$FE
FirstEnergy Corp Stock $fe

$fe Overview Financials Valuation SEC Filings Company Website

2011 Form 10-K Financial Statement

#000103129612000012 Filed on February 28, 2012

Income Statement

Concept	2011	2010 Q4	2010
Revenue	$16.11B	$3.171B	$13.34B
YoY Change	20.74%	7.13%	2.87%
Cost Of Revenue	$4.874B	$1.004B	$4.624B
YoY Change	5.41%	-19.68%	-2.24%
Gross Profit	$11.23B	$2.167B	$8.715B
YoY Change	28.87%	26.73%	5.73%
Gross Profit Margin	69.74%	68.34%	65.33%
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$1.391B	$185.0M	$750.0M
YoY Change	85.47%	-10.63%	-0.92%
% of Gross Profit	12.39%	8.54%	8.61%
Operating Expenses	$8.660B	$1.497B	$6.394B
YoY Change	35.44%	2.46%	2.58%
Operating Profit	$1.677B	$670.0M	$1.743B
YoY Change	-3.79%	169.08%	3.57%
Interest Expense	$1.008B	-$150.0M	-$563.0M
YoY Change	-279.04%	-21.88%	-12.44%
% of Operating Profit	60.11%	-22.39%	-32.3%
Other Income/Expense, Net	-$255.0M		-$563.0M
YoY Change	-54.71%		-12.44%
Pretax Income	$1.422B	$236.0M	$1.180B
YoY Change	20.51%	362.75%	13.46%
Income Tax	$566.0M	$98.00M	$462.0M
% Of Pretax Income	39.8%	41.53%	39.15%
Net Earnings	$885.0M	$143.0M	$742.0M
YoY Change	19.27%	-39.92%	-14.91%
Net Earnings / Revenue	5.5%	4.51%	5.56%
Basic Earnings Per Share	$2.22		$2.44
Diluted Earnings Per Share	$2.21	$468.9K	$2.42
COMMON SHARES
Basic Shares Outstanding	399.0M shares		304.0M shares
Diluted Shares Outstanding	401.0M shares		305.0M shares

Balance Sheet

Concept	2011	2010 Q4	2010
SHORT-TERM ASSETS
Cash & Short-Term Investments	$202.0M	$1.019B	$1.019B
YoY Change	-80.18%	16.59%	16.59%
Cash & Equivalents	$202.0M	$1.019B	$1.019B
Short-Term Investments
Other Short-Term Assets	$548.0M	$92.00M	$473.0M
YoY Change	15.86%	-40.26%	17.66%
Inventory	$811.0M	$638.0M	$638.0M
Prepaid Expenses
Receivables	$1.525B	$1.392B	$1.392B
Other Receivables	$269.0M	$176.0M	$176.0M
Total Short-Term Assets	$3.355B	$3.698B	$3.698B
YoY Change	-9.28%	11.39%	11.39%
LONG-TERM ASSETS
Property, Plant & Equipment	$30.34B	$20.51B	$20.51B
YoY Change	47.91%	7.02%	7.02%
Goodwill		$5.575B
YoY Change		0.0%
Intangibles		$256.0M
YoY Change
Long-Term Investments	$1.410B	$1.029B	$1.029B
YoY Change	37.03%	-11.6%	-11.6%
Other Assets	$5.783B	$916.0M	$4.719B
YoY Change	22.55%	37.54%	-3.32%
Total Long-Term Assets	$43.97B	$8.321B	$31.83B
YoY Change	38.13%	-5.41%	2.74%
TOTAL ASSETS
Total Short-Term Assets	$3.355B	$3.698B	$3.698B
Total Long-Term Assets	$43.97B	$8.321B	$31.83B
Total Assets	$47.33B	$35.53B	$35.53B
YoY Change	33.2%	1.36%	3.58%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$1.174B	$872.0M	$872.0M
YoY Change	34.63%	5.19%	5.19%
Accrued Expenses	$384.0M	$315.0M	$315.0M
YoY Change	21.9%	7.51%	7.51%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$700.0M	$700.0M
YoY Change	-100.0%	-40.73%	-35.25%
Long-Term Debt Due	$1.621B	-$1.486B	$1.486B
YoY Change	9.08%	-181.03%	-18.97%
Total Short-Term Liabilities	$4.855B	$4.704B	$4.704B
YoY Change	3.21%	-11.04%	-9.33%
LONG-TERM LIABILITIES
Long-Term Debt	$15.72B	$12.58B	$12.58B
YoY Change	24.94%	4.76%	4.76%
Other Long-Term Liabilities	$7.786B	$1.436B	$6.136B
YoY Change	26.89%	17.13%	0.87%
Total Long-Term Liabilities	$23.50B	$9.296B	$18.72B
YoY Change	25.58%	8.71%	3.45%
TOTAL LIABILITIES
Total Short-Term Liabilities	$4.855B	$4.704B	$4.704B
Total Long-Term Liabilities	$23.50B	$9.296B	$18.72B
Total Liabilities	$34.05B	$14.00B	$26.55B
YoY Change	28.25%	1.16%	3.12%
SHAREHOLDERS EQUITY
Retained Earnings		$3.084B
YoY Change		-31.39%
Common Stock		$5.444B
YoY Change		-0.07%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$13.28B	$8.984B	$8.984B
YoY Change
Total Liabilities & Shareholders Equity	$47.33B	$35.53B	$35.53B
YoY Change	33.2%	3.58%	3.58%

Cashflow Statement

Concept	2011	2010 Q4	2010
OPERATING ACTIVITIES
Net Income	$885.0M	$143.0M	$742.0M
YoY Change	19.27%	-39.92%	-14.91%
Depreciation, Depletion And Amortization	$1.391B	$185.0M	$750.0M
YoY Change	85.47%	-10.63%	-0.92%
Cash From Operating Activities	$3.063B	$1.003B	$3.076B
YoY Change	-0.42%	0.2%	24.79%
INVESTING ACTIVITIES
Capital Expenditures	-$2.278B	-$499.0M	-$2.076B
YoY Change	9.73%	-20.54%	-5.76%
Acquisitions
YoY Change
Other Investing Activities	-$48.00M	-$4.000M	-$27.00M
YoY Change	77.78%	-101.73%	-50.91%
Cash From Investing Activities	-$956.0M	-$503.0M	-$1.948B
YoY Change	-50.92%	26.7%	-10.85%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net	$1.909B		$1.015B
YoY Change	88.08%		-61.11%
Cash From Financing Activities	-$2.924B	-113.0M	-$983.0M
YoY Change	197.46%	-80.11%	-2106.12%
NET CHANGE
Cash From Operating Activities	$3.063B	1.003B	$3.076B
Cash From Investing Activities	-$956.0M	-503.0M	-$1.948B
Cash From Financing Activities	-$2.924B	-113.0M	-$983.0M
Net Change In Cash	-$817.0M	387.0M	$145.0M
YoY Change	-663.45%	975.0%	-55.93%
FREE CASH FLOW
Cash From Operating Activities	$3.063B	$1.003B	$3.076B
Capital Expenditures	-$2.278B	-$499.0M	-$2.076B
Free Cash Flow	$5.341B	$1.502B	$5.152B
YoY Change	3.67%	-7.8%	10.37%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2009	us-gaap	Excise Taxes Collected ExciseTaxesCollected	395000000	USD
CY2010	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	228000000	USD
CY2011Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	1174000000	USD
CY2010Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	872000000	USD
CY2011Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	1525000000	USD
CY2010Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	1392000000	USD
CY2010Q4	us-gaap	Accrued Employee Benefits Current AccruedEmployeeBenefitsCurrent	315000000	USD
CY2011Q4	us-gaap	Accrued Employee Benefits Current AccruedEmployeeBenefitsCurrent	384000000	USD
CY2010Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	332000000	USD
CY2011Q1	us-gaap	Business Acquisition Purchase Price Allocation Property Plant And Equipment BusinessAcquisitionPurchasePriceAllocationPropertyPlantAndEquipment	9660000000	USD
CY2011Q1	us-gaap	Business Acquisition Purchase Price Allocation Current Liabilities BusinessAcquisitionPurchasePriceAllocationCurrentLiabilities	718000000	USD
CY2011Q1	us-gaap	Business Acquisition Purchase Price Allocation Goodwill Amount BusinessAcquisitionPurchasePriceAllocationGoodwillAmount	866000000	USD
CY2011Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	558000000	USD
CY2010Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	11283000000	USD
CY2011Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	11839000000	USD
CY2011Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	426000000	USD
CY2010Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	425000000	USD
CY2010Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	5444000000	USD
CY2011Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	9765000000	USD
CY2011	us-gaap	Amortization Of Regulatory Asset AmortizationOfRegulatoryAsset	329000000	USD
CY2010	us-gaap	Amortization Of Regulatory Asset AmortizationOfRegulatoryAsset	722000000	USD
CY2009	us-gaap	Amortization Of Regulatory Asset AmortizationOfRegulatoryAsset	1019000000	USD
CY2009	us-gaap	Asset Impairment Charges AssetImpairmentCharges	6000000	USD
CY2010	us-gaap	Asset Impairment Charges AssetImpairmentCharges	388000000	USD
CY2011	us-gaap	Asset Impairment Charges AssetImpairmentCharges	413000000	USD
CY2011Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	1497000000	USD
CY2010Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	1407000000	USD
CY2010Q4	us-gaap	Assets Assets	35531000000	USD
CY2011Q4	us-gaap	Assets Assets	47326000000	USD
CY2009Q4	us-gaap	Assets Assets	35054000000	USD
CY2010Q4	us-gaap	Assets Current AssetsCurrent	3698000000	USD
CY2011Q4	us-gaap	Assets Current AssetsCurrent	3355000000	USD
CY2011Q4	us-gaap	Assets Noncurrent AssetsNoncurrent	10112000000	USD
CY2010Q4	us-gaap	Assets Noncurrent AssetsNoncurrent	8321000000	USD
CY2011	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	229000000	USD
CY2009	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	226000000	USD
CY2010	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	126000000	USD
CY2011	us-gaap	Available For Sale Securities Gross Realized Gains Losses Sale Proceeds AvailableForSaleSecuritiesGrossRealizedGainsLossesSaleProceeds	4207000000	USD
CY2009	us-gaap	Available For Sale Securities Gross Realized Gains Losses Sale Proceeds AvailableForSaleSecuritiesGrossRealizedGainsLossesSaleProceeds	2229000000	USD
CY2010	us-gaap	Available For Sale Securities Gross Realized Gains Losses Sale Proceeds AvailableForSaleSecuritiesGrossRealizedGainsLossesSaleProceeds	3172000000	USD
CY2011	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	90000000	USD
CY2009	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	155000000	USD
CY2010	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	107000000	USD
CY2011Q1	us-gaap	Business Acquisition Cost Of Acquired Entity Liabilities Incurred BusinessAcquisitionCostOfAcquiredEntityLiabilitiesIncurred	27000000	USD
CY2011Q1	us-gaap	Business Acquisition Cost Of Acquired Entity Purchase Price BusinessAcquisitionCostOfAcquiredEntityPurchasePrice	4327000000	USD
CY2010	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	2.83
CY2011	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	2.34
CY2010	us-gaap	Business Acquisition Pro Forma Earnings Per Share Diluted BusinessAcquisitionProFormaEarningsPerShareDiluted	2.82
CY2011	us-gaap	Business Acquisition Pro Forma Earnings Per Share Diluted BusinessAcquisitionProFormaEarningsPerShareDiluted	2.33
CY2011Q4	us-gaap	Business Acquisition Purchase Price Allocation Amortizable Intangible Assets BusinessAcquisitionPurchasePriceAllocationAmortizableIntangibleAssets	568000000	USD
CY2011Q1	us-gaap	Business Acquisition Purchase Price Allocation Assets Acquired Liabilities Assumed Net BusinessAcquisitionPurchasePriceAllocationAssetsAcquiredLiabilitiesAssumedNet	4354000000	USD
CY2011Q1	us-gaap	Business Acquisition Purchase Price Allocation Current Assets BusinessAcquisitionPurchasePriceAllocationCurrentAssets	1493000000	USD
CY2011Q1	us-gaap	Business Acquisition Purchase Price Allocation Noncurrent Liabilities BusinessAcquisitionPurchasePriceAllocationNoncurrentLiabilities	3444000000	USD
CY2011Q1	us-gaap	Business Acquisition Purchase Price Allocation Noncurrent Liabilities Long Term Debt BusinessAcquisitionPurchasePriceAllocationNoncurrentLiabilitiesLongTermDebt	4994000000	USD
CY2011Q1	us-gaap	Business Acquisition Purchase Price Allocation Other Noncurrent Assets BusinessAcquisitionPurchasePriceAllocationOtherNoncurrentAssets	1353000000	USD
CY2009	us-gaap	Cash Acquired From Acquisition CashAcquiredFromAcquisition	0	USD
CY2011	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	979000000	USD
CY2010	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	1183000000	USD
CY2010	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	18569000000	USD
CY2011	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	17449000000	USD
CY2011Q1	us-gaap	Business Combination Consideration Transferred BusinessCombinationConsiderationTransferred	4354000000	USD
CY2011Q4	us-gaap	Capital Lease Obligations CapitalLeaseObligations	108000000	USD
CY2010Q4	us-gaap	Capital Lease Obligations CapitalLeaseObligations	54000000	USD
CY2011Q4	us-gaap	Capital Lease Obligations Current CapitalLeaseObligationsCurrent	23000000	USD
CY2011Q4	us-gaap	Capital Lease Obligations Noncurrent CapitalLeaseObligationsNoncurrent	85000000	USD
CY2011Q4	us-gaap	Capital Leases Future Minimum Payments Due CapitalLeasesFutureMinimumPaymentsDue	135000000	USD
CY2011Q4	us-gaap	Capital Leases Future Minimum Payments Due Current CapitalLeasesFutureMinimumPaymentsDueCurrent	25000000	USD
CY2011Q4	us-gaap	Capital Leases Future Minimum Payments Due In Five Years CapitalLeasesFutureMinimumPaymentsDueInFiveYears	17000000	USD
CY2011Q4	us-gaap	Capital Leases Future Minimum Payments Due In Four Years CapitalLeasesFutureMinimumPaymentsDueInFourYears	20000000	USD
CY2011Q4	us-gaap	Capital Leases Future Minimum Payments Due In Three Years CapitalLeasesFutureMinimumPaymentsDueInThreeYears	22000000	USD
CY2011Q4	us-gaap	Capital Leases Future Minimum Payments Due In Two Years CapitalLeasesFutureMinimumPaymentsDueInTwoYears	24000000	USD
CY2011Q4	us-gaap	Capital Leases Future Minimum Payments Due Thereafter CapitalLeasesFutureMinimumPaymentsDueThereafter	27000000	USD
CY2011Q4	us-gaap	Capital Leases Future Minimum Payments Executory Costs CapitalLeasesFutureMinimumPaymentsExecutoryCosts	0	USD
CY2011Q4	us-gaap	Capital Leases Future Minimum Payments Interest Included In Payments CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments	27000000	USD
CY2011Q4	us-gaap	Capital Leases Future Minimum Payments Net Minimum Payments CapitalLeasesFutureMinimumPaymentsNetMinimumPayments	135000000	USD
CY2011Q4	us-gaap	Capital Leases Future Minimum Payments Present Value Of Net Minimum Payments CapitalLeasesFutureMinimumPaymentsPresentValueOfNetMinimumPayments	108000000	USD
CY2009	us-gaap	Capital Leases Income Statement Interest Expense CapitalLeasesIncomeStatementInterestExpense	1000000	USD
CY2011	us-gaap	Capital Leases Income Statement Interest Expense CapitalLeasesIncomeStatementInterestExpense	6000000	USD
CY2010	us-gaap	Capital Leases Income Statement Interest Expense CapitalLeasesIncomeStatementInterestExpense	2000000	USD
CY2011Q4	us-gaap	Capitalization Longterm Debt And Equity CapitalizationLongtermDebtAndEquity	29015000000	USD
CY2010Q4	us-gaap	Capitalization Longterm Debt And Equity CapitalizationLongtermDebtAndEquity	21531000000	USD
CY2011Q4	us-gaap	Cash Cash	49000000	USD
CY2010	us-gaap	Cash Acquired From Acquisition CashAcquiredFromAcquisition	0	USD
CY2011	us-gaap	Cash Acquired From Acquisition CashAcquiredFromAcquisition	590000000	USD
CY2010Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1019000000	USD
CY2011Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	202000000	USD
CY2009Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	874000000	USD
CY2008Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	545000000	USD
CY2011	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-817000000	USD
CY2009	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	329000000	USD
CY2010	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	145000000	USD
CY2010Q4	us-gaap	Cash Flow Hedge Derivative Instrument Assets At Fair Value CashFlowHedgeDerivativeInstrumentAssetsAtFairValue	104000000	USD
CY2010Q4	us-gaap	Cash Flow Hedge Derivative Instrument Liabilities At Fair Value CashFlowHedgeDerivativeInstrumentLiabilitiesAtFairValue	101000000	USD
CY2010Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2011Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2011Q2	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.55
CY2011Q1	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.55
CY2010	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	616000000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax	25000000	USD
CY2011Q3	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.55
CY2010Q3	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.55
CY2010Q2	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.55
CY2011Q4	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.55
CY2010Q4	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.55
CY2011	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	2.20
CY2010	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	2.20
CY2010Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.10
CY2011Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.10
CY2010Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	375000000	shares
CY2011Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	490000000	shares
CY2010Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	304835407	shares
CY2011Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	418216437	shares
CY2010Q4	us-gaap	Common Stock Value Outstanding CommonStockValueOutstanding	31000000	USD
CY2011Q4	us-gaap	Common Stock Value Outstanding CommonStockValueOutstanding	42000000	USD
CY2011	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	886000000	USD
CY2009	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	996000000	USD
CY2010	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	640000000	USD
CY2010	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-24000000	USD
CY2011	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-16000000	USD
CY2009	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-16000000	USD
CY2011	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	870000000	USD
CY2009	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	980000000	USD
CY2011Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	2054000000	USD
CY2010Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	1517000000	USD
CY2011	us-gaap	Cost Of Purchased Power CostOfPurchasedPower	4986000000	USD
CY2010	us-gaap	Cost Of Purchased Power CostOfPurchasedPower	4624000000	USD
CY2009	us-gaap	Cost Of Purchased Power CostOfPurchasedPower	4730000000	USD
CY2009	us-gaap	Costs And Expenses CostsAndExpenses	11290000000	USD
CY2011	us-gaap	Costs And Expenses CostsAndExpenses	14560000000	USD
CY2010	us-gaap	Costs And Expenses CostsAndExpenses	11596000000	USD
CY2011Q4	us-gaap	Debt Instrument Sinking Fund Amount DebtInstrumentSinkingFundAmount	6000000	USD
CY2011Q4	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	-64000000	USD
CY2010Q4	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	-83000000	USD
CY2010Q4	us-gaap	Decommissioning Fund Investments DecommissioningFundInvestments	1973000000	USD
CY2011Q4	us-gaap	Decommissioning Fund Investments DecommissioningFundInvestments	2112000000	USD
CY2011Q4	us-gaap	Deferred Compensation Arrangement With Individual Shares Authorized For Issuance DeferredCompensationArrangementWithIndividualSharesAuthorizedForIssuance	1700000	shares
CY2010	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	450000000	USD
CY2011	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	798000000	USD
CY2009	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	323000000	USD
CY2011	us-gaap	Deferred Purchased Power Costs DeferredPurchasedPowerCosts	-278000000	USD
CY2009	us-gaap	Deferred Purchased Power Costs DeferredPurchasedPowerCosts	-338000000	USD
CY2010	us-gaap	Deferred Purchased Power Costs DeferredPurchasedPowerCosts	-254000000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	344000000	USD
CY2009	us-gaap	Depreciation Nonproduction DepreciationNonproduction	757000000	USD
CY2010	us-gaap	Derivative Instruments Gain Loss Recognized In Other Comprehensive Income Effective Portion Net DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet	23000000	USD
CY2011	us-gaap	Depreciation Nonproduction DepreciationNonproduction	1121000000	USD
CY2011Q4	us-gaap	Derivative Asset Fair Value Net DerivativeAssetFairValueNet	17000000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	5670000000	USD
CY2010Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	3160000000	USD
CY2011	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Decrease On Accumulated Postretirement Benefit Obligation DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnAccumulatedPostretirementBenefitObligation	-17000000	USD
CY2011	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Decrease On Service And Interest Cost Components DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnServiceAndInterestCostComponents	-2000000	USD
CY2011	us-gaap	Electric Utility Revenue ElectricUtilityRevenue	16258000000	USD
CY2009	us-gaap	Electric Utility Revenue ElectricUtilityRevenue	12973000000	USD
CY2011	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Increase On Accumulated Postretirement Benefit Obligation DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnAccumulatedPostretirementBenefitObligation	20000000	USD
CY2011	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Increase On Service And Interest Cost Components DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnServiceAndInterestCostComponents	2000000	USD
CY2010	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets Period Increase Decrease DefinedBenefitPlanFairValueOfPlanAssetsPeriodIncreaseDecrease	-190000000	USD
CY2011	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets Period Increase Decrease DefinedBenefitPlanFairValueOfPlanAssetsPeriodIncreaseDecrease	-507000000	USD
CY2009	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets Period Increase Decrease DefinedBenefitPlanFairValueOfPlanAssetsPeriodIncreaseDecrease	-321000000	USD
CY2011	us-gaap	Defined Benefit Plan Target Allocation Percentage Of Assets Debt Securities DefinedBenefitPlanTargetAllocationPercentageOfAssetsDebtSecurities	0.50
CY2010	us-gaap	Defined Benefit Plan Target Allocation Percentage Of Assets Debt Securities DefinedBenefitPlanTargetAllocationPercentageOfAssetsDebtSecurities	0.50
CY2011	us-gaap	Defined Benefit Plan Target Allocation Percentage Of Assets Equity Securities DefinedBenefitPlanTargetAllocationPercentageOfAssetsEquitySecurities	0.23
CY2010	us-gaap	Defined Benefit Plan Target Allocation Percentage Of Assets Equity Securities DefinedBenefitPlanTargetAllocationPercentageOfAssetsEquitySecurities	0.21
CY2011	us-gaap	Defined Benefit Plan Target Allocation Percentage Of Assets Other DefinedBenefitPlanTargetAllocationPercentageOfAssetsOther	0.02
CY2010	us-gaap	Defined Benefit Plan Target Allocation Percentage Of Assets Other DefinedBenefitPlanTargetAllocationPercentageOfAssetsOther	0.02
CY2010	us-gaap	Defined Benefit Plan Target Allocation Percentage Of Assets Real Estate DefinedBenefitPlanTargetAllocationPercentageOfAssetsRealEstate	0.06
CY2011	us-gaap	Defined Benefit Plan Target Allocation Percentage Of Assets Real Estate DefinedBenefitPlanTargetAllocationPercentageOfAssetsRealEstate	0.06
CY2010	us-gaap	Defined Benefit Plan Ultimate Health Care Cost Trend Rate DefinedBenefitPlanUltimateHealthCareCostTrendRate	0.05
CY2011	us-gaap	Defined Benefit Plan Ultimate Health Care Cost Trend Rate DefinedBenefitPlanUltimateHealthCareCostTrendRate	0.05
CY2009	us-gaap	Depreciation And Amortization DepreciationAndAmortization	1776000000	USD
CY2011	us-gaap	Depreciation And Amortization DepreciationAndAmortization	1450000000	USD
CY2010	us-gaap	Depreciation And Amortization DepreciationAndAmortization	1490000000	USD
CY2010	us-gaap	Depreciation Nonproduction DepreciationNonproduction	768000000	USD
CY2010Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	182000000	USD
CY2011Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	235000000	USD
CY2011Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	321000000	USD
CY2010Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	268000000	USD
CY2011Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	619000000	USD
CY2010Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	714000000	USD
CY2011	us-gaap	Derivative Instruments Gain Loss Recognized In Other Comprehensive Income Effective Portion Net DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet	12000000	USD
CY2010Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	266000000	USD
CY2011Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	218000000	USD
CY2009	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.87
CY2010	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.44
CY2011	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.22
CY2011	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.21
CY2010	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.42
CY2009	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.85
CY2011	us-gaap	Electric Domestic Regulated Revenue ElectricDomesticRegulatedRevenue	10396000000	USD
CY2009	us-gaap	Electric Domestic Regulated Revenue ElectricDomesticRegulatedRevenue	11139000000	USD
CY2010	us-gaap	Electric Domestic Regulated Revenue ElectricDomesticRegulatedRevenue	9815000000	USD
CY2010	us-gaap	Electric Utility Revenue ElectricUtilityRevenue	13339000000	USD
CY2010	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-5000000	USD
CY2011	us-gaap	Electric Worldwide Unregulated Revenue ElectricWorldwideUnregulatedRevenue	5862000000	USD
CY2009	us-gaap	Electric Worldwide Unregulated Revenue ElectricWorldwideUnregulatedRevenue	1834000000	USD
CY2011	us-gaap	Future Amortization Expense Year Three FutureAmortizationExpenseYearThree	77000000	USD
CY2010	us-gaap	Electric Worldwide Unregulated Revenue ElectricWorldwideUnregulatedRevenue	3524000000	USD
CY2011	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	14000000	USD
CY2011	us-gaap	Future Amortization Expense Year Two FutureAmortizationExpenseYearTwo	90000000	USD
CY2009	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	9000000	USD
CY2010	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	11000000	USD
CY2011	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	59000000	USD
CY2010	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	-100000000	USD
CY2009	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	19000000	USD
CY2011	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2010Q4	us-gaap	Goodwill Goodwill	5575000000	USD
CY2011	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	-101000000	USD
CY2009	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	2000000	shares
CY2010	us-gaap	Excise Taxes Collected ExciseTaxesCollected	428000000	USD
CY2011	us-gaap	Excise Taxes Collected ExciseTaxesCollected	486000000	USD
CY2011Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	171000000	USD
CY2011	us-gaap	Finite Lived Intangible Assets Amortization Expense FiniteLivedIntangibleAssetsAmortizationExpense	144000000	USD
CY2011Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	974000000	USD
CY2011Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	803000000	USD
CY2010	us-gaap	Fuel Costs FuelCosts	1432000000	USD
CY2009	us-gaap	Fuel Costs FuelCosts	1153000000	USD
CY2011	us-gaap	Fuel Costs FuelCosts	2317000000	USD
CY2011	us-gaap	Future Amortization Expense After Year Five FutureAmortizationExpenseAfterYearFive	288000000	USD
CY2011	us-gaap	Future Amortization Expense Year Five FutureAmortizationExpenseYearFive	69000000	USD
CY2011	us-gaap	Future Amortization Expense Year Four FutureAmortizationExpenseYearFour	69000000	USD
CY2011	us-gaap	Future Amortization Expense Year One FutureAmortizationExpenseYearOne	126000000	USD
CY2010	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	55000000	USD
CY2009	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	176000000	USD
CY2011	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	545000000	USD
CY2010	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	2000000	USD
CY2009	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	27000000	USD
CY2011	us-gaap	Gain Loss On Sale Of Stock In Subsidiary Or Equity Method Investee GainLossOnSaleOfStockInSubsidiaryOrEquityMethodInvestee	569000000	USD
CY2010	us-gaap	Gain Loss On Sale Of Stock In Subsidiary Or Equity Method Investee GainLossOnSaleOfStockInSubsidiaryOrEquityMethodInvestee	0	USD
CY2009	us-gaap	Gain Loss On Sale Of Stock In Subsidiary Or Equity Method Investee GainLossOnSaleOfStockInSubsidiaryOrEquityMethodInvestee	0	USD
CY2009	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-146000000	USD
CY2011Q4	us-gaap	Goodwill Goodwill	6441000000	USD
CY2009Q4	us-gaap	Goodwill Goodwill	5575000000	USD
CY2011	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	866000000	USD
CY2011Q4	us-gaap	Guarantee Obligations Current Carrying Value GuaranteeObligationsCurrentCarryingValue	3700000000	USD
CY2011Q4	us-gaap	Guarantee Obligations Maximum Exposure GuaranteeObligationsMaximumExposure	636000000	USD
CY2010Q4	us-gaap	Held To Maturity Securities Noncurrent HeldToMaturitySecuritiesNoncurrent	476000000	USD
CY2011Q4	us-gaap	Held To Maturity Securities Noncurrent HeldToMaturitySecuritiesNoncurrent	402000000	USD
CY2011	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	2000000	shares
CY2010	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	1000000	shares
CY2011	us-gaap	Interest And Debt Expense InterestAndDebtExpense	1008000000	USD
CY2009	us-gaap	Interest Paid Net InterestPaidNet	718000000	USD
CY2010	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	14000000	USD
CY2010	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	462000000	USD
CY2009	us-gaap	Interest And Debt Expense InterestAndDebtExpense	978000000	USD
CY2010	us-gaap	Interest And Debt Expense InterestAndDebtExpense	845000000	USD
CY2009	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	24000000	USD
CY2009	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	173000000	USD
CY2011	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	8000000	USD
CY2011	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	19000000	USD
CY2011	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-358000000	USD
CY2010	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-42000000	USD
CY2011	us-gaap	Interest Paid Net InterestPaidNet	935000000	USD
CY2010	us-gaap	Interest Paid Net InterestPaidNet	662000000	USD
CY2010	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	177000000	USD
CY2011	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	-147000000	USD
CY2009	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	-75000000	USD
CY2010	us-gaap	Increase Decrease In Accounts Payable Trade IncreaseDecreaseInAccountsPayableTrade	43000000	USD
CY2011	us-gaap	Increase Decrease In Accounts Payable Trade IncreaseDecreaseInAccountsPayableTrade	35000000	USD
CY2009	us-gaap	Increase Decrease In Accounts Payable Trade IncreaseDecreaseInAccountsPayableTrade	50000000	USD
CY2009	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-103000000	USD
CY2011	us-gaap	Impairment Of Investments ImpairmentOfInvestments	19000000	USD
CY2009	us-gaap	Impairment Of Investments ImpairmentOfInvestments	62000000	USD
CY2010	us-gaap	Impairment Of Investments ImpairmentOfInvestments	33000000	USD
CY2010	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1180000000	USD
CY2011	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1443000000	USD
CY2009	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1040000000	USD
CY2009	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	184000000	USD
CY2011	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	574000000	USD
CY2011	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	91000000	USD
CY2010	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	57000000	USD
CY2009	us-gaap	Increase Decrease In Deposits Outstanding IncreaseDecreaseInDepositsOutstanding	-30000000	USD
CY2010	us-gaap	Increase Decrease In Deposits Outstanding IncreaseDecreaseInDepositsOutstanding	26000000	USD
CY2011	us-gaap	Increase Decrease In Deposits Outstanding IncreaseDecreaseInDepositsOutstanding	79000000	USD
CY2009	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	-124000000	USD
CY2010	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	-65000000	USD
CY2011	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	-82000000	USD
CY2011	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-12000000	USD
CY2010	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	7000000	USD
CY2009	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	67000000	USD
CY2010	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-2000000	USD
CY2009	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	11000000	USD
CY2011	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-14000000	USD
CY2011	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	57000000	USD
CY2010	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-45000000	USD
CY2009	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-29000000	USD
CY2011Q4	us-gaap	Longterm Pollution Control Bond Current And Noncurrent LongtermPollutionControlBondCurrentAndNoncurrent	513000000	USD
CY2011Q4	us-gaap	Longterm Transition Bond Current And Noncurrent LongtermTransitionBondCurrentAndNoncurrent	287000000	USD
CY2010Q4	us-gaap	Minority Interest MinorityInterest	-32000000	USD
CY2009	us-gaap	Interest Revenue Expense Net InterestRevenueExpenseNet	-978000000	USD
CY2011	us-gaap	Interest Revenue Expense Net InterestRevenueExpenseNet	-1008000000	USD
CY2010	us-gaap	Interest Revenue Expense Net InterestRevenueExpenseNet	-845000000	USD
CY2011Q4	us-gaap	Inventory Net InventoryNet	811000000	USD
CY2010	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	7000000	USD
CY2011Q4	us-gaap	Minority Interest MinorityInterest	19000000	USD
CY2009	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	2229000000	USD
CY2010Q4	us-gaap	Inventory Net InventoryNet	638000000	USD
CY2009	us-gaap	Investment Income Interest And Dividend InvestmentIncomeInterestAndDividend	204000000	USD
CY2011	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-2924000000	USD
CY2009	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	49000000	USD
CY2010	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	3172000000	USD
CY2010	us-gaap	Investment Income Interest And Dividend InvestmentIncomeInterestAndDividend	117000000	USD
CY2010	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-983000000	USD
CY2011	us-gaap	Investment Income Interest And Dividend InvestmentIncomeInterestAndDividend	114000000	USD
CY2011	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	4207000000	USD
CY2010	us-gaap	Proceeds From Sale Of Other Productive Assets ProceedsFromSaleOfOtherProductiveAssets	117000000	USD
CY2011Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	258000000	USD
CY2011Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	315000000	USD
CY2011Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	283000000	USD
CY2009	us-gaap	Proceeds From Sale Of Other Productive Assets ProceedsFromSaleOfOtherProductiveAssets	21000000	USD
CY2010Q4	us-gaap	Long Term Investments LongTermInvestments	3002000000	USD
CY2011Q4	us-gaap	Longterm Pollution Control Bond Current LongtermPollutionControlBondCurrent	632000000	USD
CY2011Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	2030000000	USD
CY2011Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	240000000	USD
CY2009	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	236000000	USD
CY2011	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	226000000	USD
CY2011Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	47326000000	USD
CY2010Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	35531000000	USD
CY2011Q4	us-gaap	Liabilities Current LiabilitiesCurrent	4855000000	USD
CY2010Q4	us-gaap	Liabilities Current LiabilitiesCurrent	4704000000	USD
CY2011Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	13456000000	USD
CY2010Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	9296000000	USD
CY2011Q4	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	5000000000	USD
CY2011Q4	us-gaap	Line Of Credit Facility Remaining Borrowing Capacity LineOfCreditFacilityRemainingBorrowingCapacity	4343000000	USD
CY2010Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	12579000000	USD
CY2011Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	15716000000	USD
CY2011Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	1621000000	USD
CY2010Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	1486000000	USD
CY2010Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	-1486000000	USD
CY2011Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	-1621000000	USD
CY2011Q4	us-gaap	Long Term Investments LongTermInvestments	3522000000	USD
CY2010	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1948000000	USD
CY2011	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-956000000	USD
CY2009	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2185000000	USD
CY2009	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	2465000000	USD
CY2011	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	3063000000	USD
CY2010	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	3076000000	USD
CY2011	us-gaap	Net Income Loss NetIncomeLoss	885000000	USD
CY2010	us-gaap	Net Income Loss NetIncomeLoss	742000000	USD
CY2009	us-gaap	Net Income Loss NetIncomeLoss	872000000	USD
CY2009	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-16000000	USD
CY2010	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-24000000	USD
CY2011	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-16000000	USD
CY2011	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-255000000	USD
CY2009	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-643000000	USD
CY2010	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-563000000	USD
CY2009	us-gaap	Operating Income Loss OperatingIncomeLoss	1683000000	USD
CY2010	us-gaap	Operating Income Loss OperatingIncomeLoss	1743000000	USD
CY2011Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	252000000	USD
CY2009	us-gaap	Other Comprehensive Income Loss Before Tax Period Increase Decrease OtherComprehensiveIncomeLossBeforeTaxPeriodIncreaseDecrease	252000000	USD
CY2011Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	1799000000	USD
CY2010	us-gaap	Other Amortization Of Deferred Charges OtherAmortizationOfDeferredCharges	168000000	USD
CY2009	us-gaap	Other Comprehensive Income Loss Net Of Tax Period Increase Decrease OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecrease	124000000	USD
CY2011Q4	us-gaap	Remaining Amounts Of Regulatory Assets For Which No Return On Investment During Recovery Period Is Provided RemainingAmountsOfRegulatoryAssetsForWhichNoReturnOnInvestmentDuringRecoveryPeriodIsProvided	413000000	USD
CY2009	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	2610000000	USD
CY2011	us-gaap	Operating Income Loss OperatingIncomeLoss	1698000000	USD
CY2011Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	3147000000	USD
CY2011	us-gaap	Other Comprehensive Income Reclassification Of Defined Benefit Plans Net Gain Loss Recognized In Net Periodic Benefit Cost Before Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainLossRecognizedInNetPeriodicBenefitCostBeforeTax	-169000000	USD
CY2011Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	2072000000	USD
CY2009	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Before Tax Period Increase Decrease OtherComprehensiveIncomeDerivativesQualifyingAsHedgesBeforeTaxPeriodIncreaseDecrease	51000000	USD
CY2010	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Before Tax Period Increase Decrease OtherComprehensiveIncomeDerivativesQualifyingAsHedgesBeforeTaxPeriodIncreaseDecrease	36000000	USD
CY2010	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-54000000	USD
CY2011Q4	us-gaap	Other Long Term Investments OtherLongTermInvestments	1008000000	USD
CY2011	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-39000000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Before Tax Period Increase Decrease OtherComprehensiveIncomeLossBeforeTaxPeriodIncreaseDecrease	-48000000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Before Tax Period Increase Decrease OtherComprehensiveIncomeLossBeforeTaxPeriodIncreaseDecrease	-176000000	USD
CY2011	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	7000000	USD
CY2010	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	3000000	USD
CY2009	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-31000000	USD
CY2009	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	2551000000	USD
CY2011	us-gaap	Other Amortization Of Deferred Charges OtherAmortizationOfDeferredCharges	201000000	USD
CY2009	us-gaap	Other Amortization Of Deferred Charges OtherAmortizationOfDeferredCharges	128000000	USD
CY2010Q4	us-gaap	Other Assets Current OtherAssetsCurrent	92000000	USD
CY2011Q4	us-gaap	Other Assets Current OtherAssetsCurrent	122000000	USD
CY2010Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	916000000	USD
CY2011Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	1641000000	USD
CY2010	us-gaap	Other Comprehensive Income Available For Sale Securities Adjustment Before Tax Period Increase Decrease OtherComprehensiveIncomeAvailableForSaleSecuritiesAdjustmentBeforeTaxPeriodIncreaseDecrease	8000000	USD
CY2009	us-gaap	Other Comprehensive Income Available For Sale Securities Adjustment Before Tax Period Increase Decrease OtherComprehensiveIncomeAvailableForSaleSecuritiesAdjustmentBeforeTaxPeriodIncreaseDecrease	-74000000	USD
CY2011	us-gaap	Other Comprehensive Income Available For Sale Securities Adjustment Before Tax Period Increase Decrease OtherComprehensiveIncomeAvailableForSaleSecuritiesAdjustmentBeforeTaxPeriodIncreaseDecrease	19000000	USD
CY2009	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Before Tax Period Increase Decrease OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPeriodIncreaseDecrease	275000000	USD
CY2011	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Before Tax Period Increase Decrease OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPeriodIncreaseDecrease	-90000000	USD
CY2010	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Before Tax Period Increase Decrease OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPeriodIncreaseDecrease	-220000000	USD
CY2010	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Period Increase Decrease OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecrease	472000000	USD
CY2011	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Period Increase Decrease OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecrease	446000000	USD
CY2010	us-gaap	Other Comprehensive Income Defined Benefit Plans Tax OtherComprehensiveIncomeDefinedBenefitPlansTax	-91000000	USD
CY2009	us-gaap	Other Comprehensive Income Defined Benefit Plans Tax OtherComprehensiveIncomeDefinedBenefitPlansTax	135000000	USD
CY2011	us-gaap	Other Comprehensive Income Defined Benefit Plans Tax OtherComprehensiveIncomeDefinedBenefitPlansTax	-64000000	USD
CY2011	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Before Tax Period Increase Decrease OtherComprehensiveIncomeDerivativesQualifyingAsHedgesBeforeTaxPeriodIncreaseDecrease	23000000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Net Of Tax Period Increase Decrease OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecrease	1000000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Net Of Tax Period Increase Decrease OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecrease	-102000000	USD
CY2009	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	128000000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-49000000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-74000000	USD
CY2009	us-gaap	Other Comprehensive Income Reclassification Adjustment For Sale Of Securities Included In Net Income Before Tax OtherComprehensiveIncomeReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeBeforeTax	157000000	USD
CY2011	us-gaap	Other Comprehensive Income Reclassification Adjustment For Sale Of Securities Included In Net Income Before Tax OtherComprehensiveIncomeReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeBeforeTax	157000000	USD
CY2010	us-gaap	Other Comprehensive Income Reclassification Adjustment For Sale Of Securities Included In Net Income Before Tax OtherComprehensiveIncomeReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeBeforeTax	54000000	USD
CY2010	us-gaap	Other Comprehensive Income Reclassification Adjustment On Derivatives Included In Net Income Before Tax OtherComprehensiveIncomeReclassificationAdjustmentOnDerivativesIncludedInNetIncomeBeforeTax	-35000000	USD
CY2009	us-gaap	Other Comprehensive Income Reclassification Adjustment On Derivatives Included In Net Income Before Tax OtherComprehensiveIncomeReclassificationAdjustmentOnDerivativesIncludedInNetIncomeBeforeTax	-67000000	USD
CY2011	us-gaap	Other Comprehensive Income Reclassification Adjustment On Derivatives Included In Net Income Before Tax OtherComprehensiveIncomeReclassificationAdjustmentOnDerivativesIncludedInNetIncomeBeforeTax	-26000000	USD
CY2009	us-gaap	Other Comprehensive Income Reclassification Of Defined Benefit Plans Net Gain Loss Recognized In Net Periodic Benefit Cost Before Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainLossRecognizedInNetPeriodicBenefitCostBeforeTax	-68000000	USD
CY2010	us-gaap	Other Comprehensive Income Reclassification Of Defined Benefit Plans Net Gain Loss Recognized In Net Periodic Benefit Cost Before Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainLossRecognizedInNetPeriodicBenefitCostBeforeTax	-87000000	USD
CY2011	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	3909000000	USD
CY2010	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	2696000000	USD
CY2011	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	1909000000	USD
CY2010	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	1015000000	USD
CY2011Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	900000000	USD
CY2010Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	733000000	USD
CY2009	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	2203000000	USD
CY2010	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	1963000000	USD
CY2010Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	1436000000	USD
CY2010	us-gaap	Profit Loss ProfitLoss	718000000	USD
CY2011	us-gaap	Profit Loss ProfitLoss	869000000	USD
CY2009	us-gaap	Profit Loss ProfitLoss	856000000	USD
CY2011Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	40122000000	USD
CY2010Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	30276000000	USD
CY2010Q4	us-gaap	Other Long Term Investments OtherLongTermInvestments	553000000	USD
CY2011Q4	us-gaap	Other Receivables OtherReceivables	269000000	USD
CY2010Q4	us-gaap	Other Receivables OtherReceivables	176000000	USD
CY2011	us-gaap	Payments For Proceeds From Investments PaymentsForProceedsFromInvestments	-60000000	USD
CY2010	us-gaap	Payments For Proceeds From Investments PaymentsForProceedsFromInvestments	-66000000	USD
CY2009	us-gaap	Payments For Proceeds From Investments PaymentsForProceedsFromInvestments	-60000000	USD
CY2011	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-51000000	USD
CY2009	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-55000000	USD
CY2010	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-27000000	USD
CY2010	us-gaap	Payments For Proceeds From Removal Costs PaymentsForProceedsFromRemovalCosts	35000000	USD
CY2009	us-gaap	Payments For Proceeds From Removal Costs PaymentsForProceedsFromRemovalCosts	41000000	USD
CY2011	us-gaap	Payments For Proceeds From Removal Costs PaymentsForProceedsFromRemovalCosts	114000000	USD
CY2011	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	881000000	USD
CY2009	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	670000000	USD
CY2010	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	670000000	USD
CY2009	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	2306000000	USD
CY2010	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	3219000000	USD
CY2011	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	4309000000	USD
CY2009	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	0	USD
CY2010	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	113000000	USD
CY2011	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	3000000	USD
CY2011	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	2278000000	USD
CY2011Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	2823000000	USD
CY2010Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	1868000000	USD
CY2010	us-gaap	Pension Contributions PensionContributions	0	USD
CY2011	us-gaap	Pension Contributions PensionContributions	372000000	USD
CY2009	us-gaap	Pension Contributions PensionContributions	500000000	USD
CY2011Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2010Q4	us-gaap	Prepaid Taxes PrepaidTaxes	199000000	USD
CY2011Q4	us-gaap	Prepaid Taxes PrepaidTaxes	191000000	USD
CY2009	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	4632000000	USD
CY2010	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	1099000000	USD
CY2011	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	604000000	USD
CY2009	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-57000000	USD
CY2010	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-19000000	USD
CY2011	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-38000000	USD
CY2011	us-gaap	Repayments Of Short Term Debt RepaymentsOfShortTermDebt	700000000	USD
CY2010Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	20510000000	USD
CY2011Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	30337000000	USD
CY2009	us-gaap	Repayments Of Short Term Debt RepaymentsOfShortTermDebt	1246000000	USD
CY2011Q4	fe	Deferred Compensation Arrangement With Individual Number Of Shares Available For Grant DeferredCompensationArrangementWithIndividualNumberOfSharesAvailableForGrant	1075080	shares
CY2010	us-gaap	Repayments Of Short Term Debt RepaymentsOfShortTermDebt	378000000	USD
CY2011	us-gaap	Proceeds From Sale Of Other Productive Assets ProceedsFromSaleOfOtherProductiveAssets	840000000	USD
CY2010	fe	Deferred Rents And Lease Market Valuation Liability DeferredRentsAndLeaseMarketValuationLiability	54000000	USD
CY2009	fe	Deferred Rents And Lease Market Valuation Liability DeferredRentsAndLeaseMarketValuationLiability	52000000	USD
CY2011Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	3047000000	USD
CY2010Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	3084000000	USD
CY2011	fe	Deferred Rents And Lease Market Valuation Liability DeferredRentsAndLeaseMarketValuationLiability	49000000	USD
CY2011	us-gaap	Revenues From External Customers RevenuesFromExternalCustomers	16191000000	USD
CY2010	us-gaap	Revenues From External Customers RevenuesFromExternalCustomers	13265000000	USD
CY2010Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	1830000000	USD
CY2009	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	131000000	USD
CY2011	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	70000000	USD
CY2010	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	165000000	USD
CY2009	us-gaap	Revenues From External Customers RevenuesFromExternalCustomers	12956000000	USD
CY2011	us-gaap	Revenues From Transactions With Other Operating Segments Of Same Entity RevenuesFromTransactionsWithOtherOperatingSegmentsOfSameEntity	67000000	USD
CY2009	us-gaap	Revenues From Transactions With Other Operating Segments Of Same Entity RevenuesFromTransactionsWithOtherOperatingSegmentsOfSameEntity	17000000	USD
CY2010	us-gaap	Revenues From Transactions With Other Operating Segments Of Same Entity RevenuesFromTransactionsWithOtherOperatingSegmentsOfSameEntity	74000000	USD
CY2010Q4	us-gaap	Sale Leaseback Transaction Deferred Gain Net SaleLeasebackTransactionDeferredGainNet	959000000	USD
CY2011Q4	us-gaap	Sale Leaseback Transaction Deferred Gain Net SaleLeasebackTransactionDeferredGainNet	925000000	USD
CY2011	us-gaap	Sales Revenue From Energy Commodities And Services SalesRevenueFromEnergyCommoditiesAndServices	15117000000	USD
CY2009	us-gaap	Sales Revenue From Energy Commodities And Services SalesRevenueFromEnergyCommoditiesAndServices	12032000000	USD
CY2010	us-gaap	Sales Revenue From Energy Commodities And Services SalesRevenueFromEnergyCommoditiesAndServices	12523000000	USD
CY2010Q4	us-gaap	Secured Debt SecuredDebt	2784000000	USD
CY2011Q4	fe	Deferred Tax Assets Operating Loss Carryforwards Net DeferredTaxAssetsOperatingLossCarryforwardsNet	267000000	USD
CY2009	us-gaap	Share Based Compensation ShareBasedCompensation	20000000	USD
CY2009Q4	fe	Derivatives Not Designated As Hedging Instruments At Fair Value Net DerivativesNotDesignatedAsHedgingInstrumentsAtFairValueNet	-425000000	USD
CY2011Q4	fe	Derivatives Not Designated As Hedging Instruments At Fair Value Net DerivativesNotDesignatedAsHedgingInstrumentsAtFairValueNet	-301000000	USD
CY2011Q4	fe	Electricity Produced By Retired Coal Fired Power Plants Percent ElectricityProducedByRetiredCoalFiredPowerPlantsPercent	0.10
CY2011Q4	fe	Elevation Of Sub Surface Hairline Cracks Feet ElevationOfSubSurfaceHairlineCracksFeet	780
CY2011	fe	Estimated Clean Up Cost EstimatedCleanUpCost	59000000	USD
CY2011Q1	fe	Exchange Ratio To Calculate Number Of Shares To Be Received By Acquiree Company On Merger ExchangeRatioToCalculateNumberOfSharesToBeReceivedByAcquireeCompanyOnMerger	0.667
CY2011	us-gaap	Share Based Compensation ShareBasedCompensation	-10000000	USD
CY2010	us-gaap	Share Based Compensation ShareBasedCompensation	-1000000	USD
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod	two months to ten years
CY2011Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	29100000	shares
CY2011Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	5600000	shares
CY2011Q4	us-gaap	Schedule Of Insured Financial Obligations With Credit Deterioration Insured Contractual Payments Outstanding ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationInsuredContractualPaymentsOutstanding	636000000	USD
CY2011Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	31.48
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	-127197	shares
CY2011Q4	fe	Expected Adverse Change In Quoted Market Prices Derivative Instruments ExpectedAdverseChangeInQuotedMarketPricesDerivativeInstruments	-0.10
CY2011	fe	Expected Number Of Nuclear Power Plant Licensed To Operate ExpectedNumberOfNuclearPowerPlantLicensedToOperate	104	NuclearPowerPlants
CY2011Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	70.19
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod	662122	shares
CY2011	fe	Expenses Related To Merger Settlements Approved By Regulatory Agencies ExpensesRelatedToMergerSettlementsApprovedByRegulatoryAgencies	36000000	USD
CY2011Q4	us-gaap	Secured Debt SecuredDebt	2775000000	USD
CY2011Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	37.75
CY2010Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	2889066	shares
CY2011Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	4255985	shares
CY2011Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	38.17
CY2010Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	35.18
CY2011Q4	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Outstanding Options ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions	4255985	shares
CY2011Q4	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding Options Weighted Average Exercise Price Beginning Balance1 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1	38.17
CY2011Q4	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding Options Weighted Average Remaining Contractual Term1 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm1	3.25	years
CY2011Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	0	USD
CY2010Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	700000000	USD
CY2011	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	-973817	shares
CY2010	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	0	USD
CY2009	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	0	USD
CY2011	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	4354000000	USD
CY2010Q4	us-gaap	Stockholders Equity StockholdersEquity	8984000000	USD
CY2011Q4	us-gaap	Stockholders Equity StockholdersEquity	13280000000	USD
CY2010Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	8952000000	USD
CY2011Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	13299000000	USD
CY2011	fe	Extension Of Comment Period ExtensionOfCommentPeriod	P30D
CY2011	fe	Other Comprehensive Income Reclassification Adjustment Total Before Tax OtherComprehensiveIncomeReclassificationAdjustmentTotalBeforeTax	300000000	USD
CY2011	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	0	USD
CY2009	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	0	USD
CY2011Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	44000000	USD
CY2009	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromCurrentPeriodTaxPositions	100000000	USD
CY2010	fe	Other Comprehensive Income Reclassification Adjustment Total Before Tax OtherComprehensiveIncomeReclassificationAdjustmentTotalBeforeTax	106000000	USD
CY2010	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromCurrentPeriodTaxPositions	78000000	USD
CY2009Q3	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	34000000	USD
CY2011	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Expense UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense	6000000	USD
CY2011	fe	Period In Which Lses May Request Direct Allocation Of Ftrs PeriodInWhichLsesMayRequestDirectAllocationOfFtrs	P2Y
CY2011Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	10000000	USD
CY2010	us-gaap	Tax Adjustments Settlements And Unusual Provisions TaxAdjustmentsSettlementsAndUnusualProvisions	21000000	USD
CY2009	us-gaap	Tax Adjustments Settlements And Unusual Provisions TaxAdjustmentsSettlementsAndUnusualProvisions	161000000	USD
CY2010	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	776000000	USD
CY2009	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	753000000	USD
CY2011	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	978000000	USD
CY2011	us-gaap	Unrealized Gain Loss On Commodity Contracts UnrealizedGainLossOnCommodityContracts	27000000	USD
CY2010	us-gaap	Unrealized Gain Loss On Commodity Contracts UnrealizedGainLossOnCommodityContracts	81000000	USD
CY2009	us-gaap	Unrealized Gain Loss On Commodity Contracts UnrealizedGainLossOnCommodityContracts	-229000000	USD
CY2010	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-129000000	USD
CY2011Q4	us-gaap	Unsecured Debt UnsecuredDebt	11743000000	USD
CY2010Q4	us-gaap	Unsecured Debt UnsecuredDebt	10121000000	USD
CY2011	us-gaap	Utilities Operating Expense Impairments UtilitiesOperatingExpenseImpairments	413000000	USD
CY2010	us-gaap	Utilities Operating Expense Impairments UtilitiesOperatingExpenseImpairments	388000000	USD
CY2009	us-gaap	Utilities Operating Expense Impairments UtilitiesOperatingExpenseImpairments	6000000	USD
CY2011	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	-27000000	USD
CY2011	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	401000000	shares
CY2009	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	306000000	shares
CY2010	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	305000000	shares
CY2009	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	304000000	shares
CY2011	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	399000000	shares
CY2010	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	304000000	shares
CY2011Q1	fe	Acquisition Equity Interests Issued Or Issuable Price Per Share AcquisitionEquityInterestsIssuedOrIssuablePricePerShare	38.16
CY2009	fe	Acquisition Of Supply Requirements AcquisitionOfSupplyRequirements	-93000000	USD
CY2011	fe	Acquisition Of Supply Requirements AcquisitionOfSupplyRequirements	0	USD
CY2010	fe	Acquisition Of Supply Requirements AcquisitionOfSupplyRequirements	0	USD
CY2011Q2	fe	Additional Expenses Recognized For Clean Up Cost AdditionalExpensesRecognizedForCleanUpCost	29000000	USD
CY2010	fe	Adjustment That Increased Income Tax Expense AdjustmentThatIncreasedIncomeTaxExpense	8000000	USD
CY2011	fe	Portion Of Insurance Coverage By Industry Retrospective Rating Plan PortionOfInsuranceCoverageByIndustryRetrospectiveRatingPlan	12200000000	USD
CY2011	fe	Portion Of Insurance Coverage Of Private Insurer Included In Single Nuclear Incident Liability PortionOfInsuranceCoverageOfPrivateInsurerIncludedInSingleNuclearIncidentLiability	375000000	USD
CY2010Q4	fe	Power Purchase Contract Liability PowerPurchaseContractLiability	466000000	USD
CY2011Q1	fe	Business Acquisition Equity Interest Issued Number Of Shares Issued BusinessAcquisitionEquityInterestIssuedNumberOfSharesIssued	113000000	shares
CY2011Q4	fe	Power Purchase Contract Liability PowerPurchaseContractLiability	469000000	USD
CY2011Q1	fe	Business Acquisition Number Of Acquiree Common Stock Exchanged BusinessAcquisitionNumberOfAcquireeCommonStockExchanged	170000000	shares
CY2011Q1	fe	Business Acquisition Purchase Price Allocation Investments BusinessAcquisitionPurchasePriceAllocationInvestments	138000000	USD
CY2011	fe	Basic Terms Of Operating Lease BasicTermsOfOperatingLease	33	years
CY2011Q4	fe	Preference Stock Shares Outstanding PreferenceStockSharesOutstanding	0	shares
CY2011	fe	Days In Federal Register DaysInFederalRegister	P60D
CY2011	fe	Decrease In Current Assets Due To Business Acquisition Purchase Price Allocation DecreaseInCurrentAssetsDueToBusinessAcquisitionPurchasePriceAllocation	16000000	USD
CY2011Q4	fe	Available Liquidity AvailableLiquidity	4392000000	USD
CY2009	fe	Capital Leases Income Statement Other Expense CapitalLeasesIncomeStatementOtherExpense	16000000	USD
CY2011	fe	Capital Leases Income Statement Other Expense CapitalLeasesIncomeStatementOtherExpense	46000000	USD
CY2010	fe	Capital Leases Income Statement Other Expense CapitalLeasesIncomeStatementOtherExpense	35000000	USD
CY2011Q4	fe	Cash Receivables Payables Deferred Taxes Accrued Income Balance Excluded From Available For Sale Securities CashReceivablesPayablesDeferredTaxesAccruedIncomeBalanceExcludedFromAvailableForSaleSecurities	164000000	USD
CY2010Q4	fe	Cash Receivables Payables Deferred Taxes Accrued Income Balance Excluded From Available For Sale Securities CashReceivablesPayablesDeferredTaxesAccruedIncomeBalanceExcludedFromAvailableForSaleSecurities	193000000	USD
CY2010	fe	Change To Company Earnings Resulting From Retiree Healthcare Liabilities And Related Tax Impact Already Reflected In Consolidated Financial Statements ChangeToCompanyEarningsResultingFromRetireeHealthcareLiabilitiesAndRelatedTaxImpactAlreadyReflectedInConsolidatedFinancialStatements	13000000	USD
CY2011	fe	Commitment Period By Developed Countries To Provide Funds Years CommitmentPeriodByDevelopedCountriesToProvideFundsYears	P3Y
CY2010	fe	Cost Included As Repair Deduction Due To Change In Accounting Method CostIncludedAsRepairDeductionDueToChangeInAccountingMethod	325000000	USD
CY2009Q2	fe	Cost Included As Repair Deduction Due To Change In Accounting Method CostIncludedAsRepairDeductionDueToChangeInAccountingMethod	281000000	USD
CY2011	fe	Coverage Of Decontamination Costs As Per Property Damage Insurance CoverageOfDecontaminationCostsAsPerPropertyDamageInsurance	2800000000	USD
CY2011	fe	Increase In Property Plant And Equipment Due To Business Acquisition Purchase Price Allocation IncreaseInPropertyPlantAndEquipmentDueToBusinessAcquisitionPurchasePriceAllocation	4000000	USD
CY2011Q4	fe	Insurance Coverage For Replacement Power Costs InsuranceCoverageForReplacementPowerCosts	1100000000	USD
CY2011Q4	fe	Investment In Variable Interest Entities InvestmentInVariableInterestEntities	0	USD
CY2011	fe	Investment Income From Trusts InvestmentIncomeFromTrusts	82000000	USD
CY2011	fe	Decrease In Goodwill Due To Business Acquisition Purchase Price Allocation DecreaseInGoodwillDueToBusinessAcquisitionPurchasePriceAllocation	86000000	USD
CY2011	fe	Decrease Net Income Due To Adverse Change In Commodity Prices DecreaseNetIncomeDueToAdverseChangeInCommodityPrices	13000000	USD
CY2009	fe	Investment Income From Trusts InvestmentIncomeFromTrusts	60000000	USD
CY2010	fe	Investment Income From Trusts InvestmentIncomeFromTrusts	79000000	USD
CY2011	fe	Retrospective Assessments Liabilities RetrospectiveAssessmentsLiabilities	66000000	USD
CY2011Q4	fe	Investments Excludes Receivables Payables Deferred Taxes And Accrued Income InvestmentsExcludesReceivablesPayablesDeferredTaxesAndAccruedIncome	-52000000	USD
CY2010Q4	fe	Investments Excludes Receivables Payables Deferred Taxes And Accrued Income InvestmentsExcludesReceivablesPayablesDeferredTaxesAndAccruedIncome	-7000000	USD
CY2010	fe	Defined Benefit Plan Target Allocation Percentage Of Assets Absolute Return Strategies DefinedBenefitPlanTargetAllocationPercentageOfAssetsAbsoluteReturnStrategies	0.21
CY2011	fe	Defined Benefit Plan Target Allocation Percentage Of Assets Absolute Return Strategies DefinedBenefitPlanTargetAllocationPercentageOfAssetsAbsoluteReturnStrategies	0.19
CY2010	fe	Defined Benefit Plan Target Allocation Percentage Of Assets Total DefinedBenefitPlanTargetAllocationPercentageOfAssetsTotal	1.00
CY2011	fe	Defined Benefit Plan Target Allocation Percentage Of Assets Total DefinedBenefitPlanTargetAllocationPercentageOfAssetsTotal	1.00
CY2010	fe	Derivative Instruments Not Designated As Hedging Instruments Additions Or Change In Value Of Existing Contracts DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAdditionsOrChangeInValueOfExistingContracts	181000000	USD
CY2011	fe	Derivative Instruments Not Designated As Hedging Instruments Additions Or Change In Value Of Existing Contracts DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAdditionsOrChangeInValueOfExistingContracts	207000000	USD
CY2010	fe	Derivative Instruments Not Designated As Hedging Instruments Settled Contracts DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsSettledContracts	271000000	USD
CY2011	fe	Derivative Instruments Not Designated As Hedging Instruments Settled Contracts DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsSettledContracts	241000000	USD
CY2010Q4	fe	Derivatives Not Designated As Hedging Instruments At Fair Value Net DerivativesNotDesignatedAsHedgingInstrumentsAtFairValueNet	-335000000	USD
CY2011Q4	fe	Investments Not Required To Be Disclosed InvestmentsNotRequiredToBeDisclosed	693000000	USD
CY2010	fe	Favourable Affect On Effective Tax Rate FavourableAffectOnEffectiveTaxRate	12000000	USD
CY2011	fe	Grace Period GracePeriod	P30M
CY2011	fe	Increase Decrease In Current Liabilities Due To Business Acquisition Purchase Price Allocation IncreaseDecreaseInCurrentLiabilitiesDueToBusinessAcquisitionPurchasePriceAllocation	4000000	USD
CY2011	fe	Increase Decrease In Noncurrent Liabilities Due To Business Acquisition Purchase Price Allocation IncreaseDecreaseInNoncurrentLiabilitiesDueToBusinessAcquisitionPurchasePriceAllocation	-9000000	USD
CY2011	fe	Increase In Noncurrent Assets Due To Business Acquisition Purchase Price Allocation IncreaseInNoncurrentAssetsDueToBusinessAcquisitionPurchasePriceAllocation	91000000	USD
CY2010Q4	fe	Investments Not Required To Be Disclosed InvestmentsNotRequiredToBeDisclosed	259000000	USD
CY2011Q4	fe	Line Of Credit Facility Pcrb Related Amount Outstanding LineOfCreditFacilityPcrbRelatedAmountOutstanding	639000000	USD
CY2011	fe	Losses In Excess Of Private Insurance Contributed For Each Nuclear Unit License LossesInExcessOfPrivateInsuranceContributedForEachNuclearUnitLicense	118000000	USD
CY2011	fe	Losses In Excess Of Private Insurance Contributed For Each Nuclear Unit License Per Unit LossesInExcessOfPrivateInsuranceContributedForEachNuclearUnitLicensePerUnit	18000000	USD
CY2011Q4	fe	Losses To Be Amortized To Interest Expenses During Next Twelve Months LossesToBeAmortizedToInterestExpensesDuringNextTwelveMonths	9000000	USD
CY2011Q4	fe	Megwatt Capacity For Retired Coal Fired Power Plants MegwattCapacityForRetiredCoalFiredPowerPlants	3349	MW
CY2011	fe	Merger Related Expenses MergerRelatedExpenses	58000000	USD
CY2011	fe	Minimum Equity To Total Capitalization Ratio To Be Maintained For Payment Of Capital Dividend MinimumEquityToTotalCapitalizationRatioToBeMaintainedForPaymentOfCapitalDividend	0.35
CY2011Q4	fe	Net Plant Excluding Construction Work In Progress NetPlantExcludingConstructionWorkInProgress	28283000000	USD
CY2010Q4	fe	Net Plant Excluding Construction Work In Progress NetPlantExcludingConstructionWorkInProgress	18993000000	USD
CY2011	fe	Non Attainment Ozone Period Hours NonAttainmentOzonePeriodHours	P8H
CY2011	fe	Nuclear Incidence Liability Per Incident Of Parent And Subsidiary Companys Based On Their Present Nuclear Ownership And Leasehold Interests NuclearIncidenceLiabilityPerIncidentOfParentAndSubsidiaryCompanysBasedOnTheirPresentNuclearOwnershipAndLeaseholdInterests	470000000	USD
CY2011	fe	Nuclear Incident Liability Not More Than In Any One Year Per Incident Of Parent And Subsidiary Companies Based On Their Present Nuclear Ownership And Leasehold Interests NuclearIncidentLiabilityNotMoreThanInAnyOneYearPerIncidentOfParentAndSubsidiaryCompaniesBasedOnTheirPresentNuclearOwnershipAndLeaseholdInterests	70000000	USD
CY2011	fe	Nuclear Insurance Policy Aggregate Indemnity NuclearInsurancePolicyAggregateIndemnity	2000000000	USD
CY2011	fe	Nuclear Insurance Policy Maximum Aggregate Assessments For Incidents At Any Covered Nuclear Facility NuclearInsurancePolicyMaximumAggregateAssessmentsForIncidentsAtAnyCoveredNuclearFacility	13000000	USD
CY2011	fe	Number Of Complaints Seek Enjoin Plant NumberOfComplaintsSeekEnjoinPlant	2	Complaints
CY2011	fe	Number Of Existing Utility Operating Companies NumberOfExistingUtilityOperatingCompanies	10	Companies
CY2011	fe	Number Of Individuals Behalf Of Which Complaint Filed NumberOfIndividualsBehalfOfWhichComplaintFiled	21	IndividualsInAComplaint
CY2011	fe	Number Of Long Term Power Purchase Agreements Maintained By Parent Company With Non Utility Generation Entities NumberOfLongTermPowerPurchaseAgreementsMaintainedByParentCompanyWithNonUtilityGenerationEntities	23	agreements
CY2011	fe	Number Of Restricted Stock Units Award NumberOfRestrictedStockUnitsAward	2	shares
CY2011	fe	Number Of Stock Based Compensation Programs NumberOfStockBasedCompensationPrograms	4	Forms
CY2011	fe	Number Of Variable Interest Contracts NumberOfVariableInterestContracts	4	entities
CY2009Q4	fe	Offsetting Primarily Related To Tax Items OffsettingPrimarilyRelatedToTaxItems	61000000	USD
CY2010	fe	Reclassification To Net Income ReclassificationToNetIncome	66000000	USD
CY2009	fe	Reclassification To Net Income ReclassificationToNetIncome	98000000	USD
CY2011	fe	Reclassification To Net Income ReclassificationToNetIncome	182000000	USD
CY2011	fe	Recognized Tax Benefits RecognizedTaxBenefits	30000000	USD
CY2011	fe	Operating And Capital Leases Expenses OperatingAndCapitalLeasesExpenses	278000000	USD
CY2009	fe	Operating And Capital Leases Expenses OperatingAndCapitalLeasesExpenses	253000000	USD
CY2010	fe	Operating And Capital Leases Expenses OperatingAndCapitalLeasesExpenses	265000000	USD
CY2011Q4	fe	Operating Lease Commitments Net Present Value OperatingLeaseCommitmentsNetPresentValue	1600000000	USD
CY2011	fe	Operating Lease Term Of Other Subsidiaries OperatingLeaseTermOfOtherSubsidiaries	30	years
CY2011	fe	Options Proposed By Epa OptionsProposedByEpa	2	options
CY2011	dei	Entity Central Index Key EntityCentralIndexKey	0001031296
CY2010	fe	Other Comprehensive Income Reclassification Adjustment Tax Portion OtherComprehensiveIncomeReclassificationAdjustmentTaxPortion	40000000	USD
CY2011	fe	Other Comprehensive Income Reclassification Adjustment Tax Portion OtherComprehensiveIncomeReclassificationAdjustmentTaxPortion	118000000	USD
CY2012Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	418216437	shares
CY2009	fe	Other Comprehensive Income Reclassification Adjustment Tax Portion OtherComprehensiveIncomeReclassificationAdjustmentTaxPortion	60000000	USD
CY2009	fe	Other Comprehensive Income Reclassification Adjustment Total Before Tax OtherComprehensiveIncomeReclassificationAdjustmentTotalBeforeTax	158000000	USD
CY2011	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2011	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2011Q4	fe	Pretax Net Operating Loss Carryforwards Expected To Utilized PretaxNetOperatingLossCarryforwardsExpectedToUtilized	11800000000	USD
CY2010	fe	Previously Reserved Clean Up Cost PreviouslyReservedCleanUpCost	30000000	USD
CY2011	fe	Principal Default Amount Specified In Debt Covenants PrincipalDefaultAmountSpecifiedInDebtCovenants	100000000	USD
CY2011	fe	Public Utilities Liability Asses With Respect To Single Nuclear Incident Based On Act PublicUtilitiesLiabilityAssesWithRespectToSingleNuclearIncidentBasedOnAct	12600000000	USD
CY2011	fe	Reduction In Effective Tax Rate ReductionInEffectiveTaxRate	7000000	USD
CY2010	fe	Reduction In Effective Tax Rate ReductionInEffectiveTaxRate	6000000	USD
CY2009	fe	Reduction In Effective Tax Rate ReductionInEffectiveTaxRate	56000000	USD
CY2011Q1	fe	Reportable Operating Segments ReportableOperatingSegments	2	Segments
	fe	Reportable Operating Segments ReportableOperatingSegments	3	Segments
CY2011Q4	fe	Request For Information From Number Of Nuclear Power Plants Total RequestForInformationFromNumberOfNuclearPowerPlantsTotal	11
CY2011Q4	fe	Retired Coal Fired Power Plants Total RetiredCoalFiredPowerPlantsTotal	9
CY2011Q2	dei	Entity Public Float EntityPublicFloat	18414	USD
CY2011	dei	Entity Registrant Name EntityRegistrantName	FIRSTENERGY CORP
CY2011	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2011	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2009Q3	fe	Reversal Of Accrued Interest Associated With Recognized Tax Benefits ReversalOfAccruedInterestAssociatedWithRecognizedTaxBenefits	161000000	USD
CY2010	fe	Rggi Auctions RggiAuctions	14	auctions
CY2011	fe	Senior Secured Term Loan Facility Term Years SeniorSecuredTermLoanFacilityTermYears	P2Y
CY2011	fe	Share Based Compensation Arrangement By Share Based Payment Award Options Converted In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsConvertedInPeriod	1805811	shares
CY2011Q4	fe	Share Based Compensation Arrangement By Share Based Payment Award Options Converted In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsConvertedInPeriodWeightedAverageExercisePrice	41.75
CY2011	fe	Subsidiary One Operating Lease Term Of Subsidiary One SubsidiaryOneOperatingLeaseTermOfSubsidiaryOne	29	years
CY2011	fe	Sulfate Impairment Designation For Approximately Mile Stretch Of River SulfateImpairmentDesignationForApproximatelyMileStretchOfRiver	P5Y
CY2011Q4	fe	Surety Bonds And Related Guarantees SuretyBondsAndRelatedGuarantees	151000000	USD
CY2011	fe	Tax Benefits Affecting Effective Tax Rate TaxBenefitsAffectingEffectiveTaxRate	5000000	USD
CY2011	fe	Time Period After Stabilization That Licensees Are Required To Submit Cleanup Plans TimePeriodAfterStabilizationThatLicenseesAreRequiredToSubmitCleanupPlans	P30D
CY2011Q4	fe	Time Period For Retired Coal Fired Power Plants TimePeriodForRetiredCoalFiredPowerPlants	P3Y
CY2011Q4	fe	Unamortized Gains Or Losses Associated With Designated Cash Flow Hedges UnamortizedGainsOrLossesAssociatedWithDesignatedCashFlowHedges	19000000	USD
CY2011Q4	fe	Unamortized Losses Associated With Prior Interest Rate Hedges UnamortizedLossesAssociatedWithPriorInterestRateHedges	79000000	USD
CY2010	fe	Uncertain Tax Positions UncertainTaxPositions	-34000000	USD
CY2011	fe	Uncertain Tax Positions UncertainTaxPositions	-12000000	USD
CY2009	fe	Uncertain Tax Positions UncertainTaxPositions	-210000000	USD
CY2011	fe	Variable Interest Entities Percentage Of Equity Interest By Unaffiliated Third Party Included In Ownership Of Entity Three VariableInterestEntitiesPercentageOfEquityInterestByUnaffiliatedThirdPartyIncludedInOwnershipOfEntityThree	0.03
CY2011	dei	Amendment Flag AmendmentFlag	false
CY2011	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2011	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2011	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2011
CY2011	dei	Document Period End Date DocumentPeriodEndDate	2011-12-31
CY2011	dei	Document Type DocumentType	10-K

Files In Submission

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0001031296-12-000012-index-headers.html	Edgar Link	pending
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0001031296-12-000012.txt	Edgar Link	pending
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fe-20111231.xml	Edgar Link	completed
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$FE
FirstEnergy Corp Stock $fe

2011 Form 10-K Financial Statement

#000103129612000012 Filed on February 28, 2012

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$FE FirstEnergy Corp Stock $fe

2011 Form 10-K Financial Statement

#000103129612000012 Filed on February 28, 2012

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$FE
FirstEnergy Corp Stock $fe