$EXC
EXELON CORP Stock $exc

$exc Overview Financials Valuation SEC Filings Company Website

2013 Q1 Form 10-Q Financial Statement

#000119312513211545 Filed on May 10, 2013

Income Statement

Concept	2013 Q1	2012 Q1
Revenue	$6.082B	$4.690B
YoY Change	29.68%	-5.37%
Cost Of Revenue	$2.981B	$1.765B
YoY Change	68.9%	-11.75%
Gross Profit	$3.101B	$2.925B
YoY Change	6.02%	-1.02%
Gross Profit Margin	50.99%	62.37%
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$471.0M	$354.0M
YoY Change	33.05%	13.1%
% of Gross Profit	15.19%	12.1%
Operating Expenses	$2.584B	$2.544B
YoY Change	1.57%	45.12%
Operating Profit	$508.0M	$359.0M
YoY Change	41.5%	-70.13%
Interest Expense	$617.0M	$189.0M
YoY Change	226.46%	8.0%
% of Operating Profit	121.46%	52.65%
Other Income/Expense, Net	-$451.0M	-$1.000M
YoY Change	45000.0%	-98.85%
Pretax Income	$57.00M	$358.0M
YoY Change	-84.08%	-67.89%
Income Tax	$56.00M	$158.0M
% Of Pretax Income	98.25%	44.13%
Net Earnings	-$4.000M	$200.0M
YoY Change	-102.0%	-70.06%
Net Earnings / Revenue	-0.07%	4.26%
Basic Earnings Per Share	-$0.01	$0.28
Diluted Earnings Per Share	-$0.01	$0.28
COMMON SHARES
Basic Shares Outstanding	855.0M shares	705.0M shares
Diluted Shares Outstanding	855.0M shares	707.0M shares

Balance Sheet

Concept	2013 Q1	2012 Q1
SHORT-TERM ASSETS
Cash & Short-Term Investments	$772.0M	$721.0M
YoY Change	7.07%	48.05%
Cash & Equivalents	$772.0M	$721.0M
Short-Term Investments
Other Short-Term Assets	$722.0M	$5.704B
YoY Change	-87.34%	1208.26%
Inventory	$913.0M	$942.0M
Prepaid Expenses
Receivables	$2.835B	$3.109B
Other Receivables	$1.110B	$1.339B
Total Short-Term Assets	$9.274B	$11.82B
YoY Change	-21.51%	153.6%
LONG-TERM ASSETS
Property, Plant & Equipment	$45.78B	$42.11B
YoY Change	8.74%	37.83%
Goodwill	$2.625B
YoY Change
Intangibles
YoY Change
Long-Term Investments	$3.086B	$3.235B
YoY Change	-4.61%	337.16%
Other Assets	$1.140B	$17.85B
YoY Change	-93.61%	2230.03%
Total Long-Term Assets	$70.65B	$65.81B
YoY Change	7.35%	40.88%
TOTAL ASSETS
Total Short-Term Assets	$9.274B	$11.82B
Total Long-Term Assets	$70.65B	$65.81B
Total Assets	$79.92B	$77.63B
YoY Change	2.96%	51.1%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$2.198B	$2.263B
YoY Change	-2.87%	70.02%
Accrued Expenses	$1.430B	$1.492B
YoY Change	-4.16%	75.12%
Deferred Revenue
YoY Change
Short-Term Debt	$233.0M	$564.0M
YoY Change	-58.69%	1028.0%
Long-Term Debt Due	$2.164B	$735.0M
YoY Change	194.42%	-29.93%
Total Short-Term Liabilities	$8.321B	$9.052B
YoY Change	-8.08%	117.02%
LONG-TERM LIABILITIES
Long-Term Debt	$16.21B	$450.0M
YoY Change	3502.22%	-96.17%
Other Long-Term Liabilities	$2.625B	$18.22B
YoY Change	-85.6%	1570.39%
Total Long-Term Liabilities	$18.84B	$450.0M
YoY Change	4085.56%	-96.5%
TOTAL LIABILITIES
Total Short-Term Liabilities	$8.321B	$9.052B
Total Long-Term Liabilities	$18.84B	$450.0M
Total Liabilities	$56.83B	$55.62B
YoY Change	2.18%	48.89%
SHAREHOLDERS EQUITY
Retained Earnings	$9.437B
YoY Change
Common Stock	$16.65B
YoY Change
Preferred Stock
YoY Change
Treasury Stock (at cost)	$2.327B	$2.327B
YoY Change	0.0%	0.0%
Treasury Stock Shares	35.00M shares
Shareholders Equity	$21.09B	$22.01B
YoY Change
Total Liabilities & Shareholders Equity	$78.24B	$77.63B
YoY Change	0.79%	51.1%

Cashflow Statement

Concept	2013 Q1	2012 Q1
OPERATING ACTIVITIES
Net Income	-$4.000M	$200.0M
YoY Change	-102.0%	-70.06%
Depreciation, Depletion And Amortization	$471.0M	$354.0M
YoY Change	33.05%	13.1%
Cash From Operating Activities	$859.0M	$994.0M
YoY Change	-13.58%	-580.19%
INVESTING ACTIVITIES
Capital Expenditures	$1.447B	$1.496B
YoY Change	-3.28%	30.09%
Acquisitions
YoY Change
Other Investing Activities	-$40.00M	$54.00M
YoY Change	-174.07%	-460.0%
Cash From Investing Activities	-$1.471B	-$640.0M
YoY Change	129.84%	-45.72%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net	$1.000M	$451.0M
YoY Change	-99.78%	45000.0%
Cash From Financing Activities	-$102.0M	-$649.0M
YoY Change	-84.28%	-348.66%
NET CHANGE
Cash From Operating Activities	$859.0M	$994.0M
Cash From Investing Activities	-$1.471B	-$640.0M
Cash From Financing Activities	-$102.0M	-$649.0M
Net Change In Cash	-$714.0M	-$295.0M
YoY Change	142.03%	-73.78%
FREE CASH FLOW
Cash From Operating Activities	$859.0M	$994.0M
Capital Expenditures	$1.447B	$1.496B
Free Cash Flow	-$588.0M	-$502.0M
YoY Change	17.13%	-63.01%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2013Q1	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.53
CY2012Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	45186000000	USD
CY2013Q1	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	277000000	USD
CY2013Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	57000000	USD
CY2013Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	56000000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-58000000	USD
CY2012Q1	us-gaap	Revenues Revenues	4690000000	USD
CY2012Q1	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	194000000	USD
CY2012Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	358000000	USD
CY2012Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	158000000	USD
CY2012Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	707000000	shares
CY2012Q1	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	776000000	USD
CY2012Q1	exc	Changes In Option Premiums Collected Received ChangesInOptionPremiumsCollectedReceived	100000000	USD
CY2012Q1	exc	Increase Decrease In Counterparty Collateral Net IncreaseDecreaseInCounterpartyCollateralNet	-340000000	USD
CY2012Q1	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	178000000	USD
CY2012Q4	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	768000000	USD
CY2012Q4	us-gaap	Assets Current AssetsCurrent	10140000000	USD
CY2012Q4	us-gaap	Long Term Investments LongTermInvestments	1184000000	USD
CY2012Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	22000000	USD
CY2013Q1	us-gaap	Revenues Revenues	6082000000	USD
CY2012Q1	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	382000000	USD
CY2013Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	508000000	USD
CY2012Q1	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	1968000000	USD
CY2012Q1	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	194000000	USD
CY2012Q1	us-gaap	Costs And Expenses CostsAndExpenses	4309000000	USD
CY2013Q1	exc	Interest Expense To Affiliates Net InterestExpenseToAffiliatesNet	6000000	USD
CY2012Q1	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-1000000	USD
CY2012Q1	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	215000000	USD
CY2012Q1	exc	Interest Expense To Affiliates Net InterestExpenseToAffiliatesNet	6000000	USD
CY2012Q4	exc	Investments In Nonconsolidated Variable Interest Entities InvestmentsInNonconsolidatedVariableInterestEntities	97000000	USD
CY2012Q1	exc	Other Comprehensive Income Pension And Non Pension Postretirement Benefit Plan Valuation Adjustment Net Of Tax OtherComprehensiveIncomePensionAndNonPensionPostretirementBenefitPlanValuationAdjustmentNetOfTax	8000000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Reclassification Of Defined Benefit Plans Net Gain Loss Recognized In Net Periodic Benefit Cost Net Of Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainLossRecognizedInNetPeriodicBenefitCostNetOfTax	51000000	USD
CY2012Q1	us-gaap	Other Comprehensive Income Reclassification Of Defined Benefit Plans Net Gain Loss Recognized In Net Periodic Benefit Cost Net Of Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainLossRecognizedInNetPeriodicBenefitCostNetOfTax	41000000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Reclassification Of Defined Benefit Plan Net Transition Asset Obligation Recognized In Net Periodic Benefit Cost Net Of Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlanNetTransitionAssetObligationRecognizedInNetPeriodicBenefitCostNetOfTax	0	USD
CY2012Q1	us-gaap	Other Comprehensive Income Reclassification Of Defined Benefit Plan Net Transition Asset Obligation Recognized In Net Periodic Benefit Cost Net Of Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlanNetTransitionAssetObligationRecognizedInNetPeriodicBenefitCostNetOfTax	1000000	USD
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CY2013Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	855000000	shares
CY2013Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	855000000	shares
CY2013Q1	exc	Income Loss From Operating Equity Method Investments IncomeLossFromOperatingEquityMethodInvestments	-9000000	USD
CY2012Q1	exc	Income Loss From Operating Equity Method Investments IncomeLossFromOperatingEquityMethodInvestments	-22000000	USD
CY2012Q1	us-gaap	Profit Loss ProfitLoss	200000000	USD
CY2013Q1	us-gaap	Profit Loss ProfitLoss	1000000	USD
CY2013Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-4000000	USD
CY2012Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	200000000	USD
CY2012Q1	us-gaap	Cost Of Goods And Services Energy Commodities And Services CostOfGoodsAndServicesEnergyCommoditiesAndServices	1765000000	USD
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CY2012Q1	exc	Net Income Loss Attributable To Noncontrolling Interest And Preferred Stock Dividends And Other Adjustments NetIncomeLossAttributableToNoncontrollingInterestAndPreferredStockDividendsAndOtherAdjustments	0	USD
CY2013Q1	exc	Cost Of Purchased Power Affiliate CostOfPurchasedPowerAffiliate	0	USD
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CY2013Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	94000000	USD
CY2012Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	251000000	USD
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CY2013Q1	exc	Other Comprehensive Income Unrealized Income Loss On Equity Investments Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedIncomeLossOnEquityInvestmentsArisingDuringPeriodNetOfTax	28000000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	-1000000	USD
CY2013Q1	dei	Entity Registrant Name EntityRegistrantName	EXELON CORP
CY2013Q1	dei	Entity Central Index Key EntityCentralIndexKey	0001109357
CY2013Q1	dei	Document Type DocumentType	10-Q
CY2013Q1	dei	Document Period End Date DocumentPeriodEndDate	2013-03-31
CY2013Q1	dei	Amendment Flag AmendmentFlag	false
CY2013Q1	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2013
CY2013Q1	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2013Q1	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2013Q1	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2013Q1	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2013Q1	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2013Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	855849302	shares
CY2013Q1	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q2
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CY2012Q1	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	122000000	USD
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CY2012Q1	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1496000000	USD
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CY2012Q1	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-295000000	USD
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CY2013Q1	exc	Changes In Option Premiums Collected Received ChangesInOptionPremiumsCollectedReceived	3000000	USD
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CY2013Q1	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	632000000	USD
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CY2012Q4	exc	Total Deferred Debits And Other Assets TotalDeferredDebitsAndOtherAssets	23235000000	USD
CY2012Q4	us-gaap	Assets Assets	78561000000	USD
CY2013Q1	exc	Cash And Cash Equivalents Nonvariable Interest Entity CashAndCashEquivalentsNonvariableInterestEntity	679000000	USD
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CY2013Q1	us-gaap	Energy Related Inventory Other Fossil Fuel EnergyRelatedInventoryOtherFossilFuel	122000000	USD
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CY2013Q1	us-gaap	Other Assets Current OtherAssetsCurrent	722000000	USD
CY2013Q1	us-gaap	Assets Current AssetsCurrent	9274000000	USD
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CY2013Q1	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	22000000	USD
CY2013Q1	us-gaap	Goodwill Goodwill	2625000000	USD
CY2013Q1	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	1140000000	USD
CY2013Q1	exc	Total Deferred Debits And Other Assets TotalDeferredDebitsAndOtherAssets	23185000000	USD
CY2013Q1	us-gaap	Assets Assets	78243000000	USD
CY2013Q1	us-gaap	Pledged Assets Not Separately Reported Finance Receivables PledgedAssetsNotSeparatelyReportedFinanceReceivables	322000000	USD
CY2013Q1	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	6521000000	USD
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CY2013Q1	us-gaap	Decommissioning Fund Investments DecommissioningFundInvestments	7559000000	USD
CY2012Q4	us-gaap	Decommissioning Fund Investments DecommissioningFundInvestments	7248000000	USD
CY2013Q1	us-gaap	Assets Held In Trust Noncurrent AssetsHeldInTrustNoncurrent	580000000	USD
CY2012Q4	us-gaap	Assets Held In Trust Noncurrent AssetsHeldInTrustNoncurrent	614000000	USD
CY2012Q4	us-gaap	Pledged Assets Not Separately Reported Finance Receivables PledgedAssetsNotSeparatelyReportedFinanceReceivables	289000000	USD
CY2013Q1	us-gaap	Deferred Tax Assets Net Current DeferredTaxAssetsNetCurrent	331000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Net Current DeferredTaxAssetsNetCurrent	131000000	USD
CY2013Q1	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	765000000	USD
CY2013Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.01
CY2013Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-1000000	USD
CY2012Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	764000000	USD
CY2013Q1	exc	Investment In Ceng InvestmentInCeng	1883000000	USD
CY2012Q4	exc	Investment In Ceng InvestmentInCeng	1849000000	USD
CY2013Q1	exc	Restricted Cash Variable Interest Entity RestrictedCashVariableInterestEntity	65000000	USD
CY2013Q1	exc	Accounts Receivable Of Variable Interest Entities AccountsReceivableOfVariableInterestEntities	285000000	USD
CY2013Q1	exc	Unamortized Energy Contract Assets Current UnamortizedEnergyContractAssetsCurrent	727000000	USD
CY2012Q4	exc	Unamortized Energy Contract Assets Current UnamortizedEnergyContractAssetsCurrent	886000000	USD
CY2013Q1	exc	Unamortized Energy Contract Assets Noncurrent UnamortizedEnergyContractAssetsNoncurrent	968000000	USD
CY2012Q4	exc	Unamortized Energy Contract Assets Noncurrent UnamortizedEnergyContractAssetsNoncurrent	1073000000	USD
CY2013Q1	exc	Cash And Cash Equivalent Variable Interest Entity CashAndCashEquivalentVariableInterestEntity	93000000	USD
CY2012Q4	exc	Accounts Receivable Of Variable Interest Entities AccountsReceivableOfVariableInterestEntities	292000000	USD
CY2012Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	938000000	USD
CY2013Q1	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	666000000	USD
CY2013Q1	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	706000000	USD
CY2012Q4	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	937000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	0	USD
CY2013Q1	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	0	USD
CY2012Q4	exc	Cash And Cash Equivalent Variable Interest Entity CashAndCashEquivalentVariableInterestEntity	75000000	USD
CY2012Q4	exc	Restricted Cash Variable Interest Entity RestrictedCashVariableInterestEntity	47000000	USD
CY2012Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	0	USD
CY2012Q4	us-gaap	Other Notes Payable Current OtherNotesPayableCurrent	210000000	USD
CY2012Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	2446000000	USD
CY2012Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	1800000000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Current DeferredTaxLiabilitiesCurrent	58000000	USD
CY2012Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	849000000	USD
CY2012Q4	us-gaap	Liabilities Current LiabilitiesCurrent	7791000000	USD
CY2012Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	17190000000	USD
CY2012Q4	us-gaap	Due To Related Parties Noncurrent DueToRelatedPartiesNoncurrent	648000000	USD
CY2012Q4	exc	Deferred Income Taxes And Unamortized Investment Tax Credits DeferredIncomeTaxesAndUnamortizedInvestmentTaxCredits	11551000000	USD
CY2012Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	5074000000	USD
CY2012Q4	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	3428000000	USD
CY2012Q4	us-gaap	Other Postretirement Defined Benefit Plan Liabilities Noncurrent OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent	2662000000	USD
CY2012Q4	us-gaap	Spent Nuclear Fuel Obligation Noncurrent SpentNuclearFuelObligationNoncurrent	1020000000	USD
CY2012Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	1650000000	USD
CY2012Q4	exc	Total Deferred Credits And Other Liabilities TotalDeferredCreditsAndOtherLiabilities	30607000000	USD
CY2012Q4	us-gaap	Liabilities Liabilities	56744000000	USD
CY2012Q4	us-gaap	Common Stock Value CommonStockValue	16632000000	USD
CY2012Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	9893000000	USD
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-2767000000	USD
CY2012Q4	us-gaap	Stockholders Equity StockholdersEquity	21431000000	USD
CY2013Q1	us-gaap	Short Term Borrowings ShortTermBorrowings	233000000	USD
CY2013Q1	us-gaap	Other Notes Payable Current OtherNotesPayableCurrent	210000000	USD
CY2013Q1	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	2085000000	USD
CY2013Q1	us-gaap	Accounts Payable Current AccountsPayableCurrent	2198000000	USD
CY2013Q1	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	1430000000	USD
CY2013Q1	us-gaap	Deferred Tax Liabilities Current DeferredTaxLiabilitiesCurrent	29000000	USD
CY2013Q1	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	859000000	USD
CY2013Q1	us-gaap	Liabilities Current LiabilitiesCurrent	8321000000	USD
CY2013Q1	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	16210000000	USD
CY2013Q1	us-gaap	Due To Related Parties Noncurrent DueToRelatedPartiesNoncurrent	648000000	USD
CY2013Q1	exc	Deferred Income Taxes And Unamortized Investment Tax Credits DeferredIncomeTaxesAndUnamortizedInvestmentTaxCredits	11315000000	USD
CY2013Q1	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	5149000000	USD
CY2013Q1	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	3161000000	USD
CY2013Q1	us-gaap	Other Postretirement Defined Benefit Plan Liabilities Noncurrent OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent	2672000000	USD
CY2013Q1	us-gaap	Spent Nuclear Fuel Obligation Noncurrent SpentNuclearFuelObligationNoncurrent	1020000000	USD
CY2013Q1	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	2625000000	USD
CY2013Q1	exc	Total Deferred Credits And Other Liabilities TotalDeferredCreditsAndOtherLiabilities	31154000000	USD
CY2013Q1	us-gaap	Liabilities Liabilities	56830000000	USD
CY2013Q1	us-gaap	Common Stock Value CommonStockValue	16652000000	USD
CY2013Q1	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	9437000000	USD
CY2013Q1	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-2673000000	USD
CY2013Q1	us-gaap	Stockholders Equity StockholdersEquity	21089000000	USD
CY2012Q4	us-gaap	Common Stock No Par Value CommonStockNoParValue
CY2012Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	2000000000	shares
CY2013Q1	us-gaap	Common Stock No Par Value CommonStockNoParValue
CY2013Q1	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	2000000000	shares
CY2013Q1	us-gaap	Treasury Stock Shares TreasuryStockShares	35000000	shares
CY2013Q1	us-gaap	Treasury Stock Value TreasuryStockValue	2327000000	USD
CY2013Q1	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	4115000000	USD
CY2012Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	3981000000	USD
CY2013Q1	us-gaap	Minority Interest MinorityInterest	44000000	USD
CY2012Q4	us-gaap	Minority Interest MinorityInterest	106000000	USD
CY2013Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	21326000000	USD
CY2012Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	21730000000	USD
CY2013Q1	exc	Payable To Zionsolutions PayableToZionsolutions	372000000	USD
CY2012Q4	exc	Payable To Zionsolutions PayableToZionsolutions	432000000	USD
CY2013Q1	exc	Long Term Debt Consolidated Variable Interest Entities Current LongTermDebtConsolidatedVariableInterestEntitiesCurrent	79000000	USD
CY2012Q4	exc	Long Term Debt Consolidated Variable Interest Entities Current LongTermDebtConsolidatedVariableInterestEntitiesCurrent	72000000	USD
CY2012Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	4000000	USD
CY2013Q1	us-gaap	Dividends Payable Current DividendsPayableCurrent	1000000	USD
CY2013Q1	exc	Accounts Payable Variable Interest Entities AccountsPayableVariableInterestEntities	188000000	USD
CY2012Q4	exc	Accounts Payable Variable Interest Entities AccountsPayableVariableInterestEntities	202000000	USD
CY2012Q4	us-gaap	Treasury Stock Value TreasuryStockValue	2327000000	USD
CY2013Q1	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2012Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2013Q1	exc	Unamortized Energy Contract Liabilities Current UnamortizedEnergyContractLiabilitiesCurrent	410000000	USD
CY2012Q4	exc	Unamortized Energy Contract Liabilities Current UnamortizedEnergyContractLiabilitiesCurrent	455000000	USD
CY2012Q4	exc	Long Term Debt Consolidated Variable Interest Entities Noncurrent LongTermDebtConsolidatedVariableInterestEntitiesNoncurrent	508000000	USD
CY2013Q1	exc	Long Term Debt Consolidated Variable Interest Entities Noncurrent LongTermDebtConsolidatedVariableInterestEntitiesNoncurrent	497000000	USD
CY2013Q1	exc	Unamortized Energy Contract Liabilities Noncurrent UnamortizedEnergyContractLiabilitiesNoncurrent	466000000	USD
CY2012Q4	exc	Unamortized Energy Contract Liabilities Noncurrent UnamortizedEnergyContractLiabilitiesNoncurrent	528000000	USD
CY2012Q4	us-gaap	Preferred Stock Value PreferredStockValue	193000000	USD
CY2013Q1	us-gaap	Preferred Stock Value PreferredStockValue	193000000	USD
CY2013Q1	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	855849302	shares
CY2012Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	855000000	shares
CY2013Q1	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	418000000	USD
CY2012Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	368000000	USD
CY2013Q1	exc	Liabilities And Stockholders Equity Including Portion Attributable To Noncontrolling Interest LiabilitiesAndStockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	78243000000	USD
CY2012Q4	exc	Liabilities And Stockholders Equity Including Portion Attributable To Noncontrolling Interest LiabilitiesAndStockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	78561000000	USD
CY2013Q1	us-gaap	Temporary Equity Carrying Amount Attributable To Noncontrolling Interest TemporaryEquityCarryingAmountAttributableToNoncontrollingInterest	87000000	USD
CY2012Q4	us-gaap	Temporary Equity Carrying Amount Attributable To Noncontrolling Interest TemporaryEquityCarryingAmountAttributableToNoncontrollingInterest	87000000	USD
CY2013Q1	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	181000000	USD
CY2012Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	352000000	USD
CY2012Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	281000000	USD
CY2013Q1	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	259000000	USD
CY2012Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	35000000	shares
CY2013Q1	exc	Stock Issued During Period Value Long Term Incentive Plan Activity StockIssuedDuringPeriodValueLongTermIncentivePlanActivity	20000000	USD
CY2013Q1	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	452000000	USD
CY2013Q1	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions		USD
CY2013Q1	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	4000000	USD
CY2013Q1	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	63000000	USD
CY2013Q1	exc	Variable Interest Entity Consolidated Carrying Amount Assets Current VariableInterestEntityConsolidatedCarryingAmountAssetsCurrent	551000000	USD
CY2013Q1	exc	Variable Interest Entity Consolidated Carrying Amount Assets Noncurrent VariableInterestEntityConsolidatedCarryingAmountAssetsNoncurrent	1947000000	USD
CY2013Q1	us-gaap	Variable Interest Entity Consolidated Carrying Amount Assets VariableInterestEntityConsolidatedCarryingAmountAssets	2498000000	USD
CY2013Q1	exc	Variable Interest Entity Consolidated Carrying Amount Liabilities Current VariableInterestEntityConsolidatedCarryingAmountLiabilitiesCurrent	575000000	USD
CY2013Q1	exc	Variable Interest Entity Consolidated Carrying Amount Liabilities Noncurrent VariableInterestEntityConsolidatedCarryingAmountLiabilitiesNoncurrent	986000000	USD
CY2013Q1	us-gaap	Variable Interest Entity Consolidated Carrying Amount Liabilities VariableInterestEntityConsolidatedCarryingAmountLiabilities	1561000000	USD
CY2012Q4	exc	Variable Interest Entity Consolidated Carrying Amount Assets Current VariableInterestEntityConsolidatedCarryingAmountAssetsCurrent	550000000	USD
CY2012Q4	exc	Variable Interest Entity Consolidated Carrying Amount Assets Noncurrent VariableInterestEntityConsolidatedCarryingAmountAssetsNoncurrent	1802000000	USD
CY2012Q4	us-gaap	Variable Interest Entity Consolidated Carrying Amount Assets VariableInterestEntityConsolidatedCarryingAmountAssets	2352000000	USD
CY2012Q4	exc	Variable Interest Entity Consolidated Carrying Amount Liabilities Current VariableInterestEntityConsolidatedCarryingAmountLiabilitiesCurrent	685000000	USD
CY2012Q4	exc	Variable Interest Entity Consolidated Carrying Amount Liabilities Noncurrent VariableInterestEntityConsolidatedCarryingAmountLiabilitiesNoncurrent	837000000	USD
CY2012Q4	us-gaap	Variable Interest Entity Consolidated Carrying Amount Liabilities VariableInterestEntityConsolidatedCarryingAmountLiabilities	1522000000	USD
CY2013Q1	us-gaap	Variable Interest Entity Nonconsolidated Carrying Amount Assets VariableInterestEntityNonconsolidatedCarryingAmountAssets	698000000	USD
CY2013Q1	us-gaap	Variable Interest Entity Nonconsolidated Carrying Amount Liabilities VariableInterestEntityNonconsolidatedCarryingAmountLiabilities	281000000	USD
CY2013Q1	exc	Investments In Nonconsolidated Variable Interest Entities InvestmentsInNonconsolidatedVariableInterestEntities	98000000	USD
CY2013Q1	exc	Other Nonconsolidated Variable Interest Entity Ownership Interests OtherNonconsolidatedVariableInterestEntityOwnershipInterests	319000000	USD
CY2012Q4	us-gaap	Variable Interest Entity Nonconsolidated Carrying Amount Assets VariableInterestEntityNonconsolidatedCarryingAmountAssets	740000000	USD
CY2012Q4	us-gaap	Variable Interest Entity Nonconsolidated Carrying Amount Liabilities VariableInterestEntityNonconsolidatedCarryingAmountLiabilities	333000000	USD
CY2012Q4	exc	Other Nonconsolidated Variable Interest Entity Ownership Interests OtherNonconsolidatedVariableInterestEntityOwnershipInterests	310000000	USD
CY2012Q4	us-gaap	Pledged Assets Separately Reported Other Assets Pledged As Collateral At Fair Value PledgedAssetsSeparatelyReportedOtherAssetsPledgedAsCollateralAtFairValue	614000000	USD
CY2012Q4	exc	Pledged Assets Liabilities Offset Separately Reported Other PledgedAssetsLiabilitiesOffsetSeparatelyReportedOther	564000000	USD
CY2013Q1	exc	Number Of Variable Interest Entities Not Consolidated NumberOfVariableInterestEntitiesNotConsolidated	9	VIE
CY2013Q1	exc	Number Of Variable Interest Entities Consolidated NumberOfVariableInterestEntitiesConsolidated	5	VIE
CY2013Q1	exc	Stock Compensation Expense StockCompensationExpense	1000000	USD
CY2012Q1	exc	Stock Compensation Expense StockCompensationExpense	8000000	USD
CY2012Q1	exc	Other Expense Charges OtherExpenseCharges	8000000	USD
CY2013Q1	exc	Severance Charges Expense SeveranceChargesExpense	2000000	USD
CY2012Q1	exc	Severance Charges Expense SeveranceChargesExpense	67000000	USD
CY2012Q1	exc	Total Severance Benefits Expense TotalSeveranceBenefitsExpense	83000000	USD
CY2013Q1	exc	Total Severance Benefits Expense TotalSeveranceBenefitsExpense	3000000	USD
CY2012Q4	us-gaap	Restructuring Reserve RestructuringReserve	111000000	USD
CY2013Q1	us-gaap	Restructuring Reserve RestructuringReserve	92000000	USD
CY2013Q1	us-gaap	Restructuring Reserve Settled With Cash RestructuringReserveSettledWithCash	-22000000	USD
CY2012Q1	us-gaap	Restructuring Reserve RestructuringReserve	83000000	USD
CY2013Q1	exc	Business Acquisition Construction Time Frame BusinessAcquisitionConstructionTimeFrame	P2Y
CY2013Q1	exc	Business Acquisition Gain Loss On Assets Sold BusinessAcquisitionGainLossOnAssetsSold	272000000	USD
CY2013Q1	exc	Business Acquisition Gain Loss On Assets Sold Update BusinessAcquisitionGainLossOnAssetsSoldUpdate	8000000	USD
CY2013Q1	exc	Business Acquisition Amortization Of Regulatory Asset BusinessAcquisitionAmortizationOfRegulatoryAsset	19000000	USD
CY2012Q1	exc	Business Acquisition Amortization Of Regulatory Asset BusinessAcquisitionAmortizationOfRegulatoryAsset	9000000	USD
CY2013Q1	exc	Business Acquisition Potential Cash Payment BusinessAcquisitionPotentialCashPayment	40000000	USD
CY2013Q1	exc	Por Net Receivables PorNetReceivables	219000000	USD
CY2013Q1	exc	Por Allowance PorAllowance	25000000	USD
CY2012Q4	exc	Por Net Receivables PorNetReceivables	170000000	USD
CY2012Q4	exc	Por Allowance PorAllowance	21000000	USD
CY2013Q1	exc	Por Gross Receivables PorGrossReceivables	244000000	USD
CY2012Q4	exc	Por Gross Receivables PorGrossReceivables	191000000	USD
CY2012Q1	exc	Current State Legislation Time Period CurrentStateLegislationTimePeriod	P10Y
CY2013Q1	exc	Projected Revenue Increase Due To Legislation Next Twelve Months ProjectedRevenueIncreaseDueToLegislationNextTwelveMonths	25000000	USD
CY2013Q1	exc	Projected Revenue Increase Due To Legislation Year Two ProjectedRevenueIncreaseDueToLegislationYearTwo	65000000	USD
CY2013Q1	exc	Projected Capital Expense Increase Due To Legislation Next Twelve Months ProjectedCapitalExpenseIncreaseDueToLegislationNextTwelveMonths	35000000	USD
CY2013Q1	exc	Projected Capital Expense Increase Due To Legislation Year Two ProjectedCapitalExpenseIncreaseDueToLegislationYearTwo	40000000	USD
CY2013Q1	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	383000000	USD
CY2013Q1	us-gaap	Investments Fair Value Disclosure InvestmentsFairValueDisclosure	11000000	USD
CY2013Q1	exc	Fair Value Assets Measured On Recurring Basis Total FairValueAssetsMeasuredOnRecurringBasisTotal	9946000000	USD
CY2013Q1	exc	Fair Value Liabilities Measured On Recurring Basis Deferred Compensation FairValueLiabilitiesMeasuredOnRecurringBasisDeferredCompensation	101000000	USD
CY2013Q1	exc	Fair Value Liabilities Measured On Recurring Basis Total FairValueLiabilitiesMeasuredOnRecurringBasisTotal	541000000	USD
CY2013Q1	exc	Fair Value Asset And Liabilities Measured On Recurring Basis Total Net FairValueAssetAndLiabilitiesMeasuredOnRecurringBasisTotalNet	9405000000	USD
CY2012Q4	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	995000000	USD
CY2012Q4	exc	Fair Value Assets Measured On Recurring Basis Total FairValueAssetsMeasuredOnRecurringBasisTotal	10785000000	USD
CY2012Q4	exc	Fair Value Liabilities Measured On Recurring Basis Deferred Compensation FairValueLiabilitiesMeasuredOnRecurringBasisDeferredCompensation	102000000	USD
CY2012Q4	exc	Fair Value Liabilities Measured On Recurring Basis Total FairValueLiabilitiesMeasuredOnRecurringBasisTotal	735000000	USD
CY2012Q4	exc	Fair Value Asset And Liabilities Measured On Recurring Basis Total Net FairValueAssetAndLiabilitiesMeasuredOnRecurringBasisTotalNet	10050000000	USD
CY2012Q4	us-gaap	Investments Fair Value Disclosure InvestmentsFairValueDisclosure	19000000	USD
CY2013Q1	exc	Forward Gas Basis ForwardGasBasis	0.15	USD
CY2013Q1	exc	Fair Value Inputs Cash Collateral Excluded FairValueInputsCashCollateralExcluded	9000000	USD
CY2013Q1	exc	Forward Power Basis ForwardPowerBasis	2.50	USD
CY2013Q1	exc	Interest Rate Derivative Assets Current InterestRateDerivativeAssetsCurrent	4000000	USD
CY2013Q1	exc	Interest Rate Derivative Assets Noncurrent InterestRateDerivativeAssetsNoncurrent	53000000	USD
CY2013Q1	exc	Total Interest Rate Mark To Market Derivative Assets TotalInterestRateMarkToMarketDerivativeAssets	57000000	USD
CY2013Q1	exc	Interest Rate Derivative Liabilities Current InterestRateDerivativeLiabilitiesCurrent	1000000	USD
CY2013Q1	exc	Interest Rate Derivative Liabilities Noncurrent InterestRateDerivativeLiabilitiesNoncurrent	27000000	USD
CY2013Q1	exc	Total Interest Rate Mark To Market Derivative Liabilities TotalInterestRateMarkToMarketDerivativeLiabilities	28000000	USD
CY2013Q1	exc	Interest Rate Derivative Fair Value Of Derivative Net InterestRateDerivativeFairValueOfDerivativeNet	29000000	USD
CY2013Q1	exc	Other Derivatives Not Designated As Hedging Instruments Reclassification To Realized At Settlement OtherDerivativesNotDesignatedAsHedgingInstrumentsReclassificationToRealizedAtSettlement	-57000000	USD
CY2013Q1	exc	Other Derivatives Not Designated As Hedging Instruments Gain Loss Net OtherDerivativesNotDesignatedAsHedgingInstrumentsGainLossNet	-386000000	USD
CY2012Q1	exc	Other Derivatives Not Designated As Hedging Instruments Change In Fair Value OtherDerivativesNotDesignatedAsHedgingInstrumentsChangeInFairValue	109000000	USD
CY2012Q1	exc	Other Derivatives Not Designated As Hedging Instruments Reclassification To Realized At Settlement OtherDerivativesNotDesignatedAsHedgingInstrumentsReclassificationToRealizedAtSettlement	-33000000	USD
CY2012Q1	exc	Other Derivatives Not Designated As Hedging Instruments Gain Loss Net OtherDerivativesNotDesignatedAsHedgingInstrumentsGainLossNet	76000000	USD
CY2013Q1	exc	Fair Value Of Derivative Liability With Credit Risk Related Contingent Features FairValueOfDerivativeLiabilityWithCreditRiskRelatedContingentFeatures	-1521000000	USD
CY2013Q1	exc	Contractual Right Of Offset ContractualRightOfOffset	1246000000	USD
CY2013Q1	exc	Net Asset Liability Position After Contractual Right Of Offset NetAssetLiabilityPositionAfterContractualRightOfOffset	-275000000	USD
CY2012Q4	exc	Fair Value Of Derivative Liability With Credit Risk Related Contingent Features FairValueOfDerivativeLiabilityWithCreditRiskRelatedContingentFeatures	-1849000000	USD
CY2013Q1	exc	Other Derivatives Not Designated As Hedging Instruments Change In Fair Value OtherDerivativesNotDesignatedAsHedgingInstrumentsChangeInFairValue	-329000000	USD
CY2012Q4	exc	Contractual Right Of Offset ContractualRightOfOffset	1426000000	USD
CY2012Q4	exc	Net Asset Liability Position After Contractual Right Of Offset NetAssetLiabilityPositionAfterContractualRightOfOffset	-423000000	USD
CY2013Q1	exc	Doe Interest Rate Swap DoeInterestRateSwap	485000000	USD
CY2013Q1	exc	Interest Rate Swaps Acquiree InterestRateSwapsAcquiree	550000000	USD
CY2013Q1	exc	Interest Rate Swaps Fair Value Acquiree InterestRateSwapsFairValueAcquiree	44000000	USD
CY2013Q1	exc	Notional Amount Interest Rate Swap Merger Acquiree NotionalAmountInterestRateSwapMergerAcquiree	150000000	USD
CY2013Q1	exc	Interest Rate Swap Merger Acquiree Fair Value InterestRateSwapMergerAcquireeFairValue	4000000	USD
CY2013Q1	us-gaap	Gain Loss On Cash Flow Hedge Ineffectiveness Net GainLossOnCashFlowHedgeIneffectivenessNet	0	USD
CY2013Q1	exc	Cash Flow Hedge Gain Loss Reclassified To Pretax Net Income From Accumulated Other Comprehensive Income CashFlowHedgeGainLossReclassifiedToPretaxNetIncomeFromAccumulatedOtherComprehensiveIncome	99000000	USD
CY2012Q1	exc	Cash Flow Hedge Gain Loss Reclassified To Pretax Net Income From Accumulated Other Comprehensive Income CashFlowHedgeGainLossReclassifiedToPretaxNetIncomeFromAccumulatedOtherComprehensiveIncome	173000000	USD
CY2013Q1	exc	Less Than One Million Decrease LessThanOneMillionDecrease	1000000	USD
CY2013Q1	us-gaap	Notional Amount Of Interest Rate Fair Value Hedge Derivatives NotionalAmountOfInterestRateFairValueHedgeDerivatives	650000000	USD
CY2012Q4	us-gaap	Notional Amount Of Interest Rate Fair Value Hedge Derivatives NotionalAmountOfInterestRateFairValueHedgeDerivatives	650000000	USD
CY2013Q1	exc	Hypothetical Increase In Interest Rates HypotheticalIncreaseInInterestRates	0.005	pure
CY2013Q1	us-gaap	Commercial Paper CommercialPaper	0	USD
CY2012Q4	us-gaap	Commercial Paper CommercialPaper	0	USD
CY2013Q1	exc	Aggregate Bank Commitments Under Unsecured Revolving Credit Facilities AggregateBankCommitmentsUnderUnsecuredRevolvingCreditFacilities	8400000000	USD
CY2013Q1	exc	Basis Points For Prime Based Borrowings BasisPointsForPrimeBasedBorrowings	0.0065	pure
CY2013Q1	exc	Basis Points For Libor Based Borrowings BasisPointsForLiborBasedBorrowings	0.0165	pure
CY2013Q1	exc	Effective Income Tax Rate Reconciliation Plant Basis Differences EffectiveIncomeTaxRateReconciliationPlantBasisDifferences	-0.249	pure
CY2013Q1	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.074	pure
CY2013Q1	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.982	pure
CY2012Q1	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35	pure
CY2012Q1	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	-0.274	pure
CY2012Q1	exc	Effective Income Tax Rate Reconciliation Qualified Nuclear Decommissioning Trust Fund Income Losses EffectiveIncomeTaxRateReconciliationQualifiedNuclearDecommissioningTrustFundIncomeLosses	0.16	pure
CY2013Q1	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35	pure
CY2013Q1	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.68	pure
CY2013Q1	exc	Effective Income Tax Rate Reconciliation Qualified Nuclear Decommissioning Trust Fund Income Losses EffectiveIncomeTaxRateReconciliationQualifiedNuclearDecommissioningTrustFundIncomeLosses	0.62	pure
CY2013Q1	us-gaap	Effective Income Tax Rate Reconciliation Deductions Qualified Production Activities EffectiveIncomeTaxRateReconciliationDeductionsQualifiedProductionActivities	-0.024	pure
CY2013Q1	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0.016	pure
CY2012Q1	us-gaap	Effective Income Tax Rate Reconciliation Deductions Qualified Production Activities EffectiveIncomeTaxRateReconciliationDeductionsQualifiedProductionActivities	-0.012	pure
CY2012Q1	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0.004	pure
CY2012Q1	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Investment EffectiveIncomeTaxRateReconciliationTaxCreditsInvestment	-0.008	pure
CY2012Q1	exc	Effective Income Tax Rate Reconciliation Plant Basis Differences EffectiveIncomeTaxRateReconciliationPlantBasisDifferences	-0.03	pure
CY2012Q1	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.003	pure
CY2012Q1	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.441	pure
CY2013Q1	us-gaap	Effective Income Tax Rate Reconciliation Deductions Other EffectiveIncomeTaxRateReconciliationDeductionsOther	0.217	pure
CY2013Q1	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Investment EffectiveIncomeTaxRateReconciliationTaxCreditsInvestment	-0.258	pure
CY2012Q1	us-gaap	Effective Income Tax Rate Reconciliation Deductions Other EffectiveIncomeTaxRateReconciliationDeductionsOther	0.005	pure
CY2012Q1	exc	Effective Income Tax Rate Reconciliation Elimination Of Deductions Medicare Prescription Drug Benefit EffectiveIncomeTaxRateReconciliationEliminationOfDeductionsMedicarePrescriptionDrugBenefit	0.002	pure
CY2012Q1	exc	Effective Income Tax Rate Reconciliation Fines And Penalties EffectiveIncomeTaxRateReconciliationFinesAndPenalties	0.133	pure
CY2012Q1	exc	Effective Income Tax Rate Reconciliation Merger Expenses EffectiveIncomeTaxRateReconciliationMergerExpenses	0.132	pure
CY2013Q1	exc	Effective Income Tax Rate Reconciliation Elimination Of Deductions Medicare Prescription Drug Benefit EffectiveIncomeTaxRateReconciliationEliminationOfDeductionsMedicarePrescriptionDrugBenefit	0.022	pure
CY2013Q1	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	1656000000	USD
CY2010Q2	exc	Remeasurement Interest Expense RemeasurementInterestExpense	65000000	USD
CY2010	exc	Preliminary Settlement Payment To Irs PreliminarySettlementPaymentToIrs	302000000	USD
CY2013Q1	us-gaap	Unrecognized Tax Benefits Income Tax Penalties Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesExpense	265000000	USD
CY2013Q1	exc	Income Tax And Penalties From Potential Settle With Taxing Authority IncomeTaxAndPenaltiesFromPotentialSettleWithTaxingAuthority	840000000	USD
CY1999Q4	exc	Deferred Income Tax Gain On Sale Of Assets DeferredIncomeTaxGainOnSaleOfAssets	2800000000	USD
CY1999Q4	exc	Deferred Income Tax Gain In Voluntary Conversion DeferredIncomeTaxGainInVoluntaryConversion	1600000000	USD
CY1999Q4	exc	Deferred Income Tax Gain Like Kind Exchange DeferredIncomeTaxGainLikeKindExchange	1200000000	USD
CY2013Q1	exc	Unrecognized Tax Benefits Income Tax Penalties Expense Like Kind Exchange UnrecognizedTaxBenefitsIncomeTaxPenaltiesExpenseLikeKindExchange	86000000	USD
CY2012Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	1024000000	USD
CY2013Q1	exc	Unrealized Gain Loss Investment Income Nuclear Decommissioning Trust Funds Regulatory Accounting UnrealizedGainLossInvestmentIncomeNuclearDecommissioningTrustFundsRegulatoryAccounting	195000000	USD
CY2012	exc	Unrealized Gain Loss Investment Income Nuclear Decommissioning Trust Funds Regulatory Accounting UnrealizedGainLossInvestmentIncomeNuclearDecommissioningTrustFundsRegulatoryAccounting	247000000	USD
CY2013Q1	exc	Unrealized Gain Loss Investment Income Nuclear Decommissioning Trust Funds Nonregulatory Accounting UnrealizedGainLossInvestmentIncomeNuclearDecommissioningTrustFundsNonregulatoryAccounting	64000000	USD
CY2012	exc	Unrealized Gain Loss Investment Income Nuclear Decommissioning Trust Funds Nonregulatory Accounting UnrealizedGainLossInvestmentIncomeNuclearDecommissioningTrustFundsNonregulatoryAccounting	65000000	USD
CY2013Q1	exc	Unrealized Gain Loss Investment Income Zion Station Pledged Assets UnrealizedGainLossInvestmentIncomeZionStationPledgedAssets	2000000	USD
CY2012Q1	exc	Unrealized Gain Loss Investment Income Zion Station Pledged Assets UnrealizedGainLossInvestmentIncomeZionStationPledgedAssets	35000000	USD
CY2013Q1	exc	Payable To Thirdparty To Decommission Nuclear Plant Funded By Pledged Assets PayableToThirdpartyToDecommissionNuclearPlantFundedByPledgedAssets	531000000	USD
CY2013Q1	exc	Current Portion Of Payable To Thirdparty To Decommission Nuclear Plant Funded By Pledged Assets CurrentPortionOfPayableToThirdpartyToDecommissionNuclearPlantFundedByPledgedAssets	159000000	USD
CY2013Q1	exc	Withdrawal From Nuclear Decommissioning Funds WithdrawalFromNuclearDecommissioningFunds	371000000	USD
CY2012Q4	exc	Current Portion Of Payable To Thirdparty To Decommission Nuclear Plant Funded By Pledged Assets CurrentPortionOfPayableToThirdpartyToDecommissionNuclearPlantFundedByPledgedAssets	132000000	USD
CY2012	exc	Withdrawal From Nuclear Decommissioning Funds WithdrawalFromNuclearDecommissioningFunds	335000000	USD
CY2012Q4	exc	Payable To Thirdparty To Decommission Nuclear Plant Funded By Pledged Assets PayableToThirdpartyToDecommissionNuclearPlantFundedByPledgedAssets	564000000	USD
CY2013Q1	exc	Spent Nuclear Fuel Obligation Zionsolutions SpentNuclearFuelObligationZionsolutions	79000000	USD
CY2013Q1	exc	Nuclear Asset Retirement Obligation Revision Of Estimate Zion Station NuclearAssetRetirementObligationRevisionOfEstimateZionStation	0	USD
CY2012Q4	exc	Additional Nrc Funding Assurance Parent Guarantees AdditionalNrcFundingAssuranceParentGuarantees	115000000	USD
CY2013Q1	exc	Nuclear Decommissioning Annual Recovery Current NuclearDecommissioningAnnualRecoveryCurrent	24000000	USD
CY2013Q1	exc	Decommissioning Shortfall DecommissioningShortfall	50000000	USD
CY2013Q1	exc	Decommissioning Shortfall Percentage DecommissioningShortfallPercentage	0.05	pure
CY2013Q1	exc	Defined Contribution Plan Contributions By Employer DefinedContributionPlanContributionsByEmployer	22000000	USD
CY2012Q1	exc	Defined Contribution Plan Contributions By Employer DefinedContributionPlanContributionsByEmployer	16000000	USD
CY2013Q1	exc	Qualified Defined Benefit Plan Estimated Future Employer Contributions In Next Fiscal Year QualifiedDefinedBenefitPlanEstimatedFutureEmployerContributionsInNextFiscalYear	255000000	USD
CY2013Q1	exc	Non Qualified Defined Benefit Plan Estimated Future Employer Contributions In Next Fiscal Year NonQualifiedDefinedBenefitPlanEstimatedFutureEmployerContributionsInNextFiscalYear	79000000	USD
CY2013Q1	exc	Defined Other Postretirement Benefit Plan Estimated Future Employer Contributions In Next Fiscal Year DefinedOtherPostretirementBenefitPlanEstimatedFutureEmployerContributionsInNextFiscalYear	292000000	USD
CY2013Q1	exc	Share Based Compensation Components Performance Shares ShareBasedCompensationComponentsPerformanceShares	16000000	USD
CY2013Q1	exc	Share Based Compensation Components Stock Options ShareBasedCompensationComponentsStockOptions	1000000	USD
CY2013Q1	exc	Share Based Compensation Components Restricted Stock ShareBasedCompensationComponentsRestrictedStock	20000000	USD
CY2013Q1	exc	Share Based Compensation Components Other Stock Based Awards ShareBasedCompensationComponentsOtherStockBasedAwards	1000000	USD
CY2013Q1	exc	Share Based Compensation Components Total In Operating And Maintenance Pre Tax ShareBasedCompensationComponentsTotalInOperatingAndMaintenancePreTax	38000000	USD
CY2013Q1	exc	Share Based Compensation Income Tax Benefit ShareBasedCompensationIncomeTaxBenefit	15000000	USD
CY2013Q1	exc	Share Based Compensation Components Total In Expense After Tax ShareBasedCompensationComponentsTotalInExpenseAfterTax	23000000	USD
CY2012Q1	exc	Share Based Compensation Components Performance Shares ShareBasedCompensationComponentsPerformanceShares	16000000	USD
CY2012Q1	exc	Share Based Compensation Components Stock Options ShareBasedCompensationComponentsStockOptions	7000000	USD
CY2012Q1	exc	Share Based Compensation Components Restricted Stock ShareBasedCompensationComponentsRestrictedStock	19000000	USD
CY2012Q1	exc	Share Based Compensation Components Other Stock Based Awards ShareBasedCompensationComponentsOtherStockBasedAwards	1000000	USD
CY2012Q1	exc	Share Based Compensation Components Total In Operating And Maintenance Pre Tax ShareBasedCompensationComponentsTotalInOperatingAndMaintenancePreTax	43000000	USD
CY2012Q1	exc	Share Based Compensation Income Tax Benefit ShareBasedCompensationIncomeTaxBenefit	16000000	USD
CY2012Q1	exc	Share Based Compensation Components Total In Expense After Tax ShareBasedCompensationComponentsTotalInExpenseAfterTax	27000000	USD
CY2013Q1	exc	Share Based Compensation Components Total In Expense Pre Tax ShareBasedCompensationComponentsTotalInExpensePreTax	38000000	USD
CY2012Q1	exc	Share Based Compensation Components Total In Expense Pre Tax ShareBasedCompensationComponentsTotalInExpensePreTax	43000000	USD
CY2013Q1	exc	Share Based Compensation Shares Authorized Under Ltip Plans ShareBasedCompensationSharesAuthorizedUnderLtipPlans	16000000	shares
CY2013Q1	exc	Unrecognized Compensation Costs Related To Nonvested Stock Options UnrecognizedCompensationCostsRelatedToNonvestedStockOptions	5000000	USD
CY2013Q1	exc	Restricted Stock Units Obligations Not Yet Settled RestrictedStockUnitsObligationsNotYetSettled	48000000	USD
CY2013Q1	exc	Restricted Stock Units Obligations To Be Settled In Cash RestrictedStockUnitsObligationsToBeSettledInCash	0	USD
CY2013Q1	exc	Fair Value Of Settled Restricted Stock Units FairValueOfSettledRestrictedStockUnits	22000000	USD
CY2012Q1	exc	Fair Value Of Settled Restricted Stock Units FairValueOfSettledRestrictedStockUnits	20000000	USD
CY2013Q1	exc	Unrecognized Compensation Costs Related To Nonvested Restricted Stock Units UnrecognizedCompensationCostsRelatedToNonvestedRestrictedStockUnits	94000000	USD
CY2013Q1	exc	Fair Value Of Settled Performance Share Awards FairValueOfSettledPerformanceShareAwards	22000000	USD
CY2012Q1	exc	Fair Value Of Settled Performance Share Awards FairValueOfSettledPerformanceShareAwards	18000000	USD
CY2013Q1	exc	Performance Share Awards Obligations To Be Settled In Cash PerformanceShareAwardsObligationsToBeSettledInCash	9000000	USD
CY2012Q1	exc	Performance Share Awards Obligations To Be Settled In Cash PerformanceShareAwardsObligationsToBeSettledInCash	3000000	USD
CY2013Q1	exc	Unrecognized Compensation Costs Related To Nonvested Performance Share Awards UnrecognizedCompensationCostsRelatedToNonvestedPerformanceShareAwards	47000000	USD
CY2013Q1	exc	Percentage Current Performance Share Awards Settled In Stock PercentageCurrentPerformanceShareAwardsSettledInStock	0.5	pure
CY2013Q1	exc	Percentage Current Performance Share Awards Settled In Cash PercentageCurrentPerformanceShareAwardsSettledInCash	0.5	pure
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CY2013Q1	exc	Weighted Average Period Non Vested Stock Options Are Expected To Be Recognized Over WeightedAveragePeriodNonVestedStockOptionsAreExpectedToBeRecognizedOver	P2Y1M7D
CY2013Q1	exc	Weighted Average Period Non Vested Restricted Stock Units Are Expected To Be Recognized Over WeightedAveragePeriodNonVestedRestrictedStockUnitsAreExpectedToBeRecognizedOver	P2Y7M9D
CY2013Q1	exc	Unrecognized Compensation Costs Related To Nonvested Performance Share Transition Awards UnrecognizedCompensationCostsRelatedToNonvestedPerformanceShareTransitionAwards	29000000	USD
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CY2013Q1	exc	Expected Total Shareholder Return Modifier Percentage Increase ExpectedTotalShareholderReturnModifierPercentageIncrease	0.25	pure
CY2013Q1	exc	Expected Total Stockholder Return Modifier Percentage Decrease ExpectedTotalStockholderReturnModifierPercentageDecrease	0.25	pure
CY2013Q1	exc	Expected Individual Performance Modifier Percentage Decrease ExpectedIndividualPerformanceModifierPercentageDecrease	0.5	pure
CY2013Q1	exc	Expected Individual Performance Modifier Percentage Increase ExpectedIndividualPerformanceModifierPercentageIncrease	0.2	pure
CY2013Q1	exc	Expected Individual Performance Modifier Percentage Increase For Senior Vice Presidents And Above ExpectedIndividualPerformanceModifierPercentageIncreaseForSeniorVicePresidentsAndAbove	0.1	pure
CY2013Q1	exc	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	100000000	USD
CY2013Q1	exc	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-6000000	USD
CY2013Q1	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
CY2012Q1	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	2000000	shares
CY2012Q1	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	11000000	shares
CY2013Q1	exc	Business Acquisitions Total Settlement BusinessAcquisitionsTotalSettlement	328500000	USD
CY2013Q1	exc	Business Acquisition Contributions Per Year BusinessAcquisitionContributionsPerYear	7000000	USD
CY2013Q1	exc	Business Acquisitions Charitable Contributions Length Of Years BusinessAcquisitionsCharitableContributionsLengthOfYears	P10Y
CY2012Q2	exc	Business Acquisition Equity Contribution BusinessAcquisitionEquityContribution	66000000	USD
CY2013Q1	us-gaap	Guarantee Obligations Maximum Exposure GuaranteeObligationsMaximumExposure	11617000000	USD
CY2013Q1	us-gaap	Site Contingency Loss Exposure Not Accrued Low Estimate SiteContingencyLossExposureNotAccruedLowEstimate	430000000	USD
CY2013Q1	exc	Total Shared Gain Loss Related To Environmental Litigation Settlement TotalSharedGainLossRelatedToEnvironmentalLitigationSettlement	500000	USD
CY2013Q1	exc	Gain Loss Related To Environmental Litigation Settlement GainLossRelatedToEnvironmentalLitigationSettlement	200000	USD
CY2013Q1	exc	New Source Performance Standards Emissions Limit NewSourcePerformanceStandardsEmissionsLimit	1000	PoundsPerMWh
CY2013Q1	exc	New Source Performance Standard Emissions Limit First Ten Years NewSourcePerformanceStandardEmissionsLimitFirstTenYears	1800	PoundsPerMWh
CY2013Q1	exc	New Source Performance Standard Emissions Limit After Ten Years NewSourcePerformanceStandardEmissionsLimitAfterTenYears	600	PoundsPerMWh
CY2013Q1	exc	Effective Number Of Years For Tailoring Rule EffectiveNumberOfYearsForTailoringRule	P6Y
CY2012Q3	us-gaap	Environmental Exit Costs Assets Previously Disposed Liability For Remediation EnvironmentalExitCostsAssetsPreviouslyDisposedLiabilityForRemediation	9000000	USD
CY2013Q1	exc	Minimum Ghg Emissions Required For Eligibility For Stationary Source Permitting MinimumGhgEmissionsRequiredForEligibilityForStationarySourcePermitting	100000
CY2013Q1	exc	Minimum Additional Ghg Emissions Required For Eligibility For Stationary Source Permitting After Modifications MinimumAdditionalGhgEmissionsRequiredForEligibilityForStationarySourcePermittingAfterModifications	75000
CY2012Q1	exc	Gain Loss Investment Income Nuclear Decommissioning Trust Funds GainLossInvestmentIncomeNuclearDecommissioningTrustFunds	178000000	USD
CY2012Q1	us-gaap	Capital Leases Income Statement Direct Financing Lease Revenue CapitalLeasesIncomeStatementDirectFinancingLeaseRevenue	7000000	USD
CY2012Q1	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	2000000	USD
CY2013Q1	exc	Expected Class Action Settlement ExpectedClassActionSettlement	4000000	USD
CY2012Q1	us-gaap	Loss Contingency Number Of Defendants LossContingencyNumberOfDefendants	15	Defendants
CY2013Q1	exc	Realized Gain Loss Investment Income Nuclear Decommissioning Trust Funds Regulatory Accounting RealizedGainLossInvestmentIncomeNuclearDecommissioningTrustFundsRegulatoryAccounting	36000000	USD
CY2013Q1	exc	Realized Gain Loss Investment Income Nuclear Decommissioning Trust Funds Nonregulatory Accounting RealizedGainLossInvestmentIncomeNuclearDecommissioningTrustFundsNonregulatoryAccounting	14000000	USD
CY2013Q1	exc	Unrealized Gain Loss Nuclear Decommissioning Trust Funds Regulatory Accounting UnrealizedGainLossNuclearDecommissioningTrustFundsRegulatoryAccounting	195000000	USD
CY2013Q1	exc	Unrealized Gain Loss Nuclear Decommissioning Trust Funds Nonregulatory Accounting UnrealizedGainLossNuclearDecommissioningTrustFundsNonregulatoryAccounting	64000000	USD
CY2013Q1	exc	Net Unrealized Gain Loss On Pledged Assets NetUnrealizedGainLossOnPledgedAssets	2000000	USD
CY2013Q1	exc	Regulatory Offset Nuclear Decommissioning Trust Fund Activity RegulatoryOffsetNuclearDecommissioningTrustFundActivity	190000000	USD
CY2013Q1	exc	Gain Loss Investment Income Nuclear Decommissioning Trust Funds GainLossInvestmentIncomeNuclearDecommissioningTrustFunds	121000000	USD
CY2013Q1	us-gaap	Investment Income Interest InvestmentIncomeInterest	3000000	USD
CY2013Q1	us-gaap	Capital Leases Income Statement Direct Financing Lease Revenue CapitalLeasesIncomeStatementDirectFinancingLeaseRevenue	8000000	USD
CY2013Q1	exc	Unrecognized Tax Benefits Interest Income UnrecognizedTaxBenefitsInterestIncome	25000000	USD
CY2013Q1	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	6000000	USD
CY2013Q1	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	9000000	USD
CY2012Q1	exc	Realized Gain Loss Investment Income Nuclear Decommissioning Trust Funds Regulatory Accounting RealizedGainLossInvestmentIncomeNuclearDecommissioningTrustFundsRegulatoryAccounting	60000000	USD
CY2012Q1	exc	Realized Gain Loss Investment Income Nuclear Decommissioning Trust Funds Nonregulatory Accounting RealizedGainLossInvestmentIncomeNuclearDecommissioningTrustFundsNonregulatoryAccounting	48000000	USD
CY2012Q1	exc	Unrealized Gain Loss Nuclear Decommissioning Trust Funds Regulatory Accounting UnrealizedGainLossNuclearDecommissioningTrustFundsRegulatoryAccounting	247000000	USD
CY2012Q1	exc	Unrealized Gain Loss Nuclear Decommissioning Trust Funds Nonregulatory Accounting UnrealizedGainLossNuclearDecommissioningTrustFundsNonregulatoryAccounting	65000000	USD
CY2012Q1	exc	Regulatory Offset Nuclear Decommissioning Trust Fund Activity RegulatoryOffsetNuclearDecommissioningTrustFundActivity	277000000	USD
CY2012Q1	exc	Net Unrealized Gain Loss On Pledged Assets NetUnrealizedGainLossOnPledgedAssets	35000000	USD
CY2012Q1	us-gaap	Investment Income Interest InvestmentIncomeInterest	4000000	USD
CY2012Q1	exc	Unrecognized Tax Benefits Interest Income UnrecognizedTaxBenefitsInterestIncome	0	USD
CY2012Q1	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	3000000	USD
CY2013Q1	exc	Energy Contract Amortization EnergyContractAmortization	176000000	USD
CY2013Q1	us-gaap	Depreciation Depreciation	471000000	USD
CY2013Q1	us-gaap	Amortization Of Regulatory Asset AmortizationOfRegulatoryAsset	61000000	USD
CY2013Q1	exc	Nuclear Fuel Amortization NuclearFuelAmortization	230000000	USD
CY2013Q1	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	68000000	USD
CY2012Q1	us-gaap	Depreciation Depreciation	354000000	USD
CY2012Q1	us-gaap	Amortization Of Regulatory Asset AmortizationOfRegulatoryAsset	25000000	USD
CY2012Q1	exc	Nuclear Fuel Amortization NuclearFuelAmortization	207000000	USD
CY2012Q1	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	56000000	USD
CY2012Q1	exc	Amortization Of Intangible Assets Net AmortizationOfIntangibleAssetsNet	3000000	USD
CY2012Q1	exc	Energy Contract Amortization EnergyContractAmortization	131000000	USD
CY2013Q1	exc	Amortization Of Intangible Assets Net AmortizationOfIntangibleAssetsNet	11000000	USD
CY2013Q1	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	205000000	USD
CY2013Q1	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	45000000	USD
CY2013Q1	us-gaap	Share Based Compensation ShareBasedCompensation	39000000	USD
CY2013Q1	exc	Other Decommissioning Related Activity OtherDecommissioningRelatedActivity	-64000000	USD
CY2013Q1	exc	Energy Related Options EnergyRelatedOptions	21000000	USD
CY2013Q1	exc	Amortization Of Regulatory Asset Debt Costs AmortizationOfRegulatoryAssetDebtCosts	4000000	USD
CY2013Q1	exc	Other Noncash Income Expense Net OtherNoncashIncomeExpenseNet	1000000	USD
CY2013Q1	us-gaap	Increase Decrease In Over Under Energy Recovery IncreaseDecreaseInOverUnderEnergyRecovery	-29000000	USD
CY2013Q1	exc	Increase Decrease In Other Current Operating Assets And Liabilities IncreaseDecreaseInOtherCurrentOperatingAssetsAndLiabilities	169000000	USD
CY2013Q1	exc	Increase Decrease In Other Noncurrent Operating Assets Liabilities IncreaseDecreaseInOtherNoncurrentOperatingAssetsLiabilities	-282000000	USD
CY2013Q1	exc	Impacts Energy Infrastructure Modernization Act ImpactsEnergyInfrastructureModernizationAct	49000000	USD
CY2013Q1	exc	Amortization Rate Stabilization Deferral AmortizationRateStabilizationDeferral	30000000	USD
CY2013Q1	exc	Other Regulatory Assets And Liabilities OtherRegulatoryAssetsAndLiabilities	-91000000	USD
CY2013Q1	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-9000000	USD
CY2013Q1	exc	Noncash Investing And Financing Activities Total NoncashInvestingAndFinancingActivitiesTotal	63000000	USD
CY2013Q1	us-gaap	Adjustments Noncash Items To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	231000000	USD
CY2013Q1	exc	Amortization Of Debt Fair Value Adjustment AmortizationOfDebtFairValueAdjustment	-9000000	USD
CY2013Q1	exc	Amortization Of Debt Costs AmortizationOfDebtCosts	5000000	USD
CY2013Q1	us-gaap	Noncash Merger Related Costs NoncashMergerRelatedCosts	-6000000	USD
CY2012Q1	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	181000000	USD
CY2012Q1	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	40000000	USD
CY2012Q1	exc	Other Noncash Income Expense Net OtherNoncashIncomeExpenseNet	-11000000	USD
CY2012Q1	exc	Amortization Of Regulatory Asset Debt Costs AmortizationOfRegulatoryAssetDebtCosts	6000000	USD
CY2012Q1	exc	Energy Related Options EnergyRelatedOptions	28000000	USD
CY2012Q1	exc	Other Decommissioning Related Activity OtherDecommissioningRelatedActivity	-71000000	USD
CY2012Q1	us-gaap	Share Based Compensation ShareBasedCompensation	39000000	USD
CY2012Q1	us-gaap	Increase Decrease In Over Under Energy Recovery IncreaseDecreaseInOverUnderEnergyRecovery	25000000	USD
CY2012Q1	exc	Increase Decrease In Other Current Operating Assets And Liabilities IncreaseDecreaseInOtherCurrentOperatingAssetsAndLiabilities	18000000	USD
CY2012Q1	exc	Increase Decrease In Other Noncurrent Operating Assets Liabilities IncreaseDecreaseInOtherNoncurrentOperatingAssetsLiabilities	-18000000	USD
CY2012Q1	exc	Uncollectible Accounts Recovery UncollectibleAccountsRecovery	0	USD
CY2012Q1	exc	Other Regulatory Assets And Liabilities OtherRegulatoryAssetsAndLiabilities	97000000	USD
CY2012Q1	exc	Impacts Two Thousand Ten Rate Case ImpactsTwoThousandTenRateCase	38000000	USD
CY2012Q1	us-gaap	Adjustments Noncash Items To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	530000000	USD
CY2012Q1	us-gaap	Business Combination Bargain Purchase Gain Recognized Amount BusinessCombinationBargainPurchaseGainRecognizedAmount	0	USD
CY2012Q1	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-22000000	USD
CY2012Q1	us-gaap	Noncash Merger Related Costs NoncashMergerRelatedCosts	331000000	USD
CY2012Q1	us-gaap	Stock Issued1 StockIssued1	7365000000	USD
CY2012Q1	exc	Noncash Investing And Financing Activities Total NoncashInvestingAndFinancingActivitiesTotal	7365000000	USD
CY2012Q1	exc	Amortization Rate Stabilization Deferral AmortizationRateStabilizationDeferral	3000000	USD
CY2013Q1	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	12579000000	USD
CY2013Q1	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	320000000	USD
CY2012Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	12184000000	USD
CY2012Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	293000000	USD
CY2013Q1	exc	Smart Grid Grant Project Capital Expenditures SmartGridGrantProjectCapitalExpenditures	21000000	USD
CY2013Q1	exc	Smart Grid Grant Reimbursements SmartGridGrantReimbursements	32000000	USD
CY2012Q1	exc	Smart Grid Grant Project Capital Expenditures SmartGridGrantProjectCapitalExpenditures	26000000	USD
CY2012Q1	exc	Smart Grid Grant Reimbursements SmartGridGrantReimbursements	35000000	USD
CY2013Q1	exc	Accumulated Amortization Nuclear Fuel AccumulatedAmortizationNuclearFuel	2221000000	USD
CY2012Q4	exc	Accumulated Amortization Nuclear Fuel AccumulatedAmortizationNuclearFuel	2078000000	USD
CY2012Q1	us-gaap	Segment Reporting Information Revenue SegmentReportingInformationRevenue	4690000000	USD
CY2013Q1	us-gaap	Segment Reporting Information Revenue SegmentReportingInformationRevenue	6082000000	USD
CY2013Q1	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	9	ReportableSegments
CY2013Q1	us-gaap	Interest Expense InterestExpense	617000000	USD
CY2013Q1	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	172000000	USD
CY2012Q1	us-gaap	Interest Expense InterestExpense	189000000	USD
CY2013Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.01
CY2012Q1	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	101000000	USD
CY2012Q4	us-gaap	Other Receivables OtherReceivables	1147000000	USD
CY2012Q4	us-gaap	Goodwill Goodwill	2625000000	USD
CY2012Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	975000000	USD
CY2013Q1	us-gaap	Pledged Assets Separately Reported Other Assets Pledged As Collateral At Fair Value PledgedAssetsSeparatelyReportedOtherAssetsPledgedAsCollateralAtFairValue	580000000	USD
CY2013Q1	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	1764000000	USD
CY2012Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	705000000	shares
CY2012Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.28
CY2013Q1	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-451000000	USD
CY2012Q1	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-394000000	USD
CY2012Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	359000000	USD
CY2012Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	1000000	USD
CY2013Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	95000000	USD
CY2012Q1	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	73000000	USD
CY2012Q1	us-gaap	Gain Loss On Investments GainLossOnInvestments	103000000	USD
CY2012Q1	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-104000000	USD
CY2012Q4	us-gaap	Energy Related Inventory Other Fossil Fuel EnergyRelatedInventoryOtherFossilFuel	246000000	USD
CY2013Q1	exc	Pledged Assets Liabilities Offset Separately Reported Other PledgedAssetsLiabilitiesOffsetSeparatelyReportedOther	531000000	USD
CY2012Q4	us-gaap	Other Assets Current OtherAssetsCurrent	560000000	USD
CY2013Q1	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	543000000	USD
CY2012Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	451000000	USD
CY2012Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.28
CY2012Q1	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.53

Files In Submission

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0001193125-13-211545-index-headers.html	Edgar Link	pending
0001193125-13-211545-index.html	Edgar Link	pending
0001193125-13-211545.txt	Edgar Link	pending
0001193125-13-211545-xbrl.zip	Edgar Link	pending
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exc-20130331.xml	Edgar Link	completed
exc-20130331.xsd	Edgar Link	pending
exc-20130331_cal.xml	Edgar Link	unprocessable
exc-20130331_def.xml	Edgar Link	unprocessable
exc-20130331_lab.xml	Edgar Link	unprocessable
exc-20130331_pre.xml	Edgar Link	unprocessable
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$EXC
EXELON CORP Stock $exc

2013 Q1 Form 10-Q Financial Statement

#000119312513211545 Filed on May 10, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$EXC EXELON CORP Stock $exc

2013 Q1 Form 10-Q Financial Statement

#000119312513211545 Filed on May 10, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$EXC
EXELON CORP Stock $exc