$DTE
DTE ENERGY CO Stock $dte

$dte Overview Financials Valuation SEC Filings Company Website

2012 Form 10-K Financial Statement

#000093634013000028 Filed on February 20, 2013

Income Statement

Concept	2012	2011 Q4	2011 Q3
Revenue	$8.791B	$2.163B	$2.254B
YoY Change	-0.76%	-0.46%	5.38%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$1.018B	$243.0M	$259.0M
YoY Change	2.31%	-3.57%	-4.43%
% of Gross Profit
Operating Expenses	$7.515B	$1.816B	$1.847B
YoY Change	1.06%	-0.93%	5.42%
Operating Profit	$1.279B	$346.0M	$398.0M
YoY Change	-9.99%	-1.14%	3.11%
Interest Expense	$440.0M	-$121.0M	$120.0M
YoY Change	-9.84%	-5.47%	-15.49%
% of Operating Profit	34.4%	-34.97%	30.15%
Other Income/Expense, Net	-$319.0M	$20.00M	-$113.0M
YoY Change	-25.81%	-385.71%	-11.72%
Pretax Income	$960.0M	$245.0M	$286.0M
YoY Change	-3.13%	13.95%	10.85%
Income Tax	$286.0M	$87.00M	$101.0M
% Of Pretax Income	29.79%	35.51%	35.31%
Net Earnings	$610.0M	$150.0M	$183.0M
YoY Change	-14.21%	-1.32%	12.27%
Net Earnings / Revenue	6.94%	6.93%	8.12%
Basic Earnings Per Share	$3.56	$0.88	$1.08
Diluted Earnings Per Share	$3.55	$0.88	$1.07
COMMON SHARES
Basic Shares Outstanding	171.0M shares		169.0M shares
Diluted Shares Outstanding	171.0M shares		170.0M shares

Balance Sheet

Concept	2012	2011 Q4	2011 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$65.00M	$68.00M	$46.00M
YoY Change	-4.41%	4.62%	-45.24%
Cash & Equivalents	$65.00M	$68.00M	$46.00M
Short-Term Investments
Other Short-Term Assets	$627.0M	$196.0M	$249.0M
YoY Change	-32.58%	-0.51%	-63.81%
Inventory	$761.0M	$791.0M	$776.0M
Prepaid Expenses
Receivables	$1.336B	$1.317B	$1.206B
Other Receivables	$126.0M	$90.00M	$121.0M
Total Short-Term Assets	$2.915B	$3.196B	$2.911B
YoY Change	-8.79%	0.92%	6.2%
LONG-TERM ASSETS
Property, Plant & Equipment	$14.68B	$13.75B	$13.42B
YoY Change	6.82%	5.8%	4.68%
Goodwill		$2.020B	$2.020B
YoY Change		0.0%
Intangibles		$73.00M	$74.00M
YoY Change		8.96%
Long-Term Investments	$1.630B	$1.536B	$1.479B
YoY Change	6.12%	0.13%	0.96%
Other Assets	$4.845B	$199.0M	$192.0M
YoY Change	-8.84%	-3.4%	-96.18%
Total Long-Term Assets	$23.42B	$7.605B	$7.027B
YoY Change	2.68%	4.46%	-67.35%
TOTAL ASSETS
Total Short-Term Assets	$2.915B	$3.196B	$2.911B
Total Long-Term Assets	$23.42B	$7.605B	$7.027B
Total Assets	$26.34B	$26.01B	$24.78B
YoY Change	1.27%	4.47%	2.12%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$848.0M	$782.0M	$708.0M
YoY Change	8.44%	7.27%	10.45%
Accrued Expenses	$93.00M	$95.00M	$121.0M
YoY Change	-2.11%	-14.41%	-10.37%
Deferred Revenue
YoY Change
Short-Term Debt	$240.0M	$419.0M	$275.0M
YoY Change	-42.72%	179.33%	1275.0%
Long-Term Debt Due	$817.0M	$526.0M	$247.0M
YoY Change	55.32%	-168.76%	-73.24%
Total Short-Term Liabilities	$2.768B	$2.628B	$2.100B
YoY Change	5.33%	-4.4%	-16.43%
LONG-TERM LIABILITIES
Long-Term Debt	$7.014B	$6.405B	$6.702B
YoY Change	-2.41%	4.76%	-5.26%
Other Long-Term Liabilities	$5.955B	$331.0M	$258.0M
YoY Change	-1.16%	-7.54%	-95.46%
Total Long-Term Liabilities	$12.97B	$9.141B	$8.174B
YoY Change	-1.84%	10.25%	-35.93%
TOTAL LIABILITIES
Total Short-Term Liabilities	$2.768B	$2.628B	$2.100B
Total Long-Term Liabilities	$12.97B	$9.141B	$8.174B
Total Liabilities	$18.97B	$11.77B	$10.27B
YoY Change	-0.18%	6.6%	-41.69%
SHAREHOLDERS EQUITY
Retained Earnings		$3.750B	$3.698B
YoY Change		9.3%
Common Stock		$3.417B	$3.418B
YoY Change		-0.67%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$7.373B	$7.009B	$6.970B
YoY Change
Total Liabilities & Shareholders Equity	$26.34B	$26.01B	$24.78B
YoY Change	1.27%	4.47%	2.12%

Cashflow Statement

Concept	2012	2011 Q4	2011 Q3
OPERATING ACTIVITIES
Net Income	$610.0M	$150.0M	$183.0M
YoY Change	-14.21%	-1.32%	12.27%
Depreciation, Depletion And Amortization	$1.018B	$243.0M	$259.0M
YoY Change	2.31%	-3.57%	-4.43%
Cash From Operating Activities	$2.209B	$522.0M	$327.0M
YoY Change	10.01%	65.19%	-8.66%
INVESTING ACTIVITIES
Capital Expenditures	-$1.820B	-$455.0M	-$310.0M
YoY Change	22.64%	61.92%	2.31%
Acquisitions	$198.0M
YoY Change
Other Investing Activities	$39.00M	-$53.00M	$25.00M
YoY Change	-45.83%	-52.25%	-164.1%
Cash From Investing Activities	-$1.769B	-$508.0M	-$285.0M
YoY Change	13.4%	29.59%	-16.67%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net	-$39.00M
YoY Change	-316.67%
Debt Paid & Issued, Net	$639.0M
YoY Change	-56.08%
Cash From Financing Activities	-$443.0M	8.000M	-57.00M
YoY Change	-0.45%	-85.96%	1.79%
NET CHANGE
Cash From Operating Activities	$2.209B	522.0M	327.0M
Cash From Investing Activities	-$1.769B	-508.0M	-285.0M
Cash From Financing Activities	-$443.0M	8.000M	-57.00M
Net Change In Cash	-$3.000M	22.00M	-15.00M
YoY Change	-200.0%	-215.79%	-62.5%
FREE CASH FLOW
Cash From Operating Activities	$2.209B	$522.0M	$327.0M
Capital Expenditures	-$1.820B	-$455.0M	-$310.0M
Free Cash Flow	$4.029B	$977.0M	$637.0M
YoY Change	15.38%	63.65%	-3.63%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2012Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	848000000	USD
CY2011Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	782000000	USD
CY2011Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	1317000000	USD
CY2012Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	1336000000	USD
CY2012Q4	us-gaap	Accumulated Deferred Investment Tax Credit AccumulatedDeferredInvestmentTaxCredit	56000000	USD
CY2011Q4	us-gaap	Accumulated Deferred Investment Tax Credit AccumulatedDeferredInvestmentTaxCredit	65000000	USD
CY2012Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	8947000000	USD
CY2011Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	8795000000	USD
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-29000000	USD
CY2011Q4	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-30000000	USD
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Cumulative Changes In Net Gain Loss From Cash Flow Hedges Effect Net Of Tax AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax	-4000000	USD
CY2011Q4	us-gaap	Accumulated Other Comprehensive Income Loss Cumulative Changes In Net Gain Loss From Cash Flow Hedges Effect Net Of Tax AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax	-4000000	USD
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	-127000000	USD
CY2011Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	-125000000	USD
CY2011Q4	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	1000000	USD
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	2000000	USD
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-158000000	USD
CY2011Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-158000000	USD
CY2011	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	66000000	USD
CY2012	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	83000000	USD
CY2010	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	52000000	USD
CY2011Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	162000000	USD
CY2012Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	62000000	USD
CY2010Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	196000000	USD
CY2009Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	262000000	USD
CY2012	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	6000000	USD
CY2011	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	5000000	USD
CY2010	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	4000000	USD
CY2010	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	5000000	shares
CY2012Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	1719000000	USD
CY2011Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	1593000000	USD
CY2012	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	100000000	USD
CY2012	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	27000000	USD
CY2012	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	-11000000	USD
CY2012	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	10000000	USD
	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	20000000	USD
CY2011Q1	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	19000000	USD
CY2011	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	22000000	USD
CY2012Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	1719000000	USD
CY2011Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	1591000000	USD
CY2012Q4	us-gaap	Assets Assets	26339000000	USD
CY2011Q4	us-gaap	Assets Assets	26009000000	USD
CY2012Q4	us-gaap	Assets Current AssetsCurrent	2915000000	USD
CY2011Q4	us-gaap	Assets Current AssetsCurrent	3196000000	USD
CY2012Q4	us-gaap	Assets Noncurrent AssetsNoncurrent	7149000000	USD
CY2011Q4	us-gaap	Assets Noncurrent AssetsNoncurrent	7605000000	USD
CY2010	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	192000000	USD
CY2012	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	37000000	USD
CY2011	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	46000000	USD
CY2012	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	-31000000	USD
CY2010	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	-83000000	USD
CY2011	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	-38000000	USD
CY2011Q4	us-gaap	Availableforsale Securities Gross Unrealized Gain AvailableforsaleSecuritiesGrossUnrealizedGain	102000000	USD
CY2012Q4	us-gaap	Availableforsale Securities Gross Unrealized Gain AvailableforsaleSecuritiesGrossUnrealizedGain	149000000	USD
CY2012Q4	us-gaap	Business Acquisition Cost Of Acquired Entity Cash Paid BusinessAcquisitionCostOfAcquiredEntityCashPaid	220000000	USD
CY2012Q4	us-gaap	Business Acquisition Cost Of Acquired Entity Purchase Price BusinessAcquisitionCostOfAcquiredEntityPurchasePrice	294000000	USD
CY2012Q4	us-gaap	Business Acquisition Purchase Price Allocation Amortizable Intangible Assets BusinessAcquisitionPurchasePriceAllocationAmortizableIntangibleAssets	75000000	USD
CY2012Q4	us-gaap	Business Acquisition Purchase Price Allocation Current Assets Cash And Cash Equivalents BusinessAcquisitionPurchasePriceAllocationCurrentAssetsCashAndCashEquivalents	22000000	USD
CY2012Q4	us-gaap	Business Acquisition Purchase Price Allocation Current Assets Prepaid Expense And Other Assets BusinessAcquisitionPurchasePriceAllocationCurrentAssetsPrepaidExpenseAndOtherAssets	8000000	USD
CY2012Q4	us-gaap	Business Acquisition Purchase Price Allocation Current Assets Receivables BusinessAcquisitionPurchasePriceAllocationCurrentAssetsReceivables	14000000	USD
CY2012Q4	us-gaap	Business Acquisition Purchase Price Allocation Current Liabilities BusinessAcquisitionPurchasePriceAllocationCurrentLiabilities	7000000	USD
CY2012Q4	us-gaap	Business Acquisition Purchase Price Allocation Liabilities Assumed BusinessAcquisitionPurchasePriceAllocationLiabilitiesAssumed	74000000	USD
CY2012Q4	us-gaap	Business Acquisition Purchase Price Allocation Noncontrolling Interest BusinessAcquisitionPurchasePriceAllocationNoncontrollingInterest	1000000	USD
CY2012Q4	us-gaap	Business Acquisition Purchase Price Allocation Other Noncurrent Assets BusinessAcquisitionPurchasePriceAllocationOtherNoncurrentAssets	9000000	USD
CY2012Q4	us-gaap	Business Acquisition Purchase Price Allocation Property Plant And Equipment BusinessAcquisitionPurchasePriceAllocationPropertyPlantAndEquipment	100000000	USD
CY2012Q4	us-gaap	Capital Lease Obligations Current CapitalLeaseObligationsCurrent	-6000000	USD
CY2012Q4	us-gaap	Capital Lease Obligations Noncurrent CapitalLeaseObligationsNoncurrent	12000000	USD
CY2011Q4	us-gaap	Capital Lease Obligations Noncurrent CapitalLeaseObligationsNoncurrent	23000000	USD
CY2012Q4	us-gaap	Capital Leased Assets Gross CapitalLeasedAssetsGross	32000000	USD
CY2011Q4	us-gaap	Capital Leased Assets Gross CapitalLeasedAssetsGross	57000000	USD
CY2012Q4	us-gaap	Capital Leases Contingent Rental Payments Due CapitalLeasesContingentRentalPaymentsDue	27000000	USD
CY2012Q4	us-gaap	Capital Leases Future Minimum Payments Due CapitalLeasesFutureMinimumPaymentsDue	20000000	USD
CY2012Q4	us-gaap	Capital Leases Future Minimum Payments Due Current CapitalLeasesFutureMinimumPaymentsDueCurrent	7000000	USD
CY2012Q4	us-gaap	Capital Leases Future Minimum Payments Due In Five Years CapitalLeasesFutureMinimumPaymentsDueInFiveYears	0	USD
CY2012Q4	us-gaap	Capital Leases Future Minimum Payments Due In Four Years CapitalLeasesFutureMinimumPaymentsDueInFourYears	3000000	USD
CY2012Q4	us-gaap	Capital Leases Future Minimum Payments Due In Three Years CapitalLeasesFutureMinimumPaymentsDueInThreeYears	5000000	USD
CY2012Q4	us-gaap	Capital Leases Future Minimum Payments Due In Two Years CapitalLeasesFutureMinimumPaymentsDueInTwoYears	5000000	USD
CY2012Q4	us-gaap	Capital Leases Future Minimum Payments Due Thereafter CapitalLeasesFutureMinimumPaymentsDueThereafter	0	USD
CY2012Q4	us-gaap	Capital Leases Future Minimum Payments Interest Included In Payments CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments	2000000	USD
CY2012Q4	us-gaap	Capital Leases Future Minimum Payments Present Value Of Net Minimum Payments CapitalLeasesFutureMinimumPaymentsPresentValueOfNetMinimumPayments	18000000	USD
CY2012Q4	us-gaap	Capital Leases Future Minimum Payments Receivable CapitalLeasesFutureMinimumPaymentsReceivable	91000000	USD
CY2012Q4	us-gaap	Capital Leases Future Minimum Payments Receivable Current CapitalLeasesFutureMinimumPaymentsReceivableCurrent	12000000	USD
CY2012Q4	us-gaap	Capital Leases Future Minimum Payments Receivable Due Thereafter CapitalLeasesFutureMinimumPaymentsReceivableDueThereafter	31000000	USD
CY2012Q4	us-gaap	Capital Leases Future Minimum Payments Receivable In Five Years CapitalLeasesFutureMinimumPaymentsReceivableInFiveYears	12000000	USD
CY2012Q4	us-gaap	Capital Leases Future Minimum Payments Receivable In Four Years CapitalLeasesFutureMinimumPaymentsReceivableInFourYears	12000000	USD
CY2012Q4	us-gaap	Capital Leases Future Minimum Payments Receivable In Three Years CapitalLeasesFutureMinimumPaymentsReceivableInThreeYears	12000000	USD
CY2012Q4	us-gaap	Capital Leases Future Minimum Payments Receivable In Two Years CapitalLeasesFutureMinimumPaymentsReceivableInTwoYears	12000000	USD
CY2012Q4	us-gaap	Capital Leases Lessee Balance Sheet Assets By Major Class Accumulated Deprecation CapitalLeasesLesseeBalanceSheetAssetsByMajorClassAccumulatedDeprecation	3000000	USD
CY2011Q4	us-gaap	Capital Leases Lessee Balance Sheet Assets By Major Class Accumulated Deprecation CapitalLeasesLesseeBalanceSheetAssetsByMajorClassAccumulatedDeprecation	34000000	USD
CY2012Q4	us-gaap	Capital Leases Lessor Balance Sheet Net Investment In Direct Financing Leases Current CapitalLeasesLessorBalanceSheetNetInvestmentInDirectFinancingLeasesCurrent	-4000000	USD
CY2012Q4	us-gaap	Capital Leases Lessor Balance Sheet Net Investment In Direct Financing Leases Noncurrent CapitalLeasesLessorBalanceSheetNetInvestmentInDirectFinancingLeasesNoncurrent	79000000	USD
CY2012Q4	us-gaap	Capital Leases Net Investment In Direct Financing Leases CapitalLeasesNetInvestmentInDirectFinancingLeases	83000000	USD
CY2012Q4	us-gaap	Capital Leases Net Investment In Direct Financing Leases Deferred Income CapitalLeasesNetInvestmentInDirectFinancingLeasesDeferredIncome	-48000000	USD
CY2012Q4	us-gaap	Capital Leases Net Investment In Direct Financing Leases Unguaranteed Residual Values Of Leased Property CapitalLeasesNetInvestmentInDirectFinancingLeasesUnguaranteedResidualValuesOfLeasedProperty	-40000000	USD
CY2011Q4	us-gaap	Capitalized Computer Software Accumulated Amortization CapitalizedComputerSoftwareAccumulatedAmortization	300000000	USD
CY2012Q4	us-gaap	Capitalized Computer Software Accumulated Amortization CapitalizedComputerSoftwareAccumulatedAmortization	295000000	USD
CY2012	us-gaap	Capitalized Computer Software Amortization CapitalizedComputerSoftwareAmortization	75000000	USD
CY2011	us-gaap	Capitalized Computer Software Amortization CapitalizedComputerSoftwareAmortization	65000000	USD
CY2010	us-gaap	Capitalized Computer Software Amortization CapitalizedComputerSoftwareAmortization	65000000	USD
CY2011Q4	us-gaap	Capitalized Computer Software Gross CapitalizedComputerSoftwareGross	623000000	USD
CY2012Q4	us-gaap	Capitalized Computer Software Gross CapitalizedComputerSoftwareGross	561000000	USD
CY2012Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	65000000	USD
CY2011Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	68000000	USD
CY2010Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	65000000	USD
CY2009Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	52000000	USD
CY2011Q4	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	140000000	USD
CY2012Q4	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	123000000	USD
CY2011	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	3000000	USD
CY2012	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-3000000	USD
CY2010	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	13000000	USD
CY2012Q4	us-gaap	Collateral Already Posted Aggregate Fair Value CollateralAlreadyPostedAggregateFairValue	20000000	USD
CY2011Q4	us-gaap	Collateral Already Posted Aggregate Fair Value CollateralAlreadyPostedAggregateFairValue	71000000	USD
CY2012	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	2.42
CY2010	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	2.18
CY2011	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	2.32
CY2012Q4	us-gaap	Common Stock No Par Value CommonStockNoParValue	0
CY2011Q4	us-gaap	Common Stock No Par Value CommonStockNoParValue	0
CY2012Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	400000000	shares
CY2011Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	400000000	shares
CY2011Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	169247282	shares
CY2012Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	172351680	shares
CY2012Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	172351680	shares
CY2011Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	169247282	shares
CY2012Q4	us-gaap	Common Stock Value CommonStockValue	3587000000	USD
CY2011Q4	us-gaap	Common Stock Value CommonStockValue	3417000000	USD
CY2010	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	628000000	USD
CY2012	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	610000000	USD
CY2011	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	702000000	USD
CY2010	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	9000000	USD
CY2011	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	9000000	USD
CY2012	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	8000000	USD
CY2011	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-9000000	USD
CY2010	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-2000000	USD
CY2012	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	0	USD
CY2010	us-gaap	Cost Of Goods And Services Energy Commodities And Services CostOfGoodsAndServicesEnergyCommoditiesAndServices	3190000000	USD
CY2011	us-gaap	Cost Of Goods And Services Energy Commodities And Services CostOfGoodsAndServicesEnergyCommoditiesAndServices	3537000000	USD
CY2012	us-gaap	Cost Of Goods And Services Energy Commodities And Services CostOfGoodsAndServicesEnergyCommoditiesAndServices	3296000000	USD
CY2010	us-gaap	Cost Of Services Depreciation And Amortization CostOfServicesDepreciationAndAmortization	1012000000	USD
CY2011	us-gaap	Cost Of Services Depreciation And Amortization CostOfServicesDepreciationAndAmortization	977000000	USD
CY2012	us-gaap	Cost Of Services Depreciation And Amortization CostOfServicesDepreciationAndAmortization	995000000	USD
CY2012	us-gaap	Costs And Expenses CostsAndExpenses	7512000000	USD
CY2011	us-gaap	Costs And Expenses CostsAndExpenses	7437000000	USD
CY2010	us-gaap	Costs And Expenses CostsAndExpenses	7055000000	USD
CY2011	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	27000000	USD
CY2012	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	190000000	USD
CY2010	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-168000000	USD
CY2011	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	48000000	USD
CY2012	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	239000000	USD
CY2010	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-142000000	USD
CY2012	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	49000000	USD
CY2011	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	21000000	USD
CY2010	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	26000000	USD
CY2011Q4	us-gaap	Debt Current DebtCurrent	-355000000	USD
CY2012Q4	us-gaap	Debt Current DebtCurrent	-634000000	USD
CY2012Q4	us-gaap	Debt Instrument Face Amount DebtInstrumentFaceAmount	770000000	USD
CY2012Q4	us-gaap	Decommissioning Fund Investments DecommissioningFundInvestments	1037000000	USD
CY2011Q4	us-gaap	Decommissioning Fund Investments DecommissioningFundInvestments	937000000	USD
CY2011Q4	us-gaap	Decommissioning Liability Noncurrent DecommissioningLiabilityNoncurrent	148000000	USD
CY2012Q4	us-gaap	Decommissioning Liability Noncurrent DecommissioningLiabilityNoncurrent	159000000	USD
CY2012Q4	us-gaap	Decommissioning Trust Assets Amount DecommissioningTrustAssetsAmount	1037000000	USD
CY2011Q4	us-gaap	Decommissioning Trust Assets Amount DecommissioningTrustAssetsAmount	937000000	USD
CY2012	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	39000000	USD
CY2011	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	318000000	USD
CY2010	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	415000000	USD
CY2011	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	220000000	USD
CY2010	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	457000000	USD
CY2010	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	42000000	USD
CY2011	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-98000000	USD
CY2012	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	8000000	USD
CY2010Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	-3065000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	-3170000000	USD
CY2012	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	47000000	USD
CY2010	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	457000000	USD
CY2011	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	220000000	USD
CY2012	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	47000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	1038000000	USD
CY2010Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	1048000000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Net Current DeferredTaxAssetsNetCurrent	51000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Net Current DeferredTaxAssetsNetCurrent	21000000	USD
CY2010Q4	us-gaap	Deferred Tax Assets Net Current DeferredTaxAssetsNetCurrent	51000000	USD
CY2010Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	-45000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	41000000	USD
CY2010Q4	us-gaap	Deferred Tax Assets Other Comprehensive Loss DeferredTaxAssetsOtherComprehensiveLoss	99000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Other Comprehensive Loss DeferredTaxAssetsOtherComprehensiveLoss	101000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax	254000000	USD
CY2010Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax	294000000	USD
CY2010Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	-39000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	-33000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	33000000	USD
CY2010Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	27000000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	-4208000000	USD
CY2010Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	-4113000000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	3116000000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	3191000000	USD
CY2010Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	3116000000	USD
CY2010Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	3131000000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	3389000000	USD
CY2010Q4	us-gaap	Deferred Tax Liabilities Regulatory Assets DeferredTaxLiabilitiesRegulatoryAssets	360000000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Regulatory Assets DeferredTaxLiabilitiesRegulatoryAssets	256000000	USD
CY2012Q4	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	1498000000	USD
CY2011Q4	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	1298000000	USD
CY2012	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Decrease On Service And Interest Cost Components1 DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnServiceAndInterestCostComponents1	19000000	USD
CY2012	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Increase On Accumulated Postretirement Benefit Obligation DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnAccumulatedPostretirementBenefitObligation	279000000	USD
CY2010	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	34000000	USD
CY2012	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	37000000	USD
CY2011	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	35000000	USD
CY2011	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	995000000	USD
CY2010	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	1027000000	USD
CY2012	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	1018000000	USD
CY2012Q4	us-gaap	Derivative Assets DerivativeAssets	1417000000	USD
CY2011Q4	us-gaap	Derivative Assets DerivativeAssets	1468000000	USD
CY2011Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	222000000	USD
CY2012Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	108000000	USD
CY2011Q4	us-gaap	Derivative Assets Liabilities At Fair Value Net DerivativeAssetsLiabilitiesAtFairValueNet	1221000000	USD
CY2012Q4	us-gaap	Derivative Assets Liabilities At Fair Value Net DerivativeAssetsLiabilitiesAtFairValueNet	1266000000	USD
CY2012Q4	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	39000000	USD
CY2011Q4	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	74000000	USD
CY2011Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	2805000000	USD
CY2012Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	1016000000	USD
CY2011Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	-2811000000	USD
CY2012Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	-1020000000	USD
CY2012	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	65000000	USD
CY2011	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	159000000	USD
CY2012Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	-151000000	USD
CY2011Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	-247000000	USD
CY2012Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	125000000	USD
CY2011Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	158000000	USD
CY2012Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	26000000	USD
CY2011Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	89000000	USD
CY2012	us-gaap	Discontinued Operation Gain Loss From Disposal Of Discontinued Operation Before Income Tax DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax	83000000	USD
CY2012	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	55000000	USD
CY2010	us-gaap	Distributed Earnings DistributedEarnings	367000000	USD
CY2011	us-gaap	Distributed Earnings DistributedEarnings	393000000	USD
CY2012	us-gaap	Distributed Earnings DistributedEarnings	414000000	USD
CY2012	us-gaap	Dividends Cash DividendsCash	1000000	USD
CY2010	us-gaap	Dividends Cash DividendsCash	2000000	USD
CY2011	us-gaap	Dividends Cash DividendsCash	1000000	USD
CY2011Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	99000000	USD
CY2012Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	107000000	USD
CY2011	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.19
CY2012	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.56
CY2010	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.75
CY2012Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.91
CY2012Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.32
CY2012Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.86
CY2012Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.47
CY2011Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.88
CY2011Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.19
CY2011Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.08
CY2011Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.04
CY2011	us-gaap	Earnings Per Share Basic Distributed EarningsPerShareBasicDistributed	2.32
CY2010	us-gaap	Earnings Per Share Basic Distributed EarningsPerShareBasicDistributed	2.18
CY2012	us-gaap	Earnings Per Share Basic Distributed EarningsPerShareBasicDistributed	2.42
CY2011	us-gaap	Earnings Per Share Basic Undistributed EarningsPerShareBasicUndistributed	1.87
CY2010	us-gaap	Earnings Per Share Basic Undistributed EarningsPerShareBasicUndistributed	1.57
CY2012	us-gaap	Earnings Per Share Basic Undistributed EarningsPerShareBasicUndistributed	1.14
CY2011	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.18
CY2012	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.55
CY2010	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.74
CY2012Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.31
CY2012Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.86
CY2012Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0
CY2012Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.91
CY2011Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.88
CY2011Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.04
CY2011Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.19
CY2011Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.07
CY2010	us-gaap	Earnings Per Share Diluted Distributed EarningsPerShareDilutedDistributed	2.18
CY2011	us-gaap	Earnings Per Share Diluted Distributed EarningsPerShareDilutedDistributed	2.32
CY2012	us-gaap	Earnings Per Share Diluted Distributed EarningsPerShareDilutedDistributed	2.42
CY2011	us-gaap	Earnings Per Share Diluted Undistributed EarningsPerShareDilutedUndistributed	1.86
CY2010	us-gaap	Earnings Per Share Diluted Undistributed EarningsPerShareDilutedUndistributed	1.56
CY2012	us-gaap	Earnings Per Share Diluted Undistributed EarningsPerShareDilutedUndistributed	1.13
CY2010	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.327
CY2011	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.270
CY2012	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.298
CY2010	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	3000000	USD
CY2011	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	4000000	USD
CY2012	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	5000000	USD
CY2012Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	58000000	USD
CY2012	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P1Y4M15D
CY2011	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	25000000	USD
CY2010	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	20000000	USD
CY2012	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	33000000	USD
CY2011Q4	us-gaap	Excess Of Replacement Or Current Costs Over Stated Lifo Value ExcessOfReplacementOrCurrentCostsOverStatedLIFOValue	95000000	USD
CY2012Q4	us-gaap	Excess Of Replacement Or Current Costs Over Stated Lifo Value ExcessOfReplacementOrCurrentCostsOverStatedLIFOValue	113000000	USD
CY2012	us-gaap	Extinguishment Of Debt Amount ExtinguishmentOfDebtAmount	639000000	USD
CY2012	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings1 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1	60000000	USD
CY2011	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings1 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1	87000000	USD
CY2012	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Period Increase Decrease FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPeriodIncreaseDecrease	58000000	USD
CY2011	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Period Increase Decrease FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPeriodIncreaseDecrease	75000000	USD
CY2012	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases	2000000	USD
CY2011	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases	3000000	USD
CY2012	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements	-135000000	USD
CY2011	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements	-87000000	USD
CY2012	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Into Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3	1000000	USD
CY2011	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Into Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3	4000000	USD
CY2011	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Out Of Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3	-24000000	USD
CY2012	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Out Of Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3	0	USD
CY2012Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	-13000000	USD
CY2011Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	44000000	USD
CY2010Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	59000000	USD
CY2012Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	34000000	USD
CY2011Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	28000000	USD
CY2011Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	114000000	USD
CY2012Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	189000000	USD
CY2011Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	86000000	USD
CY2012Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	155000000	USD
CY2012	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	83000000	USD
CY2010	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	0	USD
CY2011	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	0	USD
CY2011	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	389000000	USD
CY2011Q4	us-gaap	Goodwill Goodwill	2020000000	USD
CY2012Q4	us-gaap	Goodwill Goodwill	2018000000	USD
CY2010Q4	us-gaap	Goodwill Goodwill	2020000000	USD
CY2012	us-gaap	Goodwill Period Increase Decrease GoodwillPeriodIncreaseDecrease	-2000000	USD
CY2011	us-gaap	Goodwill Period Increase Decrease GoodwillPeriodIncreaseDecrease	0	USD
CY2012Q2	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	147000000	USD
CY2012Q1	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	156000000	USD
CY2012Q4	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	137000000	USD
CY2012Q3	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	226000000	USD
CY2012	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	666000000	USD
CY2011	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	714000000	USD
CY2011Q3	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	183000000	USD
CY2011Q2	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	203000000	USD
CY2011Q1	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	177000000	USD
CY2011Q4	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	151000000	USD
CY2012	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	960000000	USD
CY2011	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	991000000	USD
CY2010	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	962000000	USD
CY2011	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	723000000	USD
CY2012	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	674000000	USD
CY2010	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	647000000	USD
CY2011	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	4.21
CY2010	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	3.79
CY2012	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	3.89
CY2012Q4	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.79
CY2012Q2	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.87
CY2010	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	-8000000	USD
CY2012Q1	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.91
CY2012Q3	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	1.31
CY2011Q2	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	1.19
CY2011Q3	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	1.08
CY2011Q4	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.88
CY2011Q1	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	1.05
CY2011	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	4.20
CY2010	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	3.78
CY2012	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	3.88
CY2012Q1	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.91
CY2012Q4	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.79
CY2012Q3	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	1.30
CY2012Q2	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.87
CY2011Q4	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.88
CY2011Q3	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	1.07
CY2011Q1	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	1.05
CY2011Q2	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	1.19
CY2011	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	-3000000	USD
CY2012	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	-56000000	USD
CY2012Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	0	USD
CY2012Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	1000000	USD
CY2012Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	-1000000	USD
CY2012Q4	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	-56000000	USD
CY2011Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	0	USD
CY2011Q4	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	-1000000	USD
CY2011Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	-1000000	USD
CY2011Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	-1000000	USD
CY2012	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	-0.33
CY2010	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	-0.04
CY2011	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	-0.02
CY2012Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.00
CY2012Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	-0.01
CY2012Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.01
CY2012Q4	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	-0.32
CY2011Q4	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.00
CY2011Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.00
CY2011Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	-0.01
CY2011Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.00
CY2012	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	-0.33
CY2011	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	-0.02
CY2010	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	-0.04
CY2012Q4	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	-0.32
CY2012Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0
CY2012Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	-0.01
CY2012Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.01
CY2011Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0
CY2011Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0
CY2011Q4	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0
CY2011Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	-0.01
CY2011	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	268000000	USD
CY2012	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	286000000	USD
CY2010	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	315000000	USD
CY2011Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	87000000	USD
CY2012	us-gaap	Income Tax Expense Benefit Intraperiod Tax Allocation IncomeTaxExpenseBenefitIntraperiodTaxAllocation	286000000	USD
CY2011	us-gaap	Income Tax Expense Benefit Intraperiod Tax Allocation IncomeTaxExpenseBenefitIntraperiodTaxAllocation	268000000	USD
CY2010	us-gaap	Income Tax Expense Benefit Intraperiod Tax Allocation IncomeTaxExpenseBenefitIntraperiodTaxAllocation	315000000	USD
CY2010	us-gaap	Income Tax Rate Reconciliation Deductions Employee Stock Ownership Plan Dividends IncomeTaxRateReconciliationDeductionsEmployeeStockOwnershipPlanDividends	5000000	USD
CY2012	us-gaap	Income Tax Rate Reconciliation Deductions Employee Stock Ownership Plan Dividends IncomeTaxRateReconciliationDeductionsEmployeeStockOwnershipPlanDividends	4000000	USD
CY2011	us-gaap	Income Tax Rate Reconciliation Deductions Employee Stock Ownership Plan Dividends IncomeTaxRateReconciliationDeductionsEmployeeStockOwnershipPlanDividends	4000000	USD
CY2012	us-gaap	Income Tax Reconciliation Deductions Qualified Production Activities IncomeTaxReconciliationDeductionsQualifiedProductionActivities	14000000	USD
CY2011	us-gaap	Income Tax Reconciliation Deductions Qualified Production Activities IncomeTaxReconciliationDeductionsQualifiedProductionActivities	7000000	USD
CY2010	us-gaap	Income Tax Reconciliation Deductions Qualified Production Activities IncomeTaxReconciliationDeductionsQualifiedProductionActivities	7000000	USD
CY2012	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	336000000	USD
CY2011	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	347000000	USD
CY2010	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	337000000	USD
CY2010	us-gaap	Income Tax Reconciliation Nondeductible Expense Depreciation IncomeTaxReconciliationNondeductibleExpenseDepreciation	-4000000	USD
CY2012	us-gaap	Income Tax Reconciliation Nondeductible Expense Depreciation IncomeTaxReconciliationNondeductibleExpenseDepreciation	-4000000	USD
CY2011	us-gaap	Income Tax Reconciliation Nondeductible Expense Depreciation IncomeTaxReconciliationNondeductibleExpenseDepreciation	-4000000	USD
CY2011	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-2000000	USD
CY2010	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	1000000	USD
CY2012	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-10000000	USD
CY2012	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	257000000	USD
CY2010	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	311000000	USD
CY2011	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	267000000	USD
CY2011	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	6000000	USD
CY2012	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	6000000	USD
CY2010	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	6000000	USD
CY2010	us-gaap	Income Tax Reconciliation Tax Credits Other IncomeTaxReconciliationTaxCreditsOther	33000000	USD
CY2012	us-gaap	Income Tax Reconciliation Tax Credits Other IncomeTaxReconciliationTaxCreditsOther	49000000	USD
CY2011	us-gaap	Income Tax Reconciliation Tax Credits Other IncomeTaxReconciliationTaxCreditsOther	6000000	USD
CY2010	us-gaap	Income Tax Reconciliation Tax Settlements Domestic IncomeTaxReconciliationTaxSettlementsDomestic	-12000000	USD
CY2012	us-gaap	Income Tax Reconciliation Tax Settlements Domestic IncomeTaxReconciliationTaxSettlementsDomestic	0	USD
CY2011	us-gaap	Income Tax Reconciliation Tax Settlements Domestic IncomeTaxReconciliationTaxSettlementsDomestic	0	USD
CY2011	us-gaap	Income Taxes Paid IncomeTaxesPaid	-205000000	USD
CY2010	us-gaap	Income Taxes Paid IncomeTaxesPaid	93000000	USD
CY2012	us-gaap	Income Taxes Paid IncomeTaxesPaid	173000000	USD
CY2010	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-12000000	USD
CY2012	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-40000000	USD
CY2011	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	23000000	USD
CY2010	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	79000000	USD
CY2011Q4	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	1884000000	USD
CY2012Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	817000000	USD
CY2011	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	71000000	USD
CY2012	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	52000000	USD
CY2012	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-30000000	USD
CY2010	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	245000000	USD
CY2011	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-249000000	USD
CY2012	us-gaap	Increase Decrease In Commodity Contract Assets And Liabilities IncreaseDecreaseInCommodityContractAssetsAndLiabilities	53000000	USD
CY2011	us-gaap	Increase Decrease In Commodity Contract Assets And Liabilities IncreaseDecreaseInCommodityContractAssetsAndLiabilities	-94000000	USD
CY2010	us-gaap	Increase Decrease In Commodity Contract Assets And Liabilities IncreaseDecreaseInCommodityContractAssetsAndLiabilities	-48000000	USD
CY2010	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-133000000	USD
CY2012	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	35000000	USD
CY2011	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-129000000	USD
CY2010	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	-293000000	USD
CY2011	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	94000000	USD
CY2012	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	442000000	USD
CY2012	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	117000000	USD
CY2011	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-28000000	USD
CY2010	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-15000000	USD
CY2012	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-442000000	USD
CY2010	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	293000000	USD
CY2011	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-94000000	USD
CY2010	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-83000000	USD
CY2011	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	11000000	USD
CY2012	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	105000000	USD
CY2011	us-gaap	Increase Decrease In Postretirement Obligations IncreaseDecreaseInPostretirementObligations	-209000000	USD
CY2012	us-gaap	Increase Decrease In Postretirement Obligations IncreaseDecreaseInPostretirementObligations	323000000	USD
CY2010	us-gaap	Increase Decrease In Postretirement Obligations IncreaseDecreaseInPostretirementObligations	24000000	USD
CY2012	us-gaap	Increase Decrease In Prepaid Pension Costs IncreaseDecreaseInPrepaidPensionCosts	280000000	USD
CY2011	us-gaap	Increase Decrease In Prepaid Pension Costs IncreaseDecreaseInPrepaidPensionCosts	432000000	USD
CY2010	us-gaap	Increase Decrease In Prepaid Pension Costs IncreaseDecreaseInPrepaidPensionCosts	67000000	USD
CY2011	us-gaap	Increase Decrease In Regulatory Assets And Liabilities IncreaseDecreaseInRegulatoryAssetsAndLiabilities	38000000	USD
CY2012	us-gaap	Increase Decrease In Regulatory Assets And Liabilities IncreaseDecreaseInRegulatoryAssetsAndLiabilities	122000000	USD
CY2010	us-gaap	Increase Decrease In Regulatory Assets And Liabilities IncreaseDecreaseInRegulatoryAssetsAndLiabilities	-37000000	USD
CY2011	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	5000000	USD
CY2010	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	32000000	USD
CY2012	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	-2000000	USD
CY2012	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1000000	shares
CY2010	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1000000	shares
CY2011	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1000000	shares
CY2012Q4	us-gaap	Intangible Assets Current IntangibleAssetsCurrent	-20000000	USD
CY2011Q4	us-gaap	Intangible Assets Current IntangibleAssetsCurrent	-13000000	USD
CY2011Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	73000000	USD
CY2012Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	135000000	USD
CY2012	us-gaap	Interest Expense InterestExpense	440000000	USD
CY2011	us-gaap	Interest Expense InterestExpense	488000000	USD
CY2010	us-gaap	Interest Expense InterestExpense	543000000	USD
CY2012	us-gaap	Interest Paid InterestPaid	438000000	USD
CY2010	us-gaap	Interest Paid InterestPaid	551000000	USD
CY2011	us-gaap	Interest Paid InterestPaid	485000000	USD
CY2011Q4	us-gaap	Interest Payable Current InterestPayableCurrent	95000000	USD
CY2012Q4	us-gaap	Interest Payable Current InterestPayableCurrent	93000000	USD
CY2012Q4	us-gaap	Interest Rate Cash Flow Hedge Gain Loss To Be Reclassified During Next12 Months Net InterestRateCashFlowHedgeGainLossToBeReclassifiedDuringNext12MonthsNet	1000000	USD
CY2012Q4	us-gaap	Inventory Raw Materials InventoryRawMaterials	527000000	USD
CY2011Q4	us-gaap	Inventory Raw Materials InventoryRawMaterials	572000000	USD
CY2012	us-gaap	Investment Income Interest InvestmentIncomeInterest	10000000	USD
CY2010	us-gaap	Investment Income Interest InvestmentIncomeInterest	12000000	USD
CY2011	us-gaap	Investment Income Interest InvestmentIncomeInterest	10000000	USD
CY2011Q4	us-gaap	Investments Fair Value Disclosure InvestmentsFairValueDisclosure	95000000	USD
CY2012Q4	us-gaap	Investments Fair Value Disclosure InvestmentsFairValueDisclosure	110000000	USD
CY2012Q4	us-gaap	Junior Subordinated Long Term Notes JuniorSubordinatedLongTermNotes	480000000	USD
CY2011Q4	us-gaap	Junior Subordinated Long Term Notes JuniorSubordinatedLongTermNotes	280000000	USD
CY2012Q4	us-gaap	Lifo Inventory Amount LIFOInventoryAmount	37000000	USD
CY2011Q4	us-gaap	Lifo Inventory Amount LIFOInventoryAmount	52000000	USD
CY2010	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	32000000	USD
CY2011	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	40000000	USD
CY2012	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	36000000	USD
CY2012Q4	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	73000000	USD
CY2011Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	26009000000	USD
CY2012Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	26339000000	USD
CY2012Q4	us-gaap	Liabilities Current LiabilitiesCurrent	2768000000	USD
CY2011Q4	us-gaap	Liabilities Current LiabilitiesCurrent	2628000000	USD
CY2011Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	9141000000	USD
CY2012Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	9146000000	USD
CY2012Q4	us-gaap	Line Of Credit Facility Amount Outstanding LineOfCreditFacilityAmountOutstanding	-415000000	USD
CY2012Q4	us-gaap	Line Of Credit Facility Current Borrowing Capacity LineOfCreditFacilityCurrentBorrowingCapacity	1975000000	USD
CY2012	us-gaap	Line Of Credit Facility Dividend Restrictions LineOfCreditFacilityDividendRestrictions	239
CY2012	us-gaap	Line Of Credit Facility Increase Additional Borrowings LineOfCreditFacilityIncreaseAdditionalBorrowings	40000000	USD
CY2012Q4	us-gaap	Line Of Credit Facility Remaining Borrowing Capacity LineOfCreditFacilityRemainingBorrowingCapacity	1560000000	USD
CY2012Q4	us-gaap	Lines Of Credit Current LinesOfCreditCurrent	-175000000	USD
CY2012Q4	us-gaap	Long Term Commercial Paper Current LongTermCommercialPaperCurrent	-240000000	USD
CY2011Q4	us-gaap	Long Term Debt LongTermDebt	7682000000	USD
CY2012Q4	us-gaap	Long Term Debt LongTermDebt	7813000000	USD
CY2011Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	7187000000	USD
CY2012Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	7014000000	USD
CY2011Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	526000000	USD
CY2011Q4	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	8757000000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	5166000000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	811000000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	9000000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	465000000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	476000000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	891000000	USD
CY2011Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	6405000000	USD
CY2012Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	6220000000	USD
CY2011Q4	us-gaap	Long Term Investments LongTermInvestments	1462000000	USD
CY2012Q4	us-gaap	Long Term Investments LongTermInvestments	1591000000	USD
CY2012	us-gaap	Long Term Purchase Commitment Amount LongTermPurchaseCommitmentAmount	4400000000	USD
CY2011Q4	us-gaap	Long Term Transition Bond LongTermTransitionBond	479000000	USD
CY2012Q4	us-gaap	Long Term Transition Bond LongTermTransitionBond	302000000	USD
CY2011Q4	us-gaap	Longterm Transition Bond Current And Noncurrent LongtermTransitionBondCurrentAndNoncurrent	479000000	USD
CY2012Q4	us-gaap	Longterm Transition Bond Current And Noncurrent LongtermTransitionBondCurrentAndNoncurrent	302000000	USD
CY2012Q4	us-gaap	Minority Interest MinorityInterest	38000000	USD
CY2011Q4	us-gaap	Minority Interest MinorityInterest	44000000	USD
CY2012	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-443000000	USD
CY2010	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-586000000	USD
CY2011	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-445000000	USD
CY2012	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1769000000	USD
CY2011	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1560000000	USD
CY2010	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1226000000	USD
CY2012	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	2209000000	USD
CY2011	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	2008000000	USD
CY2010	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1825000000	USD
CY2011	us-gaap	Net Income Loss NetIncomeLoss	711000000	USD
CY2012	us-gaap	Net Income Loss NetIncomeLoss	610000000	USD
CY2010	us-gaap	Net Income Loss NetIncomeLoss	630000000	USD
CY2012Q4	us-gaap	Net Income Loss NetIncomeLoss	81000000	USD
CY2012Q3	us-gaap	Net Income Loss NetIncomeLoss	227000000	USD
CY2012Q1	us-gaap	Net Income Loss NetIncomeLoss	156000000	USD
CY2012Q2	us-gaap	Net Income Loss NetIncomeLoss	146000000	USD
CY2011Q3	us-gaap	Net Income Loss NetIncomeLoss	183000000	USD
CY2011Q2	us-gaap	Net Income Loss NetIncomeLoss	202000000	USD
CY2011Q4	us-gaap	Net Income Loss NetIncomeLoss	150000000	USD
CY2011Q4	us-gaap	Other Assets Current OtherAssetsCurrent	196000000	USD
CY2011Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	199000000	USD
CY2012Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	197000000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	20000000	USD
CY2011Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	398000000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	233000000	USD
CY2011Q1	us-gaap	Net Income Loss NetIncomeLoss	176000000	USD
CY2010	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	9000000	USD
CY2011	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	9000000	USD
CY2012	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	8000000	USD
CY2010	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-508000000	USD
CY2011	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-430000000	USD
CY2012	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-319000000	USD
CY2011Q4	us-gaap	Notes And Loans Receivable Net Noncurrent NotesAndLoansReceivableNetNoncurrent	123000000	USD
CY2012Q4	us-gaap	Notes And Loans Receivable Net Noncurrent NotesAndLoansReceivableNetNoncurrent	112000000	USD
CY2011Q4	us-gaap	Notes Payable Fair Value Disclosure NotesPayableFairValueDisclosure	419000000	USD
CY2011Q4	us-gaap	Notes Receivable Fair Value Disclosure NotesReceivableFairValueDisclosure	48000000	USD
CY2012	us-gaap	Number Of Businesses Acquired NumberOfBusinessesAcquired	14	facilities
CY2010	us-gaap	Operating Income Loss OperatingIncomeLoss	1470000000	USD
CY2012	us-gaap	Operating Income Loss OperatingIncomeLoss	1279000000	USD
CY2011	us-gaap	Operating Income Loss OperatingIncomeLoss	1421000000	USD
CY2012Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	312000000	USD
CY2012Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	267000000	USD
CY2012Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	294000000	USD
CY2012Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	406000000	USD
CY2011Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	346000000	USD
CY2011Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	389000000	USD
CY2011Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	288000000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	38000000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	20000000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	21000000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	25000000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	31000000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	98000000	USD
CY2012Q4	us-gaap	Other Assets Current OtherAssetsCurrent	194000000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	0	USD
CY2012	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-1000000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	0	USD
CY2011	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	0	USD
CY2010	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	-2000000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-1000000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-1000000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	0	USD
CY2011Q4	us-gaap	Other Intangible Assets Net OtherIntangibleAssetsNet	65000000	USD
CY2011Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	331000000	USD
CY2011Q4	us-gaap	Other Long Term Investments OtherLongTermInvestments	525000000	USD
CY2012Q4	us-gaap	Other Long Term Investments OtherLongTermInvestments	554000000	USD
CY2011Q4	us-gaap	Other Inventory Supplies OtherInventorySupplies	219000000	USD
CY2012Q4	us-gaap	Other Inventory Supplies OtherInventorySupplies	234000000	USD
CY2011	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	69000000	USD
CY2012Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	538000000	USD
CY2010	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	55000000	USD
CY2012	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	62000000	USD
CY2011	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	1000000	USD
CY2012	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	-3000000	USD
CY2010	us-gaap	Other Income OtherIncome	78000000	USD
CY2012	us-gaap	Other Income OtherIncome	173000000	USD
CY2011	us-gaap	Other Income OtherIncome	117000000	USD
CY2012Q4	us-gaap	Other Intangible Assets Net OtherIntangibleAssetsNet	139000000	USD
CY2011Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	549000000	USD
CY2012Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	306000000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	0	USD
CY2010	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	15000000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-2000000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-9000000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax	0	USD
CY2010	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax	-1000000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax	0	USD
CY2012	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	0	USD
CY2011	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	0	USD
CY2010	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	-20000000	USD
CY2012Q4	us-gaap	Other Postretirement Defined Benefit Plan Liabilities Noncurrent OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent	1160000000	USD
CY2011Q4	us-gaap	Other Postretirement Defined Benefit Plan Liabilities Noncurrent OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent	1484000000	USD
CY2011Q4	us-gaap	Other Receivables OtherReceivables	90000000	USD
CY2012Q4	us-gaap	Other Receivables OtherReceivables	126000000	USD
CY2011Q4	us-gaap	Other Short Term Borrowings OtherShortTermBorrowings	56000000	USD
CY2012Q4	us-gaap	Other Short Term Borrowings OtherShortTermBorrowings	65000000	USD
CY2012	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet	0	USD
CY2011	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet	0	USD
CY2010	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet	0	USD
CY2010	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	88000000	USD
CY2012	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	41000000	USD
CY2011	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	69000000	USD
CY2011	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	18000000	USD
CY2012	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2010	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2010	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	360000000	USD
CY2012	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	407000000	USD
CY2011	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2011	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	3000000	USD
CY2012	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	0	USD
CY2010	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	49000000	USD
CY2012	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	102000000	USD
CY2011	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	97000000	USD
CY2010	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	410000000	USD
CY2012	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	198000000	USD
CY2010	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2012	us-gaap	Prescription Drug Benefit Effect Of Subsidy On Net Periodic Postretirement Benefit Cost1 PrescriptionDrugBenefitEffectOfSubsidyOnNetPeriodicPostretirementBenefitCost1	6000000	USD
CY2010	us-gaap	Prescription Drug Benefit Effect Of Subsidy On Net Periodic Postretirement Benefit Cost1 PrescriptionDrugBenefitEffectOfSubsidyOnNetPeriodicPostretirementBenefitCost1	7000000	USD
CY2011	us-gaap	Prescription Drug Benefit Effect Of Subsidy On Net Periodic Postretirement Benefit Cost1 PrescriptionDrugBenefitEffectOfSubsidyOnNetPeriodicPostretirementBenefitCost1	6000000	USD
CY2011	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	0	USD
CY2010	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	0	USD
CY2012	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	255000000	USD
CY2010	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	36000000	USD
CY2011	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	USD
CY2012	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	39000000	USD
CY2011	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	1179000000	USD
CY2012	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	759000000	USD
CY2010	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	614000000	USD
CY2012	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-16000000	USD
CY2011	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-31000000	USD
CY2010	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-36000000	USD
CY2012	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-179000000	USD
CY2011	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	269000000	USD
CY2010	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-177000000	USD
CY2011	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	80000000	USD
CY2012	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	97000000	USD
CY2010	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	377000000	USD
CY2012	us-gaap	Proceeds From Sale Of Other Productive Assets ProceedsFromSaleOfOtherProductiveAssets	38000000	USD
CY2011	us-gaap	Proceeds From Sale Of Other Productive Assets ProceedsFromSaleOfOtherProductiveAssets	18000000	USD
CY2010	us-gaap	Proceeds From Sale Of Other Productive Assets ProceedsFromSaleOfOtherProductiveAssets	56000000	USD
CY2011	us-gaap	Profit Loss ProfitLoss	720000000	USD
CY2012	us-gaap	Profit Loss ProfitLoss	618000000	USD
CY2010	us-gaap	Profit Loss ProfitLoss	639000000	USD
CY2012Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	23631000000	USD
CY2011Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	22541000000	USD
CY2012Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	14684000000	USD
CY2011Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	13746000000	USD
CY2012Q4	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	1921000000	USD
CY2011Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	314000000	USD
CY2012	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Interest PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest	20000000	USD
CY2011	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Interest PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest	10000000	USD
CY2012Q4	us-gaap	Regulatory Assets RegulatoryAssets	4417000000	USD
CY2011Q4	us-gaap	Regulatory Assets RegulatoryAssets	4853000000	USD
CY2012Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	182000000	USD
CY2011Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	4539000000	USD
CY2012Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	4235000000	USD
CY2011Q4	us-gaap	Regulatory Liabilities RegulatoryLiabilities	1126000000	USD
CY2012Q4	us-gaap	Regulatory Liabilities RegulatoryLiabilities	1120000000	USD
CY2012Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	-89000000	USD
CY2011Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	-107000000	USD
CY2011Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	1019000000	USD
CY2012Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	1031000000	USD
CY2011	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	1455000000	USD
CY2012	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	639000000	USD
CY2010	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	663000000	USD
CY2011Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	147000000	USD
CY2012Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	122000000	USD
CY2012Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	3944000000	USD
CY2011Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	3750000000	USD
CY2012	us-gaap	Revenues From Transactions With Other Operating Segments Of Same Entity RevenuesFromTransactionsWithOtherOperatingSegmentsOfSameEntity	848000000	USD
CY2010	us-gaap	Revenues From Transactions With Other Operating Segments Of Same Entity RevenuesFromTransactionsWithOtherOperatingSegmentsOfSameEntity	219000000	USD
CY2011	us-gaap	Revenues From Transactions With Other Operating Segments Of Same Entity RevenuesFromTransactionsWithOtherOperatingSegmentsOfSameEntity	301000000	USD
CY2011	us-gaap	Sales Revenue Net SalesRevenueNet	8858000000	USD
CY2012	us-gaap	Sales Revenue Net SalesRevenueNet	8791000000	USD
CY2010	us-gaap	Sales Revenue Net SalesRevenueNet	8525000000	USD
CY2012Q3	us-gaap	Sales Revenue Net SalesRevenueNet	2190000000	USD
CY2012Q2	us-gaap	Sales Revenue Net SalesRevenueNet	2013000000	USD
CY2012Q4	us-gaap	Sales Revenue Net SalesRevenueNet	2349000000	USD
CY2012Q1	us-gaap	Sales Revenue Net SalesRevenueNet	2239000000	USD
CY2011Q2	us-gaap	Sales Revenue Net SalesRevenueNet	2018000000	USD
CY2011Q3	us-gaap	Sales Revenue Net SalesRevenueNet	2254000000	USD
CY2011Q4	us-gaap	Sales Revenue Net SalesRevenueNet	2163000000	USD
CY2011Q1	us-gaap	Sales Revenue Net SalesRevenueNet	2423000000	USD
CY2011Q4	us-gaap	Securitized Regulatory Transition Assets Noncurrent SecuritizedRegulatoryTransitionAssetsNoncurrent	577000000	USD
CY2012Q4	us-gaap	Securitized Regulatory Transition Assets Noncurrent SecuritizedRegulatoryTransitionAssetsNoncurrent	413000000	USD
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod	0	shares
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	22000000	USD
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	991826	shares
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	41.44
CY2011	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P6Y
CY2012Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	19000000	USD
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	9000000	USD
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	25000000	USD
CY2012	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P4Y3M20D
CY2012Q4	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Exercisable Options Weighted Average Exercise Price1 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1	41.86
CY2012	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding Options Weighted Average Remaining Contractual Term2 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2	P4Y9M11D
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	20000000	USD
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	-16773	shares
CY2011Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	419000000	USD
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period1 ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1	P3Y
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	-59712	shares
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	590098	shares
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	53.71
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.0508
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.2296
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.0291
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	11500000	shares
CY2011Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	2764670	shares
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	1192670	shares
CY2011Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	41.25
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	41.86
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber	332026	shares
CY2012	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	40.78
CY2012	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	42.02
CY2012	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	0
CY2012Q4	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Outstanding Options ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions	1192670	shares
CY2012Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	240000000	USD
CY2011Q4	us-gaap	Short Term Debt Weighted Average Interest Rate ShortTermDebtWeightedAverageInterestRate	0.005
CY2012Q4	us-gaap	Short Term Debt Weighted Average Interest Rate ShortTermDebtWeightedAverageInterestRate	0.004
CY2012Q4	us-gaap	Significant Change In Unrecognized Tax Benefits Is Reasonably Possible Amount Of Unrecorded Benefit SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit	1000000	USD
CY2010	us-gaap	Stock Option Plan Expense StockOptionPlanExpense	4000000	USD
CY2011	us-gaap	Stock Option Plan Expense StockOptionPlanExpense	2000000	USD
CY2012	us-gaap	Stock Option Plan Expense StockOptionPlanExpense	700000	USD
CY2012Q4	us-gaap	Stockholders Equity StockholdersEquity	7373000000	USD
CY2011Q4	us-gaap	Stockholders Equity StockholdersEquity	7009000000	USD
CY2011Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	7053000000	USD
CY2012Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	7411000000	USD
CY2012Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued	0	USD
CY2012Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	1000000	USD
CY2010Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	2000000	USD
CY2010	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Expense UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense	1000000	USD
CY2011Q4	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	597000000	USD
CY2012	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	79000000	USD
CY2011	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	310000000	USD
CY2012	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	332000000	USD
CY2010	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	306000000	USD
CY2010	us-gaap	Trading Securities Unrealized Holding Gain Loss TradingSecuritiesUnrealizedHoldingGainLoss	7000000	USD
CY2011	us-gaap	Trading Securities Unrealized Holding Gain Loss TradingSecuritiesUnrealizedHoldingGainLoss	3000000	USD
CY2012	us-gaap	Trading Securities Unrealized Holding Gain Loss TradingSecuritiesUnrealizedHoldingGainLoss	9000000	USD
CY2012Q4	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	686000000	USD
CY2012	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Expense UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense	-1000000	USD
CY2011	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Expense UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense	-2000000	USD
CY2012Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	3000000	USD
CY2010Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	4000000	USD
CY2010	us-gaap	Utilities Operating Expense Maintenance And Operations UtilitiesOperatingExpenseMaintenanceAndOperations	2567000000	USD
CY2012	us-gaap	Utilities Operating Expense Maintenance And Operations UtilitiesOperatingExpenseMaintenanceAndOperations	2892000000	USD
CY2011	us-gaap	Utilities Operating Expense Maintenance And Operations UtilitiesOperatingExpenseMaintenanceAndOperations	2612000000	USD
CY2012Q4	us-gaap	Valuation Allowance Amount ValuationAllowanceAmount	33000000	USD
CY2010Q4	us-gaap	Valuation Allowance Amount ValuationAllowanceAmount	27000000	USD
CY2010	us-gaap	Valuation Allowances And Reserves Adjustments ValuationAllowancesAndReservesAdjustments	5000000	USD
CY2012	us-gaap	Valuation Allowances And Reserves Adjustments ValuationAllowancesAndReservesAdjustments	-1000000	USD
CY2011	us-gaap	Valuation Allowances And Reserves Adjustments ValuationAllowancesAndReservesAdjustments	21000000	USD
CY2011	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	94000000	USD
CY2010	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	113000000	USD
CY2011	us-gaap	Valuation Allowances And Reserves Charged To Other Accounts ValuationAllowancesAndReservesChargedToOtherAccounts	18000000	USD
CY2012	us-gaap	Valuation Allowances And Reserves Charged To Other Accounts ValuationAllowancesAndReservesChargedToOtherAccounts	16000000	USD
CY2010	us-gaap	Valuation Allowances And Reserves Charged To Other Accounts ValuationAllowancesAndReservesChargedToOtherAccounts	20000000	USD
CY2010	us-gaap	Valuation Allowances And Reserves Deductions ValuationAllowancesAndReservesDeductions	-199000000	USD
CY2012	us-gaap	Valuation Allowances And Reserves Deductions ValuationAllowancesAndReservesDeductions	-195000000	USD
CY2011	us-gaap	Valuation Allowances And Reserves Deductions ValuationAllowancesAndReservesDeductions	-146000000	USD
CY2011	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	170000000	shares
CY2012	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	172000000	shares
CY2010	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	169000000	shares
CY2011	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	169000000	shares
CY2012	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	171000000	shares
CY2010	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	168000000	shares
CY2012	us-gaap	Weighted Average Number Of Shares Restricted Stock WeightedAverageNumberOfSharesRestrictedStock	1000000	shares
CY2010	us-gaap	Weighted Average Number Of Shares Restricted Stock WeightedAverageNumberOfSharesRestrictedStock	1000000	shares
CY2011	us-gaap	Weighted Average Number Of Shares Restricted Stock WeightedAverageNumberOfSharesRestrictedStock	1000000	shares
CY2010Q2	dte	After Tax Amount Of Cost To Achieve Previously Expensed Deferred And Recognized In Income AfterTaxAmountOfCostToAchievePreviouslyExpensedDeferredAndRecognizedInIncome	20000000	USD
CY2012	dte	Aggregate Limit Of Liabilities Arises From Terroist Act Outside Scope Of Trials Subject To One Industry AggregateLimitOfLiabilitiesArisesFromTerroistActOutsideScopeOfTrialsSubjectToOneIndustry	300000000	USD
CY2012Q4	dte	Allocation Of Company Contributions In Lieu Of Post Employment Health Care Benefits AllocationOfCompanyContributionsInLieuOfPostEmploymentHealthCareBenefits	4000	USD
CY2012	dte	Allocation Of Corporate Interest Costs AllocationOfCorporateInterestCosts	0	USD
CY2012Q4	dte	Allocation Of Purchase Price To Existing Contracts And Agreements AllocationOfPurchasePriceToExistingContractsAndAgreements	75000000	USD
CY2012	dte	Amortization Period For Enterprise Business Systems AmortizationPeriodForEnterpriseBusinessSystems	P10Y
CY2012	dte	Amortization Period Of Cost To Achieve Deferral AmortizationPeriodOfCostToAchieveDeferral	P10Y
CY2012	dte	Amortization Period Of Cta AmortizationPeriodOfCta	P10Y
CY2012	dte	Amortization Years For Intangible Assets Acquired In Business Combination AmortizationYearsForIntangibleAssetsAcquiredInBusinessCombination	P8Y
CY2012	dte	Amount Per Event Loss Associated With Nuclear Power Plants AmountPerEventLossAssociatedWithNuclearPowerPlants	31000000	USD
CY2010	dte	Amounts Reclassified To Benefit Obligations Related To Consolidation Of Variable Interest Entities AmountsReclassifiedToBenefitObligationsRelatedToConsolidationOfVariableInterestEntities	10000000	USD
CY2012	dte	Amounts Reclassified To Benefit Obligations Related To Consolidation Of Variable Interest Entities AmountsReclassifiedToBenefitObligationsRelatedToConsolidationOfVariableInterestEntities	0	USD
CY2011	dte	Amounts Reclassified To Benefit Obligations Related To Consolidation Of Variable Interest Entities AmountsReclassifiedToBenefitObligationsRelatedToConsolidationOfVariableInterestEntities	0	USD
CY2011	dte	Amounts Reclassified To Benefit Obligations Related To Consolidation Of Variable Interest Entities1 AmountsReclassifiedToBenefitObligationsRelatedToConsolidationOfVariableInterestEntities1	0	USD
CY2012	dte	Average Maturity Of Debt Securities AverageMaturityOfDebtSecurities	P6Y
CY2010	dte	Benefit Obligations Net Of Tax BenefitObligationsNetOfTax	5000000	USD
CY2012	dte	Benefit Obligations Net Of Tax BenefitObligationsNetOfTax	-2000000	USD
CY2011	dte	Benefit Obligations Net Of Tax BenefitObligationsNetOfTax	-9000000	USD
CY2012Q4	dte	Borrowing Capacity Under Financing Agreement With Its Clearing Agent BorrowingCapacityUnderFinancingAgreementWithItsClearingAgent	100000000	USD
CY2010	dte	Amounts Reclassified To Benefit Obligations Related To Consolidation Of Variable Interest Entities1 AmountsReclassifiedToBenefitObligationsRelatedToConsolidationOfVariableInterestEntities1	10000000	USD
CY2012	dte	Amounts Reclassified To Benefit Obligations Related To Consolidation Of Variable Interest Entities1 AmountsReclassifiedToBenefitObligationsRelatedToConsolidationOfVariableInterestEntities1	0	USD
CY2012Q4	dte	Company Retiree New Coverage After Certain Date Maximum CompanyRetireeNewCoverageAfterCertainDateMaximum	4000	USD
CY2011	dte	Average Maturity Of Debt Securities AverageMaturityOfDebtSecurities	P7Y
CY2012	dte	Capital Expenditures Over Next Few Years CapitalExpendituresOverNextFewYears	17000000	USD
CY2012	dte	Capitalized Computer Software Future Amortization Expense CapitalizedComputerSoftwareFutureAmortizationExpense	46000000	USD
CY2011Q4	dte	Cash Collateral Paid CashCollateralPaid	16000000	USD
CY2012Q4	dte	Cash Collateral Paid CashCollateralPaid	4000000	USD
CY2011Q4	dte	Cash Collateral Paid Or Received For Derivative Assets CashCollateralPaidOrReceivedForDerivativeAssets	19000000	USD
CY2012Q4	dte	Cash Collateral Paid Or Received For Derivative Assets Or Derivative Liabilities CashCollateralPaidOrReceivedForDerivativeAssetsOrDerivativeLiabilities	0	USD
CY2011Q4	dte	Cash Collateral Paid Or Received For Derivative Liabilities CashCollateralPaidOrReceivedForDerivativeLiabilities	74000000	USD
CY2012Q4	dte	Cash Collateral Received CashCollateralReceived	24000000	USD
CY2011	dte	Change In Capital Expenditures Not Paid ChangeInCapitalExpendituresNotPaid	76000000	USD
CY2012	dte	Change In Capital Expenditures Not Paid ChangeInCapitalExpendituresNotPaid	23000000	USD
CY2010	dte	Change In Capital Expenditures Not Paid ChangeInCapitalExpendituresNotPaid	20000000	USD
CY2010	dte	Charitable Contributions To Foundation CharitableContributionsToFoundation	14000000	USD
CY2011	dte	Charitable Contributions To Foundation CharitableContributionsToFoundation	21000000	USD
CY2012	dte	Charitable Contributions To Foundation CharitableContributionsToFoundation	21000000	USD
CY2012	dte	Combined Coverage Limit For Total Property Damage CombinedCoverageLimitForTotalPropertyDamage	2750000000	USD
CY2011	dte	Common Stock Issued For Employee Benefit Plans CommonStockIssuedForEmployeeBenefitPlans	1000000	USD
CY2012	dte	Common Stock Issued For Employee Benefit Plans CommonStockIssuedForEmployeeBenefitPlans	114000000	USD
CY2010	dte	Common Stock Issued For Employee Benefit Plans CommonStockIssuedForEmployeeBenefitPlans	156000000	USD
CY2012Q4	dte	Company Contribution To Employee Savings Plan CompanyContributionToEmployeeSavingsPlan	0.04
CY2012	dte	Company Obligated To Pay Doe Fee Of Fermi2 Electricity Generated And Sold CompanyObligatedToPayDoeFeeOfFermi2ElectricityGeneratedAndSold	1	kWh
CY2012Q4	dte	Company Retiree New Coverage Maximum CompanyRetireeNewCoverageMaximum	3500	USD
CY2012Q4	dte	Company Retiree New Coverage Minimum CompanyRetireeNewCoverageMinimum	3250	USD
CY2012Q4	dte	Company Will Pay Fine To Epa To Settle Air And Water Issues CompanyWillPayFineToEpaToSettleAirAndWaterIssues	1750000	USD
CY2011Q2	dte	Consistnet With Orginal Treatment Of Deferred Tax Liabilities No Cash Flow Impact ConsistnetWithOrginalTreatmentOfDeferredTaxLiabilitiesNoCashFlowImpact	0	USD
CY2010	dte	Consolidation Of Vies ConsolidationOfVies	19000000	USD
CY2012	dte	Consolidation Of Vies ConsolidationOfVies	0	USD
CY2011	dte	Consolidation Of Vies ConsolidationOfVies	0	USD
CY2011	dte	Contribution Of Common Stock To Pension Plan Value ContributionOfCommonStockToPensionPlanValue	100000000	USD
CY2012	dte	Contribution Of Common Stock To Pension Plan Value ContributionOfCommonStockToPensionPlanValue	80000000	USD
CY2012	dte	Coverage For Stabilization Decontamination Debris Removal Repair And Replacement Of Property And Decommissioning CoverageForStabilizationDecontaminationDebrisRemovalRepairAndReplacementOfPropertyAndDecommissioning	2250000000	USD
CY2012	dte	Days To Contrbute Common Stock To Pension Plan DaysToContrbuteCommonStockToPensionPlan	P4D
CY2012Q4	dte	Decommissioning Expenses Current DecommissioningExpensesCurrent	1500000000	USD
CY2011Q2	dte	Decrease In Deferred Tax Liabilities Attributaable To Regulated Utilities DecreaseInDeferredTaxLiabilitiesAttributaableToRegulatedUtilities	395000000	USD
CY2012	dte	Deferral Of Investigation And Remediation Of Costs Associated With Gas Utilities Former Mgp Sites DeferralOfInvestigationAndRemediationOfCostsAssociatedWithGasUtilitiesFormerMgpSites	P10Y
CY2012	dte	Deferred Premium Charged Leviied Against Each Licensed Nuclear Facility DeferredPremiumChargedLeviiedAgainstEachLicensedNuclearFacility	117500000	USD
CY2010Q4	dte	Deferred Tax Assets Liabilities Derivative DeferredTaxAssetsLiabilitiesDerivative	64000000	USD
CY2012Q4	dte	Deferred Tax Assets Liabilities Derivative DeferredTaxAssetsLiabilitiesDerivative	66000000	USD
CY2010Q4	dte	Deferred Tax Assets Liabilities Gross DeferredTaxAssetsLiabilitiesGross	3038000000	USD
CY2012Q4	dte	Deferred Tax Assets Liabilities Gross DeferredTaxAssetsLiabilitiesGross	3137000000	USD
CY2012Q4	dte	Deferred Tax Assets Merger Basis Differences DeferredTaxAssetsMergerBasisDifferences	42000000	USD
CY2010Q4	dte	Deferred Tax Assets Merger Basis Differences DeferredTaxAssetsMergerBasisDifferences	50000000	USD
CY2012Q4	dte	Deferred Tax Assets State Net Operating Loss And Credit Carry Forwards DeferredTaxAssetsStateNetOperatingLossAndCreditCarryForwards	37000000	USD
CY2010Q4	dte	Deferred Tax Assets State Net Operating Loss And Credit Carry Forwards DeferredTaxAssetsStateNetOperatingLossAndCreditCarryForwards	30000000	USD
CY2010Q4	dte	Deferred Tax Assets State Net Operating Loss And Credit Carry Forwards1 DeferredTaxAssetsStateNetOperatingLossAndCreditCarryForwards1	30000000	USD
CY2012Q4	dte	Deferred Tax Assets State Net Operating Loss And Credit Carry Forwards1 DeferredTaxAssetsStateNetOperatingLossAndCreditCarryForwards1	37000000	USD
CY2010Q2	dte	Deferred Tax Liabilities Attributable To Regulated Utilities DeferredTaxLiabilitiesAttributableToRegulatedUtilities	36000000	USD
CY2012	dte	Defined Benefit Plan Effect Of One Percentage Point Increase On Service And Interest DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnServiceAndInterest	28000000	USD
CY2012	dte	Defined Benefit Plan Effect Of One Percentage Point On Post Retirement Obligation DefinedBenefitPlanEffectOfOnePercentagePointOnPostRetirementObligation	264000000	USD
CY2012Q4	dte	Disposal Of Equity Interest In Segment Percentage DisposalOfEquityInterestInSegmentPercentage	1.00
CY2011	dte	Dividends Declared Common Shares DividendsDeclaredCommonShares	392000000	USD
CY2012	dte	Dividends Declared Common Shares DividendsDeclaredCommonShares	413000000	USD
CY2010	dte	Dividends Declared Common Shares DividendsDeclaredCommonShares	365000000	USD
CY2011Q4	dte	Dividends Payable Fair Value Disclosure DividendsPayableFairValueDisclosure	99000000	USD
CY2012	dte	Earnings Of Acquired Business Included In Companys Consolidated Statements Of Operations EarningsOfAcquiredBusinessIncludedInCompanysConsolidatedStatementsOfOperations	2000000	USD
CY2012	dte	Enactment Of Michigan Corporate Income Tax Net Of Federal Expense EnactmentOfMichiganCorporateIncomeTaxNetOfFederalExpense	0	USD
CY2010	dte	Enactment Of Michigan Corporate Income Tax Net Of Federal Expense EnactmentOfMichiganCorporateIncomeTaxNetOfFederalExpense	0	USD
CY2011	dte	Enactment Of Michigan Corporate Income Tax Net Of Federal Expense EnactmentOfMichiganCorporateIncomeTaxNetOfFederalExpense	-87000000	USD
CY2012Q4	dte	Enforcement Actions Initiated By Mdeq For Opacity Exceedances EnforcementActionsInitiatedByMdeqForOpacityExceedances	0
CY2012Q4	dte	Epa Is Alleging Detroit Edison Power Plants Violated New Source Performance Standards EpaIsAllegingDetroitEdisonPowerPlantsViolatedNewSourcePerformanceStandards	5	facilities
CY2012Q4	dte	Epa Sulfur Dioxide Ambient Air Quality Standard EpaSulfurDioxideAmbientAirQualityStandard	1
CY2012	dte	Fair Value Measurements With Unobservable Inputs Reconciliation Gains And Loses Recorded In Regulatory Assets Liabilities FairValueMeasurementsWithUnobservableInputsReconciliationGainsAndLosesRecordedInRegulatoryAssetsLiabilities	15000000	USD
CY2012	dte	Eps Net Income Less Distributed Earnings EpsNetIncomeLessDistributedEarnings	196000000	USD
CY2011	dte	Eps Net Income Less Distributed Earnings EpsNetIncomeLessDistributedEarnings	318000000	USD
CY2010	dte	Eps Net Income Less Distributed Earnings EpsNetIncomeLessDistributedEarnings	263000000	USD
CY2012	dte	Estimated Amount Of Amortization EstimatedAmountOfAmortization	13000000	USD
CY2012Q4	dte	Estimated Future Capital Expenditures For Next Year EstimatedFutureCapitalExpendituresForNextYear	2200000000	USD
CY2012	dte	Excise Sales Tax Net Impact On Statement Of Operations ExciseSalesTaxNetImpactOnStatementOfOperations	0	USD
CY2011Q4	dte	Expense Related To Refueling Outages ExpenseRelatedToRefuelingOutages	23000000	USD
CY2012Q4	dte	Expense Related To Refueling Outages ExpenseRelatedToRefuelingOutages	12000000	USD
CY2012	dte	Expiration Period After Date Of Grant ExpirationPeriodAfterDateOfGrant	P10Y
CY2012	dte	Exposure Loss Related To Debt Assumed ExposureLossRelatedToDebtAssumed	0	USD
CY2011	dte	Fair Value Measurements With Unobservable Inputs Reconciliation Gains And Loses Recorded In Regulatory Assets Liabilities FairValueMeasurementsWithUnobservableInputsReconciliationGainsAndLosesRecordedInRegulatoryAssetsLiabilities	2000000	USD
CY2011Q4	dte	Fair Value Of Cash Equivalents Included In Other Investments FairValueOfCashEquivalentsIncludedInOtherInvestments	16000000	USD
CY2012Q4	dte	Fair Value Of Cash Equivalents Included In Other Investments FairValueOfCashEquivalentsIncludedInOtherInvestments	14000000	USD
CY2012Q4	dte	Fair Value Of Cash Equivalents Included In Restricted Cash FairValueOfCashEquivalentsIncludedInRestrictedCash	109000000	USD
CY2011Q4	dte	Fair Value Of Cash Equivalents Included In Restricted Cash FairValueOfCashEquivalentsIncludedInRestrictedCash	124000000	USD
CY2012Q4	dte	Fermi I Corresponding Regulatory Asset Treatment FermiICorrespondingRegulatoryAssetTreatment	0	USD
CY2012Q4	dte	Grantor Trust Balance GrantorTrustBalance	14000000	USD
CY2012Q4	dte	Guarantee Obligations Maximum Exposure One GuaranteeObligationsMaximumExposureOne	50000000	USD
CY2012Q4	dte	Health Care Trend Decrease In Percentage Point HealthCareTrendDecreaseInPercentagePoint	0
CY2012Q4	dte	Health Care Trend Increase In Percentage Point HealthCareTrendIncreaseInPercentagePoint	0
CY2011Q2	dte	Income Tax Benefit IncomeTaxBenefit	87000000	USD
CY2011	dte	Income Tax Benefit For Discontinued Operations IncomeTaxBenefitForDiscontinuedOperations	-1000000	USD
CY2012	dte	Income Tax Benefit For Discontinued Operations IncomeTaxBenefitForDiscontinuedOperations	-29000000	USD
CY2010	dte	Income Tax Benefit For Discontinued Operations IncomeTaxBenefitForDiscontinuedOperations	-4000000	USD
CY2012	dte	Increase Decrease In Recoverable Pension And Postretirement Costs IncreaseDecreaseInRecoverablePensionAndPostretirementCosts	141000000	USD
CY2010	dte	Increase Decrease In Recoverable Pension And Postretirement Costs IncreaseDecreaseInRecoverablePensionAndPostretirementCosts	-32000000	USD
CY2011	dte	Increase Decrease In Recoverable Pension And Postretirement Costs IncreaseDecreaseInRecoverablePensionAndPostretirementCosts	-620000000	USD
CY2012Q4	dte	Inflation Rate Used To Determine Estimated Decommissioning Expenditures InflationRateUsedToDetermineEstimatedDecommissioningExpenditures	0.06
CY2012	dte	Insurance Coverage For Extra Expensewhen To Necessitate Power Plant When Unavailable InsuranceCoverageForExtraExpensewhenToNecessitatePowerPlantWhenUnavailable	490000000	USD
CY2012Q4	dte	Insurance Deductible For Nuclear Power Plant InsuranceDeductibleForNuclearPowerPlant	1000000	USD
CY2012Q4	dte	Intangible Assets Emission Allowance IntangibleAssetsEmissionAllowance	6000000	USD
CY2011Q4	dte	Intangible Assets Emission Allowance IntangibleAssetsEmissionAllowance	10000000	USD
CY2012Q4	dte	Intangible Assets Renewable Energy Credits IntangibleAssetsRenewableEnergyCredits	44000000	USD
CY2011Q4	dte	Intangible Assets Renewable Energy Credits IntangibleAssetsRenewableEnergyCredits	39000000	USD
CY2012	dte	Jointly Owned Utility Plant Number Of Plants JointlyOwnedUtilityPlantNumberOfPlants	2	facilities
CY2012Q4	dte	Liabilities Balance Upon Completion Of Decommissioning LiabilitiesBalanceUponCompletionOfDecommissioning	0	USD
CY2012	dte	Liability Recorded For Non Estimatable Values Of Assets Related To Aro LiabilityRecordedForNonEstimatableValuesOfAssetsRelatedToAro	0	USD
CY2012	dte	Limit Deferred Premium Charges Per Year LimitDeferredPremiumChargesPerYear	17500000	USD
CY2012	dte	Limitations With Respect Of Companys Ability To Pay Dividends LimitationsWithRespectOfCompanysAbilityToPayDividends	0	USD
CY2012Q4	dte	Line Of Credit Facility Current Borrowing LineOfCreditFacilityCurrentBorrowing	140000000	USD
CY2012Q4	dte	Long Term Debt Maturities Repayment Of Principal LongTermDebtMaturitiesRepaymentOfPrincipal	7818000000	USD
CY2012	dte	Maintenance Of Public Liability Insurance For Nuclear Power Plants MaintenanceOfPublicLiabilityInsuranceForNuclearPowerPlants	375000000	USD
CY2012	dte	Maturities On Temporary Investments MaturitiesOnTemporaryInvestments	P3M
CY2012	dte	Maturity In Years For Cash And Cash Equivalents MaturityInYearsForCashAndCashEquivalents	P3M
CY2012Q4	dte	Maximum Additional Margin Financing MaximumAdditionalMarginFinancing	50000000	USD
CY2012Q4	dte	Maximum Percentage Of Commitment To Bank In Any Facility MaximumPercentageOfCommitmentToBankInAnyFacility	0.085
CY2012Q4	dte	Maximum Total Funded Debt To Total Capitalization Ratio MaximumTotalFundedDebtToTotalCapitalizationRatio	0.65
CY2012Q4	dte	Maximum Total Funded Debt To Total Capitilization Ration Denominator MaximumTotalFundedDebtToTotalCapitilizationRationDenominator	1
CY2011Q2	dte	Michigan Corporate Income Tax MichiganCorporateIncomeTax	0.06
CY2012	dte	Neil Policies Against Terroism Loss NeilPoliciesAgainstTerroismLoss	3200000000	USD
CY2012Q4	dte	Non Vested Stock Options NonVestedStockOptions	200844	shares
CY2012	dte	Notes Receivable Considered Delinquent Maximum Due Date NotesReceivableConsideredDelinquentMaximumDueDate	P120D
CY2012	dte	Notes Receivable Considered Delinquent Minimum Due Date NotesReceivableConsideredDelinquentMinimumDueDate	P60D
CY2011Q4	dte	Notes Receivable Excudling Capital Leases NotesReceivableExcudlingCapitalLeases	48000000	USD
CY2012Q4	dte	Notes Receivable Excudling Capital Leases NotesReceivableExcudlingCapitalLeases	39000000	USD
CY2012Q4	dte	Nuclear Decommissioning Liabilities Funded Through Surcharge And Included In Aro Balance NuclearDecommissioningLiabilitiesFundedThroughSurchargeAndIncludedInAroBalance	1500000000	USD
CY2012Q4	dte	Number Of Acquired Businesss Are Vies Parent Is Not Primary Beneficiary NumberOfAcquiredBusinesssAreViesParentIsNotPrimaryBeneficiary	2	facilities
CY2012Q4	dte	Number Of Acres Included In Sale Of Segment NumberOfAcresIncludedInSaleOfSegment	88000	acre
CY2012Q4	dte	Number Of Banks That Provide Percentage Of Commitment In Any Facility NumberOfBanksThatProvidePercentageOfCommitmentInAnyFacility	1	banks
CY2012Q4	dte	Number Of Categories Of Activities Represented By Their Operating Characteristics And Key Risks NumberOfCategoriesOfActivitiesRepresentedByTheirOperatingCharacteristicsAndKeyRisks	4
CY2012Q4	dte	Number Of Certain Forward Market And Basis Prices Used NumberOfCertainForwardMarketAndBasisPricesUsed	2
CY2012Q4	dte	Number Of Citizens Gas Customers NumberOfCitizensGasCustomers	17000	customers
CY2012	dte	Number Of Days In Year NumberOfDaysInYear	P365D
CY2012Q4	dte	Number Of Gas Utility Customers NumberOfGasUtilityCustomers	1200000	customers
CY2012Q4	dte	Number Of Electric Utility Customers NumberOfElectricUtilityCustomers	2100000	customers
CY2012Q4	dte	Number Of Options To Regulate Coal Ash Residue NumberOfOptionsToRegulateCoalAshResidue	2
CY2012Q4	dte	Number Of Parties That Appealed Coa Decision Regarding Rdm NumberOfPartiesThatAppealedCoaDecisionRegardingRdm	0	people
CY2012Q4	dte	Number Of Represented Employees NumberOfRepresentedEmployees	4900	employees
CY2012	dte	Options Exercised Shares OptionsExercisedShares	-1555227	shares
CY2012	dte	Other Comprehensive Income Loss Unrealized Gain Loss On Derivativesnet Of Tax OtherComprehensiveIncomeLossUnrealizedGainLossOnDerivativesnetOfTax	0	USD
CY2011	dte	Other Comprehensive Income Loss Unrealized Gain Loss On Derivativesnet Of Tax OtherComprehensiveIncomeLossUnrealizedGainLossOnDerivativesnetOfTax	0	USD
CY2010	dte	Other Comprehensive Income Loss Unrealized Gain Loss On Derivativesnet Of Tax OtherComprehensiveIncomeLossUnrealizedGainLossOnDerivativesnetOfTax	1000000	USD
CY2012	dte	Other Comprehensive Income Loss Unrealized Holding Gain Loss Net Of Tax OtherComprehensiveIncomeLossUnrealizedHoldingGainLossNetOfTax	-1000000	USD
CY2011	dte	Other Comprehensive Income Loss Unrealized Holding Gain Loss Net Of Tax OtherComprehensiveIncomeLossUnrealizedHoldingGainLossNetOfTax	0	USD
CY2010	dte	Other Comprehensive Income Loss Unrealized Holding Gain Loss Net Of Tax OtherComprehensiveIncomeLossUnrealizedHoldingGainLossNetOfTax	10000000	USD
CY2012Q4	dte	Ownership Interest With Lessee OwnershipInterestWithLessee	0.40
CY2012Q4	dte	Performance Bonds Outstanding PerformanceBondsOutstanding	41000000	USD
CY2011Q4	dte	Performance Share Awards Outstanding Shares PerformanceShareAwardsOutstandingShares	1608733	shares
CY2012Q4	dte	Performance Share Awards Outstanding Shares PerformanceShareAwardsOutstandingShares	1634364	shares
CY2012	dte	Performance Units PerformanceUnits	1000000	performance
CY2012	dte	Performance Units Price Per Unit PerformanceUnitsPricePerUnit	1.00
CY2012	dte	Period Expenses Related To Refueling Outages Are Accrued PeriodExpensesRelatedToRefuelingOutagesAreAccrued	P18M
CY2012	dte	Period For Extension Of Renewal Options Of Capital Lease Contract PeriodForExtensionOfRenewalOptionsOfCapitalLeaseContract	P5Y
CY2012	dte	Period For Extension Of Renewal Options Of Capital Lease Contract2 PeriodForExtensionOfRenewalOptionsOfCapitalLeaseContract2	P5Y
CY2012	dte	Period For Extenstion Of Renewal Options Of Capital Lease Contract1 PeriodForExtenstionOfRenewalOptionsOfCapitalLeaseContract1	P3Y
CY2012	dte	Period Gas Utility Can Amortize Mgp Costs PeriodGasUtilityCanAmortizeMgpCosts	P10Y
CY2012	dte	Period Of Acquired Project Companies Following Colsing PeriodOfAcquiredProjectCompaniesFollowingColsing	P3M
CY2012	dte	Period Of Coverage Of Policy For Extra Expenses PeriodOfCoverageOfPolicyForExtraExpenses	P3Y
CY2012	dte	Plant And Equipment Expenditures Non Utility PlantAndEquipmentExpendituresNonUtility	369000000	USD
CY2010	dte	Plant And Equipment Expenditures Non Utility PlantAndEquipmentExpendituresNonUtility	88000000	USD
CY2011	dte	Plant And Equipment Expenditures Non Utility PlantAndEquipmentExpendituresNonUtility	102000000	USD
CY2012	dte	Plant And Equipment Expenditures Utility PlantAndEquipmentExpendituresUtility	1451000000	USD
CY2010	dte	Plant And Equipment Expenditures Utility PlantAndEquipmentExpendituresUtility	1011000000	USD
CY2011	dte	Plant And Equipment Expenditures Utility PlantAndEquipmentExpendituresUtility	1382000000	USD
CY2012	dte	Possible Environmental Capital Expenditures To Comply With Requirements PossibleEnvironmentalCapitalExpendituresToComplyWithRequirements	6000000	USD
CY2010Q2	dte	Pre Tax Amount Of Cost To Achieve Previously Expensed Deferred And Recognized In Income PreTaxAmountOfCostToAchievePreviouslyExpensedDeferredAndRecognizedInIncome	32000000	USD
CY2012	dte	Primary Coverage PrimaryCoverage	500000000	USD
CY2012	dte	Probability Of Recovery Through Regulatory Rates For Regulatory Assets And Liabilities ProbabilityOfRecoveryThroughRegulatoryRatesForRegulatoryAssetsAndLiabilities	0	USD
CY2012Q4	dte	Production Tax Credits Earned In Prior Years But Not Utilized Carried Forward Indefinitely As Alternative Minimum Tax Credits ProductionTaxCreditsEarnedInPriorYearsButNotUtilizedCarriedForwardIndefinitelyAsAlternativeMinimumTaxCredits	254000000	USD
CY2011Q4	dte	Property Plant And Equipment Accumulated Depreciation Nonutility And Other PropertyPlantAndEquipmentAccumulatedDepreciationNonutilityAndOther	-688000000	USD
CY2012Q4	dte	Property Plant And Equipment Accumulated Depreciation Nonutility And Other PropertyPlantAndEquipmentAccumulatedDepreciationNonutilityAndOther	-659000000	USD
CY2012	dte	Proposed Extension Of Nuclear Plant2 License ProposedExtensionOfNuclearPlant2License	P20Y
CY2012	dte	Rdm Cap For Second Period Reconciliation RdmCapForSecondPeriodReconciliation	0.0225
CY2012	dte	Rdm Caps For First Reconciliation Period RdmCapsForFirstReconciliationPeriod	0.01125
CY2012	dte	Re Proposed Regulations Will Provide Minimum Period For Compliance ReProposedRegulationsWillProvideMinimumPeriodForCompliance	P3Y
CY2012	dte	Receivables Due Date ReceivablesDueDate	P21D
CY2011Q2	dte	Reduction Of Net Deferred Tax Assets ReductionOfNetDeferredTaxAssets	0	USD
CY2011Q2	dte	Reduction Of Net Deferred Tax Assets1 ReductionOfNetDeferredTaxAssets1	308000000	USD
CY2011	dte	Requested Net Recovery Of Retm And Lct RequestedNetRecoveryOfRetmAndLct	44000000	USD
CY2012Q1	dte	Requesting Authority To Refund Uncollectible Expense To Customers RequestingAuthorityToRefundUncollectibleExpenseToCustomers	9000000	USD
	dte	Reserve And Impairment Of Retirement Obligation ReserveAndImpairmentOfRetirementObligation	6000000	USD
CY2012	dte	Restricted Cash Time Period To Be Classified As Current RestrictedCashTimePeriodToBeClassifiedAsCurrent	P1Y
CY2012	dte	Restricted Stock Award Activity Forfeitures RestrictedStockAwardActivityForfeitures	-37767	shares
CY2012	dte	Restricted Stock Award Activity Vested And Issued RestrictedStockAwardActivityVestedAndIssued	-258129	shares
CY2012	dte	Restricted Stock Award Activity Vested And Isued Weighted Average Fair Value Per Share RestrictedStockAwardActivityVestedAndIsuedWeightedAverageFairValuePerShare	34.41
CY2012	dte	Restricted Stock Awards Activity Forfeitures Weighted Average Fair Value Per Share RestrictedStockAwardsActivityForfeituresWeightedAverageFairValuePerShare	48.46
CY2012	dte	Restricted Stock Awards Activity Shares Granted RestrictedStockAwardsActivitySharesGranted	167320	shares
CY2012Q4	dte	Restricted Stock Awards Outstanding Shares RestrictedStockAwardsOutstandingShares	597648	shares
CY2011Q4	dte	Restricted Stock Awards Outstanding Shares RestrictedStockAwardsOutstandingShares	726224	shares
CY2012	dte	Revenues Of Acquired Business Included In Companys Consolidated Statement Of Operations RevenuesOfAcquiredBusinessIncludedInCompanysConsolidatedStatementOfOperations	30000000	USD
CY2012Q4	dte	Revolving Credit Facilities With Syndicate Number Of Banks RevolvingCreditFacilitiesWithSyndicateNumberOfBanks	20	banks
CY2012Q4	dte	Settlement Provided For Delay Related Costs SettlementProvidedForDelayRelatedCosts	48000000	USD
CY2012	dte	Share Based Compensation Arrangements Other Than Options Payout In Period ShareBasedCompensationArrangementsOtherThanOptionsPayoutInPeriod	-504755	shares
CY2012Q4	dte	Significant Potential Exposure To Loss Due To Vie Long Term Purchase Contracts SignificantPotentialExposureToLossDueToVieLongTermPurchaseContracts	0	USD
CY2012	dte	Specific Review Of Probable Future Collections Based On Receivable Balances In Excess Of90 Days SpecificReviewOfProbableFutureCollectionsBasedOnReceivableBalancesInExcessOf90Days	P30D
CY2010	dte	State And Local Income Taxes Net Of Federal Benefit StateAndLocalIncomeTaxesNetOfFederalBenefit	44000000	USD
CY2011	dte	State And Local Income Taxes Net Of Federal Benefit StateAndLocalIncomeTaxesNetOfFederalBenefit	37000000	USD
CY2012	dte	State And Local Income Taxes Net Of Federal Benefit StateAndLocalIncomeTaxesNetOfFederalBenefit	37000000	USD
CY2012	dte	Time Period Customer Accounts Are Written Off After Service Termination TimePeriodCustomerAccountsAreWrittenOffAfterServiceTermination	P150D
CY2012	dte	Time Period For Maximum Assessments For Losses Associated To Events At Nuclear Plants TimePeriodForMaximumAssessmentsForLossesAssociatedToEventsAtNuclearPlants	P1Y
CY2012	dte	Time Period For Mbt Deferred Tax Asset TimePeriodForMbtDeferredTaxAsset	P1Y
CY2012	dte	Time Period For Tria Insurance After First Loss From Terrorism TimePeriodForTriaInsuranceAfterFirstLossFromTerrorism	P1Y
CY2012	dte	Time Period For Vesting Of Allocation Of Company Contributions In Lieu Of Post Employment Health Care Benefits TimePeriodForVestingOfAllocationOfCompanyContributionsInLieuOfPostEmploymentHealthCareBenefits	P10Y
CY2012	dte	Time Period Of Unrecognized Tax Benefits That Would Impact Effective Tax Rate TimePeriodOfUnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	P12M
CY2012	dte	Time Period Required By Non Bypassable Securitization Bond Surcharge To Recover Securitized Regulatory Asset TimePeriodRequiredByNonBypassableSecuritizationBondSurchargeToRecoverSecuritizedRegulatoryAsset	P14Y
CY2010	dte	Total Comprehensive Income Net Of Tax TotalComprehensiveIncomeNetOfTax	637000000	USD
CY2011	dte	Total Comprehensive Income Net Of Tax TotalComprehensiveIncomeNetOfTax	711000000	USD
CY2012	dte	Total Comprehensive Income Net Of Tax TotalComprehensiveIncomeNetOfTax	618000000	USD
CY2012	dte	Uetm Accrual For Over Recovery UetmAccrualForOverRecovery	20000000	USD
CY2012	dte	Unrealized Losses On Available For Sale Securities UnrealizedLossesOnAvailableForSaleSecurities	0	USD
CY2011Q4	dte	Unrealized Losses Recognized As Regulatory Assets UnrealizedLossesRecognizedAsRegulatoryAssets	67000000	USD
CY2012Q4	dte	Unrealized Losses Recognized As Regulatory Assets UnrealizedLossesRecognizedAsRegulatoryAssets	44000000	USD
CY2012	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q4
CY2012Q4	dte	Value Of Transactions Company Would Have Been Exposed To If Credit Rating Below Investment Grade ValueOfTransactionsCompanyWouldHaveBeenExposedToIfCreditRatingBelowInvestmentGrade	326000000	USD
CY2011Q4	dte	Weighted Average Grant Date Fair Value Per Share Balance WeightedAverageGrantDateFairValuePerShareBalance	42.25
CY2012Q4	dte	Weighted Average Grant Date Fair Value Per Share Balance WeightedAverageGrantDateFairValuePerShareBalance	48.33
CY2012	dei	Amendment Flag AmendmentFlag	false
CY2012	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2012	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2012
CY2012	dei	Document Period End Date DocumentPeriodEndDate	2012-12-31
CY2012	dei	Document Type DocumentType	10-K
CY2012	dei	Entity Central Index Key EntityCentralIndexKey	0000936340
CY2013Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	172545941	shares
CY2012	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2012	dei	Entity Filer Category EntityFilerCategory	Accelerated Filer
CY2012Q2	dei	Entity Public Float EntityPublicFloat	10200000000	USD
CY2012	dei	Entity Registrant Name EntityRegistrantName	DTE ENERGY CO
CY2012	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2012	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No

Files In Submission

Name	View Source	Status
0000936340-13-000028-index-headers.html	Edgar Link	pending
0000936340-13-000028-index.html	Edgar Link	pending
0000936340-13-000028.txt	Edgar Link	pending
0000936340-13-000028-xbrl.zip	Edgar Link	pending
a20121231ex1081.htm	Edgar Link	pending
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chartb.jpg	Edgar Link	pending
dte-20121231.xml	Edgar Link	completed
dte-20121231.xsd	Edgar Link	pending
dte-20121231_cal.xml	Edgar Link	unprocessable
dte-20121231_def.xml	Edgar Link	unprocessable
dte-20121231_lab.xml	Edgar Link	unprocessable
dte-20121231_pre.xml	Edgar Link	unprocessable
dteenergy2012123110k.htm	Edgar Link	pending
dteenergy2012123110k.pdf	Edgar Link	pending
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$DTE
DTE ENERGY CO Stock $dte

2012 Form 10-K Financial Statement

#000093634013000028 Filed on February 20, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$DTE DTE ENERGY CO Stock $dte

2012 Form 10-K Financial Statement

#000093634013000028 Filed on February 20, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$DTE
DTE ENERGY CO Stock $dte