$EXC
EXELON CORP

2010 Q4 Form 10-K Financial Statement

#000119312512049043 Filed on February 09, 2012

View on sec.gov

Income Statement

Concept 2010 Q4 2010 Q3 2010 Q2
Revenue $4.494B $5.291B $4.398B
YoY Change 9.18% 21.94% 6.21%
Cost Of Revenue $1.152B $1.481B $1.134B
YoY Change 41.35% 86.06% 23.13%
Gross Profit $3.342B $3.810B $3.264B
YoY Change 1.24% 7.54% 1.37%
Gross Profit Margin 74.37% 72.01% 74.22%
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization $688.0M $288.0M $279.0M
YoY Change 3.3% 19.01% -55.78%
% of Gross Profit 20.59% 7.56% 8.55%
Operating Expenses $2.402B $2.444B $2.246B
YoY Change 10.23% 13.94% 1.91%
Operating Profit $939.0M $1.367B $1.018B
YoY Change -12.73% -2.57% 0.2%
Interest Expense -$184.0M $169.0M $269.0M
YoY Change 1.66% -0.59% -244.62%
% of Operating Profit -19.6% 12.36% 26.42%
Other Income/Expense, Net $135.0M $31.00M -$397.0M
YoY Change 128.81% -164.58% -254.47%
Pretax Income $891.0M $1.397B $621.0M
YoY Change -6.6% 3.1% -42.87%
Income Tax $367.0M $552.0M $176.0M
% Of Pretax Income 41.19% 39.51% 28.34%
Net Earnings $524.0M $845.0M $445.0M
YoY Change -9.81% 11.62% -32.27%
Net Earnings / Revenue 11.66% 15.97% 10.12%
Basic Earnings Per Share $0.79 $1.28 $0.67
Diluted Earnings Per Share $0.79 $1.27 $0.67
COMMON SHARES
Basic Shares Outstanding 662.0M shares 662.0M shares 661.0M shares
Diluted Shares Outstanding 663.0M shares 663.0M shares 662.0M shares

Balance Sheet

Concept 2010 Q4 2010 Q3 2010 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments $1.612B $2.735B $1.168B
YoY Change -19.8% 15.21% -36.45%
Cash & Equivalents $1.612B $2.735B $1.168B
Short-Term Investments
Other Short-Term Assets $325.0M $388.0M $1.336B
YoY Change 55.5% -55.76% 10.5%
Inventory $806.0M $809.0M $759.0M
Prepaid Expenses
Receivables $1.932B $1.816B $1.886B
Other Receivables $1.196B $464.0M $451.0M
Total Short-Term Assets $6.398B $6.760B $5.600B
YoY Change 17.59% 14.67% -3.86%
LONG-TERM ASSETS
Property, Plant & Equipment $29.94B $28.55B $28.03B
YoY Change 9.51% 7.13% 6.56%
Goodwill $2.625B $2.625B
YoY Change 0.0%
Intangibles
YoY Change
Long-Term Investments $39.00M $728.0M $723.0M
YoY Change -29.09% -0.55% 0.0%
Other Assets $763.0M $604.0M $12.20B
YoY Change -11.18% -95.56% -9.67%
Total Long-Term Assets $45.84B $44.19B $43.57B
YoY Change 4.81% 1.33% 0.97%
TOTAL ASSETS
Total Short-Term Assets $6.398B $6.760B $5.600B
Total Long-Term Assets $45.84B $44.19B $43.57B
Total Assets $52.24B $50.95B $49.17B
YoY Change 6.22% 2.92% 0.4%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable $1.373B $1.056B $1.181B
YoY Change 2.08% -1.77% 3.23%
Accrued Expenses $1.040B $1.203B $1.098B
YoY Change 12.68% 35.47% 5.07%
Deferred Revenue
YoY Change
Short-Term Debt $0.00 $65.00M $514.0M
YoY Change -100.0% -53.57% 1042.22%
Long-Term Debt Due $599.0M $553.0M $619.0M
YoY Change -43.17% -62.23% -22.91%
Total Short-Term Liabilities $4.240B $3.967B $4.030B
YoY Change 0.05% -10.73% -3.26%
LONG-TERM LIABILITIES
Long-Term Debt $11.61B $11.66B $11.29B
YoY Change 5.63% 1.43% -6.87%
Other Long-Term Liabilities $1.102B $1.103B $15.20B
YoY Change -15.81% -92.75% -0.55%
Total Long-Term Liabilities $12.72B $12.77B $26.48B
YoY Change 3.35% -52.21% -3.35%
TOTAL LIABILITIES
Total Short-Term Liabilities $4.240B $3.967B $4.030B
Total Long-Term Liabilities $12.72B $12.77B $26.48B
Total Liabilities $38.59B $36.91B $35.99B
YoY Change 5.86% -0.29% -2.28%
SHAREHOLDERS EQUITY
Retained Earnings $9.304B $9.128B
YoY Change 14.38%
Common Stock $9.006B $8.982B
YoY Change 0.93%
Preferred Stock
YoY Change
Treasury Stock (at cost) $2.327B $2.327B
YoY Change -0.04%
Treasury Stock Shares 35.00M shares 35.00M shares
Shareholders Equity $13.56B $13.96B $13.19B
YoY Change
Total Liabilities & Shareholders Equity $52.24B $50.95B $49.17B
YoY Change 6.22% 2.92% 0.4%

Cashflow Statement

Concept 2010 Q4 2010 Q3 2010 Q2
OPERATING ACTIVITIES
Net Income $524.0M $845.0M $445.0M
YoY Change -9.81% 11.62% -32.27%
Depreciation, Depletion And Amortization $688.0M $288.0M $279.0M
YoY Change 3.3% 19.01% -55.78%
Cash From Operating Activities $1.132B $1.743B $508.0M
YoY Change -22.73% 10.18% -53.69%
INVESTING ACTIVITIES
Capital Expenditures -$944.0M -$798.0M -$706.0M
YoY Change -7.54% -1.24% -3.55%
Acquisitions
YoY Change
Other Investing Activities -$913.0M $419.0M -$243.0M
YoY Change 1622.64% -1496.67% 291.94%
Cash From Investing Activities -$1.857B -$379.0M -$949.0M
YoY Change 72.91% -54.77% 19.52%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities -398.0M 203.0M -915.0M
YoY Change -47.28% -197.6% 49.02%
NET CHANGE
Cash From Operating Activities 1.132B 1.743B 508.0M
Cash From Investing Activities -1.857B -379.0M -949.0M
Cash From Financing Activities -398.0M 203.0M -915.0M
Net Change In Cash -1.123B 1.567B -1.356B
YoY Change 208.52% 192.35% 336.01%
FREE CASH FLOW
Cash From Operating Activities $1.132B $1.743B $508.0M
Capital Expenditures -$944.0M -$798.0M -$706.0M
Free Cash Flow $2.076B $2.541B $1.214B
YoY Change -16.49% 6.32% -33.62%

Facts In Submission

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CY2011 dei Entity Registrant Name
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EXELON CORP
CY2011 dei Entity Central Index Key
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CY2011 dei Document Type
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<p style='margin-top:0pt; margin-bottom:0pt'><font style="font-family:Arial;font-size:10pt;font-weight:bold;margin-left:0px;">1</font><font style="font-family:Arial;font-size:10pt;font-weight:bold;">. Significant Accounting Policies </font><font style="font-family:Arial;font-size:10pt;font-weight:bold;">(Exelon, Generation, ComEd and PECO)</font></p><p style='margin-top:0pt; margin-bottom:0pt'><font style="font-family:Times New Roman;font-size:7.5pt;margin-left:0px;">&#160;</font></p><p style='margin-top:0pt; margin-bottom:0pt'><font style="font-family:Arial;font-size:10pt;font-weight:bold;margin-left:0px;">Description of Business (Exelon, Generation, ComEd and PECO) </font></p><p style='margin-top:0pt; margin-bottom:0pt'><font style="font-family:Times New Roman;font-size:7.5pt;margin-left:0px;">&#160;</font></p><p style='margin-top:0pt; margin-bottom:0pt'><font style="font-family:Arial;font-size:10pt;margin-left:24.5px;">Exelon</font><font style="font-family:Arial;font-size:10pt;"> is a utility services holding company engaged, through its subsidiaries, in the generation and energy delivery businesses discussed below. The generation business consists of the electric generating facilities, the wholesale energy marketing operations and competitive retail supply operations of Generation. 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CY2011 us-gaap Reclassifications
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CY2011 us-gaap Future Amortization Expense Year One
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CY2010Q4 exc Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Liability Value
FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityValue
50000000 USD
CY2010 exc Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Liability Total Gain Loss Included In Earnings Attributed To Changes In Unrealized Gains Losses
FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityTotalGainLossIncludedInEarningsAttributedToChangesInUnrealizedGainsLosses
54000000 USD
CY2010 us-gaap Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases
FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases
28000000 USD
CY2010 us-gaap Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Sales
FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales
1000000 USD
CY2011 exc Derivative Gain Loss Reclassified To Earnings Net
DerivativeGainLossReclassifiedToEarningsNet
-32000000 USD
CY2010 exc Derivative Gain Loss Reclassified To Earnings Net
DerivativeGainLossReclassifiedToEarningsNet
-8000000 USD
CY2011Q4 exc Proceeds From Agreement Under Servicing Liability
ProceedsFromAgreementUnderServicingLiability
225000000 USD
CY2011Q4 us-gaap Interest Rate Fair Value Hedge Asset At Fair Value
InterestRateFairValueHedgeAssetAtFairValue
15000000 USD
CY2011Q4 us-gaap Interest Rate Derivative Assets At Fair Value
InterestRateDerivativeAssetsAtFairValue
15000000 USD
CY2011Q4 exc Energy Derivative Assets Noncurrent
EnergyDerivativeAssetsNoncurrent
650000000 USD
CY2011Q4 exc Total Mark To Market Derivative Assets
TotalMarkToMarketDerivativeAssets
1082000000 USD
CY2011Q4 exc Energy Derivative Liabilities Noncurrent
EnergyDerivativeLiabilitiesNoncurrent
107000000 USD
CY2011Q4 exc Total Mark To Market Derivative Liabilities
TotalMarkToMarketDerivativeLiabilities
219000000 USD
CY2011Q4 us-gaap Derivative Fair Value Of Derivative Net
DerivativeFairValueOfDerivativeNet
863000000 USD
CY2011Q4 exc Affiliate Derivative Assets Current
AffiliateDerivativeAssetsCurrent
0 USD
CY2011Q4 exc Affiliate Derivative Assets Noncurrent
AffiliateDerivativeAssetsNoncurrent
0 USD
CY2010Q4 exc Energy Derivative Assets Noncurrent
EnergyDerivativeAssetsNoncurrent
409000000 USD
CY2010Q4 exc Total Mark To Market Derivative Assets
TotalMarkToMarketDerivativeAssets
896000000 USD
CY2010Q4 exc Energy Derivative Liabilities Noncurrent
EnergyDerivativeLiabilitiesNoncurrent
21000000 USD
CY2010Q4 exc Total Mark To Market Derivative Liabilities
TotalMarkToMarketDerivativeLiabilities
59000000 USD
CY2010Q4 us-gaap Derivative Fair Value Of Derivative Net
DerivativeFairValueOfDerivativeNet
837000000 USD
CY2011 exc Other Derivatives Not Designated As Hedging Instruments Change In Fair Value
OtherDerivativesNotDesignatedAsHedgingInstrumentsChangeInFairValue
218000000 USD
CY2011 exc Other Derivatives Not Designated As Hedging Instruments Reclassification To Realized At Settlement
OtherDerivativesNotDesignatedAsHedgingInstrumentsReclassificationToRealizedAtSettlement
-515000000 USD
CY2011 exc Other Derivatives Not Designated As Hedging Instruments Gain Loss Net
OtherDerivativesNotDesignatedAsHedgingInstrumentsGainLossNet
-297000000 USD
CY2010 exc Other Derivatives Not Designated As Hedging Instruments Change In Fair Value
OtherDerivativesNotDesignatedAsHedgingInstrumentsChangeInFairValue
389000000 USD
CY2010 exc Other Derivatives Not Designated As Hedging Instruments Reclassification To Realized At Settlement
OtherDerivativesNotDesignatedAsHedgingInstrumentsReclassificationToRealizedAtSettlement
-304000000 USD
CY2010Q4 us-gaap Other Long Term Debt Current
OtherLongTermDebtCurrent
-599000000 USD
CY2011Q4 us-gaap Due To Related Parties Current And Noncurrent
DueToRelatedPartiesCurrentAndNoncurrent
390000000 USD
CY2010Q4 us-gaap Due To Related Parties Current And Noncurrent
DueToRelatedPartiesCurrentAndNoncurrent
390000000 USD
CY2010 exc Other Derivatives Not Designated As Hedging Instruments Gain Loss Net
OtherDerivativesNotDesignatedAsHedgingInstrumentsGainLossNet
85000000 USD
CY2009 exc Other Derivatives Not Designated As Hedging Instruments Change In Fair Value
OtherDerivativesNotDesignatedAsHedgingInstrumentsChangeInFairValue
134000000 USD
CY2009 exc Other Derivatives Not Designated As Hedging Instruments Reclassification To Realized At Settlement
OtherDerivativesNotDesignatedAsHedgingInstrumentsReclassificationToRealizedAtSettlement
62000000 USD
CY2009 exc Other Derivatives Not Designated As Hedging Instruments Gain Loss Net
OtherDerivativesNotDesignatedAsHedgingInstrumentsGainLossNet
196000000 USD
CY2011Q4 us-gaap Deferred Tax Liabilities Deferred Expense Deferred Financing Costs
DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts
37000000 USD
CY2011Q4 us-gaap Deferred Tax Liabilities Goodwill And Intangible Assets Goodwill
DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsGoodwill
0 USD
CY2011Q4 us-gaap Deferred Tax Liabilities Other
DeferredTaxLiabilitiesOther
-41000000 USD
CY2011Q4 exc Cash Collateral Received Not Offset Against Net Derivative Position
CashCollateralReceivedNotOffsetAgainstNetDerivativePosition
2000000 USD
CY2011 exc Hypothetical Ten Percent Increase
HypotheticalTenPercentIncrease
0.1 pure
CY2011Q4 us-gaap Notional Amount Of Interest Rate Fair Value Hedge Derivatives
NotionalAmountOfInterestRateFairValueHedgeDerivatives
100000000 USD
CY2010Q4 us-gaap Interest Rate Derivative Assets At Fair Value
InterestRateDerivativeAssetsAtFairValue
14000000 USD
CY2011 exc Change In Cash Flow Hedge Ineffectiveness
ChangeInCashFlowHedgeIneffectiveness
9000000 USD
CY2010 exc Change In Cash Flow Hedge Ineffectiveness
ChangeInCashFlowHedgeIneffectiveness
1000000 USD
CY2009 exc Change In Cash Flow Hedge Ineffectiveness
ChangeInCashFlowHedgeIneffectiveness
15000000 USD
CY2011Q4 exc Cash Flow Hedge Ineffectiveness Adjustment To Accumulated Other Comprehensive Income
CashFlowHedgeIneffectivenessAdjustmentToAccumulatedOtherComprehensiveIncome
-10000000 USD
CY2010Q4 exc Cash Flow Hedge Ineffectiveness Adjustment To Accumulated Other Comprehensive Income
CashFlowHedgeIneffectivenessAdjustmentToAccumulatedOtherComprehensiveIncome
-1000000 USD
CY2010 exc Cash Flow Hedge Gain Loss Reclassified To Pretax Net Income From Accumulated Other Comprehensive Income
CashFlowHedgeGainLossReclassifiedToPretaxNetIncomeFromAccumulatedOtherComprehensiveIncome
754000000 USD
CY2011 exc Cash Flow Hedge Gain Loss Reclassified To Pretax Net Income From Accumulated Other Comprehensive Income
CashFlowHedgeGainLossReclassifiedToPretaxNetIncomeFromAccumulatedOtherComprehensiveIncome
512000000 USD
CY2009 exc Cash Flow Hedge Gain Loss Reclassified To Pretax Net Income From Accumulated Other Comprehensive Income
CashFlowHedgeGainLossReclassifiedToPretaxNetIncomeFromAccumulatedOtherComprehensiveIncome
1292000000 USD
CY2010Q4 exc Cash Collateral Received Not Offset Against Net Derivative Position
CashCollateralReceivedNotOffsetAgainstNetDerivativePosition
1000000 USD
CY2010Q4 us-gaap Notional Amount Of Interest Rate Fair Value Hedge Derivatives
NotionalAmountOfInterestRateFairValueHedgeDerivatives
100000000 USD
CY2011Q4 us-gaap Commercial Paper
CommercialPaper
161000000 USD
CY2010Q4 us-gaap Commercial Paper
CommercialPaper
0 USD
CY2009 exc Effective Income Tax Rate Reconciliation Nontaxable Postretirement Benefits
EffectiveIncomeTaxRateReconciliationNontaxablePostretirementBenefits
0.002 pure
CY2009 exc Effective Income Tax Rate Reconciliation Qualified Nuclear Decommissioning Trust Fund Income Losses
EffectiveIncomeTaxRateReconciliationQualifiedNuclearDecommissioningTrustFundIncomeLosses
-0.031 pure
CY2009 us-gaap Effective Income Tax Rate Reconciliation Other Adjustments
EffectiveIncomeTaxRateReconciliationOtherAdjustments
0.001 pure
CY2011Q4 exc Aggregate Bank Commitments Under Unsecured Revolving Credit Facilities
AggregateBankCommitmentsUnderUnsecuredRevolvingCreditFacilities
7700000000 USD
CY2011Q4 us-gaap Line Of Credit Facility Amount Outstanding
LineOfCreditFacilityAmountOutstanding
0 USD
CY2011Q4 exc Letters Of Credit
LettersOfCredit
885000000 USD
CY2011Q4 exc Unsecured Revolving Credit Facilities Available Capacity
UnsecuredRevolvingCreditFacilitiesAvailableCapacity
6815000000 USD
CY2011Q4 exc Unsecured Revolving Credit Facilities Available Capacity To Support Commercial Paper Issuance
UnsecuredRevolvingCreditFacilitiesAvailableCapacityToSupportCommercialPaperIssuance
6654000000 USD
CY2010 us-gaap Shortterm Debt Average Outstanding Amount
ShorttermDebtAverageOutstandingAmount
125000000 USD
CY2010 us-gaap Shortterm Debt Maximum Amount Outstanding During Period
ShorttermDebtMaximumAmountOutstandingDuringPeriod
346000000 USD
CY2009 us-gaap Shortterm Debt Average Outstanding Amount
ShorttermDebtAverageOutstandingAmount
132000000 USD
CY2009 us-gaap Shortterm Debt Maximum Amount Outstanding During Period
ShorttermDebtMaximumAmountOutstandingDuringPeriod
523000000 USD
CY2009Q4 exc Average Interest Rate At Period End
AverageInterestRateAtPeriodEnd
0.000069 pure
CY2011 us-gaap Shortterm Debt Average Outstanding Amount
ShorttermDebtAverageOutstandingAmount
218000000 USD
CY2011 us-gaap Shortterm Debt Maximum Amount Outstanding During Period
ShorttermDebtMaximumAmountOutstandingDuringPeriod
600000000 USD
CY2011Q4 exc Average Interest Rate At Period End
AverageInterestRateAtPeriodEnd
0.000044 pure
CY2010 exc Average Interest Rate Computed On Daily Basis
AverageInterestRateComputedOnDailyBasis
0.000072 pure
CY2009 exc Average Interest Rate Computed On Daily Basis
AverageInterestRateComputedOnDailyBasis
0.000073 pure
CY2011Q4 exc Basis Points For Prime Based Borrowings
BasisPointsForPrimeBasedBorrowings
85 BasisPoints
CY2011Q4 exc Basis Points For Libor Based Borrowings
BasisPointsForLiborBasedBorrowings
130 BasisPoints
CY2011Q4 exc Debt Covenant Minimum Threshold
DebtCovenantMinimumThreshold
2.50 CreditAgreementThreshold
CY2011Q4 exc Debt Covenant Actual
DebtCovenantActual
15.60 CreditAgreementThreshold
CY2011Q4 exc Long Term Debt Excluding Related Party Debt
LongTermDebtExcludingRelatedPartyDebt
12644000000 USD
CY2010Q4 exc Long Term Debt Excluding Related Party Debt
LongTermDebtExcludingRelatedPartyDebt
12234000000 USD
CY2011Q4 us-gaap Debt Instrument Unamortized Discount Premium Net
DebtInstrumentUnamortizedDiscountPremiumNet
32000000 USD
CY2010Q4 us-gaap Debt Instrument Unamortized Discount Premium Net
DebtInstrumentUnamortizedDiscountPremiumNet
34000000 USD
CY2011Q4 exc Unamortized Settled Fair Value Hedge Net
UnamortizedSettledFairValueHedgeNet
0 USD
CY2010Q4 exc Unamortized Settled Fair Value Hedge Net
UnamortizedSettledFairValueHedgeNet
1000000 USD
CY2011Q4 exc Fair Value Carrying Value Adjustment Net
FairValueCarryingValueAdjustmentNet
-15000000 USD
CY2010Q4 exc Fair Value Carrying Value Adjustment Net
FairValueCarryingValueAdjustmentNet
-14000000 USD
CY2011Q4 us-gaap Other Long Term Debt Current
OtherLongTermDebtCurrent
-828000000 USD
CY2011Q4 us-gaap Long Term Debt Maturities Repayments Of Principal In Next Twelve Months
LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
828000000 USD
CY2011Q4 us-gaap Long Term Debt Maturities Repayments Of Principal In Year Two
LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
555000000 USD
CY2011Q4 us-gaap Long Term Debt Maturities Repayments Of Principal In Year Three
LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
1370000000 USD
CY2011Q4 us-gaap Long Term Debt Maturities Repayments Of Principal In Year Four
LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
1063000000 USD
CY2011Q4 us-gaap Long Term Debt Maturities Repayments Of Principal In Year Five
LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive
669000000 USD
CY2011Q4 us-gaap Long Term Debt Maturities Repayments Of Principal After Year Five
LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive
8549000000 USD
CY2011Q4 us-gaap Long Term Debt
LongTermDebt
13034000000 USD
CY2011Q4 exc Long Term Debt Maturities Repayments Of Principal After Year Five Due To Related Party
LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFiveDueToRelatedParty
390000000 USD
CY2011 exc Doe Loan Guarantee
DoeLoanGuarantee
646000000 USD
CY2011 exc Doe Interest Rate Swap
DoeInterestRateSwap
485000000 USD
CY2011 exc Doe Letters Of Credit Outstanding Support
DoeLettersOfCreditOutstandingSupport
690000000 USD
CY2011 exc Doe Letters Of Credit Issued Support
DoeLettersOfCreditIssuedSupport
635000000 USD
CY2011 exc Basis Points Spread For Doe Loan Advance
BasisPointsSpreadForDoeLoanAdvance
37 BasisPoints
CY2011 exc Effective Income Tax Rate Reconciliation Plant Basis Differences
EffectiveIncomeTaxRateReconciliationPlantBasisDifferences
0.01 pure
CY2011 us-gaap Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate
EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
0.35 pure
CY2011 us-gaap Effective Income Tax Rate Reconciliation Tax Credits Investment
EffectiveIncomeTaxRateReconciliationTaxCreditsInvestment
0.003 pure
CY2011 us-gaap Effective Income Tax Rate Continuing Operations
EffectiveIncomeTaxRateContinuingOperations
0.369 pure
CY2011 exc Effective Income Tax Rate Reconciliation Qualified Nuclear Decommissioning Trust Fund Income Losses
EffectiveIncomeTaxRateReconciliationQualifiedNuclearDecommissioningTrustFundIncomeLosses
-0.005 pure
CY2011 us-gaap Effective Income Tax Rate Reconciliation Deductions Qualified Production Activities
EffectiveIncomeTaxRateReconciliationDeductionsQualifiedProductionActivities
0.003 pure
CY2011 us-gaap Effective Income Tax Rate Reconciliation Tax Exempt Income
EffectiveIncomeTaxRateReconciliationTaxExemptIncome
0.002 pure
CY2011 us-gaap Effective Income Tax Rate Reconciliation State And Local Income Taxes
EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
-0.044 pure
CY2011 exc Effective Income Tax Rate Reconciliation Uncertain Tax Position Remeasurement
EffectiveIncomeTaxRateReconciliationUncertainTaxPositionRemeasurement
0 pure
CY2011 us-gaap Effective Income Tax Rate Reconciliation Other Adjustments
EffectiveIncomeTaxRateReconciliationOtherAdjustments
0.001 pure
CY2011 exc Effective Income Tax Rate Reconciliation Elimination Of Deductions Medicare Prescription Drug Benefit
EffectiveIncomeTaxRateReconciliationEliminationOfDeductionsMedicarePrescriptionDrugBenefit
0.002 pure
CY2010 us-gaap Effective Income Tax Rate Reconciliation Tax Credits Investment
EffectiveIncomeTaxRateReconciliationTaxCreditsInvestment
0.003 pure
CY2010 exc Effective Income Tax Rate Reconciliation Plant Basis Differences
EffectiveIncomeTaxRateReconciliationPlantBasisDifferences
0 pure
CY2010 us-gaap Effective Income Tax Rate Continuing Operations
EffectiveIncomeTaxRateContinuingOperations
0.393 pure
CY2010 exc Effective Income Tax Rate Reconciliation Qualified Nuclear Decommissioning Trust Fund Income Losses
EffectiveIncomeTaxRateReconciliationQualifiedNuclearDecommissioningTrustFundIncomeLosses
-0.017 pure
CY2010 us-gaap Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate
EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
0.35 pure
CY2010 us-gaap Effective Income Tax Rate Reconciliation State And Local Income Taxes
EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
-0.03 pure
CY2010 exc Effective Income Tax Rate Reconciliation Nontaxable Postretirement Benefits
EffectiveIncomeTaxRateReconciliationNontaxablePostretirementBenefits
0 pure
CY2010 us-gaap Effective Income Tax Rate Reconciliation Tax Exempt Income
EffectiveIncomeTaxRateReconciliationTaxExemptIncome
0.001 pure
CY2010 us-gaap Effective Income Tax Rate Reconciliation Deductions Qualified Production Activities
EffectiveIncomeTaxRateReconciliationDeductionsQualifiedProductionActivities
0.012 pure
CY2010 us-gaap Effective Income Tax Rate Reconciliation Other Adjustments
EffectiveIncomeTaxRateReconciliationOtherAdjustments
0.002 pure
CY2009 us-gaap Effective Income Tax Rate Reconciliation State And Local Income Taxes
EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
-0.021 pure
CY2009 us-gaap Effective Income Tax Rate Reconciliation Deductions Qualified Production Activities
EffectiveIncomeTaxRateReconciliationDeductionsQualifiedProductionActivities
0.009 pure
CY2009 us-gaap Effective Income Tax Rate Reconciliation Tax Credits Investment
EffectiveIncomeTaxRateReconciliationTaxCreditsInvestment
0.002 pure
CY2009 us-gaap Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate
EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
0.35 pure
CY2011Q4 us-gaap Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets
DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets
0 USD
CY2009 exc Effective Income Tax Rate Reconciliation Plant Basis Differences
EffectiveIncomeTaxRateReconciliationPlantBasisDifferences
0 pure
CY2009 us-gaap Effective Income Tax Rate Reconciliation Tax Exempt Income
EffectiveIncomeTaxRateReconciliationTaxExemptIncome
0.001 pure
CY2009 us-gaap Effective Income Tax Rate Continuing Operations
EffectiveIncomeTaxRateContinuingOperations
0.387 pure
CY2010 exc Effective Income Tax Rate Reconciliation Elimination Of Deductions Medicare Prescription Drug Benefit
EffectiveIncomeTaxRateReconciliationEliminationOfDeductionsMedicarePrescriptionDrugBenefit
-0.014 pure
CY2010 exc Effective Income Tax Rate Reconciliation Uncertain Tax Position Remeasurement
EffectiveIncomeTaxRateReconciliationUncertainTaxPositionRemeasurement
0 pure
CY2011 us-gaap Effective Income Tax Rate Reconciliation Deductions Other
EffectiveIncomeTaxRateReconciliationDeductionsOther
0.009 pure
CY2011Q4 us-gaap Deferred Tax Liabilities Property Plant And Equipment
DeferredTaxLiabilitiesPropertyPlantAndEquipment
7803000000 USD
CY2011Q4 exc Deferred Tax Liabilities Stranded Asset Costs Recovery
DeferredTaxLiabilitiesStrandedAssetCostsRecovery
0 USD
CY2011Q4 us-gaap Deferred Tax Liabilities Derivatives
DeferredTaxLiabilitiesDerivatives
468000000 USD
CY2011Q4 exc Deferred Tax Liabilities Deferred Pension And Other Postretirement Benefit Obligation
DeferredTaxLiabilitiesDeferredPensionAndOtherPostretirementBenefitObligation
-665000000 USD
CY2011Q4 us-gaap Deferred Income Tax Liabilities
DeferredIncomeTaxLiabilities
8054000000 USD
CY2011Q4 us-gaap Accumulated Deferred Investment Tax Credit
AccumulatedDeferredInvestmentTaxCredit
200000000 USD
CY2011Q4 exc Deferred Income Tax Liabilities And Accumulated Deferred Investment Tax Credit
DeferredIncomeTaxLiabilitiesAndAccumulatedDeferredInvestmentTaxCredit
8254000000 USD
CY2010Q4 us-gaap Deferred Income Tax Liabilities
DeferredIncomeTaxLiabilities
6494000000 USD
CY2010Q4 us-gaap Accumulated Deferred Investment Tax Credit
AccumulatedDeferredInvestmentTaxCredit
212000000 USD
CY2010Q4 exc Deferred Income Tax Liabilities And Accumulated Deferred Investment Tax Credit
DeferredIncomeTaxLiabilitiesAndAccumulatedDeferredInvestmentTaxCredit
6706000000 USD
CY2010Q4 us-gaap Deferred Tax Liabilities Property Plant And Equipment
DeferredTaxLiabilitiesPropertyPlantAndEquipment
5931000000 USD
CY2010Q4 exc Deferred Tax Liabilities Stranded Asset Costs Recovery
DeferredTaxLiabilitiesStrandedAssetCostsRecovery
0 USD
CY2010Q4 us-gaap Deferred Tax Liabilities Derivatives
DeferredTaxLiabilitiesDerivatives
523000000 USD
CY2010Q4 exc Deferred Tax Liabilities Deferred Pension And Other Postretirement Benefit Obligation
DeferredTaxLiabilitiesDeferredPensionAndOtherPostretirementBenefitObligation
-485000000 USD
CY2010Q4 us-gaap Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets
DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets
0 USD
CY2010Q4 exc Deferred Tax Liabilities Nuclear Decommissioning Activities
DeferredTaxLiabilitiesNuclearDecommissioningActivities
444000000 USD
CY2010Q4 us-gaap Deferred Tax Liabilities Deferred Expense Deferred Financing Costs
DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts
46000000 USD
CY2010Q4 us-gaap Deferred Tax Liabilities Goodwill And Intangible Assets Goodwill
DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsGoodwill
-4000000 USD
CY2010Q4 us-gaap Deferred Tax Liabilities Other
DeferredTaxLiabilitiesOther
39000000 USD
CY2011Q4 exc Deferred Tax Liabilities Nuclear Decommissioning Activities
DeferredTaxLiabilitiesNuclearDecommissioningActivities
452000000 USD
CY2011Q4 us-gaap Deferred Tax Assets Operating Loss Carryforwards State And Local
DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal
679000000 USD
CY2011Q4 exc Deferred Tax Assets Operating Loss Carryforwards State And Local Deferred Taxes
DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocalDeferredTaxes
31000000 USD
CY2011Q4 exc Deferred Tax Assets Operating Loss Carryforwards State And Local Valuation Allowance
DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocalValuationAllowance
10000000 USD
CY2010Q4 us-gaap Unrecognized Tax Benefits
UnrecognizedTaxBenefits
787000000 USD
CY2011Q4 us-gaap Unrecognized Tax Benefits
UnrecognizedTaxBenefits
807000000 USD
CY2009Q4 us-gaap Unrecognized Tax Benefits
UnrecognizedTaxBenefits
1498000000 USD
CY2008Q4 us-gaap Unrecognized Tax Benefits
UnrecognizedTaxBenefits
1495000000 USD
CY2011 us-gaap Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions
UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions
5000000 USD
CY2011 us-gaap Unrecognized Tax Benefits Decreases Resulting From Current Period Tax Positions
UnrecognizedTaxBenefitsDecreasesResultingFromCurrentPeriodTaxPositions
0 USD
CY2011 exc Unrecognized Tax Benefits Increases Decreases Only Affecting Timing
UnrecognizedTaxBenefitsIncreasesDecreasesOnlyAffectingTiming
21000000 USD
CY2011 exc Pension And Other Postretirement Benefit Expense Included In Capital And Operating And Maintenance Expense
PensionAndOtherPostretirementBenefitExpenseIncludedInCapitalAndOperatingAndMaintenanceExpense
542000000 USD
CY2011 us-gaap Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities
UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities
0 USD
CY2011 us-gaap Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations
UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations
3000000 USD
CY2010 us-gaap Unrecognized Tax Benefits Decreases Resulting From Current Period Tax Positions
UnrecognizedTaxBenefitsDecreasesResultingFromCurrentPeriodTaxPositions
2000000 USD
CY2010 exc Unrecognized Tax Benefits Increases Decreases Only Affecting Timing
UnrecognizedTaxBenefitsIncreasesDecreasesOnlyAffectingTiming
-262000000 USD
CY2010 us-gaap Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions
UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions
8000000 USD
CY2009 exc Unrecognized Tax Benefits Increases Decreases Only Affecting Timing
UnrecognizedTaxBenefitsIncreasesDecreasesOnlyAffectingTiming
19000000 USD
CY2009 us-gaap Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities
UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities
18000000 USD
CY2009 us-gaap Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations
UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations
0 USD
CY2010 us-gaap Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions
UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions
1000000 USD
CY2010 us-gaap Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions
UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions
3000000 USD
CY2010 us-gaap Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities
UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities
452000000 USD
CY2010 us-gaap Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations
UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations
1000000 USD
CY2009 us-gaap Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions
UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions
4000000 USD
CY2009 us-gaap Unrecognized Tax Benefits Decreases Resulting From Current Period Tax Positions
UnrecognizedTaxBenefitsDecreasesResultingFromCurrentPeriodTaxPositions
2000000 USD
CY2011 us-gaap Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions
UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions
3000000 USD
CY2011 exc Unrecognized Tax Benefits For Which Timing Of Ultimate Benefits Uncertain
UnrecognizedTaxBenefitsForWhichTimingOfUltimateBenefitsUncertain
804000000 USD
CY2010 exc Unrecognized Tax Benefits For Which Timing Of Ultimate Benefits Uncertain
UnrecognizedTaxBenefitsForWhichTimingOfUltimateBenefitsUncertain
783000000 USD
CY2010Q4 us-gaap Unrecognized Tax Benefits That Would Impact Effective Tax Rate
UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate
4000000 USD
CY2011Q4 us-gaap Unrecognized Tax Benefits That Would Impact Effective Tax Rate
UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate
3000000 USD
CY2011Q4 exc Net Interest Receivable Payable Related To Uncertain Tax Positions
NetInterestReceivablePayableRelatedToUncertainTaxPositions
74000000 USD
CY2010Q4 exc Net Interest Receivable Payable Related To Uncertain Tax Positions
NetInterestReceivablePayableRelatedToUncertainTaxPositions
21000000 USD
CY2011 exc Net Interest Income Expense Related To Uncertain Tax Positions
NetInterestIncomeExpenseRelatedToUncertainTaxPositions
-56000000 USD
CY2010 exc Net Interest Income Expense Related To Uncertain Tax Positions
NetInterestIncomeExpenseRelatedToUncertainTaxPositions
110000000 USD
CY2009 exc Net Interest Income Expense Related To Uncertain Tax Positions
NetInterestIncomeExpenseRelatedToUncertainTaxPositions
-42000000 USD
CY2011 exc Repair Costs Income Tax
RepairCostsIncomeTax
210000000 USD
CY2010 exc Repair Costs Income Tax
RepairCostsIncomeTax
160000000 USD
CY2011Q4 exc Deferred Income Tax Gain On Sale Of Assets
DeferredIncomeTaxGainOnSaleOfAssets
2800000000 USD
CY2010 exc Unrecognized Tax Benefits Income Tax Penalties Expense Involuntary Conversion
UnrecognizedTaxBenefitsIncomeTaxPenaltiesExpenseInvoluntaryConversion
110000000 USD
CY2011 exc Unrecognized Tax Benefits Income Tax Penalties Expense Like Kind Exchange
UnrecognizedTaxBenefitsIncomeTaxPenaltiesExpenseLikeKindExchange
86000000 USD
CY2011Q4 exc Preliminary Tax Settlement Tax Assessed
PreliminaryTaxSettlementTaxAssessed
300000000 USD
CY2011Q4 us-gaap Income Tax Examination Liability Refund Adjustment From Settlement With Taxing Authority
IncomeTaxExaminationLiabilityRefundAdjustmentFromSettlementWithTaxingAuthority
300000000 USD
CY2011Q4 exc Deferred Income Tax Gain In Voluntary Conversion
DeferredIncomeTaxGainInVoluntaryConversion
1600000000 USD
CY2011 exc Deferred Income Tax Gain Like Kind Exchange
DeferredIncomeTaxGainLikeKindExchange
1200000000 USD
CY2010 exc Remeasurement Interest Expense
RemeasurementInterestExpense
65000000 USD
CY2011Q4 exc Income Tax And Penalties From Potential Settle With Taxing Authority
IncomeTaxAndPenaltiesFromPotentialSettleWithTaxingAuthority
860000000 USD
CY2011Q4 exc Income Tax Examination Interest Expense From Potential Settlement With Taxing Authority
IncomeTaxExaminationInterestExpenseFromPotentialSettlementWithTaxingAuthority
260000000 USD
CY2009 exc Remeasurement Interest Expense
RemeasurementInterestExpense
-31000000 USD
CY2009 us-gaap Unrecognized Tax Benefits Income Tax Penalties Expense
UnrecognizedTaxBenefitsIncomeTaxPenaltiesExpense
196000000 USD
CY2010 exc Preliminary Settlement Payment To Irs
PreliminarySettlementPaymentToIrs
302000000 USD
CY2009 exc Deferred State And Local Income Tax Expense Benefit State Tax Apportionment
DeferredStateAndLocalIncomeTaxExpenseBenefitStateTaxApportionment
35000000 USD
CY2010 exc Effective Income Tax Rate Reconciliation At State Statutory Income Tax Rate
EffectiveIncomeTaxRateReconciliationAtStateStatutoryIncomeTaxRate
0.073 pure
CY2011 exc Effective Income Tax Rate Reconciliation Change In Enacted State Statutory Income Tax Rate
EffectiveIncomeTaxRateReconciliationChangeInEnactedStateStatutoryIncomeTaxRate
0.095 pure
CY2011 exc Electric Transmission Distribution Property Repairs Deduction Cash Benefit Detriment
ElectricTransmissionDistributionPropertyRepairsDeductionCashBenefitDetriment
300000000 USD
CY2011Q1 exc State Tax Bonus Depreciation Expense Benefit
StateTaxBonusDepreciationExpenseBenefit
7000000 USD
CY2011 exc State Tax Bonus Depreciation Percent
StateTaxBonusDepreciationPercent
1 pure
CY2011 exc Effective Income Tax Rate Reconciliation Change In Enacted State Statutory Income Tax Rate
EffectiveIncomeTaxRateReconciliationChangeInEnactedStateStatutoryIncomeTaxRate
0.095 USD
CY2011 exc Nuclear Decommissioning Trust Fund Special Transfer Tax Deduction Benefit
NuclearDecommissioningTrustFundSpecialTransferTaxDeductionBenefit
46000000 USD
CY2011 us-gaap Deferred Other Tax Expense Benefit
DeferredOtherTaxExpenseBenefit
7000000 USD
CY2011Q4 exc Effective Income Tax Rate Reconciliation Impact Of Change In Enacted State Statutory Income Tax Rate
EffectiveIncomeTaxRateReconciliationImpactOfChangeInEnactedStateStatutoryIncomeTaxRate
7000000 USD
CY2011Q1 exc Deferred State And Local Income Tax Expense Benefit State Tax Apportionment
DeferredStateAndLocalIncomeTaxExpenseBenefitStateTaxApportionment
-22000000 USD
CY2011 exc Deferred State And Local Income Tax Expense Benefit State Tax Apportionment
DeferredStateAndLocalIncomeTaxExpenseBenefitStateTaxApportionment
-1000000 USD
CY2009Q4 exc Nuclear Asset Retirement Obligation
NuclearAssetRetirementObligation
3260000000 USD
CY2010 exc Nuclear Asset Retirement Obligation Accretion Expense
NuclearAssetRetirementObligationAccretionExpense
191000000 USD
CY2010 exc Nuclear Asset Retirement Obligation Revision Of Estimate
NuclearAssetRetirementObligationRevisionOfEstimate
624000000 USD
CY2010 exc Nuclear Asset Retirement Obligation Liabilities Settled
NuclearAssetRetirementObligationLiabilitiesSettled
31000000 USD
CY2011 exc Nuclear Asset Retirement Obligation Accretion Expense
NuclearAssetRetirementObligationAccretionExpense
209000000 USD
CY2011 exc Nuclear Asset Retirement Obligation Revision Of Estimate
NuclearAssetRetirementObligationRevisionOfEstimate
198000000 USD
CY2011 exc Nuclear Asset Retirement Obligation Liabilities Settled
NuclearAssetRetirementObligationLiabilitiesSettled
3000000 USD
CY2010Q4 exc Nuclear Asset Retirement Obligation
NuclearAssetRetirementObligation
3276000000 USD
CY2011Q4 exc Nuclear Asset Retirement Obligation
NuclearAssetRetirementObligation
3680000000 USD
CY2011Q4 us-gaap Securities Received As Collateral
SecuritiesReceivedAsCollateral
17000000 USD
CY2011Q4 us-gaap Obligation To Return Securities Received As Collateral
ObligationToReturnSecuritiesReceivedAsCollateral
17000000 USD
CY2010 exc Nuclear Asset Retirement Obligation Extinguishment
NuclearAssetRetirementObligationExtinguishment
768000000 USD
CY2011Q4 us-gaap Asset Retirement Obligation Current
AssetRetirementObligationCurrent
5000000 USD
CY2011Q4 exc Net Adjustment To Nuclear Asset Retirement Obligation
NetAdjustmentToNuclearAssetRetirementObligation
16000000 USD
CY2011Q4 exc Zionsolutions Rent Payable
ZionsolutionsRentPayable
1 USD
CY2011Q4 exc Energysolutions Letter Of Credit
EnergysolutionsLetterOfCredit
200000000 USD
CY2011 exc Nuclear Decommissioning Trust Fund Equity Percent
NuclearDecommissioningTrustFundEquityPercent
0.57 pure
CY2011 exc Nuclear Decommissioning Trust Fund Fixed Income Securities Percent
NuclearDecommissioningTrustFundFixedIncomeSecuritiesPercent
0.43 pure
CY2011 exc Annual After Tax Return On Nuclear Decommissioning Fund
AnnualAfterTaxReturnOnNuclearDecommissioningFund
0.02 pure
CY2011 exc Annual After Tax Return On Nuclear Decommissioning Fund Former Peco Units
AnnualAfterTaxReturnOnNuclearDecommissioningFundFormerPecoUnits
0.03 pure
CY2011 exc Annual Average After Tax Return Nuclear Decommissioning Funds Historical
AnnualAverageAfterTaxReturnNuclearDecommissioningFundsHistorical
0.036 pure
CY2011 exc Unrealized Gain Loss Investment Income Nuclear Decommissioning Trust Funds Regulatory Accounting
UnrealizedGainLossInvestmentIncomeNuclearDecommissioningTrustFundsRegulatoryAccounting
-74000000 USD
CY2010 exc Unrealized Gain Loss Investment Income Nuclear Decommissioning Trust Funds Regulatory Accounting
UnrealizedGainLossInvestmentIncomeNuclearDecommissioningTrustFundsRegulatoryAccounting
294000000 USD
CY2009 exc Unrealized Gain Loss Investment Income Nuclear Decommissioning Trust Funds Regulatory Accounting
UnrealizedGainLossInvestmentIncomeNuclearDecommissioningTrustFundsRegulatoryAccounting
799000000 USD
CY2011 exc Unrealized Gain Loss Investment Income Nuclear Decommissioning Trust Funds Nonregulatory Accounting
UnrealizedGainLossInvestmentIncomeNuclearDecommissioningTrustFundsNonregulatoryAccounting
-4000000 USD
CY2010 exc Unrealized Gain Loss Investment Income Nuclear Decommissioning Trust Funds Nonregulatory Accounting
UnrealizedGainLossInvestmentIncomeNuclearDecommissioningTrustFundsNonregulatoryAccounting
104000000 USD
CY2009 exc Unrealized Gain Loss Investment Income Nuclear Decommissioning Trust Funds Nonregulatory Accounting
UnrealizedGainLossInvestmentIncomeNuclearDecommissioningTrustFundsNonregulatoryAccounting
227000000 USD
CY2011 exc Unrealized Gain Loss Investment Income Zion Station Pledged Assets
UnrealizedGainLossInvestmentIncomeZionStationPledgedAssets
20000000 USD
CY2009Q4 us-gaap Asset Retirement Obligation
AssetRetirementObligation
191000000 USD
CY2010 us-gaap Asset Retirement Obligation Revision Of Estimate
AssetRetirementObligationRevisionOfEstimate
13000000 USD
CY2010 us-gaap Asset Retirement Obligation Liabilities Settled
AssetRetirementObligationLiabilitiesSettled
3000000 USD
CY2010Q4 us-gaap Asset Retirement Obligation
AssetRetirementObligation
223000000 USD
CY2011 us-gaap Asset Retirement Obligation Revision Of Estimate
AssetRetirementObligationRevisionOfEstimate
-19000000 USD
CY2011 us-gaap Asset Retirement Obligation Liabilities Settled
AssetRetirementObligationLiabilitiesSettled
5000000 USD
CY2011Q4 us-gaap Asset Retirement Obligation
AssetRetirementObligation
209000000 USD
CY2010 exc Non Nuclear Asset Retirement Obligation Accretion Expense
NonNuclearAssetRetirementObligationAccretionExpense
-9000000 USD
CY2011 exc Non Nuclear Asset Retirement Obligation Accretion Expense
NonNuclearAssetRetirementObligationAccretionExpense
-8000000 USD
CY2010 exc Asset Retirement Obligation Liabilities Purchased
AssetRetirementObligationLiabilitiesPurchased
13000000 USD
CY2011 exc Asset Retirement Obligation Liabilities Purchased
AssetRetirementObligationLiabilitiesPurchased
2000000 USD
CY2011 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate
ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
0.000265 pure
CY2010 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate
ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
0.000296 pure
CY2011Q4 us-gaap Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Projected Benefit Obligation
DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation
13538000000 USD
CY2011Q4 exc Defined Benefit Plan Pension Plans With Projected Benefit Obligations In Excess Of Plan Assets Aggregate Projected Benefit Obligation
DefinedBenefitPlanPensionPlansWithProjectedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation
13538000000 USD
CY2010Q4 exc Defined Benefit Plan Pension Plans With Projected Benefit Obligations In Excess Of Plan Assets Aggregate Projected Benefit Obligation
DefinedBenefitPlanPensionPlansWithProjectedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation
12524000000 USD
CY2010Q4 us-gaap Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Projected Benefit Obligation
DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation
12524000000 USD
CY2011Q4 us-gaap Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Accumulated Benefit Obligation
DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation
12616000000 USD
CY2011Q4 exc Defined Benefit Plan Pension Plans With Projected Benefit Obligations In Excess Of Plan Assets Aggregate Accumulated Benefit Obligation
DefinedBenefitPlanPensionPlansWithProjectedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation
12616000000 USD
CY2010Q4 exc Defined Benefit Plan Pension Plans With Projected Benefit Obligations In Excess Of Plan Assets Aggregate Accumulated Benefit Obligation
DefinedBenefitPlanPensionPlansWithProjectedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation
11697000000 USD
CY2010Q4 us-gaap Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Accumulated Benefit Obligation
DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation
11697000000 USD
CY2011Q4 us-gaap Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Fair Value Of Plan Assets
DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets
11302000000 USD
CY2011Q4 exc Defined Benefit Plan Pension Plans With Projected Benefit Obligations In Excess Of Plan Assets Aggregate Fair Value Of Plan Assets
DefinedBenefitPlanPensionPlansWithProjectedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets
11302000000 USD
CY2010Q4 exc Defined Benefit Plan Pension Plans With Projected Benefit Obligations In Excess Of Plan Assets Aggregate Fair Value Of Plan Assets
DefinedBenefitPlanPensionPlansWithProjectedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets
8859000000 USD
CY2010Q4 us-gaap Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Fair Value Of Plan Assets
DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets
8859000000 USD
CY2010 exc Pension And Other Postretirement Benefit Expense Included In Capital And Operating And Maintenance Expense
PensionAndOtherPostretirementBenefitExpenseIncludedInCapitalAndOperatingAndMaintenanceExpense
581000000 USD
CY2009 exc Pension And Other Postretirement Benefit Expense Included In Capital And Operating And Maintenance Expense
PensionAndOtherPostretirementBenefitExpenseIncludedInCapitalAndOperatingAndMaintenanceExpense
536000000 USD
CY2011Q4 exc Percentage Of Collateral For Borrowed Securities In Domestic Currency
PercentageOfCollateralForBorrowedSecuritiesInDomesticCurrency
1.02 pure
CY2011Q4 exc Percentage Of Collateral For Borrowed Securities In Foreign Currency
PercentageOfCollateralForBorrowedSecuritiesInForeignCurrency
1.05 pure
CY2011Q4 exc Percentage Of Collateral For Borrowed Securities Required Levels
PercentageOfCollateralForBorrowedSecuritiesRequiredLevels
1.00 pure
CY2011Q4 exc Pending Asset Sales Transactions Excluded From Pension And Opeb
PendingAssetSalesTransactionsExcludedFromPensionAndOpeb
57000000 USD
CY2009 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate
ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
0.000201 pure
CY2011Q4 exc Prescription Drug Benefit Effect Of Subsidy On Net Periodic Postretirement Benefit Cost Amortization Of Actuarial Experience Gain Loss
PrescriptionDrugBenefitEffectOfSubsidyOnNetPeriodicPostretirementBenefitCostAmortizationOfActuarialExperienceGainLoss
3000000 USD
CY2010Q4 exc Prescription Drug Benefit Effect Of Subsidy On Net Periodic Postretirement Benefit Cost Amortization Of Actuarial Experience Gain Loss
PrescriptionDrugBenefitEffectOfSubsidyOnNetPeriodicPostretirementBenefitCostAmortizationOfActuarialExperienceGainLoss
9000000 USD
CY2009Q4 exc Prescription Drug Benefit Effect Of Subsidy On Net Periodic Postretirement Benefit Cost Amortization Of Actuarial Experience Gain Loss
PrescriptionDrugBenefitEffectOfSubsidyOnNetPeriodicPostretirementBenefitCostAmortizationOfActuarialExperienceGainLoss
11000000 USD
CY2011Q4 exc Prescription Drug Benefit Effect Of Subsidy On Net Periodic Postretirement Benefit Cost Reduction In Service Cost
PrescriptionDrugBenefitEffectOfSubsidyOnNetPeriodicPostretirementBenefitCostReductionInServiceCost
9000000 USD
CY2010Q4 exc Prescription Drug Benefit Effect Of Subsidy On Net Periodic Postretirement Benefit Cost Reduction In Service Cost
PrescriptionDrugBenefitEffectOfSubsidyOnNetPeriodicPostretirementBenefitCostReductionInServiceCost
10000000 USD
CY2009Q4 exc Prescription Drug Benefit Effect Of Subsidy On Net Periodic Postretirement Benefit Cost Reduction In Service Cost
PrescriptionDrugBenefitEffectOfSubsidyOnNetPeriodicPostretirementBenefitCostReductionInServiceCost
9000000 USD
CY2011Q4 exc Prescription Drug Benefit Effect Of Subsidy On Net Periodic Postretirement Benefit Cost Reduction In Interest Cost On Accumulated Postretirement Benefit Obligation
PrescriptionDrugBenefitEffectOfSubsidyOnNetPeriodicPostretirementBenefitCostReductionInInterestCostOnAccumulatedPostretirementBenefitObligation
16000000 USD
CY2010Q4 exc Prescription Drug Benefit Effect Of Subsidy On Net Periodic Postretirement Benefit Cost Reduction In Interest Cost On Accumulated Postretirement Benefit Obligation
PrescriptionDrugBenefitEffectOfSubsidyOnNetPeriodicPostretirementBenefitCostReductionInInterestCostOnAccumulatedPostretirementBenefitObligation
19000000 USD
CY2009Q4 exc Prescription Drug Benefit Effect Of Subsidy On Net Periodic Postretirement Benefit Cost Reduction In Interest Cost On Accumulated Postretirement Benefit Obligation
PrescriptionDrugBenefitEffectOfSubsidyOnNetPeriodicPostretirementBenefitCostReductionInInterestCostOnAccumulatedPostretirementBenefitObligation
18000000 USD
CY2011Q4 us-gaap Prescription Drug Benefit Effect Of Subsidy On Net Periodic Postretirement Benefit Cost
PrescriptionDrugBenefitEffectOfSubsidyOnNetPeriodicPostretirementBenefitCost
28000000 USD
CY2010Q4 us-gaap Prescription Drug Benefit Effect Of Subsidy On Net Periodic Postretirement Benefit Cost
PrescriptionDrugBenefitEffectOfSubsidyOnNetPeriodicPostretirementBenefitCost
38000000 USD
CY2009Q4 us-gaap Prescription Drug Benefit Effect Of Subsidy On Net Periodic Postretirement Benefit Cost
PrescriptionDrugBenefitEffectOfSubsidyOnNetPeriodicPostretirementBenefitCost
38000000 USD
CY2010Q4 us-gaap Securities Loaned
SecuritiesLoaned
46000000 USD
CY2010Q4 exc Collateral For Borrowed Securities Fair Value
CollateralForBorrowedSecuritiesFairValue
47000000 USD
CY2011 us-gaap Defined Benefit Plan Effect Of One Percentage Point Increase On Service And Interest Cost Components
DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnServiceAndInterestCostComponents
75000000 USD
CY2011 us-gaap Defined Benefit Plan Effect Of One Percentage Point Increase On Accumulated Postretirement Benefit Obligation
DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnAccumulatedPostretirementBenefitObligation
686000000 USD
CY2011 us-gaap Defined Benefit Plan Effect Of One Percentage Point Decrease On Service And Interest Cost Components
DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnServiceAndInterestCostComponents
-57000000 USD
CY2011 us-gaap Defined Benefit Plan Effect Of One Percentage Point Decrease On Accumulated Postretirement Benefit Obligation
DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnAccumulatedPostretirementBenefitObligation
-521000000 USD
CY2011 exc Deferred Federal Income Tax Expense Federally Subsidized Healthcare Costs
DeferredFederalIncomeTaxExpenseFederallySubsidizedHealthcareCosts
65000000 USD
CY2011Q4 exc Excise Tax On High Cost Benefit Plans
ExciseTaxOnHighCostBenefitPlans
0.4 pure
CY2011Q4 exc Excise Tax On High Cost Benefit Plans Impact On Postretirement Benefit Obligation
ExciseTaxOnHighCostBenefitPlansImpactOnPostretirementBenefitObligation
0 USD
CY2011Q4 exc Qualified Defined Benefit Plan Estimated Future Employer Contributions In Next Fiscal Year
QualifiedDefinedBenefitPlanEstimatedFutureEmployerContributionsInNextFiscalYear
96000000 USD
CY2011Q4 exc Non Qualified Defined Benefit Plan Estimated Future Employer Contributions In Next Fiscal Year
NonQualifiedDefinedBenefitPlanEstimatedFutureEmployerContributionsInNextFiscalYear
42000000 USD
CY2011Q4 exc Defined Other Postretirement Benefit Plan Estimated Future Employer Contributions In Next Fiscal Year
DefinedOtherPostretirementBenefitPlanEstimatedFutureEmployerContributionsInNextFiscalYear
302000000 USD
CY2011Q4 us-gaap Securities Loaned
SecuritiesLoaned
17000000 USD
CY2011Q4 exc Collateral For Borrowed Securities Fair Value
CollateralForBorrowedSecuritiesFairValue
17000000 USD
CY2011Q4 exc Fair Value Assets Measured On Recurring Basis Pension Plan And Postretirement Benefit Plan Total
FairValueAssetsMeasuredOnRecurringBasisPensionPlanAndPostretirementBenefitPlanTotal
12986000000 USD
CY2010Q4 exc Fair Value Assets Measured On Recurring Basis Pension Plan And Postretirement Benefit Plan Total
FairValueAssetsMeasuredOnRecurringBasisPensionPlanAndPostretirementBenefitPlanTotal
10468000000 USD
CY2010Q4 exc Interest And Dividend Receivables Excluded From Pension And Opeb
InterestAndDividendReceivablesExcludedFromPensionAndOpeb
21000000 USD
CY2010Q4 exc Pending Asset Sales Transactions Excluded From Pension And Opeb
PendingAssetSalesTransactionsExcludedFromPensionAndOpeb
25000000 USD
CY2010Q4 us-gaap Securities Received As Collateral
SecuritiesReceivedAsCollateral
47000000 USD
CY2010Q4 us-gaap Obligation To Return Securities Received As Collateral
ObligationToReturnSecuritiesReceivedAsCollateral
47000000 USD
CY2011Q4 exc Interest And Dividend Receivables Excluded From Pension And Opeb
InterestAndDividendReceivablesExcludedFromPensionAndOpeb
55000000 USD
CY2011 exc Defined Contribution Plan Contributions By Employer
DefinedContributionPlanContributionsByEmployer
78000000 USD
CY2010 exc Defined Contribution Plan Contributions By Employer
DefinedContributionPlanContributionsByEmployer
81000000 USD
CY2009 exc Defined Contribution Plan Contributions By Employer
DefinedContributionPlanContributionsByEmployer
70000000 USD
exc Corporate Restructuring Positions Eliminated
CorporateRestructuringPositionsEliminated
500 EmployeePositions
exc Original Severance Estimate
OriginalSeveranceEstimate
40000000 USD
CY2009 exc Severance Estimate Adjustment
SeveranceEstimateAdjustment
-6000000 USD
CY2009 us-gaap Other Restructuring Costs
OtherRestructuringCosts
4000000 USD
CY2010 us-gaap Payments For Postemployment Benefits
PaymentsForPostemploymentBenefits
-18000000 USD
CY2011 us-gaap Payments For Postemployment Benefits
PaymentsForPostemploymentBenefits
-1000000 USD
CY2011Q4 exc Severance Benefits Obligations Balance
SeveranceBenefitsObligationsBalance
0 USD
CY2009Q4 exc Plant Retirement Obligations Balance
PlantRetirementObligationsBalance
19000000 USD
CY2010Q4 exc Plant Retirement Obligations Balance
PlantRetirementObligationsBalance
1000000 USD
CY2011Q4 us-gaap Preferred Stock Shares Outstanding
PreferredStockSharesOutstanding
874720 shares
CY2010Q4 us-gaap Preferred Stock Shares Outstanding
PreferredStockSharesOutstanding
874720 shares
CY2010Q4 us-gaap Preferred Stock Value Outstanding
PreferredStockValueOutstanding
87000000 USD
CY2011Q4 us-gaap Preferred Stock Value Outstanding
PreferredStockValueOutstanding
87000000 USD
CY2008Q3 exc Approved Common Stock Shares For Repurchased Under Third Quarter Two Thousand Eight Repurchase Plan
ApprovedCommonStockSharesForRepurchasedUnderThirdQuarterTwoThousandEightRepurchasePlan
1500000000 USD
CY2011Q4 exc Share Based Compensation Shares Authorized Under Ltip Plans
ShareBasedCompensationSharesAuthorizedUnderLtipPlans
24000000 shares
CY2011Q4 exc Share Based Compensation Components Performance Shares
ShareBasedCompensationComponentsPerformanceShares
26000000 USD
CY2011Q4 exc Share Based Compensation Components Stock Options
ShareBasedCompensationComponentsStockOptions
8000000 USD
CY2011Q4 exc Share Based Compensation Components Restricted Stock
ShareBasedCompensationComponentsRestrictedStock
31000000 USD
CY2011Q4 exc Share Based Compensation Components Other Stock Based Awards
ShareBasedCompensationComponentsOtherStockBasedAwards
4000000 USD
CY2011Q4 exc Share Based Compensation Components Total In Operating And Maintenance Pre Tax
ShareBasedCompensationComponentsTotalInOperatingAndMaintenancePreTax
69000000 USD
CY2011Q4 exc Share Based Compensation Income Tax Benefit
ShareBasedCompensationIncomeTaxBenefit
27000000 USD
CY2011Q4 exc Share Based Compensation Components Total In Expense After Tax
ShareBasedCompensationComponentsTotalInExpenseAfterTax
42000000 USD
CY2010Q4 exc Share Based Compensation Components Performance Shares
ShareBasedCompensationComponentsPerformanceShares
6000000 USD
CY2010Q4 exc Share Based Compensation Components Stock Options
ShareBasedCompensationComponentsStockOptions
10000000 USD
CY2010Q4 exc Share Based Compensation Components Restricted Stock
ShareBasedCompensationComponentsRestrictedStock
21000000 USD
CY2010Q4 exc Share Based Compensation Components Other Stock Based Awards
ShareBasedCompensationComponentsOtherStockBasedAwards
4000000 USD
CY2010Q4 exc Share Based Compensation Components Total In Operating And Maintenance Pre Tax
ShareBasedCompensationComponentsTotalInOperatingAndMaintenancePreTax
41000000 USD
CY2010Q4 exc Share Based Compensation Income Tax Benefit
ShareBasedCompensationIncomeTaxBenefit
16000000 USD
CY2010Q4 exc Share Based Compensation Components Total In Expense After Tax
ShareBasedCompensationComponentsTotalInExpenseAfterTax
25000000 USD
CY2009Q4 exc Share Based Compensation Components Performance Shares
ShareBasedCompensationComponentsPerformanceShares
31000000 USD
CY2009Q4 exc Share Based Compensation Components Stock Options
ShareBasedCompensationComponentsStockOptions
20000000 USD
CY2009Q4 exc Share Based Compensation Components Restricted Stock
ShareBasedCompensationComponentsRestrictedStock
26000000 USD
CY2009Q4 exc Share Based Compensation Components Other Stock Based Awards
ShareBasedCompensationComponentsOtherStockBasedAwards
4000000 USD
CY2009Q4 exc Share Based Compensation Components Total In Operating And Maintenance Pre Tax
ShareBasedCompensationComponentsTotalInOperatingAndMaintenancePreTax
81000000 USD
CY2009Q4 exc Share Based Compensation Income Tax Benefit
ShareBasedCompensationIncomeTaxBenefit
32000000 USD
CY2009Q4 exc Share Based Compensation Components Total In Expense After Tax
ShareBasedCompensationComponentsTotalInExpenseAfterTax
49000000 USD
CY2009Q4 exc Excess Tax Benefits Included In Other Financing Activities In Cash Flows Performance Share Awards
ExcessTaxBenefitsIncludedInOtherFinancingActivitiesInCashFlowsPerformanceShareAwards
0 USD
CY2009Q4 exc Excess Tax Benefits Included In Other Financing Activities In Cash Flows Stock Deferral Plan
ExcessTaxBenefitsIncludedInOtherFinancingActivitiesInCashFlowsStockDeferralPlan
0 USD
CY2011 exc Weighted Average Assumptions Stock Options Expected Life In Years
WeightedAverageAssumptionsStockOptionsExpectedLifeInYears
6.25 Years
CY2011 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate
ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
0.000484 pure
CY2010 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate
ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
0.000456 pure
CY2009 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate
ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
0.000372 pure
CY2011 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Weighted Average Volatility Rate
ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageVolatilityRate
0.00244 pure
CY2010 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Weighted Average Volatility Rate
ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageVolatilityRate
0.00271 pure
CY2009 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Weighted Average Volatility Rate
ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageVolatilityRate
0.00367 pure
CY2011Q4 exc Share Based Compensation Components Total In Expense Pre Tax
ShareBasedCompensationComponentsTotalInExpensePreTax
69000000 USD
CY2010Q4 exc Share Based Compensation Components Total In Expense Pre Tax
ShareBasedCompensationComponentsTotalInExpensePreTax
41000000 USD
CY2009Q4 exc Share Based Compensation Components Total In Expense Pre Tax
ShareBasedCompensationComponentsTotalInExpensePreTax
81000000 USD
CY2011 us-gaap Tax Benefit From Stock Options Exercised
TaxBenefitFromStockOptionsExercised
2000000 USD
CY2011Q4 exc Tax Benefit From Restricted Stock Units Distributed
TaxBenefitFromRestrictedStockUnitsDistributed
8000000 USD
CY2011Q4 exc Tax Benefit From Performance Share Awards Distributed
TaxBenefitFromPerformanceShareAwardsDistributed
7000000 USD
CY2011Q4 exc Tax Benefit From Stock Deferral Plan
TaxBenefitFromStockDeferralPlan
1000000 USD
CY2011Q4 exc Excess Tax Benefits Included In Other Financing Activities In Cash Flows Stock Options
ExcessTaxBenefitsIncludedInOtherFinancingActivitiesInCashFlowsStockOptions
1000000 USD
CY2011Q4 exc Excess Tax Benefits Included In Other Financing Activities In Cash Flows Restricted Stock Units
ExcessTaxBenefitsIncludedInOtherFinancingActivitiesInCashFlowsRestrictedStockUnits
0 USD
CY2011Q4 exc Excess Tax Benefits Included In Other Financing Activities In Cash Flows Performance Share Awards
ExcessTaxBenefitsIncludedInOtherFinancingActivitiesInCashFlowsPerformanceShareAwards
0 USD
CY2011Q4 exc Excess Tax Benefits Included In Other Financing Activities In Cash Flows Stock Deferral Plan
ExcessTaxBenefitsIncludedInOtherFinancingActivitiesInCashFlowsStockDeferralPlan
0 USD
CY2010 us-gaap Tax Benefit From Stock Options Exercised
TaxBenefitFromStockOptionsExercised
5000000 USD
CY2010Q4 exc Tax Benefit From Restricted Stock Units Distributed
TaxBenefitFromRestrictedStockUnitsDistributed
9000000 USD
CY2010Q4 exc Tax Benefit From Performance Share Awards Distributed
TaxBenefitFromPerformanceShareAwardsDistributed
13000000 USD
CY2010Q4 exc Tax Benefit From Stock Deferral Plan
TaxBenefitFromStockDeferralPlan
1000000 USD
CY2010Q4 exc Excess Tax Benefits Included In Other Financing Activities In Cash Flows Stock Options
ExcessTaxBenefitsIncludedInOtherFinancingActivitiesInCashFlowsStockOptions
3000000 USD
CY2010Q4 exc Excess Tax Benefits Included In Other Financing Activities In Cash Flows Restricted Stock Units
ExcessTaxBenefitsIncludedInOtherFinancingActivitiesInCashFlowsRestrictedStockUnits
0 USD
CY2010Q4 exc Excess Tax Benefits Included In Other Financing Activities In Cash Flows Performance Share Awards
ExcessTaxBenefitsIncludedInOtherFinancingActivitiesInCashFlowsPerformanceShareAwards
0 USD
CY2010Q4 exc Excess Tax Benefits Included In Other Financing Activities In Cash Flows Stock Deferral Plan
ExcessTaxBenefitsIncludedInOtherFinancingActivitiesInCashFlowsStockDeferralPlan
0 USD
CY2009 us-gaap Tax Benefit From Stock Options Exercised
TaxBenefitFromStockOptionsExercised
6000000 USD
CY2009Q4 exc Tax Benefit From Restricted Stock Units Distributed
TaxBenefitFromRestrictedStockUnitsDistributed
7000000 USD
CY2009Q4 exc Tax Benefit From Performance Share Awards Distributed
TaxBenefitFromPerformanceShareAwardsDistributed
19000000 USD
CY2009Q4 exc Tax Benefit From Stock Deferral Plan
TaxBenefitFromStockDeferralPlan
1000000 USD
CY2009Q4 exc Excess Tax Benefits Included In Other Financing Activities In Cash Flows Stock Options
ExcessTaxBenefitsIncludedInOtherFinancingActivitiesInCashFlowsStockOptions
4000000 USD
CY2009Q4 exc Excess Tax Benefits Included In Other Financing Activities In Cash Flows Restricted Stock Units
ExcessTaxBenefitsIncludedInOtherFinancingActivitiesInCashFlowsRestrictedStockUnits
0 USD
CY2011 us-gaap Stock Issued During Period Shares Stock Options Exercised
StockIssuedDuringPeriodSharesStockOptionsExercised
-424228 shares
CY2011Q4 us-gaap Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1
SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1
30000000 USD
CY2011 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Remaining Contractual Term
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm
4.64 Years
CY2011 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
5000000 USD
CY2011 us-gaap Proceeds From Stock Options Exercised
ProceedsFromStockOptionsExercised
13000000 USD
CY2010 us-gaap Proceeds From Stock Options Exercised
ProceedsFromStockOptionsExercised
24000000 USD
CY2009 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
15000000 USD
CY2009 us-gaap Proceeds From Stock Options Exercised
ProceedsFromStockOptionsExercised
20000000 USD
CY2010 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
13000000 USD
CY2011Q4 exc Weighted Average Period Non Vested Stock Options Are Expected To Be Recognized Over
WeightedAveragePeriodNonVestedStockOptionsAreExpectedToBeRecognizedOver
2.09 Years
CY2011Q4 exc Stock Options Issued To Retirement Eligible Employees That Vested Immediately On Date Of Grant
StockOptionsIssuedToRetirementEligibleEmployeesThatVestedImmediatelyOnDateOfGrant
620800 shares
CY2010 us-gaap Real Estate Tax Expense
RealEstateTaxExpense
175000000 USD
CY2010 us-gaap Other Labor Related Expenses
OtherLaborRelatedExpenses
121000000 USD
CY2010 us-gaap Taxes Other
TaxesOther
36000000 USD
CY2009 exc Utility Taxes
UtilityTaxes
481000000 USD
CY2011Q4 exc Classification Of Obligations Related To Outstanding Performance Share Awards Not Yet Settled Current Liabilities
ClassificationOfObligationsRelatedToOutstandingPerformanceShareAwardsNotYetSettledCurrentLiabilities
3000000 USD
CY2010Q4 exc Restricted Stock Units Weighted Average Grand Date Fair Value
RestrictedStockUnitsWeightedAverageGrandDateFairValue
44.23 USD
CY2009Q4 exc Restricted Stock Units Weighted Average Grand Date Fair Value
RestrictedStockUnitsWeightedAverageGrandDateFairValue
56.08 USD
CY2010Q4 exc Restricted Stock Units Obligations Not Yet Settled
RestrictedStockUnitsObligationsNotYetSettled
38000000 USD
CY2011Q4 exc Restricted Stock Units Obligations To Be Settled In Cash
RestrictedStockUnitsObligationsToBeSettledInCash
1000000 USD
CY2010Q4 exc Restricted Stock Units Obligations To Be Settled In Cash
RestrictedStockUnitsObligationsToBeSettledInCash
1000000 USD
CY2010Q4 exc Fair Value Of Settled Restricted Stock Units
FairValueOfSettledRestrictedStockUnits
22000000 USD
CY2009Q4 exc Fair Value Of Settled Restricted Stock Units
FairValueOfSettledRestrictedStockUnits
17000000 USD
CY2011Q4 exc Restricted Stock Units Weighted Average Grand Date Fair Value
RestrictedStockUnitsWeightedAverageGrandDateFairValue
43.33 USD
CY2011Q4 exc Restricted Stock Units Obligations Not Yet Settled
RestrictedStockUnitsObligationsNotYetSettled
46000000 USD
CY2011Q4 exc Fair Value Of Settled Restricted Stock Units
FairValueOfSettledRestrictedStockUnits
19000000 USD
CY2011Q4 exc Unrecognized Compensation Costs Related To Nonvested Restricted Stock Units
UnrecognizedCompensationCostsRelatedToNonvestedRestrictedStockUnits
26000000 USD
CY2011Q4 exc Weighted Average Period Non Vested Restricted Stock Units Are Expected To Be Recognized Over
WeightedAveragePeriodNonVestedRestrictedStockUnitsAreExpectedToBeRecognizedOver
2.12 Years
CY2010Q4 exc Performance Share Awards Weighted Average Grand Date Fair Value
PerformanceShareAwardsWeightedAverageGrandDateFairValue
60.82 USD
CY2009Q4 exc Performance Share Awards Weighted Average Grand Date Fair Value
PerformanceShareAwardsWeightedAverageGrandDateFairValue
57.34 USD
CY2009Q4 exc Fair Value Of Settled Performance Share Awards
FairValueOfSettledPerformanceShareAwards
47000000 USD
CY2010Q4 exc Fair Value Of Settled Performance Share Awards
FairValueOfSettledPerformanceShareAwards
32000000 USD
CY2010Q4 exc Performance Share Awards Obligations To Be Settled In Cash
PerformanceShareAwardsObligationsToBeSettledInCash
20000000 USD
CY2009Q4 exc Performance Share Awards Obligations To Be Settled In Cash
PerformanceShareAwardsObligationsToBeSettledInCash
30000000 USD
CY2011Q4 exc Fair Value Of Settled Performance Share Awards
FairValueOfSettledPerformanceShareAwards
22000000 USD
CY2011Q4 exc Performance Share Awards Obligations To Be Settled In Cash
PerformanceShareAwardsObligationsToBeSettledInCash
10000000 USD
CY2011Q4 exc Fully Vested Stock Options Issued To Retirement Eligible Employees
FullyVestedStockOptionsIssuedToRetirementEligibleEmployees
455418 shares
CY2011Q4 exc Performance Share Awards Weighted Average Grand Date Fair Value
PerformanceShareAwardsWeightedAverageGrandDateFairValue
43.52 USD
CY2011Q4 exc Unrecognized Compensation Costs Related To Nonvested Performance Share Awards
UnrecognizedCompensationCostsRelatedToNonvestedPerformanceShareAwards
5000000 USD
CY2011Q4 exc Weighted Average Period Non Vested Performance Share Awards Are Expected To Be Recognized Over
WeightedAveragePeriodNonVestedPerformanceShareAwardsAreExpectedToBeRecognizedOver
2 Years
CY2011Q4 exc Open Asbestos Related Personal Injury Claims
OpenAsbestosRelatedPersonalInjuryClaims
180 OpenClaims
CY2011Q4 exc Asbestos Loss Contingency Accrual At Carrying Value Related To Anticipated Claims
AsbestosLossContingencyAccrualAtCarryingValueRelatedToAnticipatedClaims
35000000 USD
CY2011 us-gaap Site Contingency Loss Exposure Not Accrued Low Estimate
SiteContingencyLossExposureNotAccruedLowEstimate
430000000 USD
CY2011 exc Business Acquisition Cost Of Acquired Entity Transaction Costs Direct Merger Investment To State
BusinessAcquisitionCostOfAcquiredEntityTransactionCostsDirectMergerInvestmentToState
1000000000 USD
CY2009 us-gaap Real Estate Tax Expense
RealEstateTaxExpense
157000000 USD
CY2009 us-gaap Other Labor Related Expenses
OtherLaborRelatedExpenses
114000000 USD
CY2011Q4 exc Classification Of Obligations Related To Outstanding Performance Share Awards Not Yet Settled Deferred Credits And Other Liabilities
ClassificationOfObligationsRelatedToOutstandingPerformanceShareAwardsNotYetSettledDeferredCreditsAndOtherLiabilities
0 USD
CY2011Q4 exc Classification Of Obligations Related To Outstanding Performance Share Awards Not Yet Settled Common Stock
ClassificationOfObligationsRelatedToOutstandingPerformanceShareAwardsNotYetSettledCommonStock
30000000 USD
CY2011Q4 exc Total Balance Sheet Classification Of Obligations Related To Outstanding Performance Share Awards Not Yet Settled
TotalBalanceSheetClassificationOfObligationsRelatedToOutstandingPerformanceShareAwardsNotYetSettled
33000000 USD
CY2010Q4 exc Classification Of Obligations Related To Outstanding Performance Share Awards Not Yet Settled Current Liabilities
ClassificationOfObligationsRelatedToOutstandingPerformanceShareAwardsNotYetSettledCurrentLiabilities
9000000 USD
CY2010Q4 exc Classification Of Obligations Related To Outstanding Performance Share Awards Not Yet Settled Deferred Credits And Other Liabilities
ClassificationOfObligationsRelatedToOutstandingPerformanceShareAwardsNotYetSettledDeferredCreditsAndOtherLiabilities
4000000 USD
CY2010Q4 exc Classification Of Obligations Related To Outstanding Performance Share Awards Not Yet Settled Common Stock
ClassificationOfObligationsRelatedToOutstandingPerformanceShareAwardsNotYetSettledCommonStock
16000000 USD
CY2010Q4 exc Total Balance Sheet Classification Of Obligations Related To Outstanding Performance Share Awards Not Yet Settled
TotalBalanceSheetClassificationOfObligationsRelatedToOutstandingPerformanceShareAwardsNotYetSettled
29000000 USD
CY2011 us-gaap Income Loss From Continuing Operations
IncomeLossFromContinuingOperations
0 USD
CY2011 us-gaap Income Loss From Discontinued Operations Net Of Tax
IncomeLossFromDiscontinuedOperationsNetOfTax
0 USD
CY2010 us-gaap Income Loss From Discontinued Operations Net Of Tax
IncomeLossFromDiscontinuedOperationsNetOfTax
0 USD
CY2009 us-gaap Income Loss From Continuing Operations
IncomeLossFromContinuingOperations
0 USD
CY2009 us-gaap Income Loss From Discontinued Operations Net Of Tax
IncomeLossFromDiscontinuedOperationsNetOfTax
0 USD
CY2011 us-gaap Incremental Common Shares Attributable To Share Based Payment Arrangements
IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
2000000 shares
CY2010 us-gaap Incremental Common Shares Attributable To Share Based Payment Arrangements
IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
2000000 shares
CY2009 us-gaap Incremental Common Shares Attributable To Share Based Payment Arrangements
IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
3000000 shares
CY2010 us-gaap Income Loss From Continuing Operations
IncomeLossFromContinuingOperations
0 USD
CY2011 us-gaap Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount
AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
9000000 shares
CY2010 us-gaap Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount
AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
8000000 shares
CY2009 us-gaap Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount
AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
5000000 shares
CY2011Q4 us-gaap Capital Leases Net Investment In Direct Financing Leases
CapitalLeasesNetInvestmentInDirectFinancingLeases
656000000 USD
CY2011Q4 exc Minimum Ghg Emissions Required For Eligibility For Stationary Source Permitting
MinimumGhgEmissionsRequiredForEligibilityForStationarySourcePermitting
75000 Tons
CY2011Q4 exc Minimum Additional Ghg Emissions Required For Eligibility For Stationary Source Permitting After Modifications
MinimumAdditionalGhgEmissionsRequiredForEligibilityForStationarySourcePermittingAfterModifications
100000 Tons
CY2011Q4 exc Asbestos Loss Contingency Accrual At Carrying Value Related To Open Claims
AsbestosLossContingencyAccrualAtCarryingValueRelatedToOpenClaims
14000000 USD
CY2011Q4 exc Surety Bond Commitments
SuretyBondCommitments
74000000 USD
CY2011Q4 exc Performance Guarantee Commitments
PerformanceGuaranteeCommitments
533000000 USD
CY2011Q4 exc Energy Marketing Contract Guarantee Commitments
EnergyMarketingContractGuaranteeCommitments
280000000 USD
CY2011Q4 exc Nuclear Insurance Total Retrospective Premium Obligation
NuclearInsuranceTotalRetrospectivePremiumObligation
2217000000 USD
CY2011Q4 exc Lease Guarantee Commitments
LeaseGuaranteeCommitments
55000000 USD
CY2011Q4 exc Future Third Party Payments Made Chicago Settlement Agreement
FutureThirdPartyPaymentsMadeChicagoSettlementAgreement
2000000 USD
CY2011Q4 exc Third Party Capacity Reservation Agreement Guarantee Commitment
ThirdPartyCapacityReservationAgreementGuaranteeCommitment
2000000 USD
CY2011Q4 exc Commercial Commitments
CommercialCommitments
4115000000 USD
CY2011Q4 us-gaap Letters Of Credit Outstanding Amount
LettersOfCreditOutstandingAmount
952000000 USD
CY2011Q4 us-gaap Operating Leases Future Minimum Payments Due Current
OperatingLeasesFutureMinimumPaymentsDueCurrent
65000000 USD
CY2011Q4 us-gaap Operating Leases Future Minimum Payments Due In Two Years
OperatingLeasesFutureMinimumPaymentsDueInTwoYears
59000000 USD
CY2011Q4 us-gaap Operating Leases Future Minimum Payments Due In Three Years
OperatingLeasesFutureMinimumPaymentsDueInThreeYears
56000000 USD
CY2011Q4 us-gaap Operating Leases Future Minimum Payments Due In Four Years
OperatingLeasesFutureMinimumPaymentsDueInFourYears
45000000 USD
CY2011Q4 us-gaap Operating Leases Future Minimum Payments Due In Five Years
OperatingLeasesFutureMinimumPaymentsDueInFiveYears
47000000 USD
CY2011Q4 exc Operating Leases Future Minimum Payments Due Beyond Five Years
OperatingLeasesFutureMinimumPaymentsDueBeyondFiveYears
387000000 USD
CY2011Q4 us-gaap Operating Leases Future Minimum Payments Due
OperatingLeasesFutureMinimumPaymentsDue
659000000 USD
CY2011 us-gaap Other Labor Related Expenses
OtherLaborRelatedExpenses
123000000 USD
CY2011 us-gaap Taxes Other
TaxesOther
42000000 USD
CY2010 exc Utility Taxes
UtilityTaxes
476000000 USD
CY2011 us-gaap Lease And Rental Expense
LeaseAndRentalExpense
711000000 USD
CY2010 us-gaap Lease And Rental Expense
LeaseAndRentalExpense
722000000 USD
CY2009 us-gaap Lease And Rental Expense
LeaseAndRentalExpense
691000000 USD
CY2011Q4 exc Civil Liability Obiligation
CivilLiabilityObiligation
500000 USD
CY2011Q4 exc Civil Legal Liability Total Obiligation
CivilLegalLiabilityTotalObiligation
100000 USD
CY2011 exc Schedule Of Operating Revenues
ScheduleOfOperatingRevenues
<div><table style="border-collapse:collapse;margin-top:20px;"><tr style="height: 12px"><td colspan="3" style="width: 323px; text-align:left;border-color:#000000;min-width:323px;"><font style="FONT-WEIGHT: bold;TEXT-DECORATION: underline;FONT-FAMILY: Arial;FONT-SIZE: 7.5pt;COLOR: #000000;">For the Year Ended December 31, 2011</font></td><td colspan="2" style="width: 64px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:64px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7.5pt;COLOR: #000000;TEXT-ALIGN: center;">Exelon</font></td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td colspan="2" style="width: 65px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:65px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7.5pt;COLOR: #000000;TEXT-ALIGN: center;">Generation</font></td><td style="width: 27px; text-align:center;border-color:#000000;min-width:27px;">&#160;</td><td colspan="2" style="width: 63px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:63px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7.5pt;COLOR: #000000;TEXT-ALIGN: center;">ComEd</font></td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td colspan="2" style="width: 63px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:63px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 7.5pt;COLOR: #000000;TEXT-ALIGN: center;">PECO</font></td></tr><tr style="height: 19px"><td colspan="3" style="width: 323px; text-align:left;border-color:#000000;min-width:323px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 10pt;COLOR: #000000;">Operating revenues</font><font style="FONT-WEIGHT: bold;FONT-FAMILY: Arial;FONT-SIZE: 10pt;COLOR: #000000;"> (a)</font></td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 54px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:54px;">&#160;</td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 55px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:55px;">&#160;</td><td style="width: 27px; text-align:left;border-color:#000000;min-width:27px;">&#160;</td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 53px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:53px;">&#160;</td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 53px; border-top-style:solid;border-top-width:1px;text-align:left;border-color:#000000;min-width:53px;">&#160;</td></tr><tr style="height: 17px"><td colspan="3" style="width: 323px; text-align:left;border-color:#000000;min-width:323px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 10pt;COLOR: #000000;">Wholesale</font></td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 10pt;COLOR: #000000;TEXT-ALIGN: center;">$</font></td><td style="width: 54px; text-align:right;border-color:#000000;min-width:54px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 10pt;COLOR: #000000;">7,717</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 10pt;COLOR: #000000;TEXT-ALIGN: center;">$</font></td><td style="width: 55px; text-align:right;border-color:#000000;min-width:55px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 10pt;COLOR: #000000;">8,837</font></td><td style="width: 27px; text-align:left;border-color:#000000;min-width:27px;">&#160;</td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 10pt;COLOR: #000000;TEXT-ALIGN: center;">$</font></td><td style="width: 53px; text-align:right;border-color:#000000;min-width:53px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 10pt;COLOR: #000000;">0</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 10pt;COLOR: #000000;TEXT-ALIGN: center;">$</font></td><td style="width: 53px; text-align:right;border-color:#000000;min-width:53px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 10pt;COLOR: #000000;">32</font></td></tr><tr style="height: 17px"><td colspan="3" style="width: 323px; text-align:left;border-color:#000000;min-width:323px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 10pt;COLOR: #000000;">Retail electric and gas</font></td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 54px; text-align:right;border-color:#000000;min-width:54px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 10pt;COLOR: #000000;">10,323</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 55px; text-align:right;border-color:#000000;min-width:55px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 10pt;COLOR: #000000;">1,407</font></td><td style="width: 27px; text-align:left;border-color:#000000;min-width:27px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 7.5pt;COLOR: #000000;">(b)</font></td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 53px; text-align:right;border-color:#000000;min-width:53px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 10pt;COLOR: #000000;">5,460</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 53px; text-align:right;border-color:#000000;min-width:53px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 10pt;COLOR: #000000;">3,463</font></td></tr><tr style="height: 17px"><td colspan="3" style="width: 323px; text-align:left;border-color:#000000;min-width:323px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 10pt;COLOR: #000000;">Other</font></td><td style="width: 10px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 54px; border-bottom-style:solid;border-bottom-width:1px;text-align:right;border-color:#000000;min-width:54px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 10pt;COLOR: #000000;">884</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 55px; border-bottom-style:solid;border-bottom-width:1px;text-align:right;border-color:#000000;min-width:55px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 10pt;COLOR: #000000;">64</font></td><td style="width: 27px; text-align:left;border-color:#000000;min-width:27px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 7.5pt;COLOR: #000000;">(c)</font></td><td style="width: 10px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 53px; border-bottom-style:solid;border-bottom-width:1px;text-align:right;border-color:#000000;min-width:53px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 10pt;COLOR: #000000;">596</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 53px; border-bottom-style:solid;border-bottom-width:1px;text-align:right;border-color:#000000;min-width:53px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 10pt;COLOR: #000000;">225</font></td></tr><tr style="height: 7px"><td style="width: 25px; text-align:left;border-color:#000000;min-width:25px;">&#160;</td><td style="width: 25px; text-align:left;border-color:#000000;min-width:25px;">&#160;</td><td style="width: 273px; text-align:left;border-color:#000000;min-width:273px;">&#160;</td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 54px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:54px;">&#160;</td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 55px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:55px;">&#160;</td><td style="width: 27px; text-align:center;border-color:#000000;min-width:27px;">&#160;</td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 53px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:53px;">&#160;</td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 53px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:53px;">&#160;</td></tr><tr style="height: 17px"><td colspan="3" style="width: 323px; text-align:left;border-color:#000000;min-width:323px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 10pt;COLOR: #000000;">Total operating revenues</font></td><td style="width: 10px; border-bottom-style:double;border-bottom-width:3px;text-align:center;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 10pt;COLOR: #000000;TEXT-ALIGN: center;">$</font></td><td style="width: 54px; border-bottom-style:double;border-bottom-width:3px;text-align:right;border-color:#000000;min-width:54px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 10pt;COLOR: #000000;">18,924</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; border-bottom-style:double;border-bottom-width:3px;text-align:center;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 10pt;COLOR: #000000;TEXT-ALIGN: center;">$</font></td><td style="width: 55px; border-bottom-style:double;border-bottom-width:3px;text-align:right;border-color:#000000;min-width:55px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 10pt;COLOR: #000000;">10,308</font></td><td style="width: 27px; text-align:left;border-color:#000000;min-width:27px;">&#160;</td><td style="width: 10px; border-bottom-style:double;border-bottom-width:3px;text-align:center;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 10pt;COLOR: #000000;TEXT-ALIGN: center;">$</font></td><td style="width: 53px; border-bottom-style:double;border-bottom-width:3px;text-align:right;border-color:#000000;min-width:53px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 10pt;COLOR: #000000;">6,056</font></td><td style="width: 10px; 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border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:54px;">&#160;</td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 55px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:55px;">&#160;</td><td style="width: 27px; text-align:center;border-color:#000000;min-width:27px;">&#160;</td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 53px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:53px;">&#160;</td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 53px; 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border-bottom-style:double;border-bottom-width:3px;text-align:right;border-color:#000000;min-width:55px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 10pt;COLOR: #000000;"> 9,703</font></td><td style="width: 27px; text-align:left;border-color:#000000;min-width:27px;">&#160;</td><td style="width: 10px; border-bottom-style:double;border-bottom-width:3px;text-align:center;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 10pt;COLOR: #000000;TEXT-ALIGN: center;">$</font></td><td style="width: 53px; border-bottom-style:double;border-bottom-width:3px;text-align:right;border-color:#000000;min-width:53px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 10pt;COLOR: #000000;"> 5,774</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td style="width: 10px; border-bottom-style:double;border-bottom-width:3px;text-align:center;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 10pt;COLOR: #000000;TEXT-ALIGN: center;">$</font></td><td style="width: 53px; border-bottom-style:double;border-bottom-width:3px;text-align:right;border-color:#000000;min-width:53px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 10pt;COLOR: #000000;"> 5,311</font></td></tr></table></div><p style='margin-top: 0pt; margin-bottom: 0pt;'></p><p style='margin-top:12pt; margin-bottom:3pt'><font style="font-family:Times New Roman;font-size:6pt;margin-left:0px;">&#160;</font></p><p style='margin-top:0pt; margin-bottom:0pt'><font style="font-family:Arial;font-size:7.5pt;margin-left:0px;">(a)&#160;&#160;&#160;&#160;&#160;&#160;&#160;</font><font style="font-family:Arial;font-size:7.5pt;">Includes operating revenues from affiliates. </font></p><p style='margin-top:0pt; margin-bottom:0pt'><font style="font-family:Arial;font-size:7.5pt;margin-left:0px;">(b)&#160;&#160;&#160;&#160;&#160;&#160;&#160;</font><font style="font-family:Arial;font-size:7.5pt;">Generatio</font><font style="font-family:Arial;font-size:7.5pt;">n</font><font style="font-family:Arial;font-size:7.5pt;">'</font><font style="font-family:Arial;font-size:7.5pt;">s </font><font style="font-family:Arial;font-size:7.5pt;">retail electric and gas operating revenues consist </font><font style="font-family:Arial;font-size:7.5pt;">primaril</font><font style="font-family:Arial;font-size:7.5pt;">y of Exelon Energy Company, LLC</font><font style="font-family:Arial;font-size:7.5pt;">. </font><font style="font-family:Arial;font-size:7.5pt;">Generation</font><font style="font-family:Arial;font-size:7.5pt;">'</font><font style="font-family:Arial;font-size:7.5pt;">s</font><font style="font-family:Arial;font-size:7.5pt;"> </font><font style="font-family:Arial;font-size:7.5pt;">retail electric operating revenues are allocated among its reportable segments</font><font style="font-family:Arial;font-size:7.5pt;">. </font></p><p style='margin-top:0pt; 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CY2011 exc Electric Gas Utility Revenue Wholesale
ElectricGasUtilityRevenueWholesale
7717000000 USD
CY2011 exc Electric Gas Utility Revenue Retail
ElectricGasUtilityRevenueRetail
10323000000 USD
CY2011 us-gaap Other Sales Revenue Net
OtherSalesRevenueNet
884000000 USD
CY2010 exc Electric Gas Utility Revenue Wholesale
ElectricGasUtilityRevenueWholesale
5934000000 USD
CY2010 exc Electric Gas Utility Revenue Retail
ElectricGasUtilityRevenueRetail
11906000000 USD
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OtherSalesRevenueNet
804000000 USD
CY2009 exc Electric Gas Utility Revenue Wholesale
ElectricGasUtilityRevenueWholesale
5469000000 USD
CY2009 exc Electric Gas Utility Revenue Retail
ElectricGasUtilityRevenueRetail
11099000000 USD
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OtherSalesRevenueNet
750000000 USD
CY2011 us-gaap Depreciation
Depreciation
1284000000 USD
CY2011 us-gaap Amortization Of Regulatory Asset
AmortizationOfRegulatoryAsset
51000000 USD
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NuclearFuelAmortization
755000000 USD
CY2011 us-gaap Asset Retirement Obligation Accretion Expense
AssetRetirementObligationAccretionExpense
214000000 USD
CY2010 us-gaap Depreciation
Depreciation
1144000000 USD
CY2010 us-gaap Amortization Of Regulatory Asset
AmortizationOfRegulatoryAsset
931000000 USD
CY2010 exc Nuclear Fuel Amortization
NuclearFuelAmortization
672000000 USD
CY2010 us-gaap Asset Retirement Obligation Accretion Expense
AssetRetirementObligationAccretionExpense
196000000 USD
CY2009 us-gaap Depreciation
Depreciation
996000000 USD
CY2009 us-gaap Amortization Of Regulatory Asset
AmortizationOfRegulatoryAsset
838000000 USD
CY2009 exc Nuclear Fuel Amortization
NuclearFuelAmortization
558000000 USD
CY2009 us-gaap Asset Retirement Obligation Accretion Expense
AssetRetirementObligationAccretionExpense
209000000 USD
CY2011 exc Utility Taxes
UtilityTaxes
443000000 USD
CY2011 us-gaap Real Estate Tax Expense
RealEstateTaxExpense
177000000 USD
CY2009 us-gaap Taxes Other
TaxesOther
26000000 USD
CY2011 exc Realized Gain Loss Investment Income Nuclear Decommissioning Trust Funds Regulatory Accounting
RealizedGainLossInvestmentIncomeNuclearDecommissioningTrustFundsRegulatoryAccounting
177000000 USD
CY2011 exc Realized Gain Loss Investment Income Nuclear Decommissioning Trust Funds Nonregulatory Accounting
RealizedGainLossInvestmentIncomeNuclearDecommissioningTrustFundsNonregulatoryAccounting
45000000 USD
CY2011 exc Unrealized Gain Loss Nuclear Decommissioning Trust Funds Regulatory Accounting
UnrealizedGainLossNuclearDecommissioningTrustFundsRegulatoryAccounting
-74000000 USD
CY2011 exc Unrealized Gain Loss Nuclear Decommissioning Trust Funds Nonregulatory Accounting
UnrealizedGainLossNuclearDecommissioningTrustFundsNonregulatoryAccounting
-4000000 USD
CY2011 exc Regulatory Offset Nuclear Decommissioning Trust Fund Activity
RegulatoryOffsetNuclearDecommissioningTrustFundActivity
130000000 USD
CY2011 exc Gain Loss Investment Income Nuclear Decommissioning Trust Funds
GainLossInvestmentIncomeNuclearDecommissioningTrustFunds
62000000 USD
CY2011 us-gaap Capital Leases Income Statement Direct Financing Lease Revenue
CapitalLeasesIncomeStatementDirectFinancingLeaseRevenue
28000000 USD
CY2011 exc Unrecognized Tax Benefits Interest Income
UnrecognizedTaxBenefitsInterestIncome
53000000 USD
CY2011 us-gaap Investment Income Interest
InvestmentIncomeInterest
10000000 USD
CY2011 us-gaap Other Nonoperating Income
OtherNonoperatingIncome
-7000000 USD
CY2011 us-gaap Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity
PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity
17000000 USD
CY2011 exc Net Unrealized Gain Loss On Pledged Assets
NetUnrealizedGainLossOnPledgedAssets
48000000 USD
CY2011Q4 exc Bargain Purchase Gain Wolf Hollow Acquisition
BargainPurchaseGainWolfHollowAcquisition
36000000 USD
CY2010 exc Realized Gain Loss Investment Income Nuclear Decommissioning Trust Funds Regulatory Accounting
RealizedGainLossInvestmentIncomeNuclearDecommissioningTrustFundsRegulatoryAccounting
176000000 USD
CY2010 exc Realized Gain Loss Investment Income Nuclear Decommissioning Trust Funds Nonregulatory Accounting
RealizedGainLossInvestmentIncomeNuclearDecommissioningTrustFundsNonregulatoryAccounting
51000000 USD
CY2010 exc Unrealized Gain Loss Nuclear Decommissioning Trust Funds Regulatory Accounting
UnrealizedGainLossNuclearDecommissioningTrustFundsRegulatoryAccounting
316000000 USD
CY2010 exc Unrealized Gain Loss Nuclear Decommissioning Trust Funds Nonregulatory Accounting
UnrealizedGainLossNuclearDecommissioningTrustFundsNonregulatoryAccounting
104000000 USD
CY2010 exc Regulatory Offset Nuclear Decommissioning Trust Fund Activity
RegulatoryOffsetNuclearDecommissioningTrustFundActivity
394000000 USD
CY2010 exc Gain Loss Investment Income Nuclear Decommissioning Trust Funds
GainLossInvestmentIncomeNuclearDecommissioningTrustFunds
253000000 USD
CY2010 us-gaap Investment Income Interest
InvestmentIncomeInterest
1000000 USD
CY2010 us-gaap Capital Leases Income Statement Direct Financing Lease Revenue
CapitalLeasesIncomeStatementDirectFinancingLeaseRevenue
27000000 USD
CY2010 exc Unrecognized Tax Benefits Interest Income
UnrecognizedTaxBenefitsInterestIncome
0 USD
CY2010 us-gaap Impairment Of Investments
ImpairmentOfInvestments
0 USD
CY2010 us-gaap Gains Losses On Extinguishment Of Debt
GainsLossesOnExtinguishmentOfDebt
0 USD
CY2010 us-gaap Realized Investment Gains Losses
RealizedInvestmentGainsLosses
1000000 USD
CY2010 us-gaap Other Nonoperating Income
OtherNonoperatingIncome
19000000 USD
CY2010 us-gaap Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity
PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity
11000000 USD
CY2009 exc Realized Gain Loss Investment Income Nuclear Decommissioning Trust Funds Regulatory Accounting
RealizedGainLossInvestmentIncomeNuclearDecommissioningTrustFundsRegulatoryAccounting
126000000 USD
CY2009 exc Realized Gain Loss Investment Income Nuclear Decommissioning Trust Funds Nonregulatory Accounting
RealizedGainLossInvestmentIncomeNuclearDecommissioningTrustFundsNonregulatoryAccounting
29000000 USD
CY2009 exc Unrealized Gain Loss Nuclear Decommissioning Trust Funds Regulatory Accounting
UnrealizedGainLossNuclearDecommissioningTrustFundsRegulatoryAccounting
801000000 USD
CY2009 exc Unrealized Gain Loss Nuclear Decommissioning Trust Funds Nonregulatory Accounting
UnrealizedGainLossNuclearDecommissioningTrustFundsNonregulatoryAccounting
227000000 USD
CY2009 exc Regulatory Offset Nuclear Decommissioning Trust Fund Activity
RegulatoryOffsetNuclearDecommissioningTrustFundActivity
746000000 USD
CY2009 exc Gain Loss Investment Income Nuclear Decommissioning Trust Funds
GainLossInvestmentIncomeNuclearDecommissioningTrustFunds
437000000 USD
CY2009 us-gaap Investment Income Interest
InvestmentIncomeInterest
5000000 USD
CY2009 us-gaap Capital Leases Income Statement Direct Financing Lease Revenue
CapitalLeasesIncomeStatementDirectFinancingLeaseRevenue
26000000 USD
CY2009 exc Unrecognized Tax Benefits Interest Income
UnrecognizedTaxBenefitsInterestIncome
50000000 USD
CY2009 us-gaap Gain Loss On Contract Termination
GainLossOnContractTermination
0 USD
CY2009 us-gaap Realized Investment Gains Losses
RealizedInvestmentGainsLosses
5000000 USD
CY2009 us-gaap Impairment Of Investments
ImpairmentOfInvestments
7000000 USD
CY2009 us-gaap Gains Losses On Extinguishment Of Debt
GainsLossesOnExtinguishmentOfDebt
117000000 USD
CY2009 us-gaap Other Nonoperating Income
OtherNonoperatingIncome
19000000 USD
CY2009 us-gaap Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity
PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity
9000000 USD
CY2011 us-gaap Pension And Other Postretirement Benefit Expense
PensionAndOtherPostretirementBenefitExpense
542000000 USD
CY2011 us-gaap Provision For Doubtful Accounts
ProvisionForDoubtfulAccounts
121000000 USD
CY2011 us-gaap Share Based Compensation
ShareBasedCompensation
67000000 USD
CY2011 exc Other Decommissioning Related Activity
OtherDecommissioningRelatedActivity
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CY2011 exc Energy Related Options
EnergyRelatedOptions
137000000 USD
CY2011 exc Amortization Of Regulatory Asset Debt Costs
AmortizationOfRegulatoryAssetDebtCosts
21000000 USD
CY2011 exc Under Over Recovered Uncollectible Accounts
UnderOverRecoveredUncollectibleAccounts
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CY2011 exc Inventory Adjustments During Period
InventoryAdjustmentsDuringPeriod
0 USD
CY2011 exc Other Noncash Income Expense Net
OtherNoncashIncomeExpenseNet
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CY2011 us-gaap Increase Decrease In Over Under Energy Recovery
IncreaseDecreaseInOverUnderEnergyRecovery
45000000 USD
CY2011 exc Increase Decrease In Other Current Operating Assets
IncreaseDecreaseInOtherCurrentOperatingAssets
101000000 USD
CY2011 exc Increase Decrease In Other Noncurrent Operating Assets Liabilities
IncreaseDecreaseInOtherNoncurrentOperatingAssetsLiabilities
-126000000 USD
CY2011 exc Asset Retirement Obligation Reduction
AssetRetirementObligationReduction
0 USD
CY2011 exc Impacts Two Thousand Ten Rate Case
ImpactsTwoThousandTenRateCase
-32000000 USD
CY2011 us-gaap Interest Paid Net
InterestPaidNet
649000000 USD
CY2011 us-gaap Income Taxes Paid Net
IncomeTaxesPaidNet
-457000000 USD
CY2011 exc Impacts Energy Infrastructure Modernization Act
ImpactsEnergyInfrastructureModernizationAct
-82000000 USD
CY2011 exc Capitalized Costs Incurred Asset Retirement Obligation
CapitalizedCostsIncurredAssetRetirementObligation
186000000 USD
CY2011 us-gaap Capital Expenditures Incurred But Not Yet Paid
CapitalExpendituresIncurredButNotYetPaid
96000000 USD
CY2011 exc Noncash Purchase Accounting Adjustment
NoncashPurchaseAccountingAdjustment
0 USD
CY2010 us-gaap Pension And Other Postretirement Benefit Expense
PensionAndOtherPostretirementBenefitExpense
581000000 USD
CY2010 us-gaap Provision For Doubtful Accounts
ProvisionForDoubtfulAccounts
108000000 USD
CY2010 us-gaap Share Based Compensation
ShareBasedCompensation
44000000 USD
CY2010 exc Other Decommissioning Related Activity
OtherDecommissioningRelatedActivity
91000000 USD
CY2010 exc Energy Related Options
EnergyRelatedOptions
-73000000 USD
CY2010 exc Asset Retirement Obligation Reduction
AssetRetirementObligationReduction
-19000000 USD
CY2010 exc Amortization Of Regulatory Asset Debt Costs
AmortizationOfRegulatoryAssetDebtCosts
24000000 USD
CY2010 exc Other Noncash Income Expense Net
OtherNoncashIncomeExpenseNet
5000000 USD
CY2010 us-gaap Increase Decrease In Over Under Energy Recovery
IncreaseDecreaseInOverUnderEnergyRecovery
-61000000 USD
CY2010 exc Increase Decrease In Other Current Operating Assets
IncreaseDecreaseInOtherCurrentOperatingAssets
18000000 USD
CY2010 exc Increase Decrease In Other Noncurrent Operating Assets Liabilities
IncreaseDecreaseInOtherNoncurrentOperatingAssetsLiabilities
99000000 USD
CY2010 exc Supplemental Cash Flow Loss In Equity Method Investments
SupplementalCashFlowLossInEquityMethodInvestments
0 USD
CY2010 exc Allowance For Obsolete Inventory
AllowanceForObsoleteInventory
12000000 USD
CY2010 exc Taxes Other Than Income Refund Accrual
TaxesOtherThanIncomeRefundAccrual
25000000 USD
CY2010 exc Under Over Recovered Uncollectible Accounts
UnderOverRecoveredUncollectibleAccounts
14000000 USD
CY2010 exc Inventory Adjustments During Period
InventoryAdjustmentsDuringPeriod
-57000000 USD
CY2010 us-gaap Interest Paid Net
InterestPaidNet
665000000 USD
CY2010 us-gaap Income Taxes Paid Net
IncomeTaxesPaidNet
1219000000 USD
CY2010 exc Capitalized Costs Incurred Asset Retirement Obligation
CapitalizedCostsIncurredAssetRetirementObligation
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CY2010 us-gaap Capital Expenditures Incurred But Not Yet Paid
CapitalExpendituresIncurredButNotYetPaid
34000000 USD
CY2010 exc Noncash Purchase Accounting Adjustment
NoncashPurchaseAccountingAdjustment
9000000 USD
CY2010Q4 us-gaap Business Acquisition Contingent Consideration At Fair Value
BusinessAcquisitionContingentConsiderationAtFairValue
32000000 USD
CY2009 us-gaap Pension And Other Postretirement Benefit Expense
PensionAndOtherPostretirementBenefitExpense
536000000 USD
CY2009 us-gaap Provision For Doubtful Accounts
ProvisionForDoubtfulAccounts
149000000 USD
CY2009 us-gaap Share Based Compensation
ShareBasedCompensation
70000000 USD
CY2009 exc Other Decommissioning Related Activity
OtherDecommissioningRelatedActivity
163000000 USD
CY2009 exc Energy Related Options
EnergyRelatedOptions
46000000 USD
CY2009 exc Amortization Of Regulatory Asset Debt Costs
AmortizationOfRegulatoryAssetDebtCosts
25000000 USD
CY2009 exc Increase Decrease In Other Noncurrent Operating Assets Liabilities
IncreaseDecreaseInOtherNoncurrentOperatingAssetsLiabilities
134000000 USD
CY2009 exc Amortization Of Regulatory Liability Real Estate Taxes
AmortizationOfRegulatoryLiabilityRealEstateTaxes
2000000 USD
CY2009 exc Other Noncash Income Expense Net
OtherNoncashIncomeExpenseNet
-13000000 USD
CY2009 us-gaap Increase Decrease In Over Under Energy Recovery
IncreaseDecreaseInOverUnderEnergyRecovery
-23000000 USD
CY2009 exc Increase Decrease In Other Current Operating Assets
IncreaseDecreaseInOtherCurrentOperatingAssets
2000000 USD
CY2009 exc Supplemental Cash Flow Loss In Equity Method Investments
SupplementalCashFlowLossInEquityMethodInvestments
-27000000 USD
CY2009 exc Rate Case Order Net Impact
RateCaseOrderNetImpact
0 USD
CY2009 exc Reduction Of Guarantees
ReductionOfGuarantees
0 USD
CY2009 exc Asset Retirement Obligation Reduction
AssetRetirementObligationReduction
-47000000 USD
CY2009 us-gaap Inventory Write Down
InventoryWriteDown
17000000 USD
CY2009 us-gaap Interest Paid Net
InterestPaidNet
647000000 USD
CY2009 us-gaap Income Taxes Paid Net
IncomeTaxesPaidNet
982000000 USD
CY2009 exc Capitalized Costs Incurred Asset Retirement Obligation
CapitalizedCostsIncurredAssetRetirementObligation
67000000 USD
CY2009 exc Noncash Purchase Accounting Adjustment
NoncashPurchaseAccountingAdjustment
9000000 USD
CY2009 us-gaap Capital Expenditures Incurred But Not Yet Paid
CapitalExpendituresIncurredButNotYetPaid
70000000 USD
CY2011Q4 exc Total Long Term Investments
TotalLongTermInvestments
766000000 USD
CY2011Q4 us-gaap Equity Method Investments
EquityMethodInvestments
45000000 USD
CY2010Q4 us-gaap Equity Method Investments
EquityMethodInvestments
39000000 USD
CY2010Q4 exc Total Long Term Investments
TotalLongTermInvestments
732000000 USD
CY2000Q4 us-gaap Capital Leases Net Investment In Direct Financing Leases Unguaranteed Residual Values Of Leased Property
CapitalLeasesNetInvestmentInDirectFinancingLeasesUnguaranteedResidualValuesOfLeasedProperty
1600000000 USD
CY2000Q4 exc Capital Leases Net Investment In Direct Financing Leases Prepayments Received
CapitalLeasesNetInvestmentInDirectFinancingLeasesPrepaymentsReceived
1200000000 USD
CY2011Q4 us-gaap Capital Leases Net Investment In Direct Financing Leases Unguaranteed Residual Values Of Leased Property
CapitalLeasesNetInvestmentInDirectFinancingLeasesUnguaranteedResidualValuesOfLeasedProperty
1492000000 USD
CY2010Q4 us-gaap Capital Leases Net Investment In Direct Financing Leases Unguaranteed Residual Values Of Leased Property
CapitalLeasesNetInvestmentInDirectFinancingLeasesUnguaranteedResidualValuesOfLeasedProperty
1492000000 USD
CY2011Q4 us-gaap Capital Leases Net Investment In Direct Financing Leases Deferred Income
CapitalLeasesNetInvestmentInDirectFinancingLeasesDeferredIncome
836000000 USD
CY2010Q4 us-gaap Capital Leases Net Investment In Direct Financing Leases Deferred Income
CapitalLeasesNetInvestmentInDirectFinancingLeasesDeferredIncome
863000000 USD
CY2010Q4 us-gaap Capital Leases Net Investment In Direct Financing Leases
CapitalLeasesNetInvestmentInDirectFinancingLeases
629000000 USD
CY2011Q4 exc Accrued Compensation Current
AccruedCompensationCurrent
520000000 USD
CY2010Q4 exc Accrued Compensation Current
AccruedCompensationCurrent
465000000 USD
CY2011Q4 us-gaap Taxes Payable Current
TaxesPayableCurrent
297000000 USD
CY2010Q4 us-gaap Taxes Payable Current
TaxesPayableCurrent
297000000 USD
CY2011Q4 us-gaap Interest Payable Current
InterestPayableCurrent
192000000 USD
CY2010Q4 us-gaap Interest Payable Current
InterestPayableCurrent
195000000 USD
CY2011Q4 exc Accrued Severance Current
AccruedSeveranceCurrent
15000000 USD
CY2010Q4 exc Accrued Severance Current
AccruedSeveranceCurrent
22000000 USD
CY2011Q4 us-gaap Other Accrued Liabilities Current
OtherAccruedLiabilitiesCurrent
231000000 USD
CY2010Q4 us-gaap Other Accrued Liabilities Current
OtherAccruedLiabilitiesCurrent
61000000 USD
CY2011Q4 us-gaap Accumulated Other Comprehensive Income Loss Cumulative Changes In Net Gain Loss From Cash Flow Hedges Effect Net Of Tax
AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax
488000000 USD
CY2011Q4 us-gaap Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax
AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax
2938000000 USD
CY2010Q4 us-gaap Accumulated Other Comprehensive Income Loss Cumulative Changes In Net Gain Loss From Cash Flow Hedges Effect Net Of Tax
AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax
400000000 USD
CY2010Q4 us-gaap Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax
AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax
2823000000 USD
CY2010Q4 exc Accumulated Unrealized Gain Loss Marketable Securities
AccumulatedUnrealizedGainLossMarketableSecurities
0 USD
CY2011 us-gaap Segment Reporting Information Revenue
SegmentReportingInformationRevenue
18924000000 USD
CY2010 us-gaap Segment Reporting Information Revenue
SegmentReportingInformationRevenue
18644000000 USD
CY2009 us-gaap Segment Reporting Information Revenue
SegmentReportingInformationRevenue
17318000000 USD
CY2011 us-gaap Revenues From Transactions With Other Operating Segments Of Same Entity
RevenuesFromTransactionsWithOtherOperatingSegmentsOfSameEntity
9000000 USD
CY2010 us-gaap Revenues From Transactions With Other Operating Segments Of Same Entity
RevenuesFromTransactionsWithOtherOperatingSegmentsOfSameEntity
6000000 USD
CY2009 us-gaap Revenues From Transactions With Other Operating Segments Of Same Entity
RevenuesFromTransactionsWithOtherOperatingSegmentsOfSameEntity
9000000 USD
CY2011 us-gaap Depreciation Depletion And Amortization
DepreciationDepletionAndAmortization
1335000000 USD
CY2010 us-gaap Depreciation Depletion And Amortization
DepreciationDepletionAndAmortization
2075000000 USD
CY2009 us-gaap Depreciation Depletion And Amortization
DepreciationDepletionAndAmortization
1834000000 USD
CY2011 us-gaap Noninterest Expense
NoninterestExpense
14444000000 USD
CY2010 us-gaap Noninterest Expense
NoninterestExpense
13918000000 USD
CY2009 us-gaap Noninterest Expense
NoninterestExpense
12568000000 USD
CY2011 us-gaap Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest
IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
3952000000 USD
CY2010 us-gaap Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest
IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
4221000000 USD
CY2009 us-gaap Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest
IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
4419000000 USD
CY2009 us-gaap Profit Loss
ProfitLoss
2707000000 USD
CY2011 us-gaap Profit Loss
ProfitLoss
2495000000 USD
CY2010 us-gaap Profit Loss
ProfitLoss
2563000000 USD
CY2011 us-gaap Additions To Noncurrent Assets
AdditionsToNoncurrentAssets
4042000000 USD
CY2010 us-gaap Additions To Noncurrent Assets
AdditionsToNoncurrentAssets
3326000000 USD
CY2009 us-gaap Additions To Noncurrent Assets
AdditionsToNoncurrentAssets
3273000000 USD
CY2011 exc Segment Reporting Interest Expense
SegmentReportingInterestExpense
726000000 USD
CY2010 exc Segment Reporting Interest Expense
SegmentReportingInterestExpense
817000000 USD
CY2009 exc Segment Reporting Interest Expense
SegmentReportingInterestExpense
731000000 USD
CY2011 us-gaap Related Party Transaction Revenues From Transactions With Related Party
RelatedPartyTransactionRevenuesFromTransactionsWithRelatedParty
9000000 USD
CY2010 us-gaap Related Party Transaction Revenues From Transactions With Related Party
RelatedPartyTransactionRevenuesFromTransactionsWithRelatedParty
6000000 USD
CY2009 us-gaap Related Party Transaction Revenues From Transactions With Related Party
RelatedPartyTransactionRevenuesFromTransactionsWithRelatedParty
12000000 USD
CY2011 exc Related Party Transaction Utilities Operating Expense Fuel Used Total
RelatedPartyTransactionUtilitiesOperatingExpenseFuelUsedTotal
137000000 USD
CY2010 exc Related Party Transaction Utilities Operating Expense Fuel Used Total
RelatedPartyTransactionUtilitiesOperatingExpenseFuelUsedTotal
144000000 USD
CY2009 exc Related Party Transaction Utilities Operating Expense Fuel Used Total
RelatedPartyTransactionUtilitiesOperatingExpenseFuelUsedTotal
125000000 USD
CY2011 exc Related Party Transaction Charitable Contribution
RelatedPartyTransactionCharitableContribution
0 USD
CY2010 exc Related Party Transaction Charitable Contribution
RelatedPartyTransactionCharitableContribution
10000000 USD
CY2009 exc Related Party Transaction Charitable Contribution
RelatedPartyTransactionCharitableContribution
10000000 USD
CY2011Q4 us-gaap Due To Affiliate Current
DueToAffiliateCurrent
5000000 USD
CY2010Q4 us-gaap Due To Affiliate Current
DueToAffiliateCurrent
5000000 USD
CY2011Q4 exc Long Term Debt To Financing Trusts Fair Value Disclosure
LongTermDebtToFinancingTrustsFairValueDisclosure
390000000 USD
CY2010Q4 exc Long Term Debt To Financing Trusts Fair Value Disclosure
LongTermDebtToFinancingTrustsFairValueDisclosure
390000000 USD
CY2010Q1 us-gaap Revenues
Revenues
4461000000 USD
CY2010Q2 us-gaap Revenues
Revenues
4398000000 USD
CY2010Q3 us-gaap Revenues
Revenues
5291000000 USD
CY2010Q4 us-gaap Revenues
Revenues
4494000000 USD
CY2010Q1 us-gaap Operating Income Loss
OperatingIncomeLoss
1402000000 USD
CY2010Q2 us-gaap Operating Income Loss
OperatingIncomeLoss
1018000000 USD
CY2010Q3 us-gaap Operating Income Loss
OperatingIncomeLoss
1367000000 USD
CY2010Q4 us-gaap Operating Income Loss
OperatingIncomeLoss
939000000 USD
CY2011Q2 us-gaap Net Income Loss
NetIncomeLoss
620000000 USD
CY2011Q3 us-gaap Net Income Loss
NetIncomeLoss
601000000 USD
CY2011Q4 us-gaap Net Income Loss
NetIncomeLoss
606000000 USD
CY2010Q1 us-gaap Net Income Loss
NetIncomeLoss
749000000 USD
CY2010Q2 us-gaap Net Income Loss
NetIncomeLoss
445000000 USD
CY2010Q3 us-gaap Net Income Loss
NetIncomeLoss
845000000 USD
CY2010Q4 us-gaap Net Income Loss
NetIncomeLoss
524000000 USD
CY2011Q1 us-gaap Net Income Loss
NetIncomeLoss
668000000 USD
CY2011Q1 us-gaap Revenues
Revenues
5052000000 USD
CY2011Q2 us-gaap Revenues
Revenues
4587000000 USD
CY2011Q3 us-gaap Revenues
Revenues
5295000000 USD
CY2011Q4 us-gaap Revenues
Revenues
3991000000 USD
CY2011Q1 us-gaap Operating Income Loss
OperatingIncomeLoss
1202000000 USD
CY2011Q2 us-gaap Operating Income Loss
OperatingIncomeLoss
1034000000 USD
CY2011Q3 us-gaap Operating Income Loss
OperatingIncomeLoss
1181000000 USD
CY2011Q4 us-gaap Operating Income Loss
OperatingIncomeLoss
1062000000 USD
CY2011Q1 us-gaap Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
662000000 shares
CY2011Q2 us-gaap Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
663000000 shares
CY2011Q3 us-gaap Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
663000000 shares
CY2011Q4 us-gaap Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
664000000 shares
CY2010Q1 us-gaap Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
661000000 shares
CY2010Q2 us-gaap Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
661000000 shares
CY2010Q3 us-gaap Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
662000000 shares
CY2010Q4 us-gaap Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
662000000 shares
CY2011Q4 us-gaap Earnings Per Share Basic
EarningsPerShareBasic
0.91
CY2010Q1 us-gaap Earnings Per Share Basic
EarningsPerShareBasic
1.13
CY2010Q2 us-gaap Earnings Per Share Basic
EarningsPerShareBasic
0.67
CY2010Q3 us-gaap Earnings Per Share Basic
EarningsPerShareBasic
1.28
CY2010Q4 us-gaap Earnings Per Share Basic
EarningsPerShareBasic
0.79
CY2011Q1 us-gaap Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
664000000 shares
CY2011Q2 us-gaap Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
664000000 shares
CY2011Q3 us-gaap Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
665000000 shares
CY2011Q4 us-gaap Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
666000000 shares
CY2010Q1 us-gaap Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
662000000 shares
CY2010Q2 us-gaap Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
662000000 shares
CY2010Q3 us-gaap Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
663000000 shares
CY2010Q4 us-gaap Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
663000000 shares
CY2011Q1 us-gaap Earnings Per Share Diluted
EarningsPerShareDiluted
1.01
CY2011Q2 us-gaap Earnings Per Share Diluted
EarningsPerShareDiluted
0.93
CY2011Q3 us-gaap Earnings Per Share Diluted
EarningsPerShareDiluted
0.90
CY2011Q4 us-gaap Earnings Per Share Diluted
EarningsPerShareDiluted
0.91
CY2010Q1 us-gaap Earnings Per Share Diluted
EarningsPerShareDiluted
1.13
CY2010Q2 us-gaap Earnings Per Share Diluted
EarningsPerShareDiluted
0.67
CY2010Q3 us-gaap Earnings Per Share Diluted
EarningsPerShareDiluted
1.27
CY2010Q4 us-gaap Earnings Per Share Diluted
EarningsPerShareDiluted
0.79
CY2011Q1 us-gaap Earnings Per Share Basic
EarningsPerShareBasic
1.01
CY2011Q2 us-gaap Earnings Per Share Basic
EarningsPerShareBasic
0.93
CY2011Q3 us-gaap Earnings Per Share Basic
EarningsPerShareBasic
0.91
CY2011Q4 exc High Share Price
HighSharePrice
45.45 USD
CY2011Q4 exc Low Share Price
LowSharePrice
39.93 USD
CY2011Q4 exc Close Share Price
CloseSharePrice
43.37 USD
CY2011Q4 us-gaap Dividends Payable Amount Per Share
DividendsPayableAmountPerShare
0.525
CY2011Q3 exc High Share Price
HighSharePrice
45.27 USD
CY2011Q3 exc Low Share Price
LowSharePrice
39.51 USD
CY2011Q3 exc Close Share Price
CloseSharePrice
42.61 USD
CY2011Q3 us-gaap Dividends Payable Amount Per Share
DividendsPayableAmountPerShare
0.525
CY2011Q2 exc High Share Price
HighSharePrice
42.89 USD
CY2011Q2 exc Low Share Price
LowSharePrice
39.53 USD
CY2011Q2 exc Close Share Price
CloseSharePrice
42.84 USD
CY2011Q2 us-gaap Dividends Payable Amount Per Share
DividendsPayableAmountPerShare
0.525
CY2011Q1 us-gaap Dividends Payable Amount Per Share
DividendsPayableAmountPerShare
0.525
CY2011Q1 exc Close Share Price
CloseSharePrice
41.24 USD
CY2011Q1 exc Low Share Price
LowSharePrice
39.06 USD
CY2011Q1 exc High Share Price
HighSharePrice
43.58 USD
CY2010Q4 exc High Share Price
HighSharePrice
44.49 USD
CY2010Q4 exc Low Share Price
LowSharePrice
39.05 USD
CY2010Q4 exc Close Share Price
CloseSharePrice
41.64 USD
CY2010Q4 us-gaap Dividends Payable Amount Per Share
DividendsPayableAmountPerShare
0.525
CY2010Q3 us-gaap Dividends Payable Amount Per Share
DividendsPayableAmountPerShare
0.525
CY2010Q3 exc Close Share Price
CloseSharePrice
42.58 USD
CY2010Q3 exc Low Share Price
LowSharePrice
37.63 USD
CY2010Q3 exc High Share Price
HighSharePrice
43.32 USD
CY2010Q2 exc High Share Price
HighSharePrice
45.10 USD
CY2010Q2 exc Low Share Price
LowSharePrice
37.24 USD
CY2010Q2 exc Close Share Price
CloseSharePrice
37.97 USD
CY2010Q2 us-gaap Dividends Payable Amount Per Share
DividendsPayableAmountPerShare
0.525
CY2010Q1 us-gaap Dividends Payable Amount Per Share
DividendsPayableAmountPerShare
0.525
CY2010Q1 exc Close Share Price
CloseSharePrice
43.81 USD
CY2010Q1 exc Low Share Price
LowSharePrice
42.97 USD
CY2010Q1 exc High Share Price
HighSharePrice
49.88 USD
CY2012Q1 us-gaap Dividends Payable Amount Per Share
DividendsPayableAmountPerShare
0.525

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