$EXC
EXELON CORP Stock $exc

$exc Overview Financials Valuation SEC Filings Company Website

2018 Q2 Form 10-Q Financial Statement

#000162828018010287 Filed on August 02, 2018

Income Statement

Concept	2018 Q2	2017 Q2
Revenue	$8.074B	$7.665B
YoY Change	5.34%	10.93%
Cost Of Revenue	$3.026B	$2.803B
YoY Change	7.96%	14.22%
Gross Profit	$5.050B	$4.862B
YoY Change	3.87%	9.11%
Gross Profit Margin	62.55%	63.43%
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$1.088B	$1.317B
YoY Change	-17.39%	-1.2%
% of Gross Profit	21.54%	27.09%
Operating Expenses	$7.138B	$4.563B
YoY Change	56.43%	18.83%
Operating Profit	$940.0M	$300.0M
YoY Change	213.33%	-53.63%
Interest Expense	$367.0M	$426.0M
YoY Change	-13.85%	16.39%
% of Operating Profit	39.04%	142.0%
Other Income/Expense, Net	-$329.0M	-$259.0M
YoY Change	27.03%	11.64%
Pretax Income	$613.0M	$41.00M
YoY Change	1395.12%	-90.12%
Income Tax	$66.00M	-$62.00M
% Of Pretax Income	10.77%	-151.22%
Net Earnings	$542.0M	$94.00M
YoY Change	476.6%	-69.28%
Net Earnings / Revenue	6.71%	1.23%
Basic Earnings Per Share	$0.56	$0.10
Diluted Earnings Per Share	$0.55	$0.10
COMMON SHARES
Basic Shares Outstanding	967.0M shares	934.0M shares
Diluted Shares Outstanding	969.0M shares	936.0M shares

Balance Sheet

Concept	2018 Q2	2017 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$694.0M	$1.786B
YoY Change	-61.14%	8.44%
Cash & Equivalents	$694.0M	$536.0M
Short-Term Investments		$1.250B
Other Short-Term Assets	$1.360B	$1.600B
YoY Change	-15.0%	45.32%
Inventory	$1.590B	$1.601B
Prepaid Expenses
Receivables	$4.094B	$3.825B
Other Receivables	$1.407B	$958.0M
Total Short-Term Assets	$11.49B	$12.23B
YoY Change	-6.07%	6.41%
LONG-TERM ASSETS
Property, Plant & Equipment	$75.28B	$72.75B
YoY Change	3.49%	2.91%
Goodwill	$6.677B	$6.677B
YoY Change	0.0%	-0.28%
Intangibles
YoY Change
Long-Term Investments	$636.0M	$638.0M
YoY Change	-0.31%	27.09%
Other Assets	$1.194B	$1.265B
YoY Change	-5.61%	-7.39%
Total Long-Term Assets	$105.8B	$104.9B
YoY Change	0.85%	3.54%
TOTAL ASSETS
Total Short-Term Assets	$11.49B	$12.23B
Total Long-Term Assets	$105.8B	$104.9B
Total Assets	$117.2B	$117.1B
YoY Change	0.12%	3.84%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$3.113B	$3.134B
YoY Change	-0.67%	10.9%
Accrued Expenses	$1.665B	$2.878B
YoY Change	-42.15%	4.39%
Deferred Revenue	$28.00M
YoY Change
Short-Term Debt	$1.252B	$1.757B
YoY Change	-28.74%	84.75%
Long-Term Debt Due	$1.158B	$3.619B
YoY Change	-68.0%	34.39%
Total Short-Term Liabilities	$9.626B	$13.97B
YoY Change	-31.07%	17.41%
LONG-TERM LIABILITIES
Long-Term Debt	$33.18B	$30.32B
YoY Change	9.45%	-3.89%
Other Long-Term Liabilities	$2.087B	$1.828B
YoY Change	14.17%	-2.56%
Total Long-Term Liabilities	$35.27B	$32.14B
YoY Change	9.72%	-3.81%
TOTAL LIABILITIES
Total Short-Term Liabilities	$9.626B	$13.97B
Total Long-Term Liabilities	$35.27B	$32.14B
Total Liabilities	$84.41B	$87.81B
YoY Change	-3.88%	2.76%
SHAREHOLDERS EQUITY
Retained Earnings	$14.55B	$11.44B
YoY Change	27.17%	-4.06%
Common Stock	$19.01B	$18.86B
YoY Change	0.78%	0.74%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$123.0M	$2.300B
YoY Change	-94.65%	15.0%
Treasury Stock Shares	1.832M shares	2.000M shares
Shareholders Equity	$30.52B	$27.55B
YoY Change
Total Liabilities & Shareholders Equity	$117.2B	$117.1B
YoY Change	0.12%	3.84%

Cashflow Statement

Concept	2018 Q2	2017 Q2
OPERATING ACTIVITIES
Net Income	$542.0M	$94.00M
YoY Change	476.6%	-69.28%
Depreciation, Depletion And Amortization	$1.088B	$1.317B
YoY Change	-17.39%	-1.2%
Cash From Operating Activities	$2.367B	$1.821B
YoY Change	29.98%	-40.88%
INVESTING ACTIVITIES
Capital Expenditures	$1.927B	-$1.836B
YoY Change	-204.96%	-19.72%
Acquisitions
YoY Change
Other Investing Activities	-$62.00M	$138.0M
YoY Change	-144.93%	-428.57%
Cash From Investing Activities	-$1.989B	-$1.698B
YoY Change	17.14%	-27.09%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-449.0M	-201.0M
YoY Change	123.38%	214.06%
NET CHANGE
Cash From Operating Activities	2.367B	1.821B
Cash From Investing Activities	-1.989B	-1.698B
Cash From Financing Activities	-449.0M	-201.0M
Net Change In Cash	-71.00M	-78.00M
YoY Change	-8.97%	-111.35%
FREE CASH FLOW
Cash From Operating Activities	$2.367B	$1.821B
Capital Expenditures	$1.927B	-$1.836B
Free Cash Flow	$440.0M	$3.657B
YoY Change	-87.97%	-31.86%

Facts In Submission

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	dei	Document Type DocumentType	10-Q
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CY2018Q2	exc	Forward Gas Basis ForwardGasBasis	0.47	USD
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	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2018Q2	exc	Forward Power Basis ForwardPowerBasis	3.17	USD
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	dei	Entity Registrant Name EntityRegistrantName	EXELON CORP
	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
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	exc	Allowable Expensing For Cost Of Qualified Property AllowableExpensingForCostOfQualifiedProperty	0.30
	exc	Amortization Of Debt Fair Value Adjustment AmortizationOfDebtFairValueAdjustment	-9000000	USD
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	exc	Amortization Of Regulatory Asset Debt Costs AmortizationOfRegulatoryAssetDebtCosts	4000000	USD
	dei	Amendment Flag AmendmentFlag	false
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
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	dei	Document Period End Date DocumentPeriodEndDate	2018-06-30
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CY2018Q2	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.35
	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.69
CY2017Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	2000000000	shares
CY2018Q2	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	2000000000	shares
CY2017Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	963335888	shares
CY2018Q2	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	965906701	shares
CY2017Q4	us-gaap	Common Stock Value CommonStockValue	18964000000	USD
CY2018Q2	us-gaap	Common Stock Value CommonStockValue	19008000000	USD
CY2017Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	130000000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1113000000	USD
CY2018Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	582000000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1240000000	USD
CY2017Q2	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-1000000	USD
	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-22000000	USD
CY2018Q2	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	4000000	USD
	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	56000000	USD
CY2017Q2	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	129000000	USD
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	1091000000	USD
CY2018Q2	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	586000000	USD
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	1296000000	USD
	us-gaap	Contract With Customer Asset Cumulative Catch Up Adjustment To Revenue Change In Measure Of Progress ContractWithCustomerAssetCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress	28000000	USD
CY2017Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	283000000	USD
CY2018Q2	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	243000000	USD
	us-gaap	Contract With Customer Asset Reclassified To Receivable ContractWithCustomerAssetReclassifiedToReceivable	-68000000	USD
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	us-gaap	Contract With Customer Liability Cumulative Catch Up Adjustment To Revenue Change In Measure Of Progress ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress	298000000	USD
CY2017Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	35000000	USD
	us-gaap	Stock Issued1 StockIssued1	3000000	USD
CY2018Q2	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	28000000	USD
CY2017Q2	us-gaap	Cost Of Goods And Services Energy Commodities And Services CostOfGoodsAndServicesEnergyCommoditiesAndServices	2158000000	USD
	us-gaap	Stock Issued1 StockIssued1	3000000	USD
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CY2018Q2	us-gaap	Cost Of Goods And Services Energy Commodities And Services CostOfGoodsAndServicesEnergyCommoditiesAndServices	2277000000	USD
	us-gaap	Cost Of Goods And Services Energy Commodities And Services CostOfGoodsAndServicesEnergyCommoditiesAndServices	5566000000	USD
CY2017Q2	us-gaap	Cost Of Purchased Power CostOfPurchasedPower	928000000	USD
	us-gaap	Cost Of Purchased Power CostOfPurchasedPower	2033000000	USD
CY2018Q2	us-gaap	Cost Of Purchased Power CostOfPurchasedPower	1038000000	USD
	us-gaap	Cost Of Purchased Power CostOfPurchasedPower	2476000000	USD
CY2017Q2	us-gaap	Costs And Expenses CostsAndExpenses	7366000000	USD
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CY2018Q2	us-gaap	Costs And Expenses CostsAndExpenses	7138000000	USD
	us-gaap	Costs And Expenses CostsAndExpenses	15786000000	USD
CY2017Q4	us-gaap	Decommissioning Fund Investments DecommissioningFundInvestments	13272000000	USD
CY2018Q2	us-gaap	Decommissioning Fund Investments DecommissioningFundInvestments	13110000000	USD
CY2018Q2	us-gaap	Decrease In Unrecognized Tax Benefits Is Reasonably Possible DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible	681000000	USD
CY2017Q4	us-gaap	Deferred Costs And Other Assets DeferredCostsAndOtherAssets	30672000000	USD
CY2018Q2	us-gaap	Deferred Costs And Other Assets DeferredCostsAndOtherAssets	30476000000	USD
CY2017Q4	us-gaap	Deferred Credits And Other Liabilities DeferredCreditsAndOtherLiabilities	41220000000	USD
CY2018Q2	us-gaap	Deferred Credits And Other Liabilities DeferredCreditsAndOtherLiabilities	41216000000	USD
CY2017Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	201000000	USD
CY2018Q2	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	213000000	USD
CY2017Q4	us-gaap	Deferred Income Taxes And Other Tax Liabilities Noncurrent DeferredIncomeTaxesAndOtherTaxLiabilitiesNoncurrent	11235000000	USD
CY2018Q2	us-gaap	Deferred Income Taxes And Other Tax Liabilities Noncurrent DeferredIncomeTaxesAndOtherTaxLiabilitiesNoncurrent	11484000000	USD
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CY2017Q4	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	3736000000	USD
CY2018Q2	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	3412000000	USD
CY2018Q1	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Gains Losses After Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesAfterTax	18000000	USD
CY2017Q2	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	33000000	USD
	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	63000000	USD
CY2018Q2	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	50000000	USD
	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	82000000	USD
CY2017Q2	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	28000000	USD
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CY2018Q2	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	11000000	USD
	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	21000000	USD
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CY2017Q4	us-gaap	Derivative Asset Notional Amount DerivativeAssetNotionalAmount	811000000	USD
CY2018Q2	us-gaap	Derivative Asset Notional Amount DerivativeAssetNotionalAmount	965000000	USD
CY2017Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	976000000	USD
CY2018Q2	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	799000000	USD
CY2017Q4	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	337000000	USD
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	us-gaap	Stock Issued During Period Shares Share Based Compensation Gross StockIssuedDuringPeriodSharesShareBasedCompensationGross	1868000	shares
CY2018Q2	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	457000000	USD
CY2017Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	77000000	USD
CY2018Q2	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	48000000	USD
CY2017Q4	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Asset At Fair Value DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue	0	USD
CY2018Q2	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Asset At Fair Value DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue	0	USD
CY2017Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	232000000	USD
CY2018Q2	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	268000000	USD
CY2017Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	409000000	USD
CY2018Q2	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	507000000	USD
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CY2017Q4	us-gaap	Due To Affiliate Noncurrent DueToAffiliateNoncurrent	389000000	USD
CY2018Q2	us-gaap	Due To Affiliate Noncurrent DueToAffiliateNoncurrent	389000000	USD
CY2017Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.10
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CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.56
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CY2017Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.10
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CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.56
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CY2017Q2	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-1.512
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CY2018Q2	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.108
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CY2017Q2	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350
	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
CY2018Q2	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2018Q2	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	-0.013
	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	-0.006
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CY2018Q2	us-gaap	Effective Income Tax Rate Reconciliation Deductions Other EffectiveIncomeTaxRateReconciliationDeductionsOther	0.030
	us-gaap	Effective Income Tax Rate Reconciliation Deductions Other EffectiveIncomeTaxRateReconciliationDeductionsOther	0.028
CY2017Q2	us-gaap	Effective Income Tax Rate Reconciliation Minority Interest Income Expense EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpense	0.111
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CY2018Q2	us-gaap	Effective Income Tax Rate Reconciliation Minority Interest Income Expense EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpense	0.015
	us-gaap	Effective Income Tax Rate Reconciliation Minority Interest Income Expense EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpense	0.011
CY2017Q2	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.117
	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.002
CY2018Q2	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.002
	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.017
CY2017Q2	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	-0.536
	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	-0.009
CY2018Q2	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.034
	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.038
CY2017Q2	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Investment EffectiveIncomeTaxRateReconciliationTaxCreditsInvestment	0.108
CY2018Q2	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Investment EffectiveIncomeTaxRateReconciliationTaxCreditsInvestment	0.009
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CY2017Q2	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Other EffectiveIncomeTaxRateReconciliationTaxCreditsOther	0.211
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CY2018Q2	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Other EffectiveIncomeTaxRateReconciliationTaxCreditsOther	0.017
	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Other EffectiveIncomeTaxRateReconciliationTaxCreditsOther	0.023
CY2017Q2	us-gaap	Effective Income Tax Rate Reconciliation Tax Settlements Other EffectiveIncomeTaxRateReconciliationTaxSettlementsOther	-1.093
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CY2017Q2	us-gaap	Electric Utility Revenue ElectricUtilityRevenue	0	USD
	us-gaap	Electric Utility Revenue ElectricUtilityRevenue	0	USD
CY2017Q2	us-gaap	Electrical Generation Revenue ElectricalGenerationRevenue	3950000000	USD
	us-gaap	Electrical Generation Revenue ElectricalGenerationRevenue	8500000000	USD
CY2018Q2	us-gaap	Electrical Generation Revenue ElectricalGenerationRevenue	4305000000	USD
	us-gaap	Electrical Generation Revenue ElectricalGenerationRevenue	9417000000	USD
	us-gaap	Employee Benefits And Share Based Compensation Noncash EmployeeBenefitsAndShareBasedCompensationNoncash	51000000	USD
CY2017Q4	us-gaap	Energy Marketing Accounts Payable EnergyMarketingAccountsPayable	352000000	USD
CY2018Q2	us-gaap	Energy Marketing Accounts Payable EnergyMarketingAccountsPayable	257000000	USD
CY2017Q4	us-gaap	Energy Marketing Contract Liabilities Current EnergyMarketingContractLiabilitiesCurrent	231000000	USD
CY2018Q2	us-gaap	Energy Marketing Contract Liabilities Current EnergyMarketingContractLiabilitiesCurrent	171000000	USD
CY2017Q4	us-gaap	Energy Marketing Contract Liabilities Noncurrent EnergyMarketingContractLiabilitiesNoncurrent	609000000	USD
CY2018Q2	us-gaap	Energy Marketing Contract Liabilities Noncurrent EnergyMarketingContractLiabilitiesNoncurrent	538000000	USD
CY2017Q4	us-gaap	Energy Marketing Contracts Assets Current EnergyMarketingContractsAssetsCurrent	60000000	USD
CY2018Q2	us-gaap	Energy Marketing Contracts Assets Current EnergyMarketingContractsAssetsCurrent	46000000	USD
CY2017Q4	us-gaap	Energy Marketing Contracts Assets Noncurrent EnergyMarketingContractsAssetsNoncurrent	395000000	USD
CY2018Q2	us-gaap	Energy Marketing Contracts Assets Noncurrent EnergyMarketingContractsAssetsNoncurrent	379000000	USD
CY2017Q4	us-gaap	Energy Related Inventory Other Fossil Fuel EnergyRelatedInventoryOtherFossilFuel	340000000	USD
CY2018Q2	us-gaap	Energy Related Inventory Other Fossil Fuel EnergyRelatedInventoryOtherFossilFuel	270000000	USD
CY2016Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	0	USD
CY2017Q2	us-gaap	Gain Loss On Cash Flow Hedge Ineffectiveness Net GainLossOnCashFlowHedgeIneffectivenessNet	3000000	USD
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CY2018Q2	us-gaap	Gain Loss On Cash Flow Hedge Ineffectiveness Net GainLossOnCashFlowHedgeIneffectivenessNet	3000000	USD
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CY2017Q2	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	1000000	USD
	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	5000000	USD
CY2018Q2	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	4000000	USD
	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	60000000	USD
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	us-gaap	Gain Loss On Sales Of Assets And Asset Impairment Charges GainLossOnSalesOfAssetsAndAssetImpairmentCharges	60000000	USD
CY2017Q2	us-gaap	Gas Domestic Regulated Revenue GasDomesticRegulatedRevenue	0	USD
	us-gaap	Gas Domestic Regulated Revenue GasDomesticRegulatedRevenue	0	USD
CY2017Q4	us-gaap	Goodwill Goodwill	6677000000	USD
CY2018Q2	us-gaap	Goodwill Goodwill	6677000000	USD
CY2018Q2	us-gaap	Guarantee Obligations Maximum Exposure GuaranteeObligationsMaximumExposure	58000000	USD
	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	445000000	USD
	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	41000000	USD
CY2017Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	41000000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1233000000	USD
CY2018Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	613000000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1315000000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-19000000	USD
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CY2017Q2	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-9000000	USD
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CY2017Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-62000000	USD
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CY2018Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	66000000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	125000000	USD
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CY2018Q2	us-gaap	Increase Decrease In Other Deferred Liability IncreaseDecreaseInOtherDeferredLiability	16000000	USD
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CY2018Q1	us-gaap	Increase Decrease In Pension Plan Obligations IncreaseDecreaseInPensionPlanObligations	23000000	USD
CY2018Q1	us-gaap	Increase Decrease In Postretirement Obligations IncreaseDecreaseInPostretirementObligations	14000000	USD
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CY2017Q2	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	2000000	shares
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CY2017Q2	us-gaap	Interest Expense InterestExpense	426000000	USD
	us-gaap	Interest Expense InterestExpense	789000000	USD
CY2018Q2	us-gaap	Interest Expense InterestExpense	367000000	USD
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CY2017Q2	us-gaap	Interest Expense Related Party InterestExpenseRelatedParty	10000000	USD
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	us-gaap	Inventory Write Down InventoryWriteDown	51000000	USD
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CY2017Q2	us-gaap	Investment Income Interest InvestmentIncomeInterest	2000000	USD
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CY2018Q2	us-gaap	Investment Income Interest InvestmentIncomeInterest	6000000	USD
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CY2017Q4	us-gaap	Liabilities Liabilities	84583000000	USD
CY2018Q2	us-gaap	Liabilities Liabilities	84410000000	USD
CY2017Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	116770000000	USD
CY2018Q2	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	117249000000	USD
CY2017Q4	us-gaap	Liabilities Current LiabilitiesCurrent	10798000000	USD
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CY2017Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	2088000000	USD
CY2018Q2	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	1158000000	USD
CY2017Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	32176000000	USD
CY2018Q2	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	33179000000	USD
CY2017Q4	us-gaap	Long Term Investments LongTermInvestments	640000000	USD
CY2018Q2	us-gaap	Long Term Investments LongTermInvestments	636000000	USD
	us-gaap	Loss Contingency Loss In Period LossContingencyLossInPeriod	50000000	USD
CY2017Q4	us-gaap	Margin Deposit Assets MarginDepositAssets	117000000	USD
CY2018Q2	us-gaap	Margin Deposit Assets MarginDepositAssets	11000000	USD
CY2017Q4	us-gaap	Minority Interest MinorityInterest	2291000000	USD
CY2018Q2	us-gaap	Minority Interest MinorityInterest	2324000000	USD
	us-gaap	Minority Interest Period Increase Decrease MinorityInterestPeriodIncreaseDecrease	-23000000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	983000000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-185000000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-3981000000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-3846000000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	2895000000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	3869000000	USD
CY2017Q2	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-1000000	USD
	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-20000000	USD
CY2018Q2	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	3000000	USD
	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	54000000	USD
CY2017Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	95000000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	1086000000	USD
CY2018Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	539000000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	1125000000	USD
	us-gaap	Noncash Merger Related Costs NoncashMergerRelatedCosts	0	USD
	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	13000000	USD
CY2017Q2	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-259000000	USD
	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-375000000	USD
CY2018Q2	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-329000000	USD
	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-728000000	USD
	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	12	Reportable_segment
CY2017Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	300000000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	1608000000	USD
CY2018Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	942000000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	2043000000	USD
CY2017Q4	us-gaap	Other Assets Current OtherAssetsCurrent	1260000000	USD
CY2018Q2	us-gaap	Other Assets Current OtherAssetsCurrent	1360000000	USD
CY2017Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	1330000000	USD
CY2018Q2	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	1194000000	USD
CY2018Q2	us-gaap	Other Commitment OtherCommitment	3368000000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	2000000	USD
	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	3000000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	-5000000	USD
	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	-6000000	USD
CY2017Q2	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	-14000000	USD
	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	-28000000	USD
CY2018Q2	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	-17000000	USD
	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	-33000000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	1000000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	2000000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	0	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	0	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	35000000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	25000000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	44000000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	117000000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	2000000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	58000000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	1000000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-18000000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-49000000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-98000000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-61000000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-123000000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-24000000	USD
	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-50000000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-16000000	USD
	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-43000000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-1000000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	5000000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	4000000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	12000000	USD
CY2017Q2	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	915000000	USD
	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	1811000000	USD
CY2018Q2	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	1088000000	USD
	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	2179000000	USD
CY2017Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	982000000	USD
CY2018Q2	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	973000000	USD
CY2017Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	2097000000	USD
CY2018Q2	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	2087000000	USD
	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-415000000	USD
	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-479000000	USD
CY2017Q2	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	6000000	USD
	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	16000000	USD
CY2018Q2	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	8000000	USD
	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	14000000	USD
CY2017Q2	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	177000000	USD
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	434000000	USD
CY2018Q2	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	44000000	USD
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	17000000	USD
CY2017Q4	us-gaap	Other Postretirement Defined Benefit Plan Liabilities Noncurrent OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent	2093000000	USD
CY2018Q2	us-gaap	Other Postretirement Defined Benefit Plan Liabilities Noncurrent OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent	2132000000	USD
CY2017Q4	us-gaap	Other Receivables OtherReceivables	1132000000	USD
CY2018Q2	us-gaap	Other Receivables OtherReceivables	1407000000	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	9000000	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-31000000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	607000000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	666000000	USD
	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	212000000	USD
	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	57000000	USD
	us-gaap	Payments To Acquire Land PaymentsToAcquireLand	3000000	USD
	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	5339000000	USD
	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	3924000000	USD
CY2017	us-gaap	Payments To Acquire Other Receivables PaymentsToAcquireOtherReceivables	298000000	USD
	us-gaap	Payments To Acquire Other Receivables PaymentsToAcquireOtherReceivables	305000000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	3845000000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	3807000000	USD
	us-gaap	Pension And Other Postretirement Benefit Contributions PensionAndOtherPostretirementBenefitContributions	325000000	USD
	us-gaap	Pension And Other Postretirement Benefit Contributions PensionAndOtherPostretirementBenefitContributions	345000000	USD
CY2017Q2	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	163000000	USD
	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	320000000	USD
CY2018Q2	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	145000000	USD
	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	290000000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1150000000	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	981000000	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	1488000000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-23000000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-50000000	USD
	us-gaap	Proceeds From Repayments Of Short Term Debt Maturing In Three Months Or Less ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess	422000000	USD
	us-gaap	Proceeds From Repayments Of Short Term Debt Maturing In Three Months Or Less ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess	200000000	USD
	us-gaap	Proceeds From Sale And Maturity Of Other Investments ProceedsFromSaleAndMaturityOfOtherInvestments	5213000000	USD
	us-gaap	Proceeds From Sale And Maturity Of Other Investments ProceedsFromSaleAndMaturityOfOtherInvestments	3822000000	USD
	us-gaap	Proceeds From Sale Of Property Held For Sale ProceedsFromSaleOfPropertyHeldForSale	211000000	USD
	us-gaap	Proceeds From Sale Of Property Held For Sale ProceedsFromSaleOfPropertyHeldForSale	89000000	USD
	us-gaap	Proceeds From Short Term Debt Maturing In More Than Three Months ProceedsFromShortTermDebtMaturingInMoreThanThreeMonths	576000000	USD
	us-gaap	Proceeds From Short Term Debt Maturing In More Than Three Months ProceedsFromShortTermDebtMaturingInMoreThanThreeMonths	126000000	USD
	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	43000000	USD
	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	27000000	USD
CY2017Q2	us-gaap	Profit Loss ProfitLoss	94000000	USD
	us-gaap	Profit Loss ProfitLoss	1066000000	USD
CY2018Q2	us-gaap	Profit Loss ProfitLoss	542000000	USD
	us-gaap	Profit Loss ProfitLoss	1179000000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	74202000000	USD
CY2018Q2	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	75284000000	USD
	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	52000000	USD
	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	77000000	USD
CY2017Q2	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	17000000	USD
	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	33000000	USD
CY2018Q2	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	13000000	USD
	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	31000000	USD
CY2017Q4	us-gaap	Public Utilities Amount Of Allowance For Earnings On Equity Capitalized For Rate Making Purposes PublicUtilitiesAmountOfAllowanceForEarningsOnEquityCapitalizedForRateMakingPurposes	69000000	USD
CY2018Q2	us-gaap	Public Utilities Amount Of Allowance For Earnings On Equity Capitalized For Rate Making Purposes PublicUtilitiesAmountOfAllowanceForEarningsOnEquityCapitalizedForRateMakingPurposes	67000000	USD
	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Before Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax	4000000	USD
CY2017Q2	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-34000000	USD
	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-74000000	USD
CY2018Q2	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-43000000	USD
	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-87000000	USD
CY2017Q2	us-gaap	Regulated Operating Revenue RegulatedOperatingRevenue	3657000000	USD
	us-gaap	Regulated Operating Revenue RegulatedOperatingRevenue	7776000000	USD
CY2018Q2	us-gaap	Regulated Operating Revenue RegulatedOperatingRevenue	3797000000	USD
	us-gaap	Regulated Operating Revenue RegulatedOperatingRevenue	8368000000	USD
CY2017Q4	us-gaap	Regulatory Assets RegulatoryAssets	9288000000	USD
CY2018Q2	us-gaap	Regulatory Assets RegulatoryAssets	9316000000	USD
CY2017Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	1267000000	USD
CY2018Q2	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	1293000000	USD
CY2017Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	8021000000	USD
CY2018Q2	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	8023000000	USD
CY2017Q4	us-gaap	Regulatory Liabilities RegulatoryLiabilities	10388000000	USD
CY2018Q2	us-gaap	Regulatory Liabilities RegulatoryLiabilities	10378000000	USD
CY2017Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	523000000	USD
CY2018Q2	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	701000000	USD
CY2017Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	9865000000	USD
CY2018Q2	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	9677000000	USD
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	1049000000	USD
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	1309000000	USD
	us-gaap	Repayments Of Short Term Debt Maturing In More Than Three Months RepaymentsOfShortTermDebtMaturingInMoreThanThreeMonths	510000000	USD
	us-gaap	Repayments Of Short Term Debt Maturing In More Than Three Months RepaymentsOfShortTermDebtMaturingInMoreThanThreeMonths	1000000	USD
CY2016Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	253000000	USD
CY2017Q2	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	252000000	USD
CY2017Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	207000000	USD
CY2018Q2	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	206000000	USD
CY2016Q4	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	26000000	USD
CY2017Q2	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	23000000	USD
CY2017Q4	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	85000000	USD
CY2018Q2	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	128000000	USD
	us-gaap	Restructuring Costs RestructuringCosts	25000000	USD
CY2017Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	14081000000	USD
CY2018Q2	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	14551000000	USD
CY2017Q2	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	58000000	USD
	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	137000000	USD
CY2018Q2	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	-26000000	USD
	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	-16000000	USD
CY2017Q2	us-gaap	Revenue From Related Parties RevenueFromRelatedParties	0	USD
	us-gaap	Revenue From Related Parties RevenueFromRelatedParties	0	USD
CY2018Q2	us-gaap	Revenue From Related Parties RevenueFromRelatedParties	0	USD
	us-gaap	Revenue From Related Parties RevenueFromRelatedParties	0	USD
CY2018Q2	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	574000000	USD
CY2018Q2	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	279000000	USD
CY2018Q2	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	113000000	USD
CY2018Q2	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	46000000	USD
CY2018Q2	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	128000000	USD
CY2018Q2	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	1140000000	USD
CY2017Q2	us-gaap	Revenues Revenues	7665000000	USD
	us-gaap	Revenues Revenues	16413000000	USD
CY2018Q2	us-gaap	Revenues Revenues	8076000000	USD
	us-gaap	Revenues Revenues	17769000000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	57000000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	47000000	USD
CY2017Q4	us-gaap	Shares Issued SharesIssued	965168000	shares
CY2018Q2	us-gaap	Shares Issued SharesIssued	967739000	shares
CY2017Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	929000000	USD
CY2018Q2	us-gaap	Short Term Borrowings ShortTermBorrowings	1252000000	USD
CY2017Q4	us-gaap	Spent Nuclear Fuel Obligation Noncurrent SpentNuclearFuelObligationNoncurrent	1147000000	USD
CY2018Q2	us-gaap	Spent Nuclear Fuel Obligation Noncurrent SpentNuclearFuelObligationNoncurrent	1157000000	USD
	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	27000000	USD
	us-gaap	Stock Issued During Period Value Share Based Compensation Gross StockIssuedDuringPeriodValueShareBasedCompensationGross	17000000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	29896000000	USD
CY2018Q2	us-gaap	Stockholders Equity StockholdersEquity	30515000000	USD
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	32187000000	USD
CY2018Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	32839000000	USD
CY2017Q2	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	420000000	USD
	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	857000000	USD
CY2018Q2	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	428000000	USD
	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	874000000	USD
	us-gaap	Treasury Stock Reissued At Lower Than Repurchase Price TreasuryStockReissuedAtLowerThanRepurchasePrice	1054000000	USD
CY2017Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	1832457	shares
CY2018Q2	us-gaap	Treasury Stock Shares TreasuryStockShares	1832457	shares
CY2017Q4	us-gaap	Treasury Stock Value TreasuryStockValue	123000000	USD
CY2018Q2	us-gaap	Treasury Stock Value TreasuryStockValue	123000000	USD
	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-230000000	USD
	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-151000000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	743000000	USD
CY2018Q2	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	732000000	USD
CY2018Q2	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	444000000	USD
CY2017Q2	us-gaap	Utilities Operating Expense Maintenance Operations And Other Costs And Expenses UtilitiesOperatingExpenseMaintenanceOperationsAndOtherCostsAndExpenses	2945000000	USD
	us-gaap	Utilities Operating Expense Maintenance Operations And Other Costs And Expenses UtilitiesOperatingExpenseMaintenanceOperationsAndOtherCostsAndExpenses	5383000000	USD
CY2018Q2	us-gaap	Utilities Operating Expense Maintenance Operations And Other Costs And Expenses UtilitiesOperatingExpenseMaintenanceOperationsAndOtherCostsAndExpenses	2307000000	USD
	us-gaap	Utilities Operating Expense Maintenance Operations And Other Costs And Expenses UtilitiesOperatingExpenseMaintenanceOperationsAndOtherCostsAndExpenses	4691000000	USD
CY2017Q2	us-gaap	Utilities Operating Expense Taxes UtilitiesOperatingExpenseTaxes	213000000	USD
	us-gaap	Utilities Operating Expense Taxes UtilitiesOperatingExpenseTaxes	438000000	USD
CY2018Q2	us-gaap	Utilities Operating Expense Taxes UtilitiesOperatingExpenseTaxes	218000000	USD
	us-gaap	Utilities Operating Expense Taxes UtilitiesOperatingExpenseTaxes	452000000	USD
CY2017Q4	us-gaap	Variable Interest Entity Consolidated Assets Current VariableInterestEntityConsolidatedAssetsCurrent	662000000	USD
CY2018Q2	us-gaap	Variable Interest Entity Consolidated Assets Current VariableInterestEntityConsolidatedAssetsCurrent	744000000	USD
CY2017Q4	us-gaap	Variable Interest Entity Consolidated Assets Noncurrent VariableInterestEntityConsolidatedAssetsNoncurrent	9317000000	USD
CY2018Q2	us-gaap	Variable Interest Entity Consolidated Assets Noncurrent VariableInterestEntityConsolidatedAssetsNoncurrent	9234000000	USD
CY2017Q4	us-gaap	Variable Interest Entity Consolidated Assets Not Pledged VariableInterestEntityConsolidatedAssetsNotPledged	9597000000	USD
CY2018Q2	us-gaap	Variable Interest Entity Consolidated Assets Not Pledged VariableInterestEntityConsolidatedAssetsNotPledged	9612000000	USD
CY2017Q4	us-gaap	Variable Interest Entity Consolidated Carrying Amount Assets VariableInterestEntityConsolidatedCarryingAmountAssets	9979000000	USD
CY2018Q2	us-gaap	Variable Interest Entity Consolidated Carrying Amount Assets VariableInterestEntityConsolidatedCarryingAmountAssets	9978000000	USD
CY2017Q4	us-gaap	Variable Interest Entity Consolidated Carrying Amount Liabilities VariableInterestEntityConsolidatedCarryingAmountLiabilities	3624000000	USD
CY2018Q2	us-gaap	Variable Interest Entity Consolidated Carrying Amount Liabilities VariableInterestEntityConsolidatedCarryingAmountLiabilities	3552000000	USD
CY2017Q4	us-gaap	Variable Interest Entity Consolidated Liabilities Current VariableInterestEntityConsolidatedLiabilitiesCurrent	308000000	USD
CY2018Q2	us-gaap	Variable Interest Entity Consolidated Liabilities Current VariableInterestEntityConsolidatedLiabilitiesCurrent	268000000	USD
CY2017Q4	us-gaap	Variable Interest Entity Consolidated Liabilities No Recourse VariableInterestEntityConsolidatedLiabilitiesNoRecourse	3618000000	USD
CY2018Q2	us-gaap	Variable Interest Entity Consolidated Liabilities No Recourse VariableInterestEntityConsolidatedLiabilitiesNoRecourse	3544000000	USD
CY2017Q4	us-gaap	Variable Interest Entity Consolidated Liabilities Noncurrent VariableInterestEntityConsolidatedLiabilitiesNoncurrent	3316000000	USD
CY2018Q2	us-gaap	Variable Interest Entity Consolidated Liabilities Noncurrent VariableInterestEntityConsolidatedLiabilitiesNoncurrent	3284000000	USD
CY2018Q2	us-gaap	Variable Interest Entity Entity Maximum Loss Exposure Amount VariableInterestEntityEntityMaximumLossExposureAmount	9000000	USD
CY2017Q4	us-gaap	Variable Interest Entity Nonconsolidated Carrying Amount Assets VariableInterestEntityNonconsolidatedCarryingAmountAssets	1134000000	USD
CY2018Q2	us-gaap	Variable Interest Entity Nonconsolidated Carrying Amount Assets VariableInterestEntityNonconsolidatedCarryingAmountAssets	1111000000	USD
CY2017Q4	us-gaap	Variable Interest Entity Nonconsolidated Carrying Amount Liabilities VariableInterestEntityNonconsolidatedCarryingAmountLiabilities	265000000	USD
CY2018Q2	us-gaap	Variable Interest Entity Nonconsolidated Carrying Amount Liabilities VariableInterestEntityNonconsolidatedCarryingAmountLiabilities	261000000	USD
CY2017Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	936000000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	932000000	shares
CY2018Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	969000000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	968000000	shares
CY2017Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	934000000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	931000000	shares
CY2018Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	967000000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	967000000	shares
	us-gaap	Description Of New Accounting Pronouncements Not Yet Adopted DescriptionOfNewAccountingPronouncementsNotYetAdopted	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-bottom:12px;padding-top:12px;text-align:justify;text-indent:32px;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;font-style:italic;font-weight:bold;">New Accounting Standards Issued and Not Yet Adopted as of June 30, 2018: </font><font style="font-family:Arial;font-size:10pt;">The following new authoritative accounting guidance issued by the FASB has not yet been adopted and reflected by the Registrants in their consolidated financial statements as of June 30, 2018. Unless otherwise indicated, the Registrants are currently assessing the impacts such guidance may have (which could be material) on their Consolidated Balance Sheets, Consolidated Statements of Operations and Comprehensive Income, Consolidated Statements of Cash Flows and disclosures, as well as the potential to early adopt where applicable. The Registrants have assessed other FASB issuances of new standards which are not listed below given the current expectation that such standards will not significantly impact the Registrants' financial reporting.</font></div><div style="line-height:120%;padding-bottom:12px;padding-top:12px;text-align:justify;text-indent:30px;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;font-style:italic;">Leases (Issued February 2016):</font><font style="font-family:Arial;font-size:10pt;"> Increases transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. The standard is effective January 1, 2019. Early adoption is permitted; however, the Registrants will not early adopt the standard. The issued guidance required a modified retrospective transition approach, which requires lessees and lessors to recognize and measure leases at the beginning of the earliest period presented (January 1, 2017). In July 2018, the FASB issued an amendment to the standard giving entities the option to apply the requirements of the standard in the period of adoption (January 1, 2019) with no restatement of prior periods.  Exelon plans to elect this expedient.</font></div><div style="line-height:120%;padding-bottom:12px;padding-top:12px;text-align:justify;text-indent:30px;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">The new guidance requires lessees to recognize both the right-of-use assets and lease liabilities in the balance sheet for most leases, whereas today only finance lease liabilities (referred to as capital leases) are recognized in the balance sheet. In addition, the definition of a lease has been revised which may result in changes to the classification of an arrangement as a lease. Under the new guidance, an arrangement that conveys the right to control the use of an identified asset by obtaining substantially all of its economic benefits and directing how it is used is a lease, whereas the current definition focuses on the ability to control the use of the asset or to obtain its output. Quantitative and qualitative disclosures related to the amount, timing and judgments of an entity’s accounting for leases and the related cash flows are expanded. Disclosure requirements apply to both lessees and lessors, whereas current disclosures relate only to lessees. Significant changes to lease systems, processes and procedures are required to implement the requirements of the new standard. The recognition, measurement, and presentation of expenses and cash flows arising from a lease by a lessee have not significantly changed from current GAAP. Lessor accounting is also largely unchanged.</font></div><div style="line-height:120%;padding-bottom:12px;padding-top:12px;text-align:justify;text-indent:29px;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">The standard provides a number of transition practical expedients that entities may elect. These include a "package of three" expedients that must be taken together and allow entities to (1) not reassess whether existing contracts contain leases, (2) carryforward the existing lease classification, and (3) not reassess initial direct costs associated with existing leases. The Registrants expect to elect this practical expedient.</font></div><div style="line-height:120%;padding-bottom:12px;padding-top:12px;text-align:justify;text-indent:29px;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">In January 2018, the FASB issued additional guidance which provides another optional transition practical expedient. This practical expedient allows entities to not evaluate land easements under the new guidance at adoption if they were not previously accounted for as leases.</font></div><div style="line-height:120%;padding-bottom:12px;padding-top:12px;text-indent:30px;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">The Registrants have assessed the lease standard and are executing a detailed implementation plan in preparation for adoption on January 1, 2019. Key activities in the implementation plan include:</font></div><table cellpadding="0" cellspacing="0" style="padding-top:12px;padding-bottom:12px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:48px;" 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:10pt;padding-left:29px;"><font style="font-family:Arial;font-size:10pt;">•</font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">Developing a complete lease inventory and abstracting the required data attributes into a lease accounting system that supports the Registrants' lease portfolios and integrates with existing systems.</font></div></td></tr></table><table cellpadding="0" cellspacing="0" style="padding-top:12px;padding-bottom:12px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:48px;" 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:10pt;padding-left:29px;"><font style="font-family:Arial;font-size:10pt;">•</font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">Evaluating the transition practical expedients available under the guidance.</font></div></td></tr></table><table cellpadding="0" cellspacing="0" style="padding-top:12px;padding-bottom:12px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:48px;" 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:10pt;padding-left:29px;"><font style="font-family:Arial;font-size:10pt;">•</font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">Identifying, assessing and documenting technical accounting issues, policy considerations and financial reporting implications.</font></div></td></tr></table><table cellpadding="0" cellspacing="0" style="padding-top:12px;padding-bottom:12px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:48px;" 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:10pt;padding-left:29px;"><font style="font-family:Arial;font-size:10pt;">•</font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">Identifying and implementing changes to processes and controls to ensure all impacts of the new guidance are effectively addressed.</font></div></td></tr></table><div style="line-height:120%;padding-bottom:12px;padding-top:12px;text-align:justify;text-indent:32px;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;font-style:italic;">Impairment of Financial Instruments (Issued June 2016):</font><font style="font-family:Arial;font-size:10pt;font-style:italic;font-weight:bold;"> </font><font style="font-family:Arial;font-size:10pt;">Provides for a new Current Expected Credit Loss (CECL) impairment model for specified financial instruments including loans, trade receivables, debt securities classified as held-to-maturity investments and net investments in leases recognized by a lessor. Under the new guidance, on initial recognition and at each reporting period, an entity is required to recognize an allowance that reflects the entity’s current estimate of credit losses expected to be incurred over the life of the financial instrument. The standard does not make changes to the existing impairment models for non-financial assets such as fixed assets, intangibles and goodwill. The standard will be effective January 1, 2020 (with early adoption as of January 1, 2019 permitted) and requires a modified retrospective transition approach through a cumulative-effect adjustment to retained earnings as of the beginning of the period of adoption.</font></div><div style="line-height:120%;padding-bottom:12px;padding-top:12px;text-align:justify;text-indent:32px;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;font-style:italic;">Goodwill Impairment (Issued January 2017):</font><font style="font-family:Arial;font-size:10pt;"> Simplifies the accounting for goodwill impairment by removing Step 2 of the current test, which requires calculation of a hypothetical purchase price allocation. Under the revised guidance, goodwill impairment will be measured as the amount by which a reporting unit’s carrying value exceeds its fair value, not to exceed the carrying amount of goodwill (currently Step 1 of the two-step impairment test). Entities will continue to have the option to perform a qualitative assessment to determine if a quantitative impairment test is necessary. Exelon, Generation, ComEd, PHI and DPL have goodwill as of </font><font style="font-family:Arial;font-size:10pt;">June 30, 2018</font><font style="font-family:Arial;font-size:10pt;">. This updated guidance is not currently expected to impact the Registrants’ financial reporting. The standard is effective January 1, 2020, with early adoption permitted, and must be applied on a prospective basis.</font></div><div style="line-height:120%;padding-bottom:12px;padding-top:12px;text-align:justify;text-indent:30px;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;font-style:italic;">Derivatives and Hedging (Issued September 2017): </font><font style="font-family:Arial;font-size:10pt;">Allows more financial and nonfinancial hedging strategies to be eligible for hedge accounting. The amendments are intended to more closely align hedge accounting with companies’ risk management strategies, simplify the application of hedge accounting, and increase transparency as to the scope and results of hedging programs. There are also amendments related to effectiveness testing and disclosure requirements. The guidance is effective January 1, 2019 and early adoption is permitted with a modified retrospective transition approach. The Registrants are currently assessing this standard but do not currently expect a significant impact given the limited activity for which the Registrants elect hedge accounting and because the Registrants do not anticipate increasing their use of hedge accounting as a result of this standard.</font></div></div>
	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:10pt;"><font style="font-family:Arial;font-size:10pt;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;text-indent:32px;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">Certain prior year amounts in the Registrants' Consolidated Statements of Operations and Comprehensive Incom</font><font style="font-family:Arial;font-size:10pt;">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.</font></div><div style="line-height:120%;padding-bottom:12px;padding-top:12px;text-align:justify;text-indent:30px;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">Beginning on January 1, 2018, Exelon adopted the following new accounting standards requiring reclassification or adjustments to previously reported information as follows:</font></div><table cellpadding="0" cellspacing="0" style="padding-top:12px;padding-bottom:12px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:48px;" 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:10pt;padding-left:24px;"><font style="font-family:Arial;font-size:10pt;">•</font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;font-style:italic;">Statement of Cash Flows: Classification of Restricted Cash.</font><font style="font-family:Arial;font-size:10pt;"> The Registrants applied the new guidance using the full retrospective method and, accordingly, have recasted the presentation of restricted cash in their Consolidated Statements of Cash Flows in the prior periods presented. See Note </font><font style="font-family:Arial;font-size:10pt;">18</font><font style="font-family:Arial;font-size:10pt;"> — </font><font style="font-family:Arial;font-size:10pt;">Supplemental Financial Information</font><font style="font-family:Arial;font-size:10pt;"> for additional information.</font></div></td></tr></table><table cellpadding="0" cellspacing="0" style="padding-top:12px;padding-bottom:12px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:48px;" 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:10pt;padding-left:24px;"><font style="font-family:Arial;font-size:10pt;">•</font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;font-style:italic;">Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income.</font><font style="font-family:Arial;font-size:10pt;">  Exelon early adopted and retrospectively applied the new guidance to when the effects of the TCJA were recognized and, accordingly, recasted its December 31, 2017 AOCI and retained earnings in its Consolidated Balance Sheet and Consolidated Statement of Changes in Shareholders' Equity.  Exelon's accounting policy is to release the stranded tax effects from AOCI related to its pension and OPEB plans under a portfolio (or aggregate) approach as an entire pension or OPEB plan is liquidated or terminated. See Note </font><font style="font-family:Arial;font-size:10pt;">2</font><font style="font-family:Arial;font-size:10pt;"> — </font><font style="font-family:Arial;font-size:10pt;">New Accounting Standards</font><font style="font-family:Arial;font-size:10pt;"> for additional information.</font></div></td></tr></table><table cellpadding="0" cellspacing="0" style="padding-top:12px;padding-bottom:12px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:48px;" 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:10pt;padding-left:24px;"><font style="font-family:Arial;font-size:10pt;">•</font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;font-style:italic;">Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost.</font><font style="font-family:Arial;font-size:10pt;"> Exelon applied this guidance retrospectively for the presentation of the service and other non-service costs components of net benefit cost and, accordingly, have recasted those amounts, which were not material, in its Consolidated Statement of Operations and Comprehensive Income in prior periods presented. As part of the adoption, Exelon elected the practical expedient that permits an employer to use the amounts disclosed in its pension and other postretirement benefit plan note for the comparative periods as the estimation basis for applying the retrospective presentation requirements. See Note </font><font style="font-family:Arial;font-size:10pt;">14</font><font style="font-family:Arial;font-size:10pt;"> — </font><font style="font-family:Arial;font-size:10pt;">Retirement Benefits</font><font style="font-family:Arial;font-size:10pt;"> for additional information.</font></div></td></tr></table><table cellpadding="0" cellspacing="0" style="padding-top:12px;padding-bottom:12px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:48px;" 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:10pt;padding-left:24px;"><font style="font-family:Arial;font-size:10pt;">•</font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;font-style:italic;">Revenue from Contracts with Customers.</font><font style="font-family:Arial;font-size:10pt;"> The Registrants applied the new guidance using the full retrospective method and, accordingly, have recasted certain amounts in their Consolidated Statements of Operations and Comprehensive Income, Consolidated Statements of Cash Flows, Consolidated Balance Sheets, Consolidated Statements of Changes in Shareholders' Equity and Combined Notes to Consolidated Financial Statements in the prior periods presented. The amounts recasted in the Registrants' Consolidated Statements of Operations and Comprehensive Income are shown in the table below. The amounts recasted in the Registrants’ Consolidated Statements of Cash Flows, Consolidated Balance Sheets, Consolidated Statements of Changes in Shareholders' Equity and Combined Notes to Consolidated Financial Statements were not material.  See Note </font><font style="font-family:Arial;font-size:10pt;">5</font><font style="font-family:Arial;font-size:10pt;"> — </font><font style="font-family:Arial;font-size:10pt;">Revenue from Contracts with Customers </font><font style="font-family:Arial;font-size:10pt;">for additional information.</font></div></td></tr></table></div>

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$EXC
EXELON CORP Stock $exc

2018 Q2 Form 10-Q Financial Statement

#000162828018010287 Filed on August 02, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$EXC EXELON CORP Stock $exc

2018 Q2 Form 10-Q Financial Statement

#000162828018010287 Filed on August 02, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$EXC
EXELON CORP Stock $exc