
Depreciation and amortization expense | 56 |  | 60 |  | 112 |  | 133 |
General and other administrative expense | 6 |  | 5 |  | 14 |  | 12 |
Other operating expenses | 7 |  | 7 |  | 15 |  | 16 |
(Income) loss from unconsolidated investments in power plants | 0 |  | 0 |  | 0 |  | 0 |
Income from operations | 171 |  | 153 |  | 301 |  | 303 |
Impairment losses |  |  | 0 |  |  |  | 0 |
Texas |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |
Total operating revenues | 620 | [1] | 899 | [1] | 1,270 | [2] | 1,642 | [2]
Commodity Margin | 172 |  | 173 |  | 285 |  | 335 |
Add: Mark-to-market commodity activity, net and other(2) | (17) | [3] | 240 | [3] | 84 | [4] | 284 | [4]
Operating and maintenance expense | 73 |  | 66 |  | 139 |  | 131 |
Depreciation and amortization expense | 50 |  | 54 |  | 100 |  | 99 |
General and other administrative expense | 13 |  | 15 |  | 24 |  | 27 |
Other operating expenses | 1 |  | 1 |  | 3 |  | 3 |
(Income) loss from unconsolidated investments in power plants | 0 |  | 0 |  | 0 |  | 0 |
Income from operations | 18 |  | 277 |  | 103 |  | 359 |
Impairment losses |  |  | 0 |  |  |  | 0 |
East |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |
Total operating revenues | 244 | [1] | 646 | [1] | 786 | [2] | 1,335 | [2]
Commodity Margin | 193 |  | 235 |  | 343 |  | 500 |
Add: Mark-to-market commodity activity, net and other(2) | (38) | [3] | 94 | [3] | 44 | [4] | 107 | [4]
Operating and maintenance expense | 71 |  | 72 |  | 134 |  | 139 |
Depreciation and amortization expense | 45 |  | 48 |  | 91 |  | 91 |
General and other administrative expense | 8 |  | 10 |  | 16 |  | 19 |
Other operating expenses | 6 |  | 11 |  | 13 |  | 19 |
(Income) loss from unconsolidated investments in power plants | (4) |  | (6) |  | (4) |  | (12) |
Income from operations | 29 |  | 154 |  | 137 |  | 296 |
Impairment losses |  |  | 40 |  |  |  | 55 |
Retail |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |
Total operating revenues | 720 | [1] | 1,082 | [1] | 1,628 | [2] | 2,080 | [2]
Commodity Margin | 89 |  | 93 |  | 180 |  | 181 |
Add: Mark-to-market commodity activity, net and other(2) | 56 | [3] | (182) | [3] | 40 | [4] | (235) | [4]
Operating and maintenance expense | 35 |  | 33 |  | 68 |  | 67 |
Depreciation and amortization expense | 12 |  | 13 |  | 24 |  | 26 |
General and other administrative expense | 4 |  | 4 |  | 8 |  | 8 |
Other operating expenses | 0 |  | 0 |  | 0 |  | 0 |
(Income) loss from unconsolidated investments in power plants | 0 |  | 1 |  | 0 |  | 1 |
Income from operations | 94 |  | (140) |  | 120 |  | (156) |
Impairment losses |  |  | 0 |  |  |  | 0 |
Consolidation, Eliminations |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |
Total operating revenues | (310) | [1] | (677) | [1] | (823) | [2] | (1,190) | [2]
Commodity Margin | 0 |  | 0 |  | 0 |  | 0 |
Add: Mark-to-market commodity activity, net and other(2) | (9) | [3] | (10) | [3] | (17) | [4] | (18) | [4]
Operating and maintenance expense | (9) |  | (10) |  | (17) |  | (18) |
Depreciation and amortization expense | 0 |  | 0 |  | 0 |  | 0 |
General and other administrative expense | 0 |  | 0 |  | 0 |  | 0 |
Other operating expenses | 0 |  | 0 |  | 0 |  | 0 |
(Income) loss from unconsolidated investments in power plants | 0 |  | 0 |  | 0 |  | 0 |
Income from operations | 0 |  | 0 |  | 0 |  | 0 |
Impairment losses |  |  | 0 |  |  |  | 0 |
Elimination | West |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |
Total operating revenues | 70 |  | 100 |  | 189 |  | 262 |
Elimination | Texas |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |
Total operating revenues | 214 |  | 348 |  | 432 |  | 559 |
Elimination | East |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |
Total operating revenues | 24 |  | 228 |  | 199 |  | 365 |
Elimination | Retail |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |
Total operating revenues | 2 |  | 1 |  | 3 |  | 4 |
Other Assets |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |
Amortization of Intangible Assets | $ 9 |  | $ 18 |  | $ 25 |  | $ 39 |
[1] | Includes intersegment revenues of $70 million and $100 million in the West, $214 million and $348 million in Texas, $24 million and $228 million in the East and $2 million and $1 million in Retail for the three months ended June 30, 2020 and 2019, respectively.
[2] | Includes intersegment revenues of $189 million and $262 million in the West, $432 million and $559 million in Texas, $199 million and $365 million in the East and $3 million and $4 million in Retail for the six months ended June 30, 2020 and 2019, respectively.
[3] | Includes $(22) million and $(19) million of lease levelization and $9 million and $18 million of amortization expense for the three months ended June 30, 2020 and 2019, respectively.
[4] | Includes $(40) million and $(35) million of lease levelization and $25 million and $39 million of amortization expense for the six months ended June 30, 2020 and 2019, respectively.

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