$EXC
EXELON CORP Stock $exc

$exc Overview Financials Valuation SEC Filings Company Website

2018 Q1 Form 10-Q Financial Statement

#000162828018005662 Filed on May 02, 2018

Income Statement

Concept	2018 Q1	2017 Q1
Revenue	$9.691B	$8.747B
YoY Change	10.79%	15.5%
Cost Of Revenue	$4.437B	$3.633B
YoY Change	22.13%	11.65%
Gross Profit	$5.256B	$5.114B
YoY Change	2.78%	18.41%
Gross Profit Margin	54.24%	58.47%
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$1.091B	$754.0M
YoY Change	44.69%	24.42%
% of Gross Profit	20.76%	14.74%
Operating Expenses	$8.648B	$3.810B
YoY Change	126.98%	-0.91%
Operating Profit	$1.099B	$1.308B
YoY Change	-15.98%	170.81%
Interest Expense	$365.0M	$363.0M
YoY Change	0.55%	31.05%
% of Operating Profit	33.21%	27.75%
Other Income/Expense, Net	-$399.0M	-$116.0M
YoY Change	243.97%	-32.95%
Pretax Income	$702.0M	$1.192B
YoY Change	-41.11%	284.52%
Income Tax	$59.00M	$211.0M
% Of Pretax Income	8.4%	17.7%
Net Earnings	$636.0M	$971.0M
YoY Change	-34.5%	689.43%
Net Earnings / Revenue	6.56%	11.1%
Basic Earnings Per Share	$0.60	$1.07
Diluted Earnings Per Share	$0.60	$1.06
COMMON SHARES
Basic Shares Outstanding	966.0M shares	928.0M shares
Diluted Shares Outstanding	968.0M shares	930.0M shares

Balance Sheet

Concept	2018 Q1	2017 Q1
SHORT-TERM ASSETS
Cash & Short-Term Investments	$787.0M	$1.859B
YoY Change	-57.67%	93.65%
Cash & Equivalents	$787.0M	$609.0M
Short-Term Investments		$1.250B
Other Short-Term Assets	$1.495B	$1.221B
YoY Change	22.44%	12.43%
Inventory	$1.471B	$1.561B
Prepaid Expenses
Receivables	$4.190B	$3.886B
Other Receivables	$1.103B	$1.133B
Total Short-Term Assets	$11.53B	$12.19B
YoY Change	-5.42%	7.3%
LONG-TERM ASSETS
Property, Plant & Equipment	$74.71B	$72.63B
YoY Change	2.87%	4.65%
Goodwill	$6.677B	$6.677B
YoY Change	0.0%	-0.16%
Intangibles
YoY Change
Long-Term Investments	$640.0M	$648.0M
YoY Change	-1.23%	42.42%
Other Assets	$1.333B	$1.440B
YoY Change	-7.43%	3.0%
Total Long-Term Assets	$105.5B	$104.9B
YoY Change	0.58%	4.48%
TOTAL ASSETS
Total Short-Term Assets	$11.53B	$12.19B
Total Long-Term Assets	$105.5B	$104.9B
Total Assets	$117.0B	$117.1B
YoY Change	-0.04%	4.77%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$3.207B	$3.011B
YoY Change	6.51%	4.77%
Accrued Expenses	$1.569B	$3.007B
YoY Change	-47.82%	33.05%
Deferred Revenue	$35.00M
YoY Change
Short-Term Debt	$1.654B	$2.048B
YoY Change	-19.24%	-43.74%
Long-Term Debt Due	$1.203B	$3.645B
YoY Change	-67.0%	77.11%
Total Short-Term Liabilities	$10.15B	$14.44B
YoY Change	-29.67%	4.84%
LONG-TERM LIABILITIES
Long-Term Debt	$32.91B	$31.04B
YoY Change	5.99%	5.9%
Other Long-Term Liabilities	$2.067B	$1.853B
YoY Change	11.55%	-1.75%
Total Long-Term Liabilities	$34.97B	$32.90B
YoY Change	6.31%	5.44%
TOTAL LIABILITIES
Total Short-Term Liabilities	$10.15B	$14.44B
Total Long-Term Liabilities	$34.97B	$32.90B
Total Liabilities	$84.45B	$88.78B
YoY Change	-4.87%	5.02%
SHAREHOLDERS EQUITY
Retained Earnings	$14.35B	$12.72B
YoY Change	12.78%	6.41%
Common Stock	$18.97B	$18.81B
YoY Change	0.88%	0.65%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$123.0M	-$123.0M
YoY Change	-200.0%	-105.29%
Treasury Stock Shares	1.832M shares	34.74M shares
Shareholders Equity	$30.23B	$26.53B
YoY Change
Total Liabilities & Shareholders Equity	$117.0B	$117.1B
YoY Change	-0.04%	4.77%

Cashflow Statement

Concept	2018 Q1	2017 Q1
OPERATING ACTIVITIES
Net Income	$636.0M	$971.0M
YoY Change	-34.5%	689.43%
Depreciation, Depletion And Amortization	$1.091B	$754.0M
YoY Change	44.69%	24.42%
Cash From Operating Activities	$1.502B	$1.074B
YoY Change	39.85%	-27.09%
INVESTING ACTIVITIES
Capital Expenditures	$1.880B	$2.009B
YoY Change	-6.42%	-8.76%
Acquisitions
YoY Change
Other Investing Activities	-$3.000M	$18.00M
YoY Change	-116.67%	800.0%
Cash From Investing Activities	-$1.857B	-$2.283B
YoY Change	-18.66%	-73.29%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net	$1.241B	$65.00M
YoY Change	1809.23%	-43.97%
Cash From Financing Activities	$264.0M	$1.184B
YoY Change	-77.7%	-22.77%
NET CHANGE
Cash From Operating Activities	$1.502B	$1.074B
Cash From Investing Activities	-$1.857B	-$2.283B
Cash From Financing Activities	$264.0M	$1.184B
Net Change In Cash	-$91.00M	-$25.00M
YoY Change	264.0%	-99.55%
FREE CASH FLOW
Cash From Operating Activities	$1.502B	$1.074B
Capital Expenditures	$1.880B	$2.009B
Free Cash Flow	-$378.0M	-$935.0M
YoY Change	-59.57%	28.26%

Facts In Submission

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CY2018Q1	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2018
CY2018Q1	dei	Document Period End Date DocumentPeriodEndDate	2018-03-31
CY2018Q1	dei	Document Type DocumentType	10-Q
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CY2018Q1	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2018Q1	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2018Q1	dei	Entity Registrant Name EntityRegistrantName	EXELON CORP
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CY2017Q4	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	3736000000	USD
CY2018Q1	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	3433000000	USD
CY2017Q1	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Gains Losses After Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesAfterTax	18000000	USD
CY2017Q1	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	30000000	USD
CY2018Q1	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	32000000	USD
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CY2017Q1	us-gaap	Depreciation Depreciation	754000000	USD
CY2018Q1	us-gaap	Depreciation Depreciation	926000000	USD
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CY2018Q1	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	1501000000	USD
CY2018Q1	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	978000000	USD
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CY2018Q1	us-gaap	Derivative Asset Notional Amount DerivativeAssetNotionalAmount	949000000	USD
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CY2017Q4	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	337000000	USD
CY2018Q1	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	527000000	USD
CY2017Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	77000000	USD
CY2018Q1	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	53000000	USD
CY2017Q4	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Asset At Fair Value DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue	-1000000	USD
CY2018Q1	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Asset At Fair Value DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue	-2000000	USD
CY2017Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	232000000	USD
CY2018Q1	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	415000000	USD
CY2017Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	409000000	USD
CY2018Q1	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	468000000	USD
CY2018Q1	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	334000000	USD
CY2017Q4	us-gaap	Due To Affiliate Noncurrent DueToAffiliateNoncurrent	389000000	USD
CY2018Q1	us-gaap	Due To Affiliate Noncurrent DueToAffiliateNoncurrent	389000000	USD
CY2017Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.07
CY2018Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.61
CY2017Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.06
CY2018Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.60
CY2017Q1	us-gaap	Gain Loss On Sales Of Assets And Asset Impairment Charges GainLossOnSalesOfAssetsAndAssetImpairmentCharges	4000000	USD
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CY2018Q1	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.084
CY2017Q1	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
CY2018Q1	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2017Q1	us-gaap	Effective Income Tax Rate Reconciliation Minority Interest Income Expense EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpense	0.000
CY2018Q1	us-gaap	Effective Income Tax Rate Reconciliation Minority Interest Income Expense EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpense	-0.007
CY2017Q1	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.001
CY2018Q1	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.028
CY2017Q1	us-gaap	Effective Income Tax Rate Reconciliation Other Reconciling Items Percent EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent	-0.024
CY2018Q1	us-gaap	Effective Income Tax Rate Reconciliation Other Reconciling Items Percent EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent	-0.027
CY2017Q1	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.009
CY2018Q1	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.041
CY2017Q1	us-gaap	Effective Income Tax Rate Reconciliation Tax Contingencies Other EffectiveIncomeTaxRateReconciliationTaxContingenciesOther	-0.035
CY2018Q1	us-gaap	Effective Income Tax Rate Reconciliation Tax Contingencies Other EffectiveIncomeTaxRateReconciliationTaxContingenciesOther	0.004
CY2017Q1	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Investment EffectiveIncomeTaxRateReconciliationTaxCreditsInvestment	0.004
CY2018Q1	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Investment EffectiveIncomeTaxRateReconciliationTaxCreditsInvestment	0.013
CY2017Q1	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Other EffectiveIncomeTaxRateReconciliationTaxCreditsOther	-0.007
CY2018Q1	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Other EffectiveIncomeTaxRateReconciliationTaxCreditsOther	-0.028
CY2017Q1	us-gaap	Effective Income Tax Rate Reconciliation Tax Settlements EffectiveIncomeTaxRateReconciliationTaxSettlements	-0.115
CY2018Q1	us-gaap	Effective Income Tax Rate Reconciliation Tax Settlements Other EffectiveIncomeTaxRateReconciliationTaxSettlementsOther	-0.060
CY2017Q1	us-gaap	Electric Utility Revenue ElectricUtilityRevenue	0	USD
CY2017Q1	us-gaap	Electrical Generation Revenue ElectricalGenerationRevenue	4550000000	USD
CY2018Q1	us-gaap	Electrical Generation Revenue ElectricalGenerationRevenue	5113000000	USD
CY2017Q4	us-gaap	Energy Marketing Accounts Payable EnergyMarketingAccountsPayable	352000000	USD
CY2018Q1	us-gaap	Energy Marketing Accounts Payable EnergyMarketingAccountsPayable	333000000	USD
CY2017Q4	us-gaap	Energy Marketing Contract Liabilities Current EnergyMarketingContractLiabilitiesCurrent	231000000	USD
CY2018Q1	us-gaap	Energy Marketing Contract Liabilities Current EnergyMarketingContractLiabilitiesCurrent	202000000	USD
CY2017Q4	us-gaap	Energy Marketing Contract Liabilities Noncurrent EnergyMarketingContractLiabilitiesNoncurrent	609000000	USD
CY2018Q1	us-gaap	Energy Marketing Contract Liabilities Noncurrent EnergyMarketingContractLiabilitiesNoncurrent	579000000	USD
CY2017Q4	us-gaap	Energy Marketing Contracts Assets Current EnergyMarketingContractsAssetsCurrent	60000000	USD
CY2018Q1	us-gaap	Energy Marketing Contracts Assets Current EnergyMarketingContractsAssetsCurrent	55000000	USD
CY2017Q4	us-gaap	Energy Marketing Contracts Assets Noncurrent EnergyMarketingContractsAssetsNoncurrent	395000000	USD
CY2018Q1	us-gaap	Energy Marketing Contracts Assets Noncurrent EnergyMarketingContractsAssetsNoncurrent	385000000	USD
CY2017Q4	us-gaap	Energy Related Inventory Other Fossil Fuel EnergyRelatedInventoryOtherFossilFuel	340000000	USD
CY2018Q1	us-gaap	Energy Related Inventory Other Fossil Fuel EnergyRelatedInventoryOtherFossilFuel	180000000	USD
CY2015Q3	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	25000000	USD
CY2018Q1	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	25000000	USD
CY2017Q1	us-gaap	Gain Loss On Cash Flow Hedge Ineffectiveness Net GainLossOnCashFlowHedgeIneffectivenessNet	4000000	USD
CY2018Q1	us-gaap	Gain Loss On Cash Flow Hedge Ineffectiveness Net GainLossOnCashFlowHedgeIneffectivenessNet	6000000	USD
CY2017Q1	us-gaap	Gain Loss On Investments GainLossOnInvestments	175000000	USD
CY2018Q1	us-gaap	Gain Loss On Investments GainLossOnInvestments	-68000000	USD
CY2017Q1	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	4000000	USD
CY2018Q1	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	56000000	USD
CY2018Q1	us-gaap	Gain Loss On Sales Of Assets And Asset Impairment Charges GainLossOnSalesOfAssetsAndAssetImpairmentCharges	56000000	USD
CY2017Q1	us-gaap	Gas Domestic Regulated Revenue GasDomesticRegulatedRevenue	0	USD
CY2017Q4	us-gaap	Goodwill Goodwill	6677000000	USD
CY2018Q1	us-gaap	Goodwill Goodwill	6677000000	USD
CY2018Q1	us-gaap	Guarantee Obligations Maximum Exposure GuaranteeObligationsMaximumExposure	58000000	USD
CY2017Q1	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	10000000	USD
CY2018Q1	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	USD
CY2017Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1192000000	USD
CY2018Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	702000000	USD
CY2017Q1	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-10000000	USD
CY2018Q1	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-7000000	USD
CY2017Q1	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-10000000	USD
CY2018Q1	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-7000000	USD
CY2017Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	211000000	USD
CY2018Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	59000000	USD
CY2017Q1	us-gaap	Increase Decrease Cash Collateral From Counterparties IncreaseDecreaseCashCollateralFromCounterparties	-110000000	USD
CY2018Q1	us-gaap	Increase Decrease Cash Collateral From Counterparties IncreaseDecreaseCashCollateralFromCounterparties	-214000000	USD
CY2017Q1	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-728000000	USD
CY2018Q1	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-451000000	USD
CY2017Q1	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	50000000	USD
CY2018Q1	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	86000000	USD
CY2017Q1	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-109000000	USD
CY2018Q1	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-167000000	USD
CY2017Q1	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	425000000	USD
CY2018Q1	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	495000000	USD
CY2017Q1	us-gaap	Increase Decrease In Pension Plan Obligations IncreaseDecreaseInPensionPlanObligations	23000000	USD
CY2017Q1	us-gaap	Increase Decrease In Postretirement Obligations IncreaseDecreaseInPostretirementObligations	14000000	USD
CY2017Q1	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-291000000	USD
CY2018Q1	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-133000000	USD
CY2017Q1	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	2000000	shares
CY2018Q1	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	2000000	shares
CY2017Q1	us-gaap	Interest Expense InterestExpense	363000000	USD
CY2018Q1	us-gaap	Interest Expense InterestExpense	365000000	USD
CY2017Q1	us-gaap	Interest Expense Related Party InterestExpenseRelatedParty	10000000	USD
CY2018Q1	us-gaap	Interest Expense Related Party InterestExpenseRelatedParty	6000000	USD
CY2017Q4	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	1311000000	USD
CY2018Q1	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	1291000000	USD
CY2017Q1	us-gaap	Inventory Write Down InventoryWriteDown	2000000	USD
CY2018Q1	us-gaap	Inventory Write Down InventoryWriteDown	13000000	USD
CY2017Q1	us-gaap	Investment Income Interest InvestmentIncomeInterest	2000000	USD
CY2018Q1	us-gaap	Investment Income Interest InvestmentIncomeInterest	4000000	USD
CY2017Q4	us-gaap	Liabilities Liabilities	84583000000	USD
CY2018Q1	us-gaap	Liabilities Liabilities	84453000000	USD
CY2017Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	116770000000	USD
CY2018Q1	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	117018000000	USD
CY2017Q4	us-gaap	Liabilities Current LiabilitiesCurrent	10798000000	USD
CY2018Q1	us-gaap	Liabilities Current LiabilitiesCurrent	10153000000	USD
CY2017Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	2088000000	USD
CY2018Q1	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	1203000000	USD
CY2017Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	32176000000	USD
CY2018Q1	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	32905000000	USD
CY2017Q4	us-gaap	Long Term Investments LongTermInvestments	640000000	USD
CY2018Q1	us-gaap	Long Term Investments LongTermInvestments	640000000	USD
CY2018Q1	us-gaap	Loss Contingency Loss In Period LossContingencyLossInPeriod	50000000	USD
CY2017Q4	us-gaap	Margin Deposit Assets MarginDepositAssets	117000000	USD
CY2018Q1	us-gaap	Margin Deposit Assets MarginDepositAssets	-156000000	USD
CY2017Q4	us-gaap	Minority Interest MinorityInterest	2291000000	USD
CY2018Q1	us-gaap	Minority Interest MinorityInterest	2334000000	USD
CY2018Q1	us-gaap	Minority Interest Period Increase Decrease MinorityInterestPeriodIncreaseDecrease	-9000000	USD
CY2017Q1	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	1184000000	USD
CY2018Q1	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	264000000	USD
CY2017Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2283000000	USD
CY2018Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1857000000	USD
CY2017Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1074000000	USD
CY2018Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1502000000	USD
CY2017Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	990000000	USD
CY2018Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	585000000	USD
CY2017Q1	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	10000000	USD
CY2017Q1	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-116000000	USD
CY2018Q1	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-399000000	USD
CY2018Q1	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	12	Reportable_segment
CY2017Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	1308000000	USD
CY2018Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	1101000000	USD
CY2017Q4	us-gaap	Other Assets Current OtherAssetsCurrent	1260000000	USD
CY2018Q1	us-gaap	Other Assets Current OtherAssetsCurrent	1495000000	USD
CY2017Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	1330000000	USD
CY2018Q1	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	1333000000	USD
CY2018Q1	us-gaap	Other Commitment OtherCommitment	3637000000	USD
CY2017Q1	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	1000000	USD
CY2018Q1	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	1000000	USD
CY2017Q1	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	-13000000	USD
CY2018Q1	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
CY2017Q1	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	1000000	USD
CY2018Q1	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	0	USD
CY2017Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-12000000	USD
CY2018Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	72000000	USD
CY2017Q1	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	59000000	USD
CY2018Q1	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-18000000	USD
CY2017Q1	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
CY2018Q1	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
CY2017Q1	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-28000000	USD
CY2018Q1	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-27000000	USD
CY2017Q1	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	6000000	USD
CY2018Q1	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	8000000	USD
CY2017Q1	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	896000000	USD
CY2018Q1	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	1091000000	USD
CY2017Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	982000000	USD
CY2018Q1	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	956000000	USD
CY2017Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	2097000000	USD
CY2018Q1	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	2067000000	USD
CY2017Q1	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-118000000	USD
CY2018Q1	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-240000000	USD
CY2017Q1	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	10000000	USD
CY2018Q1	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	5000000	USD
CY2017Q1	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	257000000	USD
CY2018Q1	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-28000000	USD
CY2017Q4	us-gaap	Other Postretirement Defined Benefit Plan Liabilities Noncurrent OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent	2093000000	USD
CY2018Q1	us-gaap	Other Postretirement Defined Benefit Plan Liabilities Noncurrent OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent	2114000000	USD
CY2017Q4	us-gaap	Other Receivables OtherReceivables	1132000000	USD
CY2018Q1	us-gaap	Other Receivables OtherReceivables	1103000000	USD
CY2017Q1	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	18000000	USD
CY2018Q1	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-3000000	USD
CY2017Q1	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	303000000	USD
CY2018Q1	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	333000000	USD
CY2017Q1	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	212000000	USD
CY2018Q1	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	0	USD
CY2017Q1	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	1833000000	USD
CY2018Q1	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	1248000000	USD
CY2017	us-gaap	Payments To Acquire Other Receivables PaymentsToAcquireOtherReceivables	298000000	USD
CY2018Q1	us-gaap	Payments To Acquire Other Receivables PaymentsToAcquireOtherReceivables	317000000	USD
CY2017Q1	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	2009000000	USD
CY2018Q1	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1880000000	USD
CY2017Q1	us-gaap	Pension And Other Postretirement Benefit Contributions PensionAndOtherPostretirementBenefitContributions	307000000	USD
CY2018Q1	us-gaap	Pension And Other Postretirement Benefit Contributions PensionAndOtherPostretirementBenefitContributions	331000000	USD
CY2017Q1	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	157000000	USD
CY2018Q1	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	145000000	USD
CY2017Q1	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	763000000	USD
CY2018Q1	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	1130000000	USD
CY2017Q1	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-4000000	USD
CY2018Q1	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-30000000	USD
CY2017Q1	us-gaap	Proceeds From Repayments Of Short Term Debt Maturing In Three Months Or Less ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess	721000000	USD
CY2018Q1	us-gaap	Proceeds From Repayments Of Short Term Debt Maturing In Three Months Or Less ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess	726000000	USD
CY2017Q1	us-gaap	Proceeds From Sale And Maturity Of Other Investments ProceedsFromSaleAndMaturityOfOtherInvestments	1767000000	USD
CY2018Q1	us-gaap	Proceeds From Sale And Maturity Of Other Investments ProceedsFromSaleAndMaturityOfOtherInvestments	1189000000	USD
CY2017Q1	us-gaap	Proceeds From Sale Of Property Held For Sale ProceedsFromSaleOfPropertyHeldForSale	22000000	USD
CY2018Q1	us-gaap	Proceeds From Sale Of Property Held For Sale ProceedsFromSaleOfPropertyHeldForSale	79000000	USD
CY2017Q1	us-gaap	Proceeds From Short Term Debt Maturing In More Than Three Months ProceedsFromShortTermDebtMaturingInMoreThanThreeMonths	560000000	USD
CY2018Q1	us-gaap	Proceeds From Short Term Debt Maturing In More Than Three Months ProceedsFromShortTermDebtMaturingInMoreThanThreeMonths	1000000	USD
CY2017Q1	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	12000000	USD
CY2018Q1	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	12000000	USD
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CY2018Q1	us-gaap	Profit Loss ProfitLoss	636000000	USD
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CY2018Q1	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	74711000000	USD
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CY2018Q1	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	64000000	USD
CY2017Q1	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	17000000	USD
CY2018Q1	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	18000000	USD
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CY2018Q1	us-gaap	Public Utilities Amount Of Allowance For Earnings On Equity Capitalized For Rate Making Purposes PublicUtilitiesAmountOfAllowanceForEarningsOnEquityCapitalizedForRateMakingPurposes	69000000	USD
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CY2018Q1	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-44000000	USD
CY2017Q1	us-gaap	Regulated Operating Revenue RegulatedOperatingRevenue	4118000000	USD
CY2018Q1	us-gaap	Regulated Operating Revenue RegulatedOperatingRevenue	4570000000	USD
CY2017Q4	us-gaap	Regulatory Assets RegulatoryAssets	9288000000	USD
CY2018Q1	us-gaap	Regulatory Assets RegulatoryAssets	9308000000	USD
CY2017Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	1267000000	USD
CY2018Q1	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	1245000000	USD
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CY2018Q1	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	8063000000	USD
CY2017Q4	us-gaap	Regulatory Liabilities RegulatoryLiabilities	10388000000	USD
CY2018Q1	us-gaap	Regulatory Liabilities RegulatoryLiabilities	10246000000	USD
CY2017Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	523000000	USD
CY2018Q1	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	522000000	USD
CY2017Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	9865000000	USD
CY2018Q1	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	9724000000	USD
CY2017Q1	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	65000000	USD
CY2018Q1	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	1241000000	USD
CY2017Q1	us-gaap	Repayments Of Short Term Debt Maturing In More Than Three Months RepaymentsOfShortTermDebtMaturingInMoreThanThreeMonths	500000000	USD
CY2018Q1	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
CY2017Q1	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	254000000	USD
CY2017Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	207000000	USD
CY2018Q1	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	209000000	USD
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CY2017Q1	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	26000000	USD
CY2017Q4	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	85000000	USD
CY2018Q1	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	103000000	USD
CY2017Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	14081000000	USD
CY2018Q1	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	14346000000	USD
CY2017Q1	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	79000000	USD
CY2018Q1	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	10000000	USD
CY2017Q1	us-gaap	Revenue From Related Parties RevenueFromRelatedParties	0	USD
CY2018Q1	us-gaap	Revenue From Related Parties RevenueFromRelatedParties	0	USD
CY2018Q1	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	544000000	USD
CY2018Q1	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	264000000	USD
CY2018Q1	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	104000000	USD
CY2018Q1	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	46000000	USD
CY2018Q1	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	128000000	USD
CY2018Q1	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	1086000000	USD
CY2017Q1	us-gaap	Revenues Revenues	8747000000	USD
CY2018Q1	us-gaap	Revenues Revenues	9693000000	USD
CY2017Q1	us-gaap	Severance Costs1 SeveranceCosts1	4000000	USD
CY2018Q1	us-gaap	Severance Costs1 SeveranceCosts1	8000000	USD
CY2017Q1	us-gaap	Share Based Compensation ShareBasedCompensation	31000000	USD
CY2018Q1	us-gaap	Share Based Compensation ShareBasedCompensation	29000000	USD
CY2017Q4	us-gaap	Shares Issued SharesIssued	965168000	shares
CY2018Q1	us-gaap	Shares Issued SharesIssued	967214000	shares
CY2017Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	929000000	USD
CY2018Q1	us-gaap	Short Term Borrowings ShortTermBorrowings	1654000000	USD
CY2017Q4	us-gaap	Spent Nuclear Fuel Obligation Noncurrent SpentNuclearFuelObligationNoncurrent	1147000000	USD
CY2018Q1	us-gaap	Spent Nuclear Fuel Obligation Noncurrent SpentNuclearFuelObligationNoncurrent	1151000000	USD
CY2017Q1	us-gaap	Stock Issued1 StockIssued1	2000000	USD
CY2018Q1	us-gaap	Stock Issued1 StockIssued1	1000000	USD
CY2018Q1	us-gaap	Stock Issued During Period Shares Employee Stock Purchase Plans StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	361000	shares
CY2018Q1	us-gaap	Stock Issued During Period Shares Share Based Compensation Gross StockIssuedDuringPeriodSharesShareBasedCompensationGross	1685000	shares
CY2018Q1	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	12000000	USD
CY2018Q1	us-gaap	Stock Issued During Period Value Share Based Compensation Gross StockIssuedDuringPeriodValueShareBasedCompensationGross	-3000000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	29896000000	USD
CY2018Q1	us-gaap	Stockholders Equity StockholdersEquity	30231000000	USD
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	32187000000	USD
CY2018Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	32565000000	USD
CY2017Q1	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	436000000	USD
CY2018Q1	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	446000000	USD
CY2017Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	1832457	shares
CY2018Q1	us-gaap	Treasury Stock Shares TreasuryStockShares	1832457	shares
CY2017Q4	us-gaap	Treasury Stock Value TreasuryStockValue	123000000	USD
CY2018Q1	us-gaap	Treasury Stock Value TreasuryStockValue	123000000	USD
CY2017Q1	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-47000000	USD
CY2018Q1	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-259000000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	743000000	USD
CY2018Q1	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	733000000	USD
CY2017Q1	us-gaap	Utilities Operating Expense Maintenance Operations And Other Costs And Expenses UtilitiesOperatingExpenseMaintenanceOperationsAndOtherCostsAndExpenses	2438000000	USD
CY2018Q1	us-gaap	Utilities Operating Expense Maintenance Operations And Other Costs And Expenses UtilitiesOperatingExpenseMaintenanceOperationsAndOtherCostsAndExpenses	2384000000	USD
CY2017Q1	us-gaap	Utilities Operating Expense Taxes UtilitiesOperatingExpenseTaxes	224000000	USD
CY2018Q1	us-gaap	Utilities Operating Expense Taxes UtilitiesOperatingExpenseTaxes	235000000	USD
CY2017Q4	us-gaap	Variable Interest Entity Consolidated Assets Current VariableInterestEntityConsolidatedAssetsCurrent	662000000	USD
CY2018Q1	us-gaap	Variable Interest Entity Consolidated Assets Current VariableInterestEntityConsolidatedAssetsCurrent	823000000	USD
CY2017Q4	us-gaap	Variable Interest Entity Consolidated Assets Noncurrent VariableInterestEntityConsolidatedAssetsNoncurrent	9317000000	USD
CY2018Q1	us-gaap	Variable Interest Entity Consolidated Assets Noncurrent VariableInterestEntityConsolidatedAssetsNoncurrent	9279000000	USD
CY2017Q4	us-gaap	Variable Interest Entity Consolidated Assets Not Pledged VariableInterestEntityConsolidatedAssetsNotPledged	9597000000	USD
CY2018Q1	us-gaap	Variable Interest Entity Consolidated Assets Not Pledged VariableInterestEntityConsolidatedAssetsNotPledged	9727000000	USD
CY2017Q4	us-gaap	Variable Interest Entity Consolidated Carrying Amount Assets VariableInterestEntityConsolidatedCarryingAmountAssets	9979000000	USD
CY2018Q1	us-gaap	Variable Interest Entity Consolidated Carrying Amount Assets VariableInterestEntityConsolidatedCarryingAmountAssets	10102000000	USD
CY2017Q4	us-gaap	Variable Interest Entity Consolidated Carrying Amount Liabilities VariableInterestEntityConsolidatedCarryingAmountLiabilities	3624000000	USD
CY2018Q1	us-gaap	Variable Interest Entity Consolidated Carrying Amount Liabilities VariableInterestEntityConsolidatedCarryingAmountLiabilities	3561000000	USD
CY2017Q4	us-gaap	Variable Interest Entity Consolidated Liabilities Current VariableInterestEntityConsolidatedLiabilitiesCurrent	308000000	USD
CY2018Q1	us-gaap	Variable Interest Entity Consolidated Liabilities Current VariableInterestEntityConsolidatedLiabilitiesCurrent	269000000	USD
CY2017Q4	us-gaap	Variable Interest Entity Consolidated Liabilities No Recourse VariableInterestEntityConsolidatedLiabilitiesNoRecourse	3618000000	USD
CY2018Q1	us-gaap	Variable Interest Entity Consolidated Liabilities No Recourse VariableInterestEntityConsolidatedLiabilitiesNoRecourse	3556000000	USD
CY2017Q4	us-gaap	Variable Interest Entity Consolidated Liabilities Noncurrent VariableInterestEntityConsolidatedLiabilitiesNoncurrent	3316000000	USD
CY2018Q1	us-gaap	Variable Interest Entity Consolidated Liabilities Noncurrent VariableInterestEntityConsolidatedLiabilitiesNoncurrent	3292000000	USD
CY2018Q1	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
CY2018Q1	us-gaap	Variable Interest Entity Nonconsolidated Carrying Amount Assets VariableInterestEntityNonconsolidatedCarryingAmountAssets	1127000000	USD
CY2017Q4	us-gaap	Variable Interest Entity Nonconsolidated Carrying Amount Liabilities VariableInterestEntityNonconsolidatedCarryingAmountLiabilities	265000000	USD
CY2018Q1	us-gaap	Variable Interest Entity Nonconsolidated Carrying Amount Liabilities VariableInterestEntityNonconsolidatedCarryingAmountLiabilities	262000000	USD
CY2017Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	930000000	shares
CY2018Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	968000000	shares
CY2017Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	928000000	shares
CY2018Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	966000000	shares
CY2018Q1	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 March 31, 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 March 31, 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 January 2018, the FASB proposed amending the standard to give entities another option for transition. The proposed transition method would allow entities to initially apply the requirements of the standard in the period of adoption (January 1, 2019). The Registrants will assess this transition option when the FASB issues the standard.</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 which includes completing a detailed contract assessment for a sample of transactions to determine whether they are leases under the new 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 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;">March 31, 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>
CY2018Q1	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:left;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:48px;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;font-weight:bold;"></font><font style="font-family:Arial;font-size:10pt;">In the second quarter of 2017, errors were identified related to the Exelon, Generation, ComEd, PECO and BGE Consolidated Statements of Cash Flows for the three months ended March 31, 2017. These classification errors related to the presentation of changes in Accounts payable and accrued expenses and Accounts receivable within Cash flows provided by operating activities and Capital expenditures and Proceeds from sale of long-lived assets within Cash flows used in investing activities. These errors have been corrected in Exelon's, Generation's, ComEd's, PECO's, and BGE's Consolidated Statements of Cash Flows for the three months ended March 31, 2017 that are presented in this first quarter 2018 Form 10-Q. As revised, the Cash flows provided by operating activities for the three months ended March 31, 2017 are </font><font style="font-family:Arial;font-size:10pt;">$1,074 million</font><font style="font-family:Arial;font-size:10pt;">, </font><font style="font-family:Arial;font-size:10pt;">$420 million</font><font style="font-family:Arial;font-size:10pt;">, </font><font style="font-family:Arial;font-size:10pt;">$236 million</font><font style="font-family:Arial;font-size:10pt;">, </font><font style="font-family:Arial;font-size:10pt;">$106 million</font><font style="font-family:Arial;font-size:10pt;"> and </font><font style="font-family:Arial;font-size:10pt;">$208 million</font><font style="font-family:Arial;font-size:10pt;"> for Exelon, Generation, ComEd, PECO and BGE, respectively, an increase (decrease) of </font><font style="font-family:Arial;font-size:10pt;">$(127) million</font><font style="font-family:Arial;font-size:10pt;">, </font><font style="font-family:Arial;font-size:10pt;">$(320) million</font><font style="font-family:Arial;font-size:10pt;">, </font><font style="font-family:Arial;font-size:10pt;">$91 million</font><font style="font-family:Arial;font-size:10pt;">, </font><font style="font-family:Arial;font-size:10pt;">$42 million</font><font style="font-family:Arial;font-size:10pt;"> and </font><font style="font-family:Arial;font-size:10pt;">$40 million</font><font style="font-family:Arial;font-size:10pt;"> for Exelon, Generation, ComEd, PECO and BGE, respectively, from the originally reported amounts. As revised, the Cash flows used in investing activities are </font><font style="font-family:Arial;font-size:10pt;">$2,283 million</font><font style="font-family:Arial;font-size:10pt;">, </font><font style="font-family:Arial;font-size:10pt;">$910 million</font><font style="font-family:Arial;font-size:10pt;">, </font><font style="font-family:Arial;font-size:10pt;">$619 million</font><font style="font-family:Arial;font-size:10pt;">, </font><font style="font-family:Arial;font-size:10pt;">$69 million</font><font style="font-family:Arial;font-size:10pt;"> and </font><font style="font-family:Arial;font-size:10pt;">$202 million</font><font style="font-family:Arial;font-size:10pt;"> for Exelon, Generation, ComEd, PECO and BGE, respectively, an increase (decrease) of </font><font style="font-family:Arial;font-size:10pt;">$(127) million</font><font style="font-family:Arial;font-size:10pt;">, </font><font style="font-family:Arial;font-size:10pt;">$(320) million</font><font style="font-family:Arial;font-size:10pt;">, </font><font style="font-family:Arial;font-size:10pt;">$91 million</font><font style="font-family:Arial;font-size:10pt;">, </font><font style="font-family:Arial;font-size:10pt;">$42 million</font><font style="font-family:Arial;font-size:10pt;"> and </font><font style="font-family:Arial;font-size:10pt;">$40 million</font><font style="font-family:Arial;font-size:10pt;"> for Exelon, Generation, ComEd, PECO and BGE, respectively, from the originally reported amounts. Management concluded that the errors are not material to the previously issued financial statements. </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 Income, 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:32px;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;">Supplemental Financial Information</font><font style="font-family:Arial;font-size:10pt;"> for further information.  </font><font style="font-family:inherit;font-size:11pt;color:#1f497d;"> </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 further information.  </font><font style="font-family:inherit;font-size:11pt;color:#1f497d;"> </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;">Retirement Benefits</font><font style="font-family:Arial;font-size:10pt;"> for further 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;">Revenue from Contracts with Customers </font><font style="font-family:Arial;font-size:10pt;">for further information.</font><font style="font-family:inherit;font-size:11pt;color:#1f497d;"> </font></div></td></tr></table></div>

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$EXC
EXELON CORP Stock $exc

2018 Q1 Form 10-Q Financial Statement

#000162828018005662 Filed on May 02, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$EXC EXELON CORP Stock $exc

2018 Q1 Form 10-Q Financial Statement

#000162828018005662 Filed on May 02, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$EXC
EXELON CORP Stock $exc