$EXC
EXELON CORP Stock $exc

$exc Overview Financials Valuation SEC Filings Company Website

2018 Q4 Form 10-K Financial Statement

#000162828019001107 Filed on February 08, 2019

Income Statement

Concept	2018 Q4	2018	2017 Q4
Revenue	$8.812B	$35.98B	$8.384B
YoY Change	5.1%	7.21%	6.46%
Cost Of Revenue	$4.027B	$15.54B	$3.212B
YoY Change	25.37%	20.44%	1.07%
Gross Profit	$4.781B	$20.44B	$5.166B
YoY Change	-7.45%	-1.05%	9.87%
Gross Profit Margin	54.26%	56.8%	61.62%
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$1.460B	$4.353B	$1.428B
YoY Change	2.24%	13.71%	-8.87%
% of Gross Profit	30.54%	21.3%	27.64%
Operating Expenses	$4.080B	$32.14B	$4.095B
YoY Change	-0.37%	8.52%	7.76%
Operating Profit	$706.0M	$3.891B	$1.288B
YoY Change	-45.19%	-11.33%	80.39%
Interest Expense	-$416.0M	$1.529B	-$366.0M
YoY Change	13.66%	0.33%	2.52%
% of Operating Profit	-58.92%	39.3%	-28.42%
Other Income/Expense, Net	-$324.0M	-$1.666B	$304.0M
YoY Change	-206.58%	171.78%	-480.0%
Pretax Income	-$38.00M	$2.225B	$1.221B
YoY Change	-103.11%	-41.06%	224.73%
Income Tax	$26.00M	$118.0M	-$727.0M
% Of Pretax Income		5.3%	-59.54%
Net Earnings	$147.0M	$2.079B	$1.872B
YoY Change	-92.15%	-46.27%	880.1%
Net Earnings / Revenue	1.67%	5.78%	22.33%
Basic Earnings Per Share	$0.16	$2.07	$1.95
Diluted Earnings Per Share	$0.16	$2.07	$1.94
COMMON SHARES
Basic Shares Outstanding		967.0M shares	964.0M shares
Diluted Shares Outstanding		969.0M shares	967.0M shares

Balance Sheet

Concept	2018 Q4	2018	2017 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$1.349B	$1.349B	$898.0M
YoY Change	50.22%	50.22%	-52.36%
Cash & Equivalents	$1.349B	$1.349B	$898.0M
Short-Term Investments
Other Short-Term Assets	$1.238B	$4.244B	$1.260B
YoY Change	-1.75%	12.57%	35.48%
Inventory	$1.685B	$1.685B	$1.651B
Prepaid Expenses
Receivables	$4.607B	$4.794B	$4.445B
Other Receivables	$1.256B	$1.256B	$1.132B
Total Short-Term Assets	$13.33B	$13.33B	$11.90B
YoY Change	12.04%	12.04%	-4.16%
LONG-TERM ASSETS
Property, Plant & Equipment	$76.71B	$76.71B	$74.20B
YoY Change	3.38%	3.38%	3.7%
Goodwill	$6.677B		$6.677B
YoY Change	0.0%		0.0%
Intangibles
YoY Change
Long-Term Investments	$625.0M	$625.0M	$640.0M
YoY Change	-2.34%	-2.34%	1.75%
Other Assets	$1.575B	$21.93B	$1.330B
YoY Change	18.42%	-4.51%	-9.65%
Total Long-Term Assets	$106.3B	$106.3B	$104.9B
YoY Change	1.37%	1.37%	2.32%
TOTAL ASSETS
Total Short-Term Assets	$13.33B	$13.33B	$11.90B
Total Long-Term Assets	$106.3B	$106.3B	$104.9B
Total Assets	$119.6B	$119.6B	$116.8B
YoY Change	2.45%	2.45%	1.62%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$3.800B	$3.800B	$3.532B
YoY Change	7.59%	7.59%	2.64%
Accrued Expenses	$2.112B	$2.112B	$1.837B
YoY Change	14.97%	14.97%	-46.91%
Deferred Revenue	$27.00M		$35.00M
YoY Change	-22.86%
Short-Term Debt	$714.0M	$714.0M	$929.0M
YoY Change	-23.14%	-23.14%	-26.68%
Long-Term Debt Due	$1.349B	$1.349B	$2.088B
YoY Change	-35.39%	-35.39%	-14.07%
Total Short-Term Liabilities	$11.40B	$11.40B	$10.80B
YoY Change	5.61%	5.61%	-19.76%
LONG-TERM LIABILITIES
Long-Term Debt	$34.08B	$34.47B	$32.18B
YoY Change	5.9%	5.83%	1.9%
Other Long-Term Liabilities	$2.130B	$29.40B	$2.097B
YoY Change	1.57%	-1.96%	14.78%
Total Long-Term Liabilities	$36.21B	$63.86B	$34.27B
YoY Change	5.64%	2.1%	2.61%
TOTAL LIABILITIES
Total Short-Term Liabilities	$11.40B	$11.40B	$10.80B
Total Long-Term Liabilities	$36.21B	$63.86B	$34.27B
Total Liabilities	$86.59B	$88.89B	$84.58B
YoY Change	2.37%	2.32%	-3.1%
SHAREHOLDERS EQUITY
Retained Earnings	$14.74B		$14.08B
YoY Change	4.7%		17.05%
Common Stock	$19.12B		$18.96B
YoY Change	0.8%		0.9%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$123.0M		$123.0M
YoY Change	0.0%		-94.71%
Treasury Stock Shares	2.000M shares		2.000M shares
Shareholders Equity	$30.74B	$30.74B	$29.90B
YoY Change
Total Liabilities & Shareholders Equity	$119.6B	$119.6B	$116.8B
YoY Change	2.45%	2.45%	1.62%

Cashflow Statement

Concept	2018 Q4	2018	2017 Q4
OPERATING ACTIVITIES
Net Income	$147.0M	$2.079B	$1.872B
YoY Change	-92.15%	-46.27%	880.1%
Depreciation, Depletion And Amortization	$1.460B	$4.353B	$1.428B
YoY Change	2.24%	13.71%	-8.87%
Cash From Operating Activities	$1.969B	$8.644B	$1.807B
YoY Change	8.97%	15.56%	64.57%
INVESTING ACTIVITIES
Capital Expenditures	-$2.097B	$7.594B	-$2.028B
YoY Change	3.4%	0.13%	-7.19%
Acquisitions
YoY Change
Other Investing Activities	-$128.0M	-$58.00M	-$200.0M
YoY Change	-36.0%	-234.88%	334.78%
Cash From Investing Activities	-$2.225B	-$7.834B	-$2.228B
YoY Change	-0.13%	-1.72%	-0.13%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net		$0.00
YoY Change		-100.0%
Debt Paid & Issued, Net		$1.786B
YoY Change		-28.27%
Cash From Financing Activities	-284.0M	-$219.0M	66.00M
YoY Change	-530.3%	-128.55%	-210.0%
NET CHANGE
Cash From Operating Activities	1.969B	$8.644B	1.807B
Cash From Investing Activities	-2.225B	-$7.834B	-2.228B
Cash From Financing Activities	-284.0M	-$219.0M	66.00M
Net Change In Cash	-540.0M	$591.0M	-355.0M
YoY Change	52.11%	114.13%	-70.24%
FREE CASH FLOW
Cash From Operating Activities	$1.969B	$8.644B	$1.807B
Capital Expenditures	-$2.097B	$7.594B	-$2.028B
Free Cash Flow	$4.066B	$1.050B	$3.835B
YoY Change	6.02%	-1109.62%	16.81%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2018	dei	Amendment Flag AmendmentFlag	false
CY2018	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2018	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2018	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2018
CY2018	dei	Document Period End Date DocumentPeriodEndDate	2018-12-31
CY2018	dei	Document Type DocumentType	10-K
CY2018	dei	Entity Central Index Key EntityCentralIndexKey	0001109357
CY2019Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	969745933	shares
CY2018	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2018	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2018Q2	dei	Entity Public Float EntityPublicFloat	41118095431	USD
CY2018	dei	Entity Registrant Name EntityRegistrantName	EXELON CORP
CY2018	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2018	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2017Q4	exc	Accrued Compensation Current AccruedCompensationCurrent	978000000	USD
CY2018Q4	exc	Accrued Compensation Current AccruedCompensationCurrent	1191000000	USD
CY2017Q4	exc	Accrued Severance Current AccruedSeveranceCurrent	58000000	USD
CY2018Q4	exc	Accrued Severance Current AccruedSeveranceCurrent	44000000	USD
CY2017	exc	Allowable Expensing For Cost Of Qualified Property AllowableExpensingForCostOfQualifiedProperty	0.30
CY2016	exc	Amortization Of Debt Fair Value Adjustment AmortizationOfDebtFairValueAdjustment	-11000000	USD
CY2017	exc	Amortization Of Debt Fair Value Adjustment AmortizationOfDebtFairValueAdjustment	-18000000	USD
CY2018	exc	Amortization Of Debt Fair Value Adjustment AmortizationOfDebtFairValueAdjustment	-15000000	USD
CY2016	exc	Amortization Of Regulatory Asset Debt Costs AmortizationOfRegulatoryAssetDebtCosts	9000000	USD
CY2017	exc	Amortization Of Regulatory Asset Debt Costs AmortizationOfRegulatoryAssetDebtCosts	9000000	USD
CY2018	exc	Amortization Of Regulatory Asset Debt Costs AmortizationOfRegulatoryAssetDebtCosts	8000000	USD
CY2016	exc	Amortization Rate Stabilization Deferral AmortizationRateStabilizationDeferral	76000000	USD
CY2017	exc	Amortization Rate Stabilization Deferral AmortizationRateStabilizationDeferral	-10000000	USD
CY2018	exc	Amortization Rate Stabilization Deferral AmortizationRateStabilizationDeferral	14000000	USD
CY2017Q4	exc	Business Acquisition Residual Commitment BusinessAcquisitionResidualCommitment	55	MW
CY2018Q4	exc	Cash Collateral Held CashCollateralHeld	17000000	USD
CY2016	exc	Changes In Option Premiums Collected Received ChangesInOptionPremiumsCollectedReceived	66000000	USD
CY2017	exc	Changes In Option Premiums Collected Received ChangesInOptionPremiumsCollectedReceived	-28000000	USD
CY2018	exc	Changes In Option Premiums Collected Received ChangesInOptionPremiumsCollectedReceived	43000000	USD
CY2017Q4	exc	Classification Of Obligations Related To Outstanding Performance Share Awards Not Yet Settled Common Stock ClassificationOfObligationsRelatedToOutstandingPerformanceShareAwardsNotYetSettledCommonStock	26000000	USD
CY2018Q4	exc	Classification Of Obligations Related To Outstanding Performance Share Awards Not Yet Settled Common Stock ClassificationOfObligationsRelatedToOutstandingPerformanceShareAwardsNotYetSettledCommonStock	26000000	USD
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CY2018Q4	exc	Classification Of Obligations Related To Outstanding Performance Share Awards Not Yet Settled Current Liabilities ClassificationOfObligationsRelatedToOutstandingPerformanceShareAwardsNotYetSettledCurrentLiabilities	135000000	USD
CY2017Q4	exc	Classification Of Obligations Related To Outstanding Performance Share Awards Not Yet Settled Deferred Credits And Other Liabilities ClassificationOfObligationsRelatedToOutstandingPerformanceShareAwardsNotYetSettledDeferredCreditsAndOtherLiabilities	100000000	USD
CY2018Q4	exc	Classification Of Obligations Related To Outstanding Performance Share Awards Not Yet Settled Deferred Credits And Other Liabilities ClassificationOfObligationsRelatedToOutstandingPerformanceShareAwardsNotYetSettledDeferredCreditsAndOtherLiabilities	109000000	USD
CY2018Q4	exc	Decommissioning Shortfall Percentage DecommissioningShortfallPercentage	0.5
CY2017Q4	exc	Deferred Income Tax Liabilities And Accumulated Deferred Investment Tax Credit DeferredIncomeTaxLiabilitiesAndAccumulatedDeferredInvestmentTaxCredit	-11201000000	USD
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CY2016	exc	Fair Value Of Settled Performance Share Awards FairValueOfSettledPerformanceShareAwards	45000000	USD
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CY2018	exc	Fair Value Of Settled Performance Share Awards FairValueOfSettledPerformanceShareAwards	61000000	USD
CY2016	exc	Fair Value Of Settled Restricted Stock Units FairValueOfSettledRestrictedStockUnits	68000000	USD
CY2017	exc	Fair Value Of Settled Restricted Stock Units FairValueOfSettledRestrictedStockUnits	88000000	USD
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CY2018Q4	exc	Forward Gas Basis ForwardGasBasis	0.64	USD
CY2018Q4	exc	Forward Power Basis ForwardPowerBasis	3.18	USD
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CY2018	exc	Minimum Expectation Of Tax Position To Be Realized MinimumExpectationOfTaxPositionToBeRealized	0.5
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CY2016	exc	Net Interest Income Expense Related To Uncertain Tax Positions NetInterestIncomeExpenseRelatedToUncertainTaxPositions	165000000	USD
CY2017	exc	Net Interest Income Expense Related To Uncertain Tax Positions NetInterestIncomeExpenseRelatedToUncertainTaxPositions	37000000	USD
CY2018	exc	Net Interest Income Expense Related To Uncertain Tax Positions NetInterestIncomeExpenseRelatedToUncertainTaxPositions	-3000000	USD
CY2017Q4	exc	Net Interest Receivable Payable Related To Uncertain Tax Positions NetInterestReceivablePayableRelatedToUncertainTaxPositions	233000000	USD
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CY2016	exc	Net Unrealized Gain Loss On Pledged Assets NetUnrealizedGainLossOnPledgedAssets	1000000	USD
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CY2017	exc	Non Cash Dissolutionof Financing Trust Dueto Longterm Debt Retirement NonCashDissolutionofFinancingTrustDuetoLongtermDebtRetirement	8000000	USD
CY2017Q4	exc	Number Of Variable Interest Entities Consolidated NumberOfVariableInterestEntitiesConsolidated	5	VIE
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CY2018	exc	Operating Lease Estimated Lease Liabilities OperatingLeaseEstimatedLeaseLiabilities	$1,600-$1,700
CY2018	exc	Operating Lease Estimated Rightof Use Assets OperatingLeaseEstimatedRightofUseAssets	$1,400-$1,500
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CY2017Q4	exc	Other Nonconsolidated Variable Interest Entity Ownership Interests OtherNonconsolidatedVariableInterestEntityOwnershipInterests	618000000	USD
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CY2016	exc	Performance Share Awards Obligations Settled In Cash PerformanceShareAwardsObligationsSettledInCash	28000000	USD
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CY2017Q4	exc	Power Volume PowerVolume	10	MW
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CY2016	exc	Unrealized Gain Loss Nuclear Decommissioning Trust Funds Nonregulatory Accounting UnrealizedGainLossNuclearDecommissioningTrustFundsNonregulatoryAccounting	194000000	USD
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CY2017	exc	Unrealized Gain Loss Nuclear Decommissioning Trust Funds Regulatory Accounting UnrealizedGainLossNuclearDecommissioningTrustFundsRegulatoryAccounting	455000000	USD
CY2018	exc	Unrealized Gain Loss Nuclear Decommissioning Trust Funds Regulatory Accounting UnrealizedGainLossNuclearDecommissioningTrustFundsRegulatoryAccounting	-715000000	USD
CY2016Q4	exc	Unrecognized Tax Benefits For Which Timing Of Ultimate Benefits Uncertain UnrecognizedTaxBenefitsForWhichTimingOfUltimateBenefitsUncertain	83000000	USD
CY2017Q4	exc	Unrecognized Tax Benefits For Which Timing Of Ultimate Benefits Uncertain UnrecognizedTaxBenefitsForWhichTimingOfUltimateBenefitsUncertain	7000000	USD
CY2016	exc	Unrecognized Tax Benefits Interest Income UnrecognizedTaxBenefitsInterestIncome	13000000	USD
CY2017	exc	Unrecognized Tax Benefits Interest Income UnrecognizedTaxBenefitsInterestIncome	3000000	USD
CY2018	exc	Unrecognized Tax Benefits Interest Income UnrecognizedTaxBenefitsInterestIncome	5000000	USD
CY2018	exc	Weighted Average Period Non Vested Performance Share Awards Are Expected To Be Recognized Over WeightedAveragePeriodNonVestedPerformanceShareAwardsAreExpectedToBeRecognizedOver	P1Y8M
CY2017Q4	invest	Derivative Notional Amount DerivativeNotionalAmount	3606000000	USD
CY2018Q4	invest	Derivative Notional Amount DerivativeNotionalAmount	5991000000	USD
CY2017Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	3532000000	USD
CY2018Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	3800000000	USD
CY2017Q4	us-gaap	Accounts Payable Other Current AccountsPayableOtherCurrent	-11000000	USD
CY2018Q4	us-gaap	Accounts Payable Other Current AccountsPayableOtherCurrent	-17000000	USD
CY2017Q4	us-gaap	Accounts Payable Related Parties Current AccountsPayableRelatedPartiesCurrent	5000000	USD
CY2018Q4	us-gaap	Accounts Payable Related Parties Current AccountsPayableRelatedPartiesCurrent	5000000	USD
CY2017Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	4445000000	USD
CY2018Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	4607000000	USD
CY2017Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	1837000000	USD
CY2018Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	2112000000	USD
CY2017Q4	us-gaap	Accumulated Deferred Investment Tax Credit AccumulatedDeferredInvestmentTaxCredit	-732000000	USD
CY2018Q4	us-gaap	Accumulated Deferred Investment Tax Credit AccumulatedDeferredInvestmentTaxCredit	-724000000	USD
CY2017Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	21064000000	USD
CY2018Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	22902000000	USD
CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-3026000000	USD
CY2018Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-2995000000	USD
CY2016	us-gaap	Adjustments Noncash Items To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	1333000000	USD
CY2017	us-gaap	Adjustments Noncash Items To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	721000000	USD
CY2018	us-gaap	Adjustments Noncash Items To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	1124000000	USD
CY2017	us-gaap	Adjustments To Additional Paid In Capital Other AdjustmentsToAdditionalPaidInCapitalOther	0	USD
CY2016	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	175000000	USD
CY2017	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	191000000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	208000000	USD
CY2016	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	107000000	USD
CY2017	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	117000000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	154000000	USD
CY2017Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	322000000	USD
CY2018Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	319000000	USD
CY2016	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	5000000	USD
CY2017Q4	us-gaap	Allowance For Doubtful Other Receivables Current AllowanceForDoubtfulOtherReceivablesCurrent	31000000	USD
CY2018Q4	us-gaap	Allowance For Doubtful Other Receivables Current AllowanceForDoubtfulOtherReceivablesCurrent	34000000	USD
CY2016	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	35000000	USD
CY2017	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	64000000	USD
CY2018	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	36000000	USD
CY2016	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	-336000000	USD
CY2017	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	-237000000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	-109000000	USD
CY2016	us-gaap	Amortization Of Nuclear Fuel Lease AmortizationOfNuclearFuelLease	1159000000	USD
CY2017	us-gaap	Amortization Of Nuclear Fuel Lease AmortizationOfNuclearFuelLease	1096000000	USD
CY2018	us-gaap	Amortization Of Nuclear Fuel Lease AmortizationOfNuclearFuelLease	1115000000	USD
CY2016	us-gaap	Amortization Of Regulatory Asset AmortizationOfRegulatoryAsset	407000000	USD
CY2017	us-gaap	Amortization Of Regulatory Asset AmortizationOfRegulatoryAsset	478000000	USD
CY2018	us-gaap	Amortization Of Regulatory Asset AmortizationOfRegulatoryAsset	555000000	USD
CY2017Q4	us-gaap	Amount Of Impairment To Carrying Amount Of Regulatory Assets AmountOfImpairmentToCarryingAmountOfRegulatoryAssets	35000000	USD
CY2016	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	446000000	USD
CY2017	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	468000000	USD
CY2018	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	489000000	USD
CY2016	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	2000000	USD
CY2018	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	20000000	USD
CY2017Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	10029000000	USD
CY2018Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	9679000000	USD
CY2017Q4	us-gaap	Assets Assets	116770000000	USD
CY2018Q4	us-gaap	Assets Assets	119666000000	USD
CY2017Q4	us-gaap	Assets Current AssetsCurrent	11896000000	USD
CY2018Q4	us-gaap	Assets Current AssetsCurrent	13360000000	USD
CY2017Q4	us-gaap	Assets Of Disposal Group Including Discontinued Operation Current AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent	0	USD
CY2018Q4	us-gaap	Assets Of Disposal Group Including Discontinued Operation Current AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent	904000000	USD
CY2016	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	2.85
CY2017	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	1.69
CY2016	us-gaap	Business Acquisition Pro Forma Earnings Per Share Diluted BusinessAcquisitionProFormaEarningsPerShareDiluted	2.84
CY2017	us-gaap	Business Acquisition Pro Forma Earnings Per Share Diluted BusinessAcquisitionProFormaEarningsPerShareDiluted	1.69
CY2016	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	2618000000	USD
CY2017	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	1562000000	USD
CY2016	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	33823000000	USD
CY2017	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	32342000000	USD
CY2016	us-gaap	Business Combination Bargain Purchase Gain Recognized Amount BusinessCombinationBargainPurchaseGainRecognizedAmount	0	USD
CY2017	us-gaap	Business Combination Bargain Purchase Gain Recognized Amount BusinessCombinationBargainPurchaseGainRecognizedAmount	233000000	USD
CY2018	us-gaap	Business Combination Bargain Purchase Gain Recognized Amount BusinessCombinationBargainPurchaseGainRecognizedAmount	0	USD
CY2016Q1	us-gaap	Business Combination Contingent Consideration Asset BusinessCombinationContingentConsiderationAsset	235000000	USD
CY2016	us-gaap	Business Combination Integration Related Costs BusinessCombinationIntegrationRelatedCosts	143000000	USD
CY2017	us-gaap	Business Combination Integration Related Costs BusinessCombinationIntegrationRelatedCosts	16000000	USD
CY2018	us-gaap	Business Combination Integration Related Costs BusinessCombinationIntegrationRelatedCosts	7000000	USD
CY2016	us-gaap	Business Combination Step Acquisition Equity Interest In Acquiree Remeasurement Gain Or Loss BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGainOrLoss	0	USD
CY2017	us-gaap	Business Combination Step Acquisition Equity Interest In Acquiree Remeasurement Gain Or Loss BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGainOrLoss	213000000	USD
CY2018	us-gaap	Business Combination Step Acquisition Equity Interest In Acquiree Remeasurement Gain Or Loss BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGainOrLoss	0	USD
CY2016	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	-128000000	USD
CY2017	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	42000000	USD
CY2018	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	-69000000	USD
CY2016	us-gaap	Capital Leases Income Statement Direct Financing Lease Revenue CapitalLeasesIncomeStatementDirectFinancingLeaseRevenue	4000000	USD
CY2016Q1	us-gaap	Capital Leases Net Investment In Direct Financing Leases Unguaranteed Residual Values Of Leased Property CapitalLeasesNetInvestmentInDirectFinancingLeasesUnguaranteedResidualValuesOfLeasedProperty	356000000	USD
CY2016	us-gaap	Capitalized Computer Software Amortization1 CapitalizedComputerSoftwareAmortization1	255000000	USD
CY2017	us-gaap	Capitalized Computer Software Amortization1 CapitalizedComputerSoftwareAmortization1	270000000	USD
CY2018	us-gaap	Capitalized Computer Software Amortization1 CapitalizedComputerSoftwareAmortization1	282000000	USD
CY2017Q4	us-gaap	Capitalized Computer Software Net CapitalizedComputerSoftwareNet	834000000	USD
CY2018Q4	us-gaap	Capitalized Computer Software Net CapitalizedComputerSoftwareNet	810000000	USD
CY2017	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	30000000	USD
CY2018	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	22000000	USD
CY2017Q4	us-gaap	Capitalized Contract Cost Gross CapitalizedContractCostGross	26000000	USD
CY2018Q4	us-gaap	Capitalized Contract Cost Gross CapitalizedContractCostGross	32000000	USD
CY2016Q4	us-gaap	Capitalized Costs Asset Retirement Costs CapitalizedCostsAssetRetirementCosts	191000000	USD
CY2017Q4	us-gaap	Capitalized Costs Asset Retirement Costs CapitalizedCostsAssetRetirementCosts	29000000	USD
CY2018Q4	us-gaap	Capitalized Costs Asset Retirement Costs CapitalizedCostsAssetRetirementCosts	-107000000	USD
CY2016	us-gaap	Cash Acquired From Acquisition CashAcquiredFromAcquisition	0	USD
CY2017	us-gaap	Cash Acquired From Acquisition CashAcquiredFromAcquisition	-87000000	USD
CY2018	us-gaap	Cash Acquired From Acquisition CashAcquiredFromAcquisition	0	USD
CY2015Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	6502000000	USD
CY2016Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	635000000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	898000000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1349000000	USD
CY2016	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-5798000000	USD
CY2017	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	276000000	USD
CY2018	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	591000000	USD
CY2015Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	6712000000	USD
CY2016Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	914000000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1190000000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1781000000	USD
CY2017Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2018Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2012Q1	us-gaap	Commitments And Contingencies CommitmentsAndContingencies	1000000000	USD
CY2016	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.26
CY2017	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.31
CY2018	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.38
CY2017Q4	us-gaap	Common Stock No Par Value CommonStockNoParValue	0
CY2018Q4	us-gaap	Common Stock No Par Value CommonStockNoParValue	0
CY2017Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	2000000000	shares
CY2018Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	2000000000	shares
CY2017Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	963335888	shares
CY2018Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	968187955	shares
CY2017Q4	us-gaap	Common Stock Value CommonStockValue	18964000000	USD
CY2018Q4	us-gaap	Common Stock Value CommonStockValue	19116000000	USD
CY2016	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1085000000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	3959000000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	2051000000	USD
CY2016	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	75000000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	88000000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	75000000	USD
CY2016	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	1160000000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	4047000000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	2126000000	USD
CY2018	us-gaap	Contract With Customer Asset Cumulative Catch Up Adjustment To Revenue Change In Measure Of Progress ContractWithCustomerAssetCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress	50000000	USD
CY2017Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	283000000	USD
CY2018Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	187000000	USD
CY2018	us-gaap	Contract With Customer Asset Reclassified To Receivable ContractWithCustomerAssetReclassifiedToReceivable	-146000000	USD
CY2018	us-gaap	Contract With Customer Liability Change In Timeframe Performance Obligation Satisfied Revenue Recognized ContractWithCustomerLiabilityChangeInTimeframePerformanceObligationSatisfiedRevenueRecognized	-187000000	USD
CY2018	us-gaap	Contract With Customer Liability Cumulative Catch Up Adjustment To Revenue Change In Measure Of Progress ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress	179000000	USD
CY2017Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	35000000	USD
CY2018Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	27000000	USD
CY2018Q4	us-gaap	Contractual Obligation ContractualObligation	3507000000	USD
CY2018Q4	us-gaap	Contractual Obligation Due After Fifth Year ContractualObligationDueAfterFifthYear	388000000	USD
CY2018Q4	us-gaap	Contractual Obligation Due In Fifth Year ContractualObligationDueInFifthYear	3000000	USD
CY2018Q4	us-gaap	Contractual Obligation Due In Fourth Year ContractualObligationDueInFourthYear	3000000	USD
CY2018Q4	us-gaap	Contractual Obligation Due In Next Twelve Months ContractualObligationDueInNextTwelveMonths	2728000000	USD
CY2018Q4	us-gaap	Contractual Obligation Due In Second Year ContractualObligationDueInSecondYear	344000000	USD
CY2018Q4	us-gaap	Contractual Obligation Due In Third Year ContractualObligationDueInThirdYear	41000000	USD
CY2017Q4	us-gaap	Cost Method Investments CostMethodInvestments	62000000	USD
CY2018Q4	us-gaap	Cost Method Investments CostMethodInvestments	72000000	USD
CY2016	us-gaap	Cost Of Goods And Services Energy Commodities And Services CostOfGoodsAndServicesEnergyCommoditiesAndServices	8817000000	USD
CY2017	us-gaap	Cost Of Goods And Services Energy Commodities And Services CostOfGoodsAndServicesEnergyCommoditiesAndServices	9668000000	USD
CY2018	us-gaap	Cost Of Goods And Services Energy Commodities And Services CostOfGoodsAndServicesEnergyCommoditiesAndServices	11679000000	USD
CY2016	us-gaap	Cost Of Purchased Power CostOfPurchasedPower	3823000000	USD
CY2017	us-gaap	Cost Of Purchased Power CostOfPurchasedPower	4367000000	USD
CY2018	us-gaap	Cost Of Purchased Power CostOfPurchasedPower	4991000000	USD
CY2016	us-gaap	Costs And Expenses CostsAndExpenses	28106000000	USD
CY2017	us-gaap	Costs And Expenses CostsAndExpenses	29619000000	USD
CY2018	us-gaap	Costs And Expenses CostsAndExpenses	32143000000	USD
CY2017Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	33657000000	USD
CY2018Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	34911000000	USD
CY2018Q4	us-gaap	Debt Instrument Collateral Amount DebtInstrumentCollateralAmount	3000000000	USD
CY2018	us-gaap	Debt Instrument Covenant Compliance DebtInstrumentCovenantCompliance	7.34
CY2017Q4	us-gaap	Debt Instrument Fair Value DebtInstrumentFairValue	865000000	USD
CY2018Q4	us-gaap	Debt Instrument Fair Value DebtInstrumentFairValue	795000000	USD
CY2017Q4	us-gaap	Debt Instrument Unamortized Discount Premium Net DebtInstrumentUnamortizedDiscountPremiumNet	-57000000	USD
CY2018Q4	us-gaap	Debt Instrument Unamortized Discount Premium Net DebtInstrumentUnamortizedDiscountPremiumNet	-66000000	USD
CY2017Q4	us-gaap	Decommissioning Fund Investments DecommissioningFundInvestments	13272000000	USD
CY2018Q4	us-gaap	Decommissioning Fund Investments DecommissioningFundInvestments	11661000000	USD
CY2017Q4	us-gaap	Deconsolidation Gain Or Loss Amount DeconsolidationGainOrLossAmount	213000000	USD
CY2016	us-gaap	Deconsolidation Gain Or Loss Amount DeconsolidationGainOrLossAmount	0	USD
CY2017	us-gaap	Deconsolidation Gain Or Loss Amount DeconsolidationGainOrLossAmount	213000000	USD
CY2018	us-gaap	Deconsolidation Gain Or Loss Amount DeconsolidationGainOrLossAmount	0	USD
CY2018Q4	us-gaap	Decrease In Unrecognized Tax Benefits Is Reasonably Possible DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible	241000000	USD
CY2018Q3	us-gaap	Decrease In Unrecognized Tax Benefits Is Reasonably Possible DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible	90000000	USD
CY2017Q4	us-gaap	Deferred Costs And Other Assets DeferredCostsAndOtherAssets	30672000000	USD
CY2018Q4	us-gaap	Deferred Costs And Other Assets DeferredCostsAndOtherAssets	29599000000	USD
CY2017Q4	us-gaap	Deferred Credits And Other Liabilities DeferredCreditsAndOtherLiabilities	41220000000	USD
CY2018Q4	us-gaap	Deferred Credits And Other Liabilities DeferredCreditsAndOtherLiabilities	40727000000	USD
CY2017Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	201000000	USD
CY2018Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	216000000	USD
CY2017Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	-10469000000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	-10573000000	USD
CY2017Q4	us-gaap	Deferred Income Taxes And Other Tax Liabilities Noncurrent DeferredIncomeTaxesAndOtherTaxLiabilitiesNoncurrent	11235000000	USD
CY2018Q4	us-gaap	Deferred Income Taxes And Other Tax Liabilities Noncurrent DeferredIncomeTaxesAndOtherTaxLiabilitiesNoncurrent	11330000000	USD
CY2016	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	656000000	USD
CY2017	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	-362000000	USD
CY2018	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	-106000000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Equity Method Investments DeferredTaxAssetsEquityMethodInvestments	434000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Equity Method Investments DeferredTaxAssetsEquityMethodInvestments	797000000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Subject To Expiration DeferredTaxAssetsOperatingLossCarryforwardsSubjectToExpiration	-344000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Subject To Expiration DeferredTaxAssetsOperatingLossCarryforwardsSubjectToExpiration	-237000000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards General Business DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness	-861000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards General Business DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness	-811000000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Deferred Financing Costs DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts	217000000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Deferred Financing Costs DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts	234000000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Derivatives DeferredTaxLiabilitiesDerivatives	-85000000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Derivatives DeferredTaxLiabilitiesDerivatives	89000000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Investments DeferredTaxLiabilitiesInvestments	-553000000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Investments DeferredTaxLiabilitiesInvestments	-351000000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	746000000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	934000000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Other Finite Lived Assets DeferredTaxLiabilitiesOtherFiniteLivedAssets	150000000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Other Finite Lived Assets DeferredTaxLiabilitiesOtherFiniteLivedAssets	117000000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	-12490000000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	-12533000000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Regulatory Assets And Liabilities DeferredTaxLiabilitiesRegulatoryAssetsAndLiabilities	-688000000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Regulatory Assets And Liabilities DeferredTaxLiabilitiesRegulatoryAssetsAndLiabilities	-749000000	USD
CY2017Q4	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	3736000000	USD
CY2018Q4	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	3988000000	USD
CY2018Q1	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Gains Losses After Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesAfterTax	18000000	USD
CY2017	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	13000000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Next Twelve Months DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths	25000000	USD
CY2016	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	116000000	USD
CY2017	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	109000000	USD
CY2018	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	47000000	USD
CY2016	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	164000000	USD
CY2017	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	128000000	USD
CY2018	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	179000000	USD
CY2016	us-gaap	Depreciation Depreciation	3477000000	USD
CY2017	us-gaap	Depreciation Depreciation	3293000000	USD
CY2018	us-gaap	Depreciation Depreciation	3740000000	USD
CY2016	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	5576000000	USD
CY2017	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	5427000000	USD
CY2018	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	5971000000	USD
CY2016	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	3936000000	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	3828000000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	4353000000	USD
CY2017Q4	us-gaap	Derivative Asset Notional Amount DerivativeAssetNotionalAmount	811000000	USD
CY2018Q4	us-gaap	Derivative Asset Notional Amount DerivativeAssetNotionalAmount	1432000000	USD
CY2017Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	976000000	USD
CY2018Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	804000000	USD
CY2017Q4	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	337000000	USD
CY2018Q4	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	452000000	USD
CY2017Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	77000000	USD
CY2018Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	50000000	USD
CY2017Q4	us-gaap	Derivative Fair Value Of Derivative Net DerivativeFairValueOfDerivativeNet	6000000	USD
CY2018Q4	us-gaap	Derivative Fair Value Of Derivative Net DerivativeFairValueOfDerivativeNet	1000000	USD
CY2017Q4	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Asset At Fair Value DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue	-1000000	USD
CY2018Q4	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Asset At Fair Value DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue	-44000000	USD
CY2017Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	232000000	USD
CY2018Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	475000000	USD
CY2017Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	409000000	USD
CY2018Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	479000000	USD
CY2016	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	1172000000	USD
CY2017	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	1243000000	USD
CY2018	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	1339000000	USD
CY2016	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	8000000	USD
CY2016	us-gaap	Dividends Stock DividendsStock	6000000	USD
CY2017	us-gaap	Dividends Stock DividendsStock	7000000	USD
CY2018	us-gaap	Dividends Stock DividendsStock	6000000	USD
CY2017Q4	us-gaap	Due To Affiliate Noncurrent DueToAffiliateNoncurrent	389000000	USD
CY2018Q4	us-gaap	Due To Affiliate Noncurrent DueToAffiliateNoncurrent	390000000	USD
CY2016	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.21
CY2017Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.07
CY2017Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.10
CY2017Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.86
CY2017Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.95
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.00
CY2018Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.61
CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.56
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.76
CY2018Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.16
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.08
CY2016	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.21
CY2017Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.06
CY2017Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.10
CY2017Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.85
CY2017Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.94
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.99
CY2018Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.60
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.56
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.76
CY2018Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.16
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.07
CY2016	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.382
CY2017	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.033
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.054
CY2016	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	-0.331
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0.009
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Deductions Other EffectiveIncomeTaxRateReconciliationDeductionsOther	0.049
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Deductions Other EffectiveIncomeTaxRateReconciliationDeductionsOther	0.017
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Deductions Other EffectiveIncomeTaxRateReconciliationDeductionsOther	0.035
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Minority Interest Income Expense EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpense	0.002
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Minority Interest Income Expense EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpense	0.010
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.007
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.001
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.010
CY2016	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.033
CY2017	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.023
CY2018	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.006
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Investment EffectiveIncomeTaxRateReconciliationTaxCreditsInvestment	0.012
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Investment EffectiveIncomeTaxRateReconciliationTaxCreditsInvestment	0.009
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Investment EffectiveIncomeTaxRateReconciliationTaxCreditsInvestment	0.012
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Other EffectiveIncomeTaxRateReconciliationTaxCreditsOther	0.036
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Other EffectiveIncomeTaxRateReconciliationTaxCreditsOther	0.018
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Other EffectiveIncomeTaxRateReconciliationTaxCreditsOther	0.022
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Tax Settlements EffectiveIncomeTaxRateReconciliationTaxSettlements	-0.004
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Tax Settlements Other EffectiveIncomeTaxRateReconciliationTaxSettlementsOther	-0.012
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Settlements Other EffectiveIncomeTaxRateReconciliationTaxSettlementsOther	-0.083
CY2016	us-gaap	Electric Utility Revenue ElectricUtilityRevenue	0	USD
CY2017	us-gaap	Electric Utility Revenue ElectricUtilityRevenue	0	USD
CY2016	us-gaap	Electrical Generation Revenue ElectricalGenerationRevenue	16330000000	USD
CY2017	us-gaap	Electrical Generation Revenue ElectricalGenerationRevenue	17394000000	USD
CY2018	us-gaap	Electrical Generation Revenue ElectricalGenerationRevenue	19168000000	USD
CY2016	us-gaap	Employee Benefits And Share Based Compensation Noncash EmployeeBenefitsAndShareBasedCompensationNoncash	70000000	USD
CY2017	us-gaap	Employee Benefits And Share Based Compensation Noncash EmployeeBenefitsAndShareBasedCompensationNoncash	109000000	USD
CY2018	us-gaap	Employee Benefits And Share Based Compensation Noncash EmployeeBenefitsAndShareBasedCompensationNoncash	140000000	USD
CY2018Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Share Based Awards Other Than Options EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions	33000000	USD
CY2016	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	18000000	USD
CY2017Q4	us-gaap	Energy Marketing Accounts Payable EnergyMarketingAccountsPayable	352000000	USD
CY2018Q4	us-gaap	Energy Marketing Accounts Payable EnergyMarketingAccountsPayable	344000000	USD
CY2017Q4	us-gaap	Energy Marketing Contract Liabilities Current EnergyMarketingContractLiabilitiesCurrent	231000000	USD
CY2018Q4	us-gaap	Energy Marketing Contract Liabilities Current EnergyMarketingContractLiabilitiesCurrent	149000000	USD
CY2017Q4	us-gaap	Energy Marketing Contract Liabilities Noncurrent EnergyMarketingContractLiabilitiesNoncurrent	609000000	USD
CY2018Q4	us-gaap	Energy Marketing Contract Liabilities Noncurrent EnergyMarketingContractLiabilitiesNoncurrent	463000000	USD
CY2017Q4	us-gaap	Energy Marketing Contracts Assets Current EnergyMarketingContractsAssetsCurrent	60000000	USD
CY2018Q4	us-gaap	Energy Marketing Contracts Assets Current EnergyMarketingContractsAssetsCurrent	48000000	USD
CY2017Q4	us-gaap	Energy Marketing Contracts Assets Noncurrent EnergyMarketingContractsAssetsNoncurrent	395000000	USD
CY2018Q4	us-gaap	Energy Marketing Contracts Assets Noncurrent EnergyMarketingContractsAssetsNoncurrent	372000000	USD
CY2017Q4	us-gaap	Energy Related Inventory Other Fossil Fuel EnergyRelatedInventoryOtherFossilFuel	340000000	USD
CY2018Q4	us-gaap	Energy Related Inventory Other Fossil Fuel EnergyRelatedInventoryOtherFossilFuel	334000000	USD
CY2017	us-gaap	Environmental Expense And Liabilities EnvironmentalExpenseAndLiabilities	44000000	USD
CY2017Q4	us-gaap	Equity Method Investment Aggregate Cost EquityMethodInvestmentAggregateCost	297000000	USD
CY2018Q4	us-gaap	Equity Method Investment Aggregate Cost EquityMethodInvestmentAggregateCost	267000000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	1255000000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	1149000000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	1228000000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	1267000000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	-27000000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	118000000	USD
CY2016	us-gaap	Gain Loss On Cash Flow Hedge Ineffectiveness Net GainLossOnCashFlowHedgeIneffectivenessNet	14000000	USD
CY2017	us-gaap	Gain Loss On Cash Flow Hedge Ineffectiveness Net GainLossOnCashFlowHedgeIneffectivenessNet	15000000	USD
CY2018	us-gaap	Gain Loss On Cash Flow Hedge Ineffectiveness Net GainLossOnCashFlowHedgeIneffectivenessNet	9000000	USD
CY2016Q1	us-gaap	Gain Loss On Contract Termination GainLossOnContractTermination	4000000	USD
CY2016	us-gaap	Gain Loss On Investments GainLossOnInvestments	229000000	USD
CY2017	us-gaap	Gain Loss On Investments GainLossOnInvestments	616000000	USD
CY2018	us-gaap	Gain Loss On Investments GainLossOnInvestments	-303000000	USD
CY2016	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	-48000000	USD
CY2017	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	3000000	USD
CY2018	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	56000000	USD
CY2016	us-gaap	Gain Loss On Sales Of Assets And Asset Impairment Charges GainLossOnSalesOfAssetsAndAssetImpairmentCharges	-48000000	USD
CY2017	us-gaap	Gain Loss On Sales Of Assets And Asset Impairment Charges GainLossOnSalesOfAssetsAndAssetImpairmentCharges	3000000	USD
CY2018	us-gaap	Gain Loss On Sales Of Assets And Asset Impairment Charges GainLossOnSalesOfAssetsAndAssetImpairmentCharges	56000000	USD
CY2016	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-3000000	USD
CY2016	us-gaap	Gas Domestic Regulated Revenue GasDomesticRegulatedRevenue	0	USD
CY2017	us-gaap	Gas Domestic Regulated Revenue GasDomesticRegulatedRevenue	0	USD
CY2016Q4	us-gaap	Goodwill Goodwill	6677000000	USD
CY2017Q4	us-gaap	Goodwill Goodwill	6677000000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	6677000000	USD
CY2016Q4	us-gaap	Goodwill Gross GoodwillGross	8660000000	USD
CY2017Q4	us-gaap	Goodwill Gross GoodwillGross	8660000000	USD
CY2018Q4	us-gaap	Goodwill Gross GoodwillGross	8660000000	USD
CY2016Q4	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	1983000000	USD
CY2017Q4	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	1983000000	USD
CY2018Q4	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	1983000000	USD
CY2017	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2018	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2018Q4	us-gaap	Guarantee Obligations Maximum Exposure GuaranteeObligationsMaximumExposure	61000000	USD
CY2016	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	306000000	USD
CY2017	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	573000000	USD
CY2018	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	50000000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1973000000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	3782000000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	2232000000	USD
CY2016	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-24000000	USD
CY2017	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-32000000	USD
CY2018	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-28000000	USD
CY2016	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-24000000	USD
CY2017	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-32000000	USD
CY2018	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-28000000	USD
CY2017	us-gaap	Income Tax Effects Allocated Directly To Equity Other IncomeTaxEffectsAllocatedDirectlyToEquityOther	0	USD
CY2018	us-gaap	Income Tax Effects Allocated Directly To Equity Other IncomeTaxEffectsAllocatedDirectlyToEquityOther	0	USD
CY2016	us-gaap	Income Tax Examination Penalties And Interest Expense IncomeTaxExaminationPenaltiesAndInterestExpense	106000000	USD
CY2017	us-gaap	Income Tax Examination Penalties And Interest Expense IncomeTaxExaminationPenaltiesAndInterestExpense	-2000000	USD
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	753000000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-126000000	USD
CY2018Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	26000000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	120000000	USD
CY2016	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-441000000	USD
CY2017	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	540000000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	95000000	USD
CY2016	us-gaap	Increase Decrease Cash Collateral From Counterparties IncreaseDecreaseCashCollateralFromCounterparties	931000000	USD
CY2017	us-gaap	Increase Decrease Cash Collateral From Counterparties IncreaseDecreaseCashCollateralFromCounterparties	-158000000	USD
CY2018	us-gaap	Increase Decrease Cash Collateral From Counterparties IncreaseDecreaseCashCollateralFromCounterparties	82000000	USD
CY2016	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	771000000	USD
CY2017	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-388000000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	551000000	USD
CY2016	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	576000000	USD
CY2017	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	299000000	USD
CY2018	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	340000000	USD
CY2016	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-7000000	USD
CY2017	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	72000000	USD
CY2018	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	37000000	USD
CY2016	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	589000000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	675000000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	965000000	USD
CY2018Q1	us-gaap	Increase Decrease In Pension Plan Obligations IncreaseDecreaseInPensionPlanObligations	23000000	USD
CY2018Q1	us-gaap	Increase Decrease In Postretirement Obligations IncreaseDecreaseInPostretirementObligations	14000000	USD
CY2016	us-gaap	Increase Decrease In Prepaid Taxes IncreaseDecreaseInPrepaidTaxes	1250000000	USD
CY2017	us-gaap	Increase Decrease In Prepaid Taxes IncreaseDecreaseInPrepaidTaxes	0	USD
CY2018	us-gaap	Increase Decrease In Prepaid Taxes IncreaseDecreaseInPrepaidTaxes	0	USD
CY2016	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	432000000	USD
CY2017	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	470000000	USD
CY2018	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	565000000	USD
CY2018Q3	us-gaap	Increase In Unrecognized Tax Benefits Is Reasonably Possible IncreaseInUnrecognizedTaxBenefitsIsReasonablyPossible	71000000	USD
CY2016	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	3000000	shares
CY2017	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	2000000	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	2000000	shares
CY2018Q4	us-gaap	Line Of Credit Facility Current Borrowing Capacity LineOfCreditFacilityCurrentBorrowingCapacity	135000000	USD
CY2018Q4	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	9704000000	USD
CY2016	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	108000000	USD
CY2017	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	63000000	USD
CY2018	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	31000000	USD
CY2016	us-gaap	Interest Costs Incurred InterestCostsIncurred	1678000000	USD
CY2017	us-gaap	Interest Costs Incurred InterestCostsIncurred	1658000000	USD
CY2018	us-gaap	Interest Costs Incurred InterestCostsIncurred	1695000000	USD
CY2016	us-gaap	Interest Expense InterestExpense	1495000000	USD
CY2017	us-gaap	Interest Expense InterestExpense	1524000000	USD
CY2018	us-gaap	Interest Expense InterestExpense	1529000000	USD
CY2016	us-gaap	Interest Expense Related Party InterestExpenseRelatedParty	41000000	USD
CY2017	us-gaap	Interest Expense Related Party InterestExpenseRelatedParty	36000000	USD
CY2018	us-gaap	Interest Expense Related Party InterestExpenseRelatedParty	25000000	USD
CY2016	us-gaap	Interest Paid Net InterestPaidNet	1340000000	USD
CY2017	us-gaap	Interest Paid Net InterestPaidNet	2430000000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	1421000000	USD
CY2017Q4	us-gaap	Interest Payable Current InterestPayableCurrent	328000000	USD
CY2018Q4	us-gaap	Interest Payable Current InterestPayableCurrent	334000000	USD
CY2016	us-gaap	Interest Revenue Expense Net InterestRevenueExpenseNet	1536000000	USD
CY2017	us-gaap	Interest Revenue Expense Net InterestRevenueExpenseNet	1560000000	USD
CY2018	us-gaap	Interest Revenue Expense Net InterestRevenueExpenseNet	1554000000	USD
CY2017Q4	us-gaap	Inventory Raw Materials And Supplies Net Of Reserves InventoryRawMaterialsAndSuppliesNetOfReserves	1311000000	USD
CY2018Q4	us-gaap	Inventory Raw Materials And Supplies Net Of Reserves InventoryRawMaterialsAndSuppliesNetOfReserves	1351000000	USD
CY2016	us-gaap	Inventory Write Down InventoryWriteDown	12000000	USD
CY2017	us-gaap	Inventory Write Down InventoryWriteDown	56000000	USD
CY2018	us-gaap	Inventory Write Down InventoryWriteDown	24000000	USD
CY2016	us-gaap	Investment Income Interest InvestmentIncomeInterest	17000000	USD
CY2017	us-gaap	Investment Income Interest InvestmentIncomeInterest	8000000	USD
CY2018	us-gaap	Investment Income Interest InvestmentIncomeInterest	43000000	USD
CY2016	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	777000000	USD
CY2017	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	709000000	USD
CY2018	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	670000000	USD
CY2018Q4	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	1696000000	USD
CY2017Q4	us-gaap	Liabilities Liabilities	84583000000	USD
CY2018Q4	us-gaap	Liabilities Liabilities	86596000000	USD
CY2017Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	116770000000	USD
CY2018Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	119666000000	USD
CY2017Q4	us-gaap	Liabilities Current LiabilitiesCurrent	10798000000	USD
CY2018Q4	us-gaap	Liabilities Current LiabilitiesCurrent	11404000000	USD
CY2017Q4	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation Current LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent	0	USD
CY2018Q4	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation Current LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent	777000000	USD
CY2018Q4	us-gaap	Line Of Credit LineOfCredit	0	USD
CY2018Q4	us-gaap	Line Of Credit Facility Capacity Available For Trade Purchases LineOfCreditFacilityCapacityAvailableForTradePurchases	7687000000	USD
CY2018	us-gaap	Line Of Credit Facility Covenant Terms LineOfCreditFacilityCovenantTerms	2.50
CY2017Q4	us-gaap	Line Of Credit Facility Current Borrowing Capacity LineOfCreditFacilityCurrentBorrowingCapacity	128000000	USD
CY2018Q4	us-gaap	Line Of Credit Facility Remaining Borrowing Capacity LineOfCreditFacilityRemainingBorrowingCapacity	8008000000	USD
CY2016	us-gaap	Litigation Settlement Amount Awarded From Other Party LitigationSettlementAmountAwardedFromOtherParty	28000000	USD
CY2018Q4	us-gaap	Long Term Debt LongTermDebt	35301000000	USD
CY2017Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	2088000000	USD
CY2018Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	1349000000	USD
CY2017Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	2088000000	USD
CY2018Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	1349000000	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	24979000000	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	1349000000	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	850000000	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	3084000000	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	1511000000	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	3528000000	USD
CY2017Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	32176000000	USD
CY2018Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	34075000000	USD
CY2017Q4	us-gaap	Long Term Investments LongTermInvestments	640000000	USD
CY2018Q4	us-gaap	Long Term Investments LongTermInvestments	625000000	USD
CY2016	us-gaap	Loss Contingency Loss In Period LossContingencyLossInPeriod	50000000	USD
CY2017Q4	us-gaap	Margin Deposit Assets MarginDepositAssets	-117000000	USD
CY2018Q4	us-gaap	Margin Deposit Assets MarginDepositAssets	-94000000	USD
CY2017Q4	us-gaap	Minority Interest MinorityInterest	2291000000	USD
CY2018Q4	us-gaap	Minority Interest MinorityInterest	2306000000	USD
CY2016	us-gaap	Minority Interest Change In Redemption Value MinorityInterestChangeInRedemptionValue	157000000	USD
CY2017	us-gaap	Minority Interest Change In Redemption Value MinorityInterestChangeInRedemptionValue	-20000000	USD
CY2016	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	5000000	USD
CY2018	us-gaap	Minority Interest Period Increase Decrease MinorityInterestPeriodIncreaseDecrease	-60000000	USD
CY2016	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	1191000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	767000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-219000000	USD
CY2016	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-15450000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-7971000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-7834000000	USD
CY2016	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	8461000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	7480000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	8644000000	USD
CY2016	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	1121000000	USD
CY2017Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	990000000	USD
CY2017Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	95000000	USD
CY2017Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	823000000	USD
CY2017Q4	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	1880000000	USD
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	3786000000	USD
CY2018Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	585000000	USD
CY2018Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	539000000	USD
CY2018Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	733000000	USD
CY2018Q4	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	152000000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	2010000000	USD
CY2016	us-gaap	Noncash Merger Related Costs NoncashMergerRelatedCosts	558000000	USD
CY2017	us-gaap	Noncash Merger Related Costs NoncashMergerRelatedCosts	0	USD
CY2018	us-gaap	Noncash Merger Related Costs NoncashMergerRelatedCosts	0	USD
CY2016	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	95000000	USD
CY2017	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	16000000	USD
CY2016	us-gaap	Noncash Or Part Noncash Divestiture Amount Of Consideration Received1 NoncashOrPartNoncashDivestitureAmountOfConsiderationReceived1	37000000	USD
CY2016	us-gaap	Noncontrolling Interest Increase From Sale Of Parent Equity Interest NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest	239000000	USD
CY2017	us-gaap	Noncontrolling Interest Increase From Sale Of Parent Equity Interest NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest	407000000	USD
CY2018	us-gaap	Noncontrolling Interest Increase From Sale Of Parent Equity Interest NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest	6000000	USD
CY2016	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-1239000000	USD
CY2017	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-613000000	USD
CY2018	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-1666000000	USD
CY2017Q4	us-gaap	Nontrade Receivables Current NontradeReceivablesCurrent	94000000	USD
CY2018Q4	us-gaap	Nontrade Receivables Current NontradeReceivablesCurrent	124000000	USD
CY2017Q4	us-gaap	Nontrade Receivables Noncurrent NontradeReceivablesNoncurrent	15000000	USD
CY2018Q4	us-gaap	Nontrade Receivables Noncurrent NontradeReceivablesNoncurrent	15000000	USD
CY2018	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	12	Reportable_segment
CY2016	us-gaap	Operating Expenses OperatingExpenses	28106000000	USD
CY2017	us-gaap	Operating Expenses OperatingExpenses	29619000000	USD
CY2018	us-gaap	Operating Expenses OperatingExpenses	32143000000	USD
CY2016	us-gaap	Operating Income Loss OperatingIncomeLoss	3212000000	USD
CY2017Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	1308000000	USD
CY2017Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	300000000	USD
CY2017Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	1499000000	USD
CY2017Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	1288000000	USD
CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	4395000000	USD
CY2018Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	1101000000	USD
CY2018Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	942000000	USD
CY2018Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	1146000000	USD
CY2018Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	708000000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	3898000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	1378000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	140000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	97000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	126000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	143000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	149000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	723000000	USD
CY2017Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	100000000	USD
CY2018Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	131000000	USD
CY2017Q4	us-gaap	Other Assets Current OtherAssetsCurrent	1260000000	USD
CY2018Q4	us-gaap	Other Assets Current OtherAssetsCurrent	1238000000	USD
CY2017Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	1330000000	USD
CY2018Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	1575000000	USD
CY2018Q4	us-gaap	Other Commitment OtherCommitment	127000000	USD
CY2016	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	10000000	USD
CY2017	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	7000000	USD
CY2018	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	-10000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Net Of Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax	-48000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Net Of Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax	-56000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Net Of Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax	-66000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	1000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	6000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	0	USD
CY2016	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-36000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	171000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	42000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	181000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-10000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	143000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-184000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-197000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-247000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	30000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-90000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-17000000	USD
CY2016	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	2000000	USD
CY2017	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	3000000	USD
CY2018	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	12000000	USD
CY2016	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	3936000000	USD
CY2017	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	3828000000	USD
CY2018	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	4353000000	USD
CY2018Q4	us-gaap	Other Investments OtherInvestments	2000000	USD
CY2016	us-gaap	Other Labor Related Expenses OtherLaborRelatedExpenses	226000000	USD
CY2017	us-gaap	Other Labor Related Expenses OtherLaborRelatedExpenses	230000000	USD
CY2018	us-gaap	Other Labor Related Expenses OtherLaborRelatedExpenses	247000000	USD
CY2017Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	1069000000	USD
CY2018Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	1035000000	USD
CY2017Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	2097000000	USD
CY2018Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	2130000000	USD
CY2017	us-gaap	Other Noncash Expense OtherNoncashExpense	-68000000	USD
CY2016	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-1333000000	USD
CY2017	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-721000000	USD
CY2018	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-1124000000	USD
CY2016	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	24000000	USD
CY2017	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	31000000	USD
CY2018	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	45000000	USD
CY2016	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	297000000	USD
CY2017	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	947000000	USD
CY2018	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-112000000	USD
CY2017Q4	us-gaap	Other Postretirement Defined Benefit Plan Liabilities Noncurrent OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent	2093000000	USD
CY2018Q4	us-gaap	Other Postretirement Defined Benefit Plan Liabilities Noncurrent OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent	1928000000	USD
CY2017Q4	us-gaap	Other Receivables OtherReceivables	1132000000	USD
CY2018Q4	us-gaap	Other Receivables OtherReceivables	1256000000	USD
CY2016	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	153000000	USD
CY2017	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	43000000	USD
CY2018	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-58000000	USD
CY2017	us-gaap	Payments For Restructuring PaymentsForRestructuring	29000000	USD
CY2016	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	1166000000	USD
CY2017	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	1236000000	USD
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	1332000000	USD
CY2016	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	6923000000	USD
CY2017	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	208000000	USD
CY2018	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	154000000	USD
CY2018	us-gaap	Payments To Acquire Land PaymentsToAcquireLand	3000000	USD
CY2016	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	9738000000	USD
CY2017	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	8113000000	USD
CY2018	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	8997000000	USD
CY2016	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	8553000000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	7584000000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	7594000000	USD
CY2016	us-gaap	Pension And Other Postretirement Benefit Contributions PensionAndOtherPostretirementBenefitContributions	397000000	USD
CY2017	us-gaap	Pension And Other Postretirement Benefit Contributions PensionAndOtherPostretirementBenefitContributions	405000000	USD
CY2018	us-gaap	Pension And Other Postretirement Benefit Contributions PensionAndOtherPostretirementBenefitContributions	383000000	USD
CY2016	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	619000000	USD
CY2017	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	643000000	USD
CY2018	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	583000000	USD
CY2016	us-gaap	Proceeds From Collection Of Other Receivables ProceedsFromCollectionOfOtherReceivables	13000000	USD
CY2016	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	USD
CY2017	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1150000000	USD
CY2018	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	USD
CY2016	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	4716000000	USD
CY2017	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	3470000000	USD
CY2018	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	3115000000	USD
CY2016Q1	us-gaap	Proceeds From Long Term Capital Lease Obligations ProceedsFromLongTermCapitalLeaseObligations	360000000	USD
CY2016	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	372000000	USD
CY2017	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	396000000	USD
CY2018	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	0	USD
CY2016	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-85000000	USD
CY2017	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-83000000	USD
CY2018	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-108000000	USD
CY2016	us-gaap	Proceeds From Repayments Of Short Term Debt Maturing In Three Months Or Less ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess	-353000000	USD
CY2016	us-gaap	Regulated Operating Revenue RegulatedOperatingRevenue	14988000000	USD
CY2017	us-gaap	Regulated Operating Revenue RegulatedOperatingRevenue	15964000000	USD
CY2018	us-gaap	Real Estate Tax Expense RealEstateTaxExpense	557000000	USD
CY2018	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Before Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax	4000000	USD
CY2017	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-144000000	USD
CY2018	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-182000000	USD
CY2017	us-gaap	Proceeds From Repayments Of Short Term Debt Maturing In Three Months Or Less ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess	-261000000	USD
CY2018	us-gaap	Proceeds From Repayments Of Short Term Debt Maturing In Three Months Or Less ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess	-338000000	USD
CY2016	us-gaap	Proceeds From Repurchase Of Redeemable Preferred Stock ProceedsFromRepurchaseOfRedeemablePreferredStock	-190000000	USD
CY2017	us-gaap	Proceeds From Repurchase Of Redeemable Preferred Stock ProceedsFromRepurchaseOfRedeemablePreferredStock	0	USD
CY2018	us-gaap	Proceeds From Repurchase Of Redeemable Preferred Stock ProceedsFromRepurchaseOfRedeemablePreferredStock	0	USD
CY2016	us-gaap	Proceeds From Sale And Collection Of Lease Receivables ProceedsFromSaleAndCollectionOfLeaseReceivables	360000000	USD
CY2017	us-gaap	Proceeds From Sale And Collection Of Lease Receivables ProceedsFromSaleAndCollectionOfLeaseReceivables	0	USD
CY2018	us-gaap	Proceeds From Sale And Collection Of Lease Receivables ProceedsFromSaleAndCollectionOfLeaseReceivables	0	USD
CY2016	us-gaap	Proceeds From Sale And Maturity Of Other Investments ProceedsFromSaleAndMaturityOfOtherInvestments	9496000000	USD
CY2017	us-gaap	Proceeds From Sale And Maturity Of Other Investments ProceedsFromSaleAndMaturityOfOtherInvestments	7845000000	USD
CY2018	us-gaap	Proceeds From Sale And Maturity Of Other Investments ProceedsFromSaleAndMaturityOfOtherInvestments	8762000000	USD
CY2016	us-gaap	Proceeds From Sale Of Property Held For Sale ProceedsFromSaleOfPropertyHeldForSale	61000000	USD
CY2017	us-gaap	Proceeds From Sale Of Property Held For Sale ProceedsFromSaleOfPropertyHeldForSale	219000000	USD
CY2018	us-gaap	Proceeds From Sale Of Property Held For Sale ProceedsFromSaleOfPropertyHeldForSale	91000000	USD
CY2016	us-gaap	Proceeds From Short Term Debt Maturing In More Than Three Months ProceedsFromShortTermDebtMaturingInMoreThanThreeMonths	240000000	USD
CY2017	us-gaap	Proceeds From Short Term Debt Maturing In More Than Three Months ProceedsFromShortTermDebtMaturingInMoreThanThreeMonths	621000000	USD
CY2018	us-gaap	Proceeds From Short Term Debt Maturing In More Than Three Months ProceedsFromShortTermDebtMaturingInMoreThanThreeMonths	126000000	USD
CY2016	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	19000000	USD
CY2017	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	107000000	USD
CY2018	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	56000000	USD
CY2016	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	55000000	USD
CY2017	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	150000000	USD
CY2018	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	105000000	USD
CY2016	us-gaap	Profit Loss ProfitLoss	1196000000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	3876000000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	2084000000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	95266000000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	99609000000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	74202000000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	76707000000	USD
CY2016	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	155000000	USD
CY2017	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	125000000	USD
CY2018	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	159000000	USD
CY2016	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	64000000	USD
CY2017	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	73000000	USD
CY2018	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	69000000	USD
CY2016	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Interest PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest	98000000	USD
CY2017	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Interest PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest	108000000	USD
CY2018	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Interest PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest	109000000	USD
CY2017Q4	us-gaap	Public Utilities Amount Of Allowance For Earnings On Equity Capitalized For Rate Making Purposes PublicUtilitiesAmountOfAllowanceForEarningsOnEquityCapitalizedForRateMakingPurposes	69000000	USD
CY2018Q4	us-gaap	Public Utilities Amount Of Allowance For Earnings On Equity Capitalized For Rate Making Purposes PublicUtilitiesAmountOfAllowanceForEarningsOnEquityCapitalizedForRateMakingPurposes	65000000	USD
CY2017Q4	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	74202000000	USD
CY2018Q4	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	76707000000	USD
CY2016	us-gaap	Real Estate Tax Expense RealEstateTaxExpense	483000000	USD
CY2017	us-gaap	Real Estate Tax Expense RealEstateTaxExpense	545000000	USD
CY2018	us-gaap	Regulated Operating Revenue RegulatedOperatingRevenue	16879000000	USD
CY2017Q4	us-gaap	Regulatory Assets RegulatoryAssets	9288000000	USD
CY2018Q4	us-gaap	Regulatory Assets RegulatoryAssets	9459000000	USD
CY2017Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	1267000000	USD
CY2018Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	1222000000	USD
CY2017Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	8021000000	USD
CY2018Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	8237000000	USD
CY2017Q4	us-gaap	Regulatory Liabilities RegulatoryLiabilities	10388000000	USD
CY2018Q4	us-gaap	Regulatory Liabilities RegulatoryLiabilities	10203000000	USD
CY2017Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	523000000	USD
CY2018Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	644000000	USD
CY2017Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	9865000000	USD
CY2018Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	9559000000	USD
CY2016	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	1936000000	USD
CY2017	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	2490000000	USD
CY2018	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	1786000000	USD
CY2016	us-gaap	Repayments Of Related Party Debt RepaymentsOfRelatedPartyDebt	0	USD
CY2017	us-gaap	Repayments Of Related Party Debt RepaymentsOfRelatedPartyDebt	250000000	USD
CY2018	us-gaap	Repayments Of Related Party Debt RepaymentsOfRelatedPartyDebt	0	USD
CY2016	us-gaap	Repayments Of Short Term Debt Maturing In More Than Three Months RepaymentsOfShortTermDebtMaturingInMoreThanThreeMonths	462000000	USD
CY2017	us-gaap	Repayments Of Short Term Debt Maturing In More Than Three Months RepaymentsOfShortTermDebtMaturingInMoreThanThreeMonths	700000000	USD
CY2018	us-gaap	Repayments Of Short Term Debt Maturing In More Than Three Months RepaymentsOfShortTermDebtMaturingInMoreThanThreeMonths	1000000	USD
CY2015Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	205000000	USD
CY2016Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	253000000	USD
CY2017Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	207000000	USD
CY2018Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	247000000	USD
CY2015Q4	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	5000000	USD
CY2016Q4	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	26000000	USD
CY2017Q4	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	85000000	USD
CY2018Q4	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	185000000	USD
CY2016	us-gaap	Restructuring Costs RestructuringCosts	99000000	USD
CY2017	us-gaap	Restructuring Costs RestructuringCosts	35000000	USD
CY2018	us-gaap	Restructuring Costs RestructuringCosts	35000000	USD
CY2016Q4	us-gaap	Restructuring Reserve RestructuringReserve	88000000	USD
CY2017Q4	us-gaap	Restructuring Reserve RestructuringReserve	94000000	USD
CY2018Q4	us-gaap	Restructuring Reserve RestructuringReserve	77000000	USD
CY2017Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	14081000000	USD
CY2018Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	14766000000	USD
CY2016	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	48000000	USD
CY2017	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	207000000	USD
CY2018	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	-62000000	USD
CY2016	us-gaap	Revenue From Related Parties RevenueFromRelatedParties	0	USD
CY2017	us-gaap	Revenue From Related Parties RevenueFromRelatedParties	0	USD
CY2018Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	631000000	USD
CY2018Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	329000000	USD
CY2018Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	119000000	USD
CY2018Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	47000000	USD
CY2018Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	138000000	USD
CY2018Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	1264000000	USD
CY2016	us-gaap	Revenues Revenues	31366000000	USD
CY2017Q1	us-gaap	Revenues Revenues	8747000000	USD
CY2018Q4	us-gaap	Variable Interest Entity Nonconsolidated Carrying Amount Assets VariableInterestEntityNonconsolidatedCarryingAmountAssets	1069000000	USD
CY2018	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	105000000	USD
CY2017	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	0	USD
CY2016	us-gaap	Stock Issued During Period Value Share Based Compensation Gross StockIssuedDuringPeriodValueShareBasedCompensationGross	85000000	USD
CY2017	us-gaap	Stock Issued During Period Value Share Based Compensation Gross StockIssuedDuringPeriodValueShareBasedCompensationGross	56000000	USD
CY2017Q2	us-gaap	Revenues Revenues	7665000000	USD
CY2017Q3	us-gaap	Revenues Revenues	8768000000	USD
CY2017Q4	us-gaap	Revenues Revenues	8384000000	USD
CY2017	us-gaap	Revenues Revenues	33565000000	USD
CY2018Q1	us-gaap	Revenues Revenues	9693000000	USD
CY2018Q2	us-gaap	Revenues Revenues	8076000000	USD
CY2018Q3	us-gaap	Revenues Revenues	9403000000	USD
CY2018Q4	us-gaap	Revenues Revenues	8814000000	USD
CY2018	us-gaap	Revenues Revenues	35985000000	USD
CY2015Q3	us-gaap	Sale Of Stock Price Per Share SaleOfStockPricePerShare	32.48
CY2016	us-gaap	Share Based Compensation ShareBasedCompensation	111000000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	88000000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	75000000	USD
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	11000000	USD
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	15000000	USD
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	12000000	USD
CY2015Q4	us-gaap	Shares Issued SharesIssued	954668000	shares
CY2016Q4	us-gaap	Shares Issued SharesIssued	958778000	shares
CY2017Q4	us-gaap	Shares Issued SharesIssued	965168000	shares
CY2018Q4	us-gaap	Shares Issued SharesIssued	970020000	shares
CY2017Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	929000000	USD
CY2018Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	714000000	USD
CY2016Q4	us-gaap	Short Term Debt Weighted Average Interest Rate ShortTermDebtWeightedAverageInterestRate	0.0112
CY2017Q4	us-gaap	Short Term Debt Weighted Average Interest Rate ShortTermDebtWeightedAverageInterestRate	0.0124
CY2018Q4	us-gaap	Short Term Debt Weighted Average Interest Rate ShortTermDebtWeightedAverageInterestRate	0.0215
CY2016	us-gaap	Short Term Debt Weighted Average Interest Rate Over Time ShortTermDebtWeightedAverageInterestRateOverTime	0.0088
CY2017	us-gaap	Short Term Debt Weighted Average Interest Rate Over Time ShortTermDebtWeightedAverageInterestRateOverTime	0.0132
CY2018	us-gaap	Short Term Debt Weighted Average Interest Rate Over Time ShortTermDebtWeightedAverageInterestRateOverTime	0.0221
CY2016	us-gaap	Shortterm Debt Average Outstanding Amount ShorttermDebtAverageOutstandingAmount	1125000000	USD
CY2017	us-gaap	Shortterm Debt Average Outstanding Amount ShorttermDebtAverageOutstandingAmount	823000000	USD
CY2018	us-gaap	Shortterm Debt Average Outstanding Amount ShorttermDebtAverageOutstandingAmount	531000000	USD
CY2016	us-gaap	Shortterm Debt Maximum Amount Outstanding During Period ShorttermDebtMaximumAmountOutstandingDuringPeriod	3076000000	USD
CY2017	us-gaap	Shortterm Debt Maximum Amount Outstanding During Period ShorttermDebtMaximumAmountOutstandingDuringPeriod	2147000000	USD
CY2018	us-gaap	Shortterm Debt Maximum Amount Outstanding During Period ShorttermDebtMaximumAmountOutstandingDuringPeriod	1237000000	USD
CY2017Q4	us-gaap	Spent Nuclear Fuel Obligation Noncurrent SpentNuclearFuelObligationNoncurrent	1147000000	USD
CY2018Q4	us-gaap	Spent Nuclear Fuel Obligation Noncurrent SpentNuclearFuelObligationNoncurrent	1171000000	USD
CY2016	us-gaap	Stock Issued During Period Shares Employee Stock Purchase Plans StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	1242000	shares
CY2017	us-gaap	Stock Issued During Period Shares Employee Stock Purchase Plans StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	1324000	shares
CY2018	us-gaap	Stock Issued During Period Shares Employee Stock Purchase Plans StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	1318000	shares
CY2017	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	0	shares
CY2016	us-gaap	Stock Issued During Period Shares Share Based Compensation Gross StockIssuedDuringPeriodSharesShareBasedCompensationGross	2868000	shares
CY2017	us-gaap	Stock Issued During Period Shares Share Based Compensation Gross StockIssuedDuringPeriodSharesShareBasedCompensationGross	5066000	shares
CY2018	us-gaap	Stock Issued During Period Shares Share Based Compensation Gross StockIssuedDuringPeriodSharesShareBasedCompensationGross	3534000	shares
CY2016	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	55000000	USD
CY2017	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	150000000	USD
CY2018	us-gaap	Stock Issued During Period Value Share Based Compensation Gross StockIssuedDuringPeriodValueShareBasedCompensationGross	41000000	USD
CY2017	us-gaap	Stock Issued During Period Value Treasury Stock Reissued StockIssuedDuringPeriodValueTreasuryStockReissued	-1150000000	USD
CY2016	us-gaap	Stock Redeemed Or Called During Period Value StockRedeemedOrCalledDuringPeriodValue	-193000000	USD
CY2016	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	0	shares
CY2017	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	33000000	shares
CY2016	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	0	USD
CY2018	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	0	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	29896000000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	30764000000	USD
CY2015Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	27330000000	USD
CY2016Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	27640000000	USD
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	32187000000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	33070000000	USD
CY2018	us-gaap	Subsidiary Or Equity Method Investee Cumulative Percentage Ownership After All Transactions SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions	1.00
CY2018	us-gaap	Subsidiary Or Equity Method Investee Cumulative Percentage Ownership After All Transactions SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions	1
CY2016Q2	us-gaap	Tangible Asset Impairment Charges TangibleAssetImpairmentCharges	36000000	USD
CY2016	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	1576000000	USD
CY2017	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	1731000000	USD
CY2018	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	1783000000	USD
CY2016	us-gaap	Taxes Other TaxesOther	114000000	USD
CY2017	us-gaap	Taxes Other TaxesOther	58000000	USD
CY2018	us-gaap	Taxes Other TaxesOther	60000000	USD
CY2017Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	373000000	USD
CY2018Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	412000000	USD
CY2014Q2	us-gaap	Temporary Equity Share Subscriptions TemporaryEquityShareSubscriptions	57500000	shares
CY2015Q3	us-gaap	Temporary Equity Share Subscriptions TemporaryEquityShareSubscriptions	57500000	shares
CY2017Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	2000000	shares
CY2017Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	2000000	shares
CY2018Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	2000000	shares
CY2017Q4	us-gaap	Treasury Stock Value TreasuryStockValue	123000000	USD
CY2018Q4	us-gaap	Treasury Stock Value TreasuryStockValue	123000000	USD
CY2017Q4	us-gaap	Unamortized Debt Issuance Expense UnamortizedDebtIssuanceExpense	-201000000	USD
CY2018Q4	us-gaap	Unamortized Debt Issuance Expense UnamortizedDebtIssuanceExpense	-216000000	USD
CY2017Q4	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	1858000000	USD
CY2018Q4	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	1656000000	USD
CY2016	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-24000000	USD
CY2017	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-151000000	USD
CY2018	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-294000000	USD
CY2015Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1078000000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	916000000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	743000000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	477000000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	-88000000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	-28000000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	-30000000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	-27000000	USD
CY2018Q4	us-gaap	Variable Interest Entity Nonconsolidated Carrying Amount Assets And Liabilities Net VariableInterestEntityNonconsolidatedCarryingAmountAssetsAndLiabilitiesNet	15000000	USD
CY2017Q4	us-gaap	Variable Interest Entity Nonconsolidated Carrying Amount Liabilities VariableInterestEntityNonconsolidatedCarryingAmountLiabilities	265000000	USD
CY2018Q4	us-gaap	Variable Interest Entity Nonconsolidated Carrying Amount Liabilities VariableInterestEntityNonconsolidatedCarryingAmountLiabilities	259000000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	-5000000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	-53000000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued	-17000000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued	-17000000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Income Tax Penalties Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesExpense	106000000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Income Tax Penalties Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesExpense	-2000000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Income Tax Penalties Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesExpense	0	USD
CY2016	us-gaap	Unrecognized Tax Benefits Increases Resulting From Acquisition UnrecognizedTaxBenefitsIncreasesResultingFromAcquisition	22000000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	108000000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	-332000000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	15000000	USD
CY2018Q3	us-gaap	Unrecognized Tax Benefits Increases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsIncreasesResultingFromSettlementsWithTaxingAuthorities	9000000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Period Increase Decrease UnrecognizedTaxBenefitsPeriodIncreaseDecrease	-21000000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Period Increase Decrease UnrecognizedTaxBenefitsPeriodIncreaseDecrease	-196000000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Period Increase Decrease UnrecognizedTaxBenefitsPeriodIncreaseDecrease	-251000000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	-7000000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	633000000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	523000000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	463000000	USD
CY2018Q3	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	20000000	USD
CY2016	us-gaap	Utilities Operating Expense Maintenance Operations And Other Costs And Expenses UtilitiesOperatingExpenseMaintenanceOperationsAndOtherCostsAndExpenses	9954000000	USD
CY2017	us-gaap	Utilities Operating Expense Maintenance Operations And Other Costs And Expenses UtilitiesOperatingExpenseMaintenanceOperationsAndOtherCostsAndExpenses	10025000000	USD
CY2018	us-gaap	Utilities Operating Expense Maintenance Operations And Other Costs And Expenses UtilitiesOperatingExpenseMaintenanceOperationsAndOtherCostsAndExpenses	9337000000	USD
CY2016	us-gaap	Utilities Operating Expense Taxes UtilitiesOperatingExpenseTaxes	753000000	USD
CY2017	us-gaap	Utilities Operating Expense Taxes UtilitiesOperatingExpenseTaxes	898000000	USD
CY2018	us-gaap	Utilities Operating Expense Taxes UtilitiesOperatingExpenseTaxes	919000000	USD
CY2017Q4	us-gaap	Variable Interest Entity Consolidated Assets Current VariableInterestEntityConsolidatedAssetsCurrent	662000000	USD
CY2018Q4	us-gaap	Variable Interest Entity Consolidated Assets Current VariableInterestEntityConsolidatedAssetsCurrent	938000000	USD
CY2017Q4	us-gaap	Variable Interest Entity Consolidated Assets Noncurrent VariableInterestEntityConsolidatedAssetsNoncurrent	9317000000	USD
CY2018Q4	us-gaap	Variable Interest Entity Consolidated Assets Noncurrent VariableInterestEntityConsolidatedAssetsNoncurrent	9071000000	USD
CY2017Q4	us-gaap	Variable Interest Entity Consolidated Assets Not Pledged VariableInterestEntityConsolidatedAssetsNotPledged	9597000000	USD
CY2018Q4	us-gaap	Variable Interest Entity Consolidated Assets Not Pledged VariableInterestEntityConsolidatedAssetsNotPledged	9667000000	USD
CY2017Q4	us-gaap	Variable Interest Entity Consolidated Carrying Amount Assets VariableInterestEntityConsolidatedCarryingAmountAssets	9979000000	USD
CY2018Q4	us-gaap	Variable Interest Entity Consolidated Carrying Amount Assets VariableInterestEntityConsolidatedCarryingAmountAssets	10009000000	USD
CY2017Q4	us-gaap	Variable Interest Entity Consolidated Carrying Amount Liabilities VariableInterestEntityConsolidatedCarryingAmountLiabilities	3624000000	USD
CY2018Q4	us-gaap	Variable Interest Entity Consolidated Carrying Amount Liabilities VariableInterestEntityConsolidatedCarryingAmountLiabilities	3554000000	USD
CY2017Q4	us-gaap	Variable Interest Entity Consolidated Liabilities Current VariableInterestEntityConsolidatedLiabilitiesCurrent	308000000	USD
CY2018Q4	us-gaap	Variable Interest Entity Consolidated Liabilities Current VariableInterestEntityConsolidatedLiabilitiesCurrent	274000000	USD
CY2017Q4	us-gaap	Variable Interest Entity Consolidated Liabilities No Recourse VariableInterestEntityConsolidatedLiabilitiesNoRecourse	3618000000	USD
CY2018Q4	us-gaap	Variable Interest Entity Consolidated Liabilities No Recourse VariableInterestEntityConsolidatedLiabilitiesNoRecourse	3548000000	USD
CY2017Q4	us-gaap	Variable Interest Entity Consolidated Liabilities Noncurrent VariableInterestEntityConsolidatedLiabilitiesNoncurrent	3316000000	USD
CY2018Q4	us-gaap	Variable Interest Entity Consolidated Liabilities Noncurrent VariableInterestEntityConsolidatedLiabilitiesNoncurrent	3280000000	USD
CY2018Q4	us-gaap	Variable Interest Entity Entity Maximum Loss Exposure Amount VariableInterestEntityEntityMaximumLossExposureAmount	15000000	USD
CY2017Q4	us-gaap	Variable Interest Entity Nonconsolidated Carrying Amount Assets VariableInterestEntityNonconsolidatedCarryingAmountAssets	1134000000	USD
CY2016	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	927000000	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	949000000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	969000000	shares
CY2016	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	924000000	shares
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	947000000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	967000000	shares
CY2018	exc	Scheduleofjointlyownedelectricutilityplanttextblock Scheduleofjointlyownedelectricutilityplanttextblock	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-bottom:12px;padding-top:12px;text-align:justify;padding-left:0px;text-indent:0px;font-size:9pt;"><font style="font-family:Arial;font-size:9pt;font-weight:bold;">Jointly Owned Electric Utility Plant</font><font style="font-family:Arial;font-size:9pt;font-weight:bold;"> (Exelon, Generation, PECO, BGE, PHI, Pepco, DPL and ACE)</font></div><div style="line-height:120%;padding-bottom:12px;padding-top:12px;text-align:justify;font-size:9pt;"><font style="font-family:Arial;font-size:9pt;">Exelon's, Generation's, PECO's, BGE's, Pepco's, DPL's and ACE's undivided ownership interests in jointly owned electric plants and transmission facilities at </font><font style="font-family:Arial;font-size:9pt;">December 31, 2018</font><font style="font-family:Arial;font-size:9pt;"> and </font><font style="font-family:Arial;font-size:9pt;">2017</font><font style="font-family:Arial;font-size:9pt;"> were as follows:</font></div><div style="line-height:120%;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="32" rowspan="1"></td></tr><tr><td style="width:22%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:8%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:7%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:6%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:9%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:8%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:5%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:7%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:5%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="15" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:center;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;font-weight:bold;">Nuclear Generation</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;font-weight:bold;">Fossil-Fuel Generation</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="7" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:center;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;font-weight:bold;">Transmission</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;font-weight:bold;">Other</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;font-weight:bold;">Quad Cities</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;font-weight:bold;">Peach</font></div><div style="text-align:center;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;font-weight:bold;">Bottom</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;font-weight:bold;">Salem</font><font style="font-family:Arial;font-size:7pt;font-weight:bold;"><sup style="vertical-align:top;line-height:120%;font-size:5pt">(a)</sup></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;font-weight:bold;">Nine Mile Point Unit 2</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;font-weight:bold;">Wyman</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;font-weight:bold;">PA</font><font style="font-family:Arial;font-size:7pt;font-weight:bold;"><sup style="vertical-align:top;line-height:120%;font-size:5pt">(b)</sup></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;font-weight:bold;">NJ/ DE</font><font style="font-family:Arial;font-size:7pt;font-weight:bold;"><sup style="vertical-align:top;line-height:120%;font-size:5pt">(c)</sup></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;font-weight:bold;">Other</font><font style="font-family:Arial;font-size:7pt;font-weight:bold;"><sup style="vertical-align:top;line-height:120%;font-size:5pt">(d)</sup></font></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">Operator</font></div></td><td colspan="3" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">Generation</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">Generation</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">PSEG<br clear="none"/>Nuclear</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">Generation</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">FP&L</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">First<br clear="none"/>Energy</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">PSEG/ DPL</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">various</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">Ownership interest</font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">75.00</font></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">%</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">50.00</font></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">%</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">42.59</font></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">%</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">82.00</font></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">%</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">5.89</font></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">%</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">various</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">various</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">various</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;font-weight:bold;">Exelon’s share at December 31, 2018:</font></div></td><td colspan="3" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">Plant</font><font style="font-family:Arial;font-size:7pt;"><sup style="vertical-align:top;line-height:120%;font-size:5pt">(e)</sup></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">$</font></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">1,131</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">$</font></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">1,451</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">$</font></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">648</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">$</font></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">910</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">$</font></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">4</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">$</font></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">28</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">$</font></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">103</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">$</font></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">15</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">Accumulated depreciation</font><font style="font-family:Arial;font-size:7pt;"><sup style="vertical-align:top;line-height:120%;font-size:5pt">(e)</sup></font></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">587</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">523</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">227</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">126</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">3</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">16</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">53</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">13</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">Construction work in progress</font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">13</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">15</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">44</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">56</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">—</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">1</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">—</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">—</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;font-weight:bold;">Exelon’s share at December 31, 2017:</font></div></td><td colspan="3" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">Plant</font><font style="font-family:Arial;font-size:7pt;"><sup style="vertical-align:top;line-height:120%;font-size:5pt">(e)</sup></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">$</font></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">1,074</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">$</font></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">1,417</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">$</font></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">631</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">$</font></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">839</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">$</font></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">3</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">$</font></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">27</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">$</font></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">102</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">$</font></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">15</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">Accumulated depreciation</font><font style="font-family:Arial;font-size:7pt;"><sup style="vertical-align:top;line-height:120%;font-size:5pt">(e)</sup></font></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">550</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">461</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">205</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">97</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">3</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">15</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">52</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">13</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">Construction work in progress</font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">35</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">18</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">33</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">55</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">—</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">—</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">—</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">—</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr></table></div></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">__________</font></div><table cellpadding="0" cellspacing="0" style="padding-top:0px;padding-bottom:0px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:24px;" rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:top" rowspan="1" colspan="1"><div style="line-height:120%;font-size:8pt;padding-left:0px;"><font style="font-family:Arial;font-size:8pt;">(a)</font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;text-align:justify;font-size:8pt;"><font style="font-family:Arial;font-size:8pt;">Generation also owns a proportionate share in the fossil-fuel combustion turbine at Salem, which is fully depreciated. The gross book value was </font><font style="font-family:Arial;font-size:8pt;">$3 million</font><font style="font-family:Arial;font-size:8pt;"> at </font><font style="font-family:Arial;font-size:8pt;">December 31, 2018</font><font style="font-family:Arial;font-size:8pt;"> and </font><font style="font-family:Arial;font-size:8pt;">2017</font><font style="font-family:Arial;font-size:8pt;">.</font></div></td></tr></table><table cellpadding="0" cellspacing="0" style="padding-top:0px;padding-bottom:0px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:24px;" rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:top" rowspan="1" colspan="1"><div style="line-height:120%;font-size:8pt;padding-left:0px;"><font style="font-family:Arial;font-size:8pt;">(b)</font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;text-align:justify;font-size:8pt;"><font style="font-family:Arial;font-size:8pt;">PECO, BGE, Pepco, DPL and ACE own a </font><font style="font-family:Arial;font-size:8pt;">22%</font><font style="font-family:Arial;font-size:8pt;">, </font><font style="font-family:Arial;font-size:8pt;">7%</font><font style="font-family:Arial;font-size:8pt;">, </font><font style="font-family:Arial;font-size:8pt;">27%</font><font style="font-family:Arial;font-size:8pt;">, </font><font style="font-family:Arial;font-size:8pt;">9%</font><font style="font-family:Arial;font-size:8pt;"> and </font><font style="font-family:Arial;font-size:8pt;">8%</font><font style="font-family:Arial;font-size:8pt;"> share, respectively, in </font><font style="font-family:Arial;font-size:8pt;">127</font><font style="font-family:Arial;font-size:8pt;"> miles of </font><font style="font-family:Arial;font-size:8pt;">500</font><font style="font-family:Arial;font-size:8pt;">kV lines located in Pennsylvania as well as a </font><font style="font-family:Arial;font-size:8pt;">20.72%</font><font style="font-family:Arial;font-size:8pt;">, </font><font style="font-family:Arial;font-size:8pt;">10.56%</font><font style="font-family:Arial;font-size:8pt;">, </font><font style="font-family:Arial;font-size:8pt;">9.72%</font><font style="font-family:Arial;font-size:8pt;">, </font><font style="font-family:Arial;font-size:8pt;">3.72%</font><font style="font-family:Arial;font-size:8pt;"> and </font><font style="font-family:Arial;font-size:8pt;">3.83%</font><font style="font-family:Arial;font-size:8pt;"> share, respectively, of a </font><font style="font-family:Arial;font-size:8pt;">500</font><font style="font-family:Arial;font-size:8pt;">kV substation immediately outside of the Conemaugh fossil-generating station which supplies power to the </font><font style="font-family:Arial;font-size:8pt;">500</font><font style="font-family:Arial;font-size:8pt;">kV lines including, but not limited to, the lines noted above.</font></div></td></tr></table><table cellpadding="0" cellspacing="0" style="padding-top:0px;padding-bottom:0px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:24px;" rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:top" rowspan="1" colspan="1"><div style="line-height:120%;font-size:8pt;padding-left:0px;"><font style="font-family:Arial;font-size:8pt;">(c)</font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;text-align:justify;font-size:8pt;"><font style="font-family:Arial;font-size:8pt;">PECO, DPL and ACE own a </font><font style="font-family:Arial;font-size:8pt;">42.55%</font><font style="font-family:Arial;font-size:8pt;">, </font><font style="font-family:Arial;font-size:8pt;">1%</font><font style="font-family:Arial;font-size:8pt;"> and </font><font style="font-family:Arial;font-size:8pt;">13.9%</font><font style="font-family:Arial;font-size:8pt;"> share, respectively in </font><font style="font-family:Arial;font-size:8pt;">151.3</font><font style="font-family:Arial;font-size:8pt;"> miles of </font><font style="font-family:Arial;font-size:8pt;">500</font><font style="font-family:Arial;font-size:8pt;">kV lines located in New Jersey and of the Salem generating plant substation. PECO, DPL and ACE also own a </font><font style="font-family:Arial;font-size:8pt;">42.55%</font><font style="font-family:Arial;font-size:8pt;">, </font><font style="font-family:Arial;font-size:8pt;">7.45%</font><font style="font-family:Arial;font-size:8pt;"> and </font><font style="font-family:Arial;font-size:8pt;">7.45%</font><font style="font-family:Arial;font-size:8pt;"> share, respectively, in </font><font style="font-family:Arial;font-size:8pt;">2.5</font><font style="font-family:Arial;font-size:8pt;"> miles of </font><font style="font-family:Arial;font-size:8pt;">500</font><font style="font-family:Arial;font-size:8pt;">kV line located over the Delaware River. ACE also has a </font><font style="font-family:Arial;font-size:8pt;">21.78%</font><font style="font-family:Arial;font-size:8pt;"> share in a </font><font style="font-family:Arial;font-size:8pt;">500</font><font style="font-family:Arial;font-size:8pt;">kV New Freedom Switching substation.</font></div></td></tr></table><table cellpadding="0" cellspacing="0" style="padding-top:0px;padding-bottom:0px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:24px;" rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:top" rowspan="1" colspan="1"><div style="line-height:120%;font-size:8pt;padding-left:0px;"><font style="font-family:Arial;font-size:8pt;">(d)</font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;text-align:justify;font-size:8pt;"><font style="font-family:Arial;font-size:8pt;">Generation, DPL and ACE own a </font><font style="font-family:Arial;font-size:8pt;">44.24%</font><font style="font-family:Arial;font-size:8pt;">, </font><font style="font-family:Arial;font-size:8pt;">11.91%</font><font style="font-family:Arial;font-size:8pt;"> and </font><font style="font-family:Arial;font-size:8pt;">4.83%</font><font style="font-family:Arial;font-size:8pt;"> share, respectively in assets located at Merrill Creek Reservoir located in New Jersey. Pepco, DPL and ACE own a </font><font style="font-family:Arial;font-size:8pt;">11.9%</font><font style="font-family:Arial;font-size:8pt;">, </font><font style="font-family:Arial;font-size:8pt;">7.4%</font><font style="font-family:Arial;font-size:8pt;"> and </font><font style="font-family:Arial;font-size:8pt;">6.6%</font><font style="font-family:Arial;font-size:8pt;"> share, respectively, in Valley Forge Corporate Center.</font></div></td></tr></table><table cellpadding="0" cellspacing="0" style="padding-top:0px;padding-bottom:0px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:24px;" rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:top" rowspan="1" colspan="1"><div style="line-height:120%;font-size:8pt;padding-left:0px;"><font style="font-family:Arial;font-size:8pt;">(e)</font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;text-align:justify;font-size:8pt;"><font style="font-family:Arial;font-size:8pt;">Excludes asset retirement costs and general plant.</font></div></td></tr></table><div style="line-height:120%;padding-bottom:12px;padding-top:12px;text-align:justify;font-size:9pt;"><font style="font-family:Arial;font-size:9pt;">Exelon’s, Generation’s, PECO's, BGE's, Pepco's, DPL's and ACE's undivided ownership interests are financed with their funds and all operations are accounted for as if such participating interests were wholly owned facilities. Exelon’s, Generation’s, PECO's, BGE's, Pepco's, DPL's and ACE's share of direct expenses of the jointly owned plants are included in Purchased power and fuel and Operating and maintenance expenses in Exelon’s and Generation’s Consolidated Statements of Operations and Comprehensive Income and in Operating and maintenance expenses in PECO's, BGE's, Pepco's, DPL's and ACE's Consolidated Statements of Operations and Comprehensive Income.</font></div></div>
CY2018	us-gaap	Guarantees Indemnifications And Warranties Policies GuaranteesIndemnificationsAndWarrantiesPolicies	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-bottom:12px;padding-top:12px;text-align:justify;padding-left:0px;text-indent:0px;font-size:9pt;"><font style="font-family:Arial;font-size:9pt;font-weight:bold;">Guarantees (All Registrants)</font></div><div style="line-height:120%;padding-bottom:12px;padding-top:12px;text-align:justify;font-size:9pt;"><font style="font-family:Arial;font-size:9pt;">The Registrants recognize, at the inception of a guarantee, a liability for the fair market value of the obligations they have undertaken by issuing the guarantee, including the ongoing obligation to perform over the term of the guarantee in the event that the specified triggering events or conditions occur.</font></div><div style="line-height:120%;padding-bottom:12px;padding-top:12px;text-align:justify;font-size:9pt;"><font style="font-family:Arial;font-size:9pt;">The liability that is initially recognized at the inception of the guarantee is reduced as the Registrants are released from risk under the guarantee. Depending on the nature of the guarantee, the release from risk of the Registrant may be recognized only upon the expiration or settlement of the guarantee or by a systematic and rational amortization method over the term of the guarantee. </font></div></div>
CY2018	us-gaap	Reclassifications Reclassifications	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-bottom:12px;padding-top:12px;text-align:justify;padding-left:0px;text-indent:0px;font-size:9pt;"><font style="font-family:Arial;font-size:9pt;font-weight:bold;">Prior Period Adjustments and Reclassifications (All Registrants)</font></div><div style="line-height:120%;padding-bottom:12px;padding-top:12px;text-align:justify;font-size:9pt;"><font style="font-family:Arial;font-size:9pt;">Certain prior year amounts in the Registrants' Consolidated Statements of Operations and Comprehensive Incom</font><font style="font-family:Arial;font-size:9pt;">e, Consolidated Statements of Cash Flows, Consolidated Balance Sheets and Consolidated Statements of Changes in Shareholders' Equity have been recasted to reflect new accounting standards issued by the FASB and adopted as of January 1, 2018. See New Accounting Standards below for additional information.</font></div></div>
CY2018	us-gaap	Use Of Estimates UseOfEstimates	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-bottom:12px;padding-top:12px;text-align:justify;padding-left:0px;text-indent:0px;font-size:9pt;"><font style="font-family:Arial;font-size:9pt;font-weight:bold;">Use of Estimates (All Registrants)</font></div><div style="line-height:120%;padding-bottom:12px;padding-top:12px;text-align:justify;font-size:9pt;"><font style="font-family:Arial;font-size:9pt;">The preparation of financial statements of each of the Registrants in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Areas in which significant estimates have been made include, but are not limited to, the accounting for nuclear decommissioning costs and other AROs, pension and other postretirement benefits, the application of purchase accounting, inventory reserves, allowance for uncollectible accounts, goodwill and asset impairments, derivative instruments, unamortized energy contracts, fixed asset depreciation, environmental costs and other loss contingencies, taxes and unbilled energy revenues. Actual results could differ from those estimates.</font></div></div>

Files In Submission

Name	View Source	Status
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0001628280-19-001107-index.html	Edgar Link	pending
0001628280-19-001107.txt	Edgar Link	pending
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exc-20181231_cal.xml	Edgar Link	unprocessable
exc-20181231_def.xml	Edgar Link	unprocessable
exc-20181231_lab.xml	Edgar Link	unprocessable
exc-20181231_pre.xml	Edgar Link	unprocessable
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
R1.htm	Edgar Link	pending
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$EXC
EXELON CORP Stock $exc

2018 Q4 Form 10-K Financial Statement

#000162828019001107 Filed on February 08, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$EXC EXELON CORP Stock $exc

2018 Q4 Form 10-K Financial Statement

#000162828019001107 Filed on February 08, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$EXC
EXELON CORP Stock $exc