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Revenue Recognition (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
Disaggregation of Revenue [Line Items] |  |
Subtotal | $ 499 | $ 473
Alternative revenue programs, net of amortization | 3 | (2)
Other accrued (deferred) revenues, net | 7 | 17
Total retail revenues | 509 | 454
Wholesale revenues | 37 | 28
Other operating revenue | 27 | 11
Total Revenues | 573 | 493
Gain on Derivative Instruments, Pretax | 11 | 2
Residential [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Subtotal | 290 | 268
Commercial [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Subtotal | 154 | 151
Industrial [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Subtotal | 44 | 44
Direct Access customers [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Subtotal | 11 | 10
Revenue Subject to Refund [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Net tax benefits due to the change in tax rate under the TCJA | $ 6 | $ 15

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- Definition Amount of increase (decrease) in revenue recognized for cumulative catch-up adjustment from change in estimate of transaction price which (increases) decreases obligation to transfer good or service to customer for which consideration from customer has been received or is due. Includes, but is not limited to, change in assessment of whether estimate of variable consideration is constrained. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130551-203045 + Details
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