v3.19.3.a.u2

Segment and Significant Customer Information (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  | $ 2,082 | $ 2,792 | $ 2,599 | $ 2,599 | $ 2,354 | $ 2,890 | $ 2,259 | $ 2,009 | $ 10,072 | [1] | $ 9,512 | [1] | $ 8,752 | [1]
Commodity Margin |  |  |  |  |  |  |  |  |  | 3,314 |  | 3,033 |  | 2,708 |
Mark-to-Market Commodity Activity, Net and Other Revenue | [2] |  |  |  |  |  |  |  |  | 254 |  | (270) |  | (294) |
Operating and maintenance expense |  |  |  |  |  |  |  |  |  | 1,001 |  | 1,020 |  | 1,080 |
Depreciation and amortization expense |  |  |  |  |  |  |  |  |  | 694 |  | 739 |  | 724 |
General and other administrative expense |  |  |  |  |  |  |  |  |  | 150 |  | 158 |  | 155 |
Other Cost and Expense, Operating |  |  |  |  |  |  |  |  |  | 79 |  | 98 |  | 85 |
Impairment losses |  |  |  |  |  |  |  |  |  | 84 |  | 10 |  | 41 |
(Gain) on sale of assets, net |  |  |  |  |  |  |  |  |  | (10) |  | 0 |  | (27) |
(Income) from unconsolidated subsidiaries |  |  |  |  |  |  |  |  |  | 22 |  | 24 |  | 22 |
Income from operations |  | $ 108 | $ 682 | $ 444 | $ 358 | $ 105 | $ 568 | $ 417 | $ (328) | 1,592 |  | 762 |  | 378 |
Interest expense, net of interest income |  |  |  |  |  |  |  |  |  | 609 |  | 617 |  | 621 |
Debt Extinguishment Costs and Other (Income) Expense, Net |  |  |  |  |  |  |  |  |  | 95 |  | 53 |  | 70 |
Income before income taxes |  |  |  |  |  |  |  |  |  | 888 |  | 92 |  | (313) |
Lease levelization |  |  |  |  |  |  |  |  |  | 1 |  | 0 |  | (8) |
Contract amortization |  |  |  |  |  |  |  |  |  | $ 72 |  | $ 100 |  | $ 175 |
Number of significant customers |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
West [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating revenues | [1] |  |  |  |  |  |  |  |  | $ 2,743 |  | $ 1,988 |  | $ 1,881 |
Commodity Margin |  |  |  |  |  |  |  |  |  | 1,151 |  | 1,060 |  | 970 |
Mark-to-Market Commodity Activity, Net and Other Revenue | [2] |  |  |  |  |  |  |  |  | 219 |  | (165) |  | (19) |
Operating and maintenance expense |  |  |  |  |  |  |  |  |  | 340 |  | 348 |  | 361 |
Depreciation and amortization expense |  |  |  |  |  |  |  |  |  | 254 |  | 269 |  | 240 |
General and other administrative expense |  |  |  |  |  |  |  |  |  | 35 |  | 40 |  | 45 |
Other Cost and Expense, Operating |  |  |  |  |  |  |  |  |  | 31 |  | 42 |  | 38 |
Impairment losses |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 28 |
(Gain) on sale of assets, net |  |  |  |  |  |  |  |  |  | (4) |  |  |  | 0 |
(Income) from unconsolidated subsidiaries |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Income from operations |  |  |  |  |  |  |  |  |  | 714 |  | 196 |  | 239 |
Texas [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating revenues | [1] |  |  |  |  |  |  |  |  | 3,081 |  | 2,860 |  | 2,342 |
Commodity Margin |  |  |  |  |  |  |  |  |  | 857 |  | 646 |  | 552 |
Mark-to-Market Commodity Activity, Net and Other Revenue | [2] |  |  |  |  |  |  |  |  | 154 |  | (197) |  | (174) |
Operating and maintenance expense |  |  |  |  |  |  |  |  |  | 269 |  | 272 |  | 308 |
Depreciation and amortization expense |  |  |  |  |  |  |  |  |  | 196 |  | 237 |  | 208 |
General and other administrative expense |  |  |  |  |  |  |  |  |  | 53 |  | 61 |  | 66 |
Other Cost and Expense, Operating |  |  |  |  |  |  |  |  |  | 6 |  | 24 |  | 14 |
Impairment losses |  |  |  |  |  |  |  |  |  | 13 |  | 0 |  | 13 |
(Gain) on sale of assets, net |  |  |  |  |  |  |  |  |  | 0 |  |  |  | 0 |
(Income) from unconsolidated subsidiaries |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Income from operations |  |  |  |  |  |  |  |  |  | 474 |  | (145) |  | (231) |
East [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating revenues | [1] |  |  |  |  |  |  |  |  | 2,164 |  | 1,987 |  | 1,658 |
Commodity Margin |  |  |  |  |  |  |  |  |  | 924 |  | 970 |  | 790 |
Mark-to-Market Commodity Activity, Net and Other Revenue | [2] |  |  |  |  |  |  |  |  | 46 |  | 40 |  | (62) |
Operating and maintenance expense |  |  |  |  |  |  |  |  |  | 278 |  | 269 |  | 302 |
Depreciation and amortization expense |  |  |  |  |  |  |  |  |  | 191 |  | 180 |  | 201 |
General and other administrative expense |  |  |  |  |  |  |  |  |  | 45 |  | 38 |  | 27 |
Other Cost and Expense, Operating |  |  |  |  |  |  |  |  |  | 42 |  | 32 |  | 33 |
Impairment losses |  |  |  |  |  |  |  |  |  | 71 |  | 10 |  | 0 |
(Gain) on sale of assets, net |  |  |  |  |  |  |  |  |  | (6) |  |  |  | (27) |
(Income) from unconsolidated subsidiaries |  |  |  |  |  |  |  |  |  | 24 |  | 26 |  | 24 |
Income from operations |  |  |  |  |  |  |  |  |  | 373 |  | 507 |  | 216 |
Consolidation, Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating revenues | [1] |  |  |  |  |  |  |  |  | (2,009) |  | (1,299) |  | (926) |
Commodity Margin |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Mark-to-Market Commodity Activity, Net and Other Revenue |  |  |  |  |  |  |  |  |  | (34) | [2] | (32) |  | (29) |
Operating and maintenance expense |  |  |  |  |  |  |  |  |  | (34) |  | (32) |  | (29) |
Depreciation and amortization expense |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
General and other administrative expense |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Other Cost and Expense, Operating |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Impairment losses |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
(Gain) on sale of assets, net |  |  |  |  |  |  |  |  |  | 0 |  |  |  | 0 |
(Income) from unconsolidated subsidiaries |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Income from operations |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Retail [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating revenues | [1] |  |  |  |  |  |  |  |  | 4,093 |  | 3,976 |  | 3,797 |
Commodity Margin |  |  |  |  |  |  |  |  |  | 382 |  | 357 |  | 396 |
Mark-to-Market Commodity Activity, Net and Other Revenue |  |  |  |  |  |  |  |  |  | (131) | [2] | 84 |  | (10) |
Operating and maintenance expense |  |  |  |  |  |  |  |  |  | 148 |  | 163 |  | 138 |
Depreciation and amortization expense |  |  |  |  |  |  |  |  |  | 53 |  | 53 |  | 75 |
General and other administrative expense |  |  |  |  |  |  |  |  |  | 17 |  | 19 |  | 17 |
Other Cost and Expense, Operating |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Impairment losses |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
(Gain) on sale of assets, net |  |  |  |  |  |  |  |  |  | 0 |  |  |  | 0 |
(Income) from unconsolidated subsidiaries |  |  |  |  |  |  |  |  |  | (2) |  | (2) |  | (2) |
Income from operations |  |  |  |  |  |  |  |  |  | 31 |  | 204 |  | 154 |
Intersegment Eliminations [Member] | West [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  |  |  |  |  |  |  |  |  | 530 |  | 488 |  | 324 |
Intersegment Eliminations [Member] | Texas [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  |  |  |  |  |  |  |  |  | 946 |  | 573 |  | 361 |
Intersegment Eliminations [Member] | East [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  |  |  |  |  |  |  |  |  | 522 |  | 234 |  | 237 |
Intersegment Eliminations [Member] | Retail [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  |  |  |  |  |  |  |  |  | 11 |  | 4 |  | 4 |
Other Assets [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contract amortization |  |  |  |  |  |  |  |  |  | $ 78 |  | $ 104 |  | $ 178 |
[1] | Includes intersegment revenues of $530 million, $488 million and $324 million in the West, $946 million, $573 million and $361 million in Texas, $522 million, $234 million and $237 million in the East and $11 million, $4 million, $4 million in Retail for the years ended December 31, 2019, 2018 and 2017, respectively.
[2] | Includes $1 million, nil and $(8) million of lease levelization and $78 million, $104 million and $178 million of amortization expense for the years ended December 31, 2019, 2018 and 2017, respectively.

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- Definition The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -SubTopic 10 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=68048583&loc=d3e3636-108311 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 + Details
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