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Organization and Basis of Presentation (Tables)
 12 Months Ended
Dec. 31, 2019
Accounting Policies [Abstract]  
Regulatory assets on the Balance Sheets
The following table provides information about the composition of net regulatory assets and liabilities as of December 31, 2019 and December 31, 2018, and the changes during the year ended December 31, 2019:
Net Regulatory Assets (Liabilities) by SourceDecember 31,
2019		December 31,
2018		Change
 (In millions)
Regulatory transition costs$(8)$49 $(57)
Customer payables for future income taxes(2,605)(2,725)120 
Nuclear decommissioning and spent fuel disposal costs(197)(148)(49)
Asset removal costs(756)(787)31 
Deferred transmission costs298 170 128 
Deferred generation costs214 202 12 
Deferred distribution costs155 208 (53)
Contract valuations51 72 (21)
Storm-related costs551 500 51 
Other36 52 (16)
Net Regulatory Liabilities included on the Consolidated Balance Sheets$(2,261)$(2,407)$146 
The following table provides information about the composition of net regulatory assets that do not earn a current return as of December 31, 2019 and 2018, of which approximately $228 million and $290 million, respectively, are currently being recovered through rates over varying periods depending on the nature of the deferral and the jurisdiction.
Regulatory Assets by Source Not Earning a Current ReturnDecember 31,
2019		December 31,
2018		Change
(in millions)
Regulatory transition costs$7 $10 $(3)
Deferred transmission costs27 80 (53)
Deferred generation costs15 8 7 
Storm-related costs471 363 108 
Other25 42 (17)
Regulatory Assets Not Earning a Current Return$545 $503 $42 
Receivables from customers Billed and unbilled customer receivables as of December 31, 2019 and 2018, net of allowance for uncollectible accounts, are included below. The allowance for uncollectible customer receivables is based on historical loss information comprised of a rolling 36-month average net write-off percentage of revenues.
Customer ReceivablesDecember 31, 2019December 31, 2018
 (In millions)
Billed$564 $686 
Unbilled527 535 
Total$1,091 $1,221 
Reconciliation of basic and diluted earnings per share
Year Ended December 31,
Reconciliation of Basic and Diluted EPS of Common Stock201920182017
(In millions, except per share amounts)
EPS of Common Stock
Income from continuing operations$904 $1,022 $(289)
Less: Preferred dividends (3)(71)— 
Less: Amortization of beneficial conversion feature— (296)— 
Less: Undistributed earnings allocated to preferred stockholders(1)
(1)— — 
Income (loss) from continuing operations available to common stockholders900 655 (289)
Discontinued operations, net of tax8 326 (1,435)
Less: Undistributed earnings allocated to preferred stockholders (1)
— — — 
Income (loss) from discontinued operations available to common stockholders8 326 (1,435)
Income (loss) attributable to common stockholders, basic$908 $981 $(1,724)
Income allocated to preferred stockholders, preferred dilutive (2)
4 N/AN/A
Income (loss) attributable to common stockholders, dilutive$912 $981 $(1,724)
Share Count information:
Weighted average number of basic shares outstanding535 492 444 
Assumed exercise of dilutive stock options and awards3 2 — 
Assumed conversion of preferred stock 4 — — 
Weighted average number of diluted shares outstanding542 494 444 
Income (loss) attributable to common stockholders, per common share:
Income from continuing operations, basic$1.69 $1.33 $(0.65)
Discontinued operations, basic 0.01 0.66 (3.23)
Income (loss) attributable to common stockholders, basic $1.70 $1.99 $(3.88)
Income from continuing operations, diluted$1.67 $1.33 $(0.65)
Discontinued operations, diluted0.01 0.66 (3.23)
Income (loss) attributable to common stockholders, diluted
$1.68 $1.99 $(3.88)
(1)Undistributed earnings were not allocated to participating securities for the year ended December 31, 2018, as income from continuing operations less dividends declared (common and preferred) and deemed dividends were a net loss. Undistributed earning allocated to participating securities for the year ended December 31, 2019 were immaterial.
(2)The shares of common stock issuable upon conversion of the preferred shares (26 million shares) were not included for 2018 as their inclusion would be anti-dilutive to basic EPS from continuing operations. Amounts allocated to preferred stockholders of $4 million for the year ended December 31,2019 are included within Income from continuing operations available to common stockholders for diluted earnings.
Property, plant and equipment balances Property, plant and equipment balances by segment as of December 31, 2019 and 2018, were as follows:
December 31, 2019
Property, Plant and Equipment
In Service(1)
Accum. Depr.Net PlantCWIPTotal
(In millions)
Regulated Distribution$28,735 $(8,540)$20,195 $744 $20,939 
Regulated Transmission12,023 (2,383)9,640 526 10,166 
Corporate/Other1,009 (504)505 40 545 
Total$41,767 $(11,427)$30,340 $1,310 $31,650 
December 31, 2018
Property, Plant and Equipment
In Service(1)
Accum. Depr.Net PlantCWIPTotal
(In millions)
Regulated Distribution$27,520 $(8,132)$19,388 $628 $20,016 
Regulated Transmission11,041 (2,210)8,831 545 9,376 
Corporate/Other908 (451)457 62 519 
Total$39,469 $(10,793)$28,676 $1,235 $29,911 
(1) Includes finance leases of $163 million and $173 million as of December 31, 2019 and 2018, respectively.
Summary of changes in goodwill The following table presents goodwill by reporting unit as of December 31, 2019:
Regulated DistributionRegulated TransmissionConsolidated
(In millions)
Goodwill$5,004 $614 $5,618