$DTE
DTE ENERGY CO Stock $dte

$dte Overview Financials Valuation SEC Filings Company Website

2016 Form 10-K Financial Statement

#000093634017000064 Filed on February 09, 2017

Income Statement

Concept	2016	2015 Q4	2015 Q3
Revenue	$10.63B	$2.487B	$2.598B
YoY Change	2.83%	-19.2%	0.12%
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	$976.0M	$227.0M	$196.0M
YoY Change	14.55%	-21.72%	-33.11%
% of Gross Profit
Operating Expenses	$9.135B	$2.256B	$2.133B
YoY Change	1.59%	-10.48%	-10.0%
Operating Profit	$1.486B	$134.0M	$440.0M
YoY Change	19.94%	-75.28%	84.1%
Interest Expense	$472.0M	-$106.0M	$116.0M
YoY Change	4.89%	-12.4%	8.41%
% of Operating Profit	31.76%	-79.1%	26.36%
Other Income/Expense, Net	-$381.0M	$29.00M	-$74.00M
YoY Change	31.83%	-1066.67%	21.31%
Pretax Income	$1.105B	$57.00M	$366.0M
YoY Change	16.32%	-86.93%	105.62%
Income Tax	$271.0M	-$20.00M	$102.0M
% Of Pretax Income	24.52%	-35.09%	27.87%
Net Earnings	$868.0M	$80.00M	$265.0M
YoY Change	19.39%	-73.24%	69.87%
Net Earnings / Revenue	8.17%	3.22%	10.2%
Basic Earnings Per Share	$4.84	$0.45	$1.47
Diluted Earnings Per Share	$4.83	$0.45	$1.47
COMMON SHARES
Basic Shares Outstanding	179.0M shares		179.0M shares
Diluted Shares Outstanding	179.0M shares		180.0M shares

Balance Sheet

Concept	2016	2015 Q4	2015 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$92.00M	$37.00M	$67.00M
YoY Change	148.65%	-22.92%	11.67%
Cash & Equivalents	$92.00M	$37.00M	$67.00M
Short-Term Investments
Other Short-Term Assets	$305.0M	$203.0M	$346.0M
YoY Change	-21.19%	-14.71%	13.44%
Inventory	$772.0M	$803.0M	$840.0M
Prepaid Expenses
Receivables	$1.522B	$1.276B	$1.242B
Other Receivables	$71.00M	$72.00M	$79.00M
Total Short-Term Assets	$2.762B	$2.575B	$2.700B
YoY Change	7.26%	-14.51%	-2.0%
LONG-TERM ASSETS
Property, Plant & Equipment	$19.73B	$18.03B	$17.87B
YoY Change	9.4%	7.22%	8.29%
Goodwill		$2.018B	$2.018B
YoY Change		0.0%	0.0%
Intangibles		$89.00M	$100.0M
YoY Change		-19.82%	-16.67%
Long-Term Investments	$2.307B	$514.0M	$1.931B
YoY Change	15.93%	18.43%	2.93%
Other Assets	$4.041B	$179.0M	$248.0M
YoY Change	4.39%	-30.89%	2.06%
Total Long-Term Assets	$29.28B	$6.117B	$6.204B
YoY Change	12.24%	-1.31%	17.61%
TOTAL ASSETS
Total Short-Term Assets	$2.762B	$2.575B	$2.700B
Total Long-Term Assets	$29.28B	$6.117B	$6.204B
Total Assets	$32.04B	$28.66B	$28.65B
YoY Change	11.79%	3.0%	8.64%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$1.079B	$809.0M	$835.0M
YoY Change	33.37%	-16.86%	-4.35%
Accrued Expenses	$96.00M	$89.00M	$119.0M
YoY Change	7.87%	3.49%	8.18%
Deferred Revenue
YoY Change
Short-Term Debt	$499.0M	$499.0M	$185.0M
YoY Change	0.0%	25.38%	-71.67%
Long-Term Debt Due	$14.00M	$473.0M	$468.0M
YoY Change	-97.04%	72.63%	70.8%
Total Short-Term Liabilities	$2.437B	$2.528B	$2.273B
YoY Change	-3.6%	-1.9%	-18.97%
LONG-TERM LIABILITIES
Long-Term Debt	$11.27B	$8.280B	$8.368B
YoY Change	28.64%	5.34%	12.69%
Other Long-Term Liabilities	$4.674B	$207.0M	$219.0M
YoY Change	0.39%	-26.33%	-21.22%
Total Long-Term Liabilities	$15.94B	$8.579B	$8.692B
YoY Change	18.84%	-0.67%	16.27%
TOTAL LIABILITIES
Total Short-Term Liabilities	$2.437B	$2.528B	$2.273B
Total Long-Term Liabilities	$15.94B	$8.579B	$8.692B
Total Liabilities	$23.03B	$11.11B	$10.97B
YoY Change	15.79%	-0.95%	6.65%
SHAREHOLDERS EQUITY
Retained Earnings		$4.794B	$4.845B
YoY Change		4.72%	10.06%
Common Stock		$4.123B	$4.117B
YoY Change		5.61%	5.56%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$9.011B	$8.772B	$8.812B
YoY Change
Total Liabilities & Shareholders Equity	$32.04B	$28.66B	$28.65B
YoY Change	11.79%	2.73%	8.64%

Cashflow Statement

Concept	2016	2015 Q4	2015 Q3
OPERATING ACTIVITIES
Net Income	$868.0M	$80.00M	$265.0M
YoY Change	19.39%	-73.24%	69.87%
Depreciation, Depletion And Amortization	$976.0M	$227.0M	$196.0M
YoY Change	14.55%	-21.72%	-33.11%
Cash From Operating Activities	$2.084B	$443.0M	$293.0M
YoY Change	8.77%	-19.01%	31.98%
INVESTING ACTIVITIES
Capital Expenditures	-$2.045B	-$619.0M	-$506.0M
YoY Change	1.24%	13.16%	19.91%
Acquisitions	$1.147B
YoY Change	375.93%
Other Investing Activities	-$36.00M	-$13.00M	-$30.00M
YoY Change	-30.77%	-76.79%	-193.75%
Cash From Investing Activities	-$3.390B	-$632.0M	-$536.0M
YoY Change	53.81%	4.81%	37.44%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net	$33.00M
YoY Change	-466.67%
Debt Paid & Issued, Net	$807.0M
YoY Change	182.17%
Cash From Financing Activities	$1.359B	159.0M	80.00M
YoY Change	390.61%	261.36%	-47.71%
NET CHANGE
Cash From Operating Activities	$2.084B	443.0M	293.0M
Cash From Investing Activities	-$3.390B	-632.0M	-536.0M
Cash From Financing Activities	$1.359B	159.0M	80.00M
Net Change In Cash	$53.00M	-30.00M	-163.0M
YoY Change	-581.82%	150.0%	986.67%
FREE CASH FLOW
Cash From Operating Activities	$2.084B	$443.0M	$293.0M
Capital Expenditures	-$2.045B	-$619.0M	-$506.0M
Free Cash Flow	$4.129B	$1.062B	$799.0M
YoY Change	4.9%	-2.93%	24.07%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2016	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2016	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2016	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2016
CY2016	dei	Document Period End Date DocumentPeriodEndDate	2016-12-31
CY2016	dei	Document Type DocumentType	10-K
CY2016	dei	Amendment Flag AmendmentFlag	false
CY2016	dei	Entity Central Index Key EntityCentralIndexKey	0000936340
CY2017Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	179432999	shares
CY2016	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2016	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2016Q2	dei	Entity Public Float EntityPublicFloat	17100000000	USD
CY2016	dei	Entity Registrant Name EntityRegistrantName	DTE ENERGY CO
CY2016	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2016	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2014	dte	Employee Service Sharebased Compensation Equityand Liability Tax EmployeeServiceSharebasedCompensationEquityandLiabilityTax	40000000	USD
CY2016	dte	Adjustmentsto Additional Paidin Capital Financial Instruments Subjectto Mandatory Redemption Issuance Cost AdjustmentstoAdditionalPaidinCapitalFinancialInstrumentsSubjecttoMandatoryRedemptionIssuanceCost	18000000	USD
CY2016	dte	Adjustmentsto Additional Paidin Capital Premiumon Financial Instruments Subjectto Mandatory Redemption AdjustmentstoAdditionalPaidinCapitalPremiumonFinancialInstrumentsSubjecttoMandatoryRedemption	98000000	USD
CY2014	dte	Allocated Sharebased Compensation Expense Equityand Liability AllocatedSharebasedCompensationExpenseEquityandLiability	103000000	USD
CY2015	dte	Allocated Sharebased Compensation Expense Equityand Liability AllocatedSharebasedCompensationExpenseEquityandLiability	34000000	USD
CY2016	dte	Allocated Sharebased Compensation Expense Equityand Liability AllocatedSharebasedCompensationExpenseEquityandLiability	61000000	USD
CY2016	dte	Amortization Period Of Cost To Achieve Deferral AmortizationPeriodOfCostToAchieveDeferral	P10Y
CY2014	dte	Amortizationof Securitized Regulatory Asset AmortizationofSecuritizedRegulatoryAsset	303000000	USD
CY2015	dte	Amortizationof Securitized Regulatory Asset AmortizationofSecuritizedRegulatoryAsset	-38000000	USD
CY2016	dte	Amortizationof Securitized Regulatory Asset AmortizationofSecuritizedRegulatoryAsset	0	USD
CY2015	dte	Capitalized Interest Costs Including Allowancefor Debt Funds Used During Construction CapitalizedInterestCostsIncludingAllowanceforDebtFundsUsedDuringConstruction	13000000	USD
CY2016	dte	Capitalized Interest Costs Including Allowancefor Debt Funds Used During Construction CapitalizedInterestCostsIncludingAllowanceforDebtFundsUsedDuringConstruction	10000000	USD
CY2015	dte	Capitalized Interest Costs Including Allowancefor Equity Funds Used During Construction CapitalizedInterestCostsIncludingAllowanceforEquityFundsUsedDuringConstruction	21000000	USD
CY2016	dte	Capitalized Interest Costs Including Allowancefor Equity Funds Used During Construction CapitalizedInterestCostsIncludingAllowanceforEquityFundsUsedDuringConstruction	21000000	USD
CY2015Q4	dte	Cash Collateral Posted Net Of Cash Collateral Received CashCollateralPostedNetOfCashCollateralReceived	37000000	USD
CY2016Q4	dte	Cash Collateral Posted Net Of Cash Collateral Received CashCollateralPostedNetOfCashCollateralReceived	34000000	USD
CY2015Q4	dte	Cashcollateralpaidnotrelatedtounrealizedderivativepositions Cashcollateralpaidnotrelatedtounrealizedderivativepositions	6000000	USD
CY2016Q4	dte	Cashcollateralpaidnotrelatedtounrealizedderivativepositions Cashcollateralpaidnotrelatedtounrealizedderivativepositions	18000000	USD
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CY2016Q4	dte	Cashcollateralreceivednotrelatedtounrealizedderivativepositions Cashcollateralreceivednotrelatedtounrealizedderivativepositions	5000000	USD
CY2014	dte	Charitable Contributions CharitableContributions	25000000	USD
CY2015	dte	Charitable Contributions CharitableContributions	12000000	USD
CY2016	dte	Charitable Contributions CharitableContributions	26000000	USD
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CY2015Q4	dte	Deferred Tax Liability Netof Valuation Allowance DeferredTaxLiabilityNetofValuationAllowance	5011000000	USD
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CY2015Q4	dte	Deferred Tax Liability Pensionand Benefits DeferredTaxLiabilityPensionandBenefits	301000000	USD
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CY2015	dte	Employee Service Sharebased Compensation Allocationof Recognized Period Costs Liabilityand Equity Capitalized Amount EmployeeServiceSharebasedCompensationAllocationofRecognizedPeriodCostsLiabilityandEquityCapitalizedAmount	5000000	USD
CY2016	dte	Employee Service Sharebased Compensation Allocationof Recognized Period Costs Liabilityand Equity Capitalized Amount EmployeeServiceSharebasedCompensationAllocationofRecognizedPeriodCostsLiabilityandEquityCapitalizedAmount	10000000	USD
CY2015	dte	Employee Service Sharebased Compensation Equityand Liability Tax EmployeeServiceSharebasedCompensationEquityandLiabilityTax	13000000	USD
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CY2014	dte	Enactment Of Michigan Corporate Income Tax Net Of Federal Expense EnactmentOfMichiganCorporateIncomeTaxNetOfFederalExpense	8000000	USD
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CY2016	dte	Enactment Of Michigan Corporate Income Tax Net Of Federal Expense EnactmentOfMichiganCorporateIncomeTaxNetOfFederalExpense	0	USD
CY2016Q4	dte	Equity Units Percentage Interestin Attached Debt Instrument EquityUnitsPercentageInterestinAttachedDebtInstrument	0.00005
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CY2016	dte	Incomefrom Re Finvestees IncomefromREFinvestees	75000000	USD
CY2014	dte	Incomeon Contract Services IncomeonContractServices	23000000	USD
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CY2015Q4	dte	Lettersof Credit Issuedthatcouldbeusedtooffsetnetderivativeliabilities LettersofCreditIssuedthatcouldbeusedtooffsetnetderivativeliabilities	7000000	USD
CY2016Q4	dte	Lettersof Credit Issuedthatcouldbeusedtooffsetnetderivativeliabilities LettersofCreditIssuedthatcouldbeusedtooffsetnetderivativeliabilities	2000000	USD
CY2015Q4	dte	Lettersof Credit Received Usedto Offset Net Derivative Assets LettersofCreditReceivedUsedtoOffsetNetDerivativeAssets	2000000	USD
CY2016Q4	dte	Lettersof Credit Received Usedto Offset Net Derivative Assets LettersofCreditReceivedUsedtoOffsetNetDerivativeAssets	2000000	USD
CY2016Q4	dte	Lineof Credit Facility Dividend Restrictions Amount LineofCreditFacilityDividendRestrictionsAmount	1500000000	USD
CY2014	dte	Nuclearfuelamortization Nuclearfuelamortization	48000000	USD
CY2015	dte	Nuclearfuelamortization Nuclearfuelamortization	46000000	USD
CY2016	dte	Nuclearfuelamortization Nuclearfuelamortization	58000000	USD
CY2016Q4	dte	Numberof Electric Utility Customers NumberofElectricUtilityCustomers	2200000	customer
CY2016Q4	dte	Numberof Gas Utility Customers NumberofGasUtilityCustomers	1300000	customer
CY2016Q4	dte	Other Restrictionson Paymentof Dividends Amount OtherRestrictionsonPaymentofDividendsAmount	0	USD
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CY2016	dte	Othernonoperatingincometotal Othernonoperatingincometotal	207000000	USD
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CY2014	dte	Premiumon Financial Instruments Subjectto Mandatory Redemption PremiumonFinancialInstrumentsSubjecttoMandatoryRedemption	0	USD
CY2015	dte	Premiumon Financial Instruments Subjectto Mandatory Redemption PremiumonFinancialInstrumentsSubjecttoMandatoryRedemption	0	USD
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CY2016	dte	Property Maintenance Accrual Period PropertyMaintenanceAccrualPeriod	P18M
CY2014	dte	Regulated Operating Expense Fuel Used Purchased Power Gas RegulatedOperatingExpenseFuelUsedPurchasedPowerGas	2407000000	USD
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CY2015Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	10087000000	USD
CY2016Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	10299000000	USD
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CY2016	dte	Regulated Operating Expense Fuel Used Purchased Power Gas RegulatedOperatingExpenseFuelUsedPurchasedPowerGas	1968000000	USD
CY2016Q4	dte	Remainingamountofoffsetstoderivativenetliabilitypositionsforhardandsofttriggerprovisions Remainingamountofoffsetstoderivativenetliabilitypositionsforhardandsofttriggerprovisions	54000000	USD
CY2014	dte	Repaymentof Secured Tax Exempt Debt RepaymentofSecuredTaxExemptDebt	0	USD
CY2015	dte	Repaymentof Secured Tax Exempt Debt RepaymentofSecuredTaxExemptDebt	0	USD
CY2016	dte	Repaymentof Secured Tax Exempt Debt RepaymentofSecuredTaxExemptDebt	59000000	USD
CY2016	dte	Specific Review Of Probable Future Collections Based On Receivable Balances In Excess Of90 Days SpecificReviewOfProbableFutureCollectionsBasedOnReceivableBalancesInExcessOf90Days	P30D
CY2014	dte	Unregulated Operating Expense Fuel Used Purchased Power Gas UnregulatedOperatingExpenseFuelUsedPurchasedPowerGas	4615000000	USD
CY2015	dte	Unregulated Operating Expense Fuel Used Purchased Power Gas UnregulatedOperatingExpenseFuelUsedPurchasedPowerGas	3481000000	USD
CY2016	dte	Unregulated Operating Expense Fuel Used Purchased Power Gas UnregulatedOperatingExpenseFuelUsedPurchasedPowerGas	3562000000	USD
CY2015Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	809000000	USD
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CY2016Q4	us-gaap	Additional Collateral Aggregate Fair Value AdditionalCollateralAggregateFairValue	429000000	USD
CY2015Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	49000000	USD
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CY2016	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	16000000	USD
CY2014	us-gaap	Amortization Of Regulatory Asset AmortizationOfRegulatoryAsset	159000000	USD
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CY2016	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	5000000	USD
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CY2016Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	2197000000	USD
CY2014Q4	us-gaap	Assets Assets	27827000000	USD
CY2015Q4	us-gaap	Assets Assets	28662000000	USD
CY2016Q4	us-gaap	Assets Assets	32041000000	USD
CY2015Q4	us-gaap	Assets Current AssetsCurrent	2575000000	USD
CY2016Q4	us-gaap	Assets Current AssetsCurrent	2762000000	USD
CY2015Q4	us-gaap	Assets Noncurrent AssetsNoncurrent	6117000000	USD
CY2016Q4	us-gaap	Assets Noncurrent AssetsNoncurrent	7276000000	USD
CY2014	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	212000000	USD
CY2015	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	207000000	USD
CY2016	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	312000000	USD
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CY2016Q4	us-gaap	Capital Lease Obligations Noncurrent CapitalLeaseObligationsNoncurrent	7000000	USD
CY2015Q4	us-gaap	Capital Leased Assets Gross CapitalLeasedAssetsGross	48000000	USD
CY2016Q4	us-gaap	Capital Leased Assets Gross CapitalLeasedAssetsGross	44000000	USD
CY2016Q4	us-gaap	Capital Leases Future Minimum Payments Receivable CapitalLeasesFutureMinimumPaymentsReceivable	44000000	USD
CY2016Q4	us-gaap	Capital Leases Future Minimum Payments Receivable Current CapitalLeasesFutureMinimumPaymentsReceivableCurrent	12000000	USD
CY2016Q4	us-gaap	Capital Leases Future Minimum Payments Receivable Due Thereafter CapitalLeasesFutureMinimumPaymentsReceivableDueThereafter	0	USD
CY2016Q4	us-gaap	Capital Leases Future Minimum Payments Receivable In Five Years CapitalLeasesFutureMinimumPaymentsReceivableInFiveYears	0	USD
CY2016Q4	us-gaap	Capital Leases Future Minimum Payments Receivable In Four Years CapitalLeasesFutureMinimumPaymentsReceivableInFourYears	9000000	USD
CY2016Q4	us-gaap	Capital Leases Future Minimum Payments Receivable In Three Years CapitalLeasesFutureMinimumPaymentsReceivableInThreeYears	11000000	USD
CY2016Q4	us-gaap	Capital Leases Future Minimum Payments Receivable In Two Years CapitalLeasesFutureMinimumPaymentsReceivableInTwoYears	12000000	USD
CY2015Q4	us-gaap	Capital Leases Lessee Balance Sheet Assets By Major Class Accumulated Deprecation CapitalLeasesLesseeBalanceSheetAssetsByMajorClassAccumulatedDeprecation	26000000	USD
CY2016Q4	us-gaap	Capital Leases Lessee Balance Sheet Assets By Major Class Accumulated Deprecation CapitalLeasesLesseeBalanceSheetAssetsByMajorClassAccumulatedDeprecation	32000000	USD
CY2016Q4	us-gaap	Capital Leases Lessor Balance Sheet Net Investment In Direct Financing Leases Current CapitalLeasesLessorBalanceSheetNetInvestmentInDirectFinancingLeasesCurrent	7000000	USD
CY2016Q4	us-gaap	Capital Leases Lessor Balance Sheet Net Investment In Direct Financing Leases Noncurrent CapitalLeasesLessorBalanceSheetNetInvestmentInDirectFinancingLeasesNoncurrent	57000000	USD
CY2016Q4	us-gaap	Capital Leases Net Investment In Direct Financing Leases CapitalLeasesNetInvestmentInDirectFinancingLeases	64000000	USD
CY2016Q4	us-gaap	Capital Leases Net Investment In Direct Financing Leases Deferred Income CapitalLeasesNetInvestmentInDirectFinancingLeasesDeferredIncome	20000000	USD
CY2016Q4	us-gaap	Capital Leases Net Investment In Direct Financing Leases Unguaranteed Residual Values Of Leased Property CapitalLeasesNetInvestmentInDirectFinancingLeasesUnguaranteedResidualValuesOfLeasedProperty	40000000	USD
CY2015Q4	us-gaap	Capitalized Computer Software Accumulated Amortization CapitalizedComputerSoftwareAccumulatedAmortization	439000000	USD
CY2016Q4	us-gaap	Capitalized Computer Software Accumulated Amortization CapitalizedComputerSoftwareAccumulatedAmortization	435000000	USD
CY2014	us-gaap	Capitalized Computer Software Amortization1 CapitalizedComputerSoftwareAmortization1	77000000	USD
CY2015	us-gaap	Capitalized Computer Software Amortization1 CapitalizedComputerSoftwareAmortization1	98000000	USD
CY2016	us-gaap	Capitalized Computer Software Amortization1 CapitalizedComputerSoftwareAmortization1	89000000	USD
CY2015Q4	us-gaap	Capitalized Computer Software Gross CapitalizedComputerSoftwareGross	770000000	USD
CY2016Q4	us-gaap	Capitalized Computer Software Gross CapitalizedComputerSoftwareGross	715000000	USD
CY2013Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	52000000	USD
CY2014Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	48000000	USD
CY2015Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	37000000	USD
CY2016Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	92000000	USD
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CY2016	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	55000000	USD
CY2016Q4	us-gaap	Collateral Already Posted Aggregate Fair Value CollateralAlreadyPostedAggregateFairValue	0	USD
CY2015Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2016Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2014	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	2.69
CY2015	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	2.84
CY2016	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	3.06
CY2015Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0
CY2016Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0
CY2016Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	179432581	shares
CY2015Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	400000000	shares
CY2016Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	400000000	shares
CY2015Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	179470213	shares
CY2016Q4	us-gaap	Cumulative Effect Of New Accounting Principle In Period Of Adoption CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	3000000	USD
CY2014	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-16000000	USD
CY2016	us-gaap	Costs And Expenses CostsAndExpenses	9185000000	USD
CY2015Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	179470213	shares
CY2016Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	179432581	shares
CY2015Q4	us-gaap	Common Stock Value CommonStockValue	4123000000	USD
CY2016Q4	us-gaap	Common Stock Value CommonStockValue	4030000000	USD
CY2014	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	886000000	USD
CY2015	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	737000000	USD
CY2016	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	880000000	USD
CY2014	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	6000000	USD
CY2015	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-7000000	USD
CY2016	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-34000000	USD
CY2014	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	892000000	USD
CY2015	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	730000000	USD
CY2016	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	846000000	USD
CY2014	us-gaap	Cost Of Services Depreciation And Amortization CostOfServicesDepreciationAndAmortization	1145000000	USD
CY2015	us-gaap	Cost Of Services Depreciation And Amortization CostOfServicesDepreciationAndAmortization	852000000	USD
CY2016	us-gaap	Cost Of Services Depreciation And Amortization CostOfServicesDepreciationAndAmortization	976000000	USD
CY2014	us-gaap	Costs And Expenses CostsAndExpenses	10711000000	USD
CY2015	us-gaap	Costs And Expenses CostsAndExpenses	9098000000	USD
CY2015	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-3000000	USD
CY2016	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-1000000	USD
CY2014	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	8000000	USD
CY2015	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-7000000	USD
CY2016	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	6000000	USD
CY2014	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	24000000	USD
CY2015	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-4000000	USD
CY2016	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	7000000	USD
CY2016Q4	us-gaap	Debt Instrument Face Amount DebtInstrumentFaceAmount	2680000000	USD
CY2015Q4	us-gaap	Decommissioning Fund Investments DecommissioningFundInvestments	1236000000	USD
CY2016Q4	us-gaap	Decommissioning Fund Investments DecommissioningFundInvestments	1320000000	USD
CY2015Q4	us-gaap	Decommissioning Liability Noncurrent DecommissioningLiabilityNoncurrent	177000000	USD
CY2016Q4	us-gaap	Decommissioning Liability Noncurrent DecommissioningLiabilityNoncurrent	194000000	USD
CY2014	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	289000000	USD
CY2015	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	178000000	USD
CY2016	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	184000000	USD
CY2014	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	356000000	USD
CY2015	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	237000000	USD
CY2016	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	265000000	USD
CY2015Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	3888000000	USD
CY2016Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	4126000000	USD
CY2014	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	356000000	USD
CY2015	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	237000000	USD
CY2016	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	265000000	USD
CY2015	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	59000000	USD
CY2016	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	81000000	USD
CY2014	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	67000000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	1088000000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	1463000000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Domestic DeferredTaxAssetsOperatingLossCarryforwardsDomestic	177000000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Domestic DeferredTaxAssetsOperatingLossCarryforwardsDomestic	190000000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	63000000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	59000000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Regulatory Assets And Liabilities DeferredTaxAssetsRegulatoryAssetsAndLiabilities	5000000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Regulatory Assets And Liabilities DeferredTaxAssetsRegulatoryAssetsAndLiabilities	0	USD
CY2015Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	465000000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	643000000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax	284000000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards General Business DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness	359000000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	35000000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	36000000	USD
CY2015Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	3923000000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	4162000000	USD
CY2015Q4	us-gaap	Deferred Tax Liabilities Investment In Noncontrolled Affiliates DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates	82000000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Investment In Noncontrolled Affiliates DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates	109000000	USD
CY2015Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	4000000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	-11000000	USD
CY2015Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	4211000000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	4596000000	USD
CY2015Q4	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	1133000000	USD
CY2016Q4	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	1152000000	USD
CY2014	us-gaap	Defined Benefit Plan Ultimate Health Care Cost Trend Rate DefinedBenefitPlanUltimateHealthCareCostTrendRate	0.0450
CY2014	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	48000000	USD
CY2015	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	49000000	USD
CY2016	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	51000000	USD
CY2016	us-gaap	Defined Contribution Plan Maximum Annual Contributions Per Employee Percent DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent	0.04
CY2014	us-gaap	Depreciation Depreciation	683000000	USD
CY2015	us-gaap	Depreciation Depreciation	740000000	USD
CY2016	us-gaap	Depreciation Depreciation	783000000	USD
CY2014	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	1145000000	USD
CY2015	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	852000000	USD
CY2016	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	976000000	USD
CY2015Q4	us-gaap	Derivative Asset Collateral Obligation To Return Cash Offset DerivativeAssetCollateralObligationToReturnCashOffset	2000000	USD
CY2016Q4	us-gaap	Derivative Asset Collateral Obligation To Return Cash Offset DerivativeAssetCollateralObligationToReturnCashOffset	7000000	USD
CY2015Q4	us-gaap	Derivative Asset Fair Value Gross Liability And Obligation To Return Cash Offset DerivativeAssetFairValueGrossLiabilityAndObligationToReturnCashOffset	528000000	USD
CY2016Q4	us-gaap	Derivative Asset Fair Value Gross Liability And Obligation To Return Cash Offset DerivativeAssetFairValueGrossLiabilityAndObligationToReturnCashOffset	468000000	USD
CY2015Q4	us-gaap	Derivative Assets DerivativeAssets	183000000	USD
CY2016Q4	us-gaap	Derivative Assets DerivativeAssets	81000000	USD
CY2015Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	129000000	USD
CY2016Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	47000000	USD
CY2015Q4	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	54000000	USD
CY2016Q4	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	34000000	USD
CY2015Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	711000000	USD
CY2016Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	656000000	USD
CY2015	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	-28000000	USD
CY2016Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	549000000	USD
CY2015Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	705000000	USD
CY2016	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	-109000000	USD
CY2015Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	143000000	USD
CY2016Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	167000000	USD
CY2015Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	57000000	USD
CY2016Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	69000000	USD
CY2015Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	86000000	USD
CY2016Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	98000000	USD
CY2015Q4	us-gaap	Derivative Liability Collateral Right To Reclaim Cash Offset DerivativeLiabilityCollateralRightToReclaimCashOffset	36000000	USD
CY2016Q4	us-gaap	Derivative Liability Collateral Right To Reclaim Cash Offset DerivativeLiabilityCollateralRightToReclaimCashOffset	28000000	USD
CY2015Q4	us-gaap	Derivative Liability Fair Value Gross Asset And Right To Reclaim Cash Offset DerivativeLiabilityFairValueGrossAssetAndRightToReclaimCashOffset	562000000	USD
CY2016Q4	us-gaap	Derivative Liability Fair Value Gross Asset And Right To Reclaim Cash Offset DerivativeLiabilityFairValueGrossAssetAndRightToReclaimCashOffset	489000000	USD
CY2016Q4	us-gaap	Derivative Net Liability Position Aggregate Fair Value DerivativeNetLiabilityPositionAggregateFairValue	487000000	USD
CY2014	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	476000000	USD
CY2015	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	510000000	USD
CY2016	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	548000000	USD
CY2015Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	131000000	USD
CY2016Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	148000000	USD
CY2014	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.11
CY2015Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.53
CY2015Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.61
CY2015Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.47
CY2015Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.45
CY2015	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.05
CY2016Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.38
CY2016Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.84
CY2016Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.88
CY2016Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.73
CY2016	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.84
CY2014	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.10
CY2015Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.53
CY2015Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.61
CY2015Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.47
CY2015Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.45
CY2015	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.05
CY2016Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.37
CY2016Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.84
CY2016Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.88
CY2016Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.73
CY2016	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.83
CY2014	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.285
CY2015	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.242
CY2016	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.245
CY2014	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2015	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2016	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2016Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	53000000	USD
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CY2015Q4	us-gaap	Energy Related Inventory EnergyRelatedInventory	480000000	USD
CY2016Q4	us-gaap	Energy Related Inventory EnergyRelatedInventory	416000000	USD
CY2015Q4	us-gaap	Equity Method Investment Difference Between Carrying Amount And Underlying Equity EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity	81000000	USD
CY2016Q4	us-gaap	Equity Method Investment Difference Between Carrying Amount And Underlying Equity EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity	73000000	USD
CY2014	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	55000000	USD
CY2015	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	64000000	USD
CY2016	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	68000000	USD
CY2014Q4	us-gaap	Equity Method Investments EquityMethodInvestments	434000000	USD
CY2015Q4	us-gaap	Equity Method Investments EquityMethodInvestments	514000000	USD
CY2016Q4	us-gaap	Equity Method Investments EquityMethodInvestments	752000000	USD
CY2016	us-gaap	Excise And Sales Taxes ExciseAndSalesTaxes	0	USD
CY2016	us-gaap	Extinguishment Of Debt Amount ExtinguishmentOfDebtAmount	807000000	USD
CY2015	us-gaap	Fair Value Assets Measured On Recurring Basis Change In Unrealized Gain Loss FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss	-129000000	USD
CY2016	us-gaap	Fair Value Assets Measured On Recurring Basis Change In Unrealized Gain Loss FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss	-157000000	USD
CY2015	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Gain Loss Included In Earnings FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings	-8000000	USD
CY2016	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Gain Loss Included In Earnings FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings	-160000000	USD
CY2015	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Purchases FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationPurchases	2000000	USD
CY2016	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Purchases FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationPurchases	1000000	USD
CY2015	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Settlements FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements	34000000	USD
CY2016	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Settlements FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements	-69000000	USD
CY2015	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Transfers Into Level3 FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersIntoLevel3	0	USD
CY2016	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Transfers Into Level3 FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersIntoLevel3	0	USD
CY2015	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Transfers Out Of Level3 FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersOutOfLevel3	0	USD
CY2016	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Transfers Out Of Level3 FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersOutOfLevel3	0	USD
CY2014Q4	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis With Unobservable Inputs FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs	24000000	USD
CY2015Q4	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis With Unobservable Inputs FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs	-4000000	USD
CY2016Q4	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis With Unobservable Inputs FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs	-88000000	USD
CY2015Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	62000000	USD
CY2016Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	70000000	USD
CY2016Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	26000000	USD
CY2016Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	21000000	USD
CY2016Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	24000000	USD
CY2016Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	26000000	USD
CY2016Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	26000000	USD
CY2014	us-gaap	Gain Loss On Sales Of Assets And Asset Impairment Charges GainLossOnSalesOfAssetsAndAssetImpairmentCharges	12000000	USD
CY2015	us-gaap	Gain Loss On Sales Of Assets And Asset Impairment Charges GainLossOnSalesOfAssetsAndAssetImpairmentCharges	-106000000	USD
CY2016	us-gaap	Gain Loss On Sales Of Assets And Asset Impairment Charges GainLossOnSalesOfAssetsAndAssetImpairmentCharges	-7000000	USD
CY2014Q4	us-gaap	Goodwill Goodwill	2018000000	USD
CY2015Q4	us-gaap	Goodwill Goodwill	2018000000	USD
CY2016Q4	us-gaap	Goodwill Goodwill	2286000000	USD
CY2015	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	0	USD
CY2016	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	268000000	USD
CY2014	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1275000000	USD
CY2015	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	950000000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1105000000	USD
CY2014	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	48000000	USD
CY2015	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	66000000	USD
CY2016	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	68000000	USD
CY2014	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	364000000	USD
CY2015	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	230000000	USD
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	271000000	USD
CY2014	us-gaap	Income Tax Rate Reconciliation Deductions Employee Stock Ownership Plan Dividends IncomeTaxRateReconciliationDeductionsEmployeeStockOwnershipPlanDividends	4000000	USD
CY2015	us-gaap	Income Tax Rate Reconciliation Deductions Employee Stock Ownership Plan Dividends IncomeTaxRateReconciliationDeductionsEmployeeStockOwnershipPlanDividends	5000000	USD
CY2016	us-gaap	Income Tax Rate Reconciliation Deductions Employee Stock Ownership Plan Dividends IncomeTaxRateReconciliationDeductionsEmployeeStockOwnershipPlanDividends	5000000	USD
CY2014	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	446000000	USD
CY2015	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	333000000	USD
CY2016	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	387000000	USD
CY2014	us-gaap	Income Tax Reconciliation Minority Interest Income Expense IncomeTaxReconciliationMinorityInterestIncomeExpense	2000000	USD
CY2015	us-gaap	Income Tax Reconciliation Minority Interest Income Expense IncomeTaxReconciliationMinorityInterestIncomeExpense	-2000000	USD
CY2016	us-gaap	Income Tax Reconciliation Minority Interest Income Expense IncomeTaxReconciliationMinorityInterestIncomeExpense	-12000000	USD
CY2014	us-gaap	Income Tax Reconciliation Nondeductible Expense Depreciation IncomeTaxReconciliationNondeductibleExpenseDepreciation	-4000000	USD
CY2015	us-gaap	Income Tax Reconciliation Nondeductible Expense Depreciation IncomeTaxReconciliationNondeductibleExpenseDepreciation	-4000000	USD
CY2016	us-gaap	Income Tax Reconciliation Nondeductible Expense Depreciation IncomeTaxReconciliationNondeductibleExpenseDepreciation	-4000000	USD
CY2014	us-gaap	Income Tax Reconciliation Nondeductible Expense Other IncomeTaxReconciliationNondeductibleExpenseOther	-7000000	USD
CY2015	us-gaap	Income Tax Reconciliation Nondeductible Expense Other IncomeTaxReconciliationNondeductibleExpenseOther	-8000000	USD
CY2016	us-gaap	Income Tax Reconciliation Nondeductible Expense Other IncomeTaxReconciliationNondeductibleExpenseOther	-10000000	USD
CY2014	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	1000000	USD
CY2015	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	6000000	USD
CY2016	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-7000000	USD
CY2014	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	51000000	USD
CY2015	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	35000000	USD
CY2016	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	58000000	USD
CY2014	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	6000000	USD
CY2015	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	7000000	USD
CY2016	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	5000000	USD
CY2014	us-gaap	Income Tax Reconciliation Tax Credits Other IncomeTaxReconciliationTaxCreditsOther	119000000	USD
CY2015	us-gaap	Income Tax Reconciliation Tax Credits Other IncomeTaxReconciliationTaxCreditsOther	122000000	USD
CY2016	us-gaap	Income Tax Reconciliation Tax Credits Other IncomeTaxReconciliationTaxCreditsOther	145000000	USD
CY2014	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-35000000	USD
CY2015	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	14000000	USD
CY2016	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-1000000	USD
CY2014	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	-48000000	USD
CY2015	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	-259000000	USD
CY2016	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	226000000	USD
CY2014	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	128000000	USD
CY2015	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-158000000	USD
CY2016	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	145000000	USD
CY2014	us-gaap	Increase Decrease In Derivative Assets And Liabilities IncreaseDecreaseInDerivativeAssetsAndLiabilities	199000000	USD
CY2015	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-1000000	USD
CY2015	us-gaap	Increase Decrease In Derivative Assets And Liabilities IncreaseDecreaseInDerivativeAssetsAndLiabilities	-47000000	USD
CY2016	us-gaap	Increase Decrease In Derivative Assets And Liabilities IncreaseDecreaseInDerivativeAssetsAndLiabilities	-126000000	USD
CY2014	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	177000000	USD
CY2016	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-37000000	USD
CY2014	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-12000000	USD
CY2015	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	177000000	USD
CY2016	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	95000000	USD
CY2014	us-gaap	Increase Decrease In Pension Plan Obligations IncreaseDecreaseInPensionPlanObligations	627000000	USD
CY2015	us-gaap	Increase Decrease In Pension Plan Obligations IncreaseDecreaseInPensionPlanObligations	-147000000	USD
CY2016	us-gaap	Increase Decrease In Pension Plan Obligations IncreaseDecreaseInPensionPlanObligations	19000000	USD
CY2014	us-gaap	Increase Decrease In Postretirement Obligations IncreaseDecreaseInPostretirementObligations	165000000	USD
CY2015	us-gaap	Increase Decrease In Postretirement Obligations IncreaseDecreaseInPostretirementObligations	-287000000	USD
CY2016	us-gaap	Increase Decrease In Postretirement Obligations IncreaseDecreaseInPostretirementObligations	-192000000	USD
CY2014	us-gaap	Increase Decrease In Regulatory Assets And Liabilities IncreaseDecreaseInRegulatoryAssetsAndLiabilities	1177000000	USD
CY2015	us-gaap	Increase Decrease In Regulatory Assets And Liabilities IncreaseDecreaseInRegulatoryAssetsAndLiabilities	-85000000	USD
CY2016	us-gaap	Increase Decrease In Regulatory Assets And Liabilities IncreaseDecreaseInRegulatoryAssetsAndLiabilities	40000000	USD
CY2014	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	-3000000	USD
CY2015	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	-97000000	USD
CY2016	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	-1000000	USD
CY2015Q4	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	151000000	USD
CY2016Q4	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	912000000	USD
CY2015Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	89000000	USD
CY2016Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	842000000	USD
CY2015	us-gaap	Interest Costs Incurred Capitalized InterestCostsIncurredCapitalized	34000000	USD
CY2016	us-gaap	Interest Costs Incurred Capitalized InterestCostsIncurredCapitalized	31000000	USD
CY2014	us-gaap	Interest Expense InterestExpense	429000000	USD
CY2015	us-gaap	Interest Expense InterestExpense	450000000	USD
CY2016	us-gaap	Interest Expense InterestExpense	472000000	USD
CY2014	us-gaap	Interest Paid Net InterestPaidNet	415000000	USD
CY2015	us-gaap	Interest Paid Net InterestPaidNet	428000000	USD
CY2016	us-gaap	Interest Paid Net InterestPaidNet	448000000	USD
CY2015Q4	us-gaap	Interest Payable Current InterestPayableCurrent	89000000	USD
CY2016Q4	us-gaap	Interest Payable Current InterestPayableCurrent	96000000	USD
CY2015Q4	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	323000000	USD
CY2016Q4	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	356000000	USD
CY2014	us-gaap	Investment Income Interest InvestmentIncomeInterest	10000000	USD
CY2015	us-gaap	Investment Income Interest InvestmentIncomeInterest	13000000	USD
CY2016	us-gaap	Investment Income Interest InvestmentIncomeInterest	20000000	USD
CY2015Q4	us-gaap	Junior Subordinated Long Term Notes JuniorSubordinatedLongTermNotes	465000000	USD
CY2016Q4	us-gaap	Junior Subordinated Long Term Notes JuniorSubordinatedLongTermNotes	756000000	USD
CY2014	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	38000000	USD
CY2015	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	43000000	USD
CY2016	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	43000000	USD
CY2015Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	28662000000	USD
CY2016Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	32041000000	USD
CY2015Q4	us-gaap	Liabilities Current LiabilitiesCurrent	2528000000	USD
CY2016Q4	us-gaap	Liabilities Current LiabilitiesCurrent	2437000000	USD
CY2015Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	8579000000	USD
CY2016Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	8836000000	USD
CY2016Q4	us-gaap	Line Of Credit LineOfCredit	653000000	USD
CY2016Q4	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	2070000000	USD
CY2016Q4	us-gaap	Line Of Credit Facility Remaining Borrowing Capacity LineOfCreditFacilityRemainingBorrowingCapacity	1417000000	USD
CY2016Q4	us-gaap	Long Term Debt LongTermDebt	11372000000	USD
CY2015Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	8760000000	USD
CY2016Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	11269000000	USD
CY2015Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	473000000	USD
CY2016Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	14000000	USD
CY2016Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	8300000000	USD
CY2016Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	9000000	USD
CY2016Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	467000000	USD
CY2016Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	688000000	USD
CY2016Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	1502000000	USD
CY2016Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	406000000	USD
CY2015Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	8280000000	USD
CY2016Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	10506000000	USD
CY2015Q4	us-gaap	Long Term Investments LongTermInvestments	1936000000	USD
CY2016Q4	us-gaap	Long Term Investments LongTermInvestments	2273000000	USD
CY2015Q4	us-gaap	Minority Interest MinorityInterest	23000000	USD
CY2016Q4	us-gaap	Minority Interest MinorityInterest	488000000	USD
CY2014	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	211000000	USD
CY2015	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	277000000	USD
CY2016	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	1359000000	USD
CY2014	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2060000000	USD
CY2015	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2204000000	USD
CY2016	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-3388000000	USD
CY2014	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1845000000	USD
CY2015	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1916000000	USD
CY2016	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	2084000000	USD
CY2014	us-gaap	Net Income Loss NetIncomeLoss	905000000	USD
CY2015Q1	us-gaap	Net Income Loss NetIncomeLoss	273000000	USD
CY2015Q2	us-gaap	Net Income Loss NetIncomeLoss	109000000	USD
CY2015Q3	us-gaap	Net Income Loss NetIncomeLoss	265000000	USD
CY2015Q4	us-gaap	Net Income Loss NetIncomeLoss	80000000	USD
CY2015	us-gaap	Net Income Loss NetIncomeLoss	727000000	USD
CY2016Q1	us-gaap	Net Income Loss NetIncomeLoss	247000000	USD
CY2016Q2	us-gaap	Net Income Loss NetIncomeLoss	152000000	USD
CY2016Q3	us-gaap	Net Income Loss NetIncomeLoss	338000000	USD
CY2016Q4	us-gaap	Net Income Loss NetIncomeLoss	131000000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	868000000	USD
CY2014	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	6000000	USD
CY2015	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-7000000	USD
CY2016	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-34000000	USD
CY2014	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	904000000	USD
CY2015	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	725000000	USD
CY2015	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	1000000	USD
CY2016	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	866000000	USD
CY2014	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	904000000	USD
CY2015	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	725000000	USD
CY2016	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	866000000	USD
CY2014	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-315000000	USD
CY2015	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-289000000	USD
CY2016	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-340000000	USD
CY2015Q4	us-gaap	Notes And Loans Receivable Net Noncurrent NotesAndLoansReceivableNetNoncurrent	85000000	USD
CY2016Q4	us-gaap	Notes And Loans Receivable Net Noncurrent NotesAndLoansReceivableNetNoncurrent	73000000	USD
CY2014	us-gaap	Operating Income Loss OperatingIncomeLoss	1590000000	USD
CY2015Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	461000000	USD
CY2015Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	204000000	USD
CY2015Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	440000000	USD
CY2015Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	134000000	USD
CY2015	us-gaap	Operating Income Loss OperatingIncomeLoss	1239000000	USD
CY2016Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	381000000	USD
CY2016Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	256000000	USD
CY2016Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	507000000	USD
CY2016Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	301000000	USD
CY2016	us-gaap	Operating Income Loss OperatingIncomeLoss	1445000000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	175000000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	33000000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	11000000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	13000000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	24000000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	28000000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	66000000	USD
CY2015Q4	us-gaap	Other Assets Current OtherAssetsCurrent	203000000	USD
CY2016Q4	us-gaap	Other Assets Current OtherAssetsCurrent	195000000	USD
CY2015Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	179000000	USD
CY2016Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	170000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-2000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-4000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	0	USD
CY2014	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-19000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	10000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	12000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	18000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-13000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-11000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	9000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-8000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-6000000	USD
CY2014	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	1000000	USD
CY2016	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	1000000	USD
CY2014	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	1000000	USD
CY2015	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	0	USD
CY2016	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	1000000	USD
CY2015Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	429000000	USD
CY2016Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	498000000	USD
CY2015Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	207000000	USD
CY2016Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	349000000	USD
CY2015Q4	us-gaap	Other Long Term Investments OtherLongTermInvestments	186000000	USD
CY2016Q4	us-gaap	Other Long Term Investments OtherLongTermInvestments	201000000	USD
CY2014	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	92000000	USD
CY2015	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	61000000	USD
CY2016	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	95000000	USD
CY2014	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	12000000	USD
CY2015	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	11000000	USD
CY2016	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	7000000	USD
CY2015Q4	us-gaap	Other Postretirement Defined Benefit Plan Liabilities Noncurrent OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent	228000000	USD
CY2016Q4	us-gaap	Other Postretirement Defined Benefit Plan Liabilities Noncurrent OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent	36000000	USD
CY2015Q4	us-gaap	Other Receivables Net Current OtherReceivablesNetCurrent	72000000	USD
CY2016Q4	us-gaap	Other Receivables Net Current OtherReceivablesNetCurrent	71000000	USD
CY2014	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	1000000	USD
CY2015	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	2000000	USD
CY2016	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	2000000	USD
CY2014	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Diluted ParticipatingSecuritiesDistributedAndUndistributedEarningsLossDiluted	1000000	USD
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CY2016	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding Options Weighted Average Remaining Contractual Term2 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2	P2Y7M17D
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CY2015Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	8795000000	USD
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CY2015Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	3000000	USD
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CY2015	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	179000000	shares
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CY2016	us-gaap	Description Of New Accounting Pronouncements Not Yet Adopted DescriptionOfNewAccountingPronouncementsNotYetAdopted	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-top:12px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;"></font><font style="font-family:inherit;font-size:10pt;font-weight:bold;">NEW ACCOUNTING PRONOUNCEMENTS</font></div><div style="line-height:120%;padding-top:12px;text-align:left;text-indent:16px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Recently Adopted Pronouncements</font></div><div style="line-height:120%;padding-top:12px;text-align:left;text-indent:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">In February 2015, the FASB issued ASU No. 2015-02, </font><font style="font-family:inherit;font-size:10pt;font-style:italic;">Amendments to the Consolidation Analysis</font><font style="font-family:inherit;font-size:10pt;">, which changes the analysis that a reporting entity must perform to determine whether it should consolidate certain types of legal entities. The ASU affects (1) limited partnerships and similar legal entities, (2) evaluating fees paid to a decision maker or a service provider as a variable interest, (3) the effect of fee arrangements on the primary beneficiary determination, (4) the effect of related parties on the primary beneficiary determination, and (5) certain investment funds. It is effective for the Registrants for the first interim period within annual reporting periods beginning after December 15, 2015. The Registrants adopted this ASU at January 1, 2016. The implementation of this guidance is reflected in </font><font style="font-family:inherit;font-size:10pt;">Note 1</font><font style="font-family:inherit;font-size:10pt;"> of the Consolidated Financial Statements, "</font><font style="font-family:inherit;font-size:10pt;">Organization and Basis of Presentation</font><font style="font-family:inherit;font-size:10pt;">." Certain entities are now deemed to be VIEs and are included in DTE Energy's non-consolidated VIE table. This implementation did not have a significant impact on the Registrants' Consolidated Financial Statements.</font></div><div style="line-height:120%;padding-top:12px;text-align:left;text-indent:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">In April 2015, the FASB issued ASU No. 2015-03, </font><font style="font-family:inherit;font-size:10pt;font-style:italic;">Simplifying the Presentation of Debt Issuance Costs</font><font style="font-family:inherit;font-size:10pt;">. This ASU requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. This ASU is effective for reporting periods beginning after December 15, 2015 and interim periods therein. It is to be applied retrospectively. The Registrants adopted this ASU at January 1, 2016. The implementation of this guidance is reflected in </font><font style="font-family:inherit;font-size:10pt;">Note 14</font><font style="font-family:inherit;font-size:10pt;"> of the Consolidated Financial Statements, "</font><font style="font-family:inherit;font-size:10pt;">Long-Term Debt</font><font style="font-family:inherit;font-size:10pt;">." The effect of the adoption decreased assets and liabilities on DTE Energy's and DTE Electric's Consolidated Statements of Financial Position by </font><font style="font-family:inherit;font-size:10pt;">$75 million</font><font style="font-family:inherit;font-size:10pt;"> and </font><font style="font-family:inherit;font-size:10pt;">$36 million</font><font style="font-family:inherit;font-size:10pt;">, respectively, at December 31, 2015.</font></div><div style="line-height:120%;padding-top:12px;text-align:left;text-indent:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">In May 2015, the FASB issued ASU 2015-07,</font><font style="font-family:inherit;font-size:10pt;font-style:italic;"> Fair Value Measurement (Topic 820): Disclosures for Investments in Certain Entities That Calculate Net Asset Value per Share (or Its Equivalent). </font><font style="font-family:inherit;font-size:10pt;">This guidance removes the requirement to categorize within the fair value hierarchy all investments for which fair value is measured using the net asset value per share (or its equivalent) practical expedient. The guidance applies to investments for which there is not a readily determinable fair value (market quote) or the investment is in a mutual fund without a publicly available net asset value. It is effective for the Registrants for the first interim period within annual reporting periods beginning after December 15, 2015. It is to be applied retrospectively. The Registrants adopted this ASU at January 1, 2016. The implementation of this guidance is reflected in </font><font style="font-family:inherit;font-size:10pt;">Notes 12 and 20</font><font style="font-family:inherit;font-size:10pt;"> to the Consolidated Financial Statements, "</font><font style="font-family:inherit;font-size:10pt;">Fair Value</font><font style="font-family:inherit;font-size:10pt;">" and "</font><font style="font-family:inherit;font-size:10pt;">Retirement Benefits and Trusteed Assets</font><font style="font-family:inherit;font-size:10pt;">," respectively. This implementation did not have a significant impact on the Registrants' Consolidated Financial Statements.</font></div><div style="line-height:120%;padding-top:12px;text-align:left;text-indent:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;color:#252525;">In March 2016, the FASB issued ASU No. 2016-09, </font><font style="font-family:inherit;font-size:10pt;color:#252525;font-style:italic;">Compensation</font><font style="font-family:inherit;font-size:10pt;font-style:italic;"> </font><font style="font-family:inherit;font-size:10pt;">— </font><font style="font-family:inherit;font-size:10pt;font-style:italic;">Stock Compensation (Topic 718): </font><font style="font-family:inherit;font-size:10pt;color:#252525;font-style:italic;">Improvements to Employee Share-Based Payment Accounting.</font><font style="font-family:inherit;font-size:10pt;color:#252525;"> The ASU simplifies several aspects of the accounting for share-based payment transactions, including income tax consequences, classification of awards as either equity or liabilities, and classification on the Consolidated Statements of Cash Flows. Under the new standard, income tax benefits and deficiencies are to be recognized in the income statement and the tax effects of exercised or vested awards should be treated as discrete items in the reporting period in which they occur. This provision is to be applied prospectively. Excess tax benefits should be recognized regardless of whether the benefit reduces taxes payable in the current period, along with any valuation allowance, on a modified retrospective basis as a cumulative-effect adjustment to the retained earnings as of the date of adoption. Excess tax benefits should be classified along with other income tax cash flows as an operating activity. This provision can be applied prospectively or retrospectively for all periods presented. </font><font style="font-family:inherit;font-size:10pt;">The standard is effective for public entities for annual reporting periods beginning after December 15, 2016, and interim periods therein. Effective July 1, 2016 DTE Energy elected to early adopt this standard, as permitted. As a result of the adoption, DTE Energy recognized </font><font style="font-family:inherit;font-size:10pt;">$1 million</font><font style="font-family:inherit;font-size:10pt;"> of excess tax benefits on stock-based compensation expense in its Consolidated Statements of Operations as a component of the provision for income taxes on a prospective basis. DTE Energy also recognized a </font><font style="font-family:inherit;font-size:10pt;">$3 million</font><font style="font-family:inherit;font-size:10pt;"> cumulative-effect adjustment to increase Retained earnings under the modified retrospective approach. While there was no impact to the current period, cash flows related to the excess tax benefits on DTE Energy's Consolidated Statements of Cash Flows will be classified as operating activities on a prospective basis. Due to the prospective election, prior period amounts have not been adjusted. In addition, cash paid on the employees’ behalf related to restricted shares withheld for tax purposes have been classified as a financing activity on a retrospective basis. For the </font><font style="font-family:inherit;font-size:10pt;">year ended December 31, 2016</font><font style="font-family:inherit;font-size:10pt;">, the implementation resulted in an increase to Net cash from operating activities with a corresponding decrease to Net cash from financing activities of </font><font style="font-family:inherit;font-size:10pt;">$4 million</font><font style="font-family:inherit;font-size:10pt;">. This retrospective application resulted in an increase to Net cash from operating activities with a corresponding decrease to Net cash from financing activities of </font><font style="font-family:inherit;font-size:10pt;">$5 million</font><font style="font-family:inherit;font-size:10pt;"> and </font><font style="font-family:inherit;font-size:10pt;">$6 million</font><font style="font-family:inherit;font-size:10pt;"> for the </font><font style="font-family:inherit;font-size:10pt;">years ended</font><font style="font-family:inherit;font-size:10pt;"> </font><font style="font-family:inherit;font-size:10pt;">December 31, 2015</font><font style="font-family:inherit;font-size:10pt;"> and </font><font style="font-family:inherit;font-size:10pt;">2014</font><font style="font-family:inherit;font-size:10pt;">, respectively. Finally, DTE Energy's stock compensation expense continues to reflect estimated forfeitures.</font></div><div style="line-height:120%;padding-top:12px;text-align:left;text-indent:16px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Recently Issued Pronouncements</font></div><div style="line-height:120%;padding-top:12px;text-align:left;text-indent:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">In May 2014, the FASB issued ASU No. 2014-09, </font><font style="font-family:inherit;font-size:10pt;font-style:italic;">Revenue from Contracts with Customers (Topic 606), </font><font style="font-family:inherit;font-size:10pt;">as amended</font><font style="font-family:inherit;font-size:10pt;font-style:italic;">.</font><font style="font-family:inherit;font-size:10pt;"> The objectives of this ASU are to improve upon revenue recognition requirements by providing a single comprehensive model to determine the measurement of revenue and timing of recognition. The core principle is that an entity will recognize revenue to depict the transfer of goods or services to customers at an amount that the entity expects to be entitled to in exchange for those goods or services. This ASU also requires expanded qualitative and quantitative disclosures regarding the nature, amount, timing, and uncertainty of revenues and cash flows arising from contracts with customers. The standard is effective for the first interim period within annual reporting periods beginning after December 15, 2017. The standard is to be applied retrospectively and early adoption is permitted in the preceding year. The Registrants do not plan to early adopt the standard. The Registrants are currently assessing the impact of the ASU, as amended, on their Consolidated Financial Statements as well as the transition method the Registrants will use to adopt the guidance. Specifically, the Registrants are considering whether the new guidance will affect accounting for certain contracts where collectibility is in question, contributions in aid of construction, and other utility industry-related areas.</font></div><div style="line-height:120%;padding-top:12px;text-align:left;text-indent:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">In July 2015, the FASB issued ASU No. 2015-11,</font><font style="font-family:inherit;font-size:10pt;font-style:italic;"> Inventory (Topic 330), Simplifying the Measurement of Inventory</font><font style="font-family:inherit;font-size:10pt;">. The ASU replaces the current lower of cost or market test with a lower of cost or net realizable value test when cost is determined on a first-in, first-out or average cost basis. The standard is effective for public entities for annual reporting periods beginning after December 15, 2016, and interim periods therein. It is to be applied prospectively and early adoption is permitted. The ASU will not have a significant impact on the Registrants' Consolidated Financial Statements.</font></div><div style="line-height:120%;padding-top:12px;text-align:left;text-indent:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">In January 2016, the FASB issued ASU No. 2016-01, </font><font style="font-family:inherit;font-size:10pt;font-style:italic;">Financial Instruments </font><font style="font-family:inherit;font-size:10pt;">— </font><font style="font-family:inherit;font-size:10pt;font-style:italic;">Overall: </font><font style="font-family:inherit;font-size:10pt;color:#252525;font-style:italic;">Recognition and Measurement of Financial Assets and Financial Liabilities. </font><font style="font-family:inherit;font-size:10pt;">The new guidance is intended to improve the recognition and measurement of financial instruments. The ASU primarily impacts accounting for equity investments in unconsolidated entities (other than those accounted for using the equity method of accounting) and financial liabilities under the fair value option. Under the new guidance, equity investments will generally be measured at fair value, with subsequent changes in fair value recognized in net income. The ASU is effective for fiscal years and interim periods within those years beginning after December 15, 2017. Upon adoption, entities will be required to make a cumulative-effect adjustment to the Statements of Financial Position as of the beginning of the first reporting period in which the guidance is effective. Changes to the accounting for equity securities without a readily determinable fair value will be applied prospectively. The ASU will not have a significant impact on the Registrants' Consolidated Financial Statements.</font></div><div style="line-height:120%;padding-top:12px;text-align:left;text-indent:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">In February 2016, the FASB issued ASU No. 2016-02, </font><font style="font-family:inherit;font-size:10pt;font-style:italic;">Leases (Topic 842), </font><font style="font-family:inherit;font-size:10pt;">a replacement of </font><font style="font-family:inherit;font-size:10pt;font-style:italic;">Leases (Topic 840)</font><font style="font-family:inherit;font-size:10pt;">. This guidance requires a lessee to account for leases as finance or operating leases. Both leases will result in the lessee recognizing a right-of-use asset and a corresponding lease liability on its balance sheet, with differing methodology for income statement recognition. For lessors, the standard modifies the classification criteria and the accounting for sales-type and direct financing leases. Entities will classify leases to determine how to recognize lease-related revenue and expense. This ASU is effective for public entities for fiscal years, and interim periods within those years, beginning after December 15, 2018, and early adoption is permitted. A modified retrospective approach is required for leases existing or entered into after the beginning of the earliest comparative period in the Consolidated Financial Statements. The Registrants expect an increase in assets and liabilities, however, they are currently assessing the impact of this ASU on their Consolidated Financial Statements.</font></div><div style="line-height:120%;padding-top:12px;text-align:left;text-indent:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">In June 2016, the FASB issued ASU No. 2016-13,</font><font style="font-family:inherit;font-size:10pt;font-style:italic;"> Financial Instruments </font><font style="font-family:inherit;font-size:10pt;">—</font><font style="font-family:inherit;font-size:10pt;font-style:italic;"> Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments</font><font style="font-family:inherit;font-size:10pt;">. The amendments in this update replace the incurred loss impairment methodology in current GAAP with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. Entities will apply the new guidance as a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is adopted. The ASU is effective for the Registrants beginning after December 15, 2019, and interim periods therein. Early adoption is permitted. The Registrants are currently assessing the impact of this standard on their Consolidated Financial Statements.</font></div><div style="line-height:120%;padding-top:12px;text-align:left;text-indent:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">In January 2017, the FASB issued ASU No. 2017-04, </font><font style="font-family:inherit;font-size:10pt;font-style:italic;">Intangibles </font><font style="font-family:inherit;font-size:10pt;">—</font><font style="font-family:inherit;font-size:10pt;font-style:italic;"> Goodwill and Other (Topic 350): Simplifying the Accounting for Goodwill Impairment</font><font style="font-family:inherit;font-size:10pt;">. The guidance removes Step 2 of the goodwill impairment test, which requires a hypothetical purchase price allocation. A goodwill impairment will now be the amount by which a reporting unit’s carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. The standard will be applied prospectively, and is effective for public entities that are SEC filers for annual or any interim goodwill impairment tests in fiscal years beginning after December 15, 2019. Early adoption is permitted for any impairment tests performed after January 1, 2017.</font></div></div>
CY2016	us-gaap	Derivatives Methods Of Accounting Nonhedging Derivatives DerivativesMethodsOfAccountingNonhedgingDerivatives	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-top:12px;text-align:left;text-indent:32px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Revenues and energy costs related to trading contracts are presented on a net basis in DTE Energy's Consolidated Statements of Operations. Commodity derivatives used for trading purposes, and financial non-trading commodity derivatives, are accounted for using the MTM method with unrealized and realized gains and losses recorded in Operating Revenues — Non-utility operations. Non-trading physical commodity sale and purchase derivative contracts are generally accounted for using the MTM method with unrealized and realized gains and losses for sales recorded in Operating Revenues — Non-utility operations and purchases recorded in Fuel, purchased power, and gas — non-utility.</font></div></div>
CY2016	us-gaap	Derivatives Reporting Of Derivative Activity DerivativesReportingOfDerivativeActivity	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-top:12px;text-align:left;text-indent:16px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Derivative Assets and Liabilities</font></div><div style="line-height:120%;padding-top:12px;text-align:left;text-indent:32px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Derivative assets and liabilities are comprised of physical and financial derivative contracts, including futures, forwards, options, and swaps that are both exchange-traded and over-the-counter traded contracts. Various inputs are used to value derivatives depending on the type of contract and availability of market data. Exchange-traded derivative contracts are valued using quoted prices in active markets. The Registrants consider the following criteria in determining whether a market is considered active: frequency in which pricing information is updated, variability in pricing between sources or over time, and the availability of public information. Other derivative contracts are valued based upon a variety of inputs including commodity market prices, broker quotes, interest rates, credit ratings, default rates, market-based seasonality, and basis differential factors. The Registrants monitor the prices that are supplied by brokers and pricing services and may use a supplemental price source or change the primary price source of an index if prices become unavailable or another price source is determined to be more representative of fair value. The Registrants have obtained an understanding of how these prices are derived. Additionally, the Registrants selectively corroborate the fair value of their transactions by comparison of market-based price sources. Mathematical valuation models are used for derivatives for which external market data is not readily observable, such as contracts which extend beyond the actively traded reporting period. The Registrants have established a Risk Management Committee whose responsibilities include directly or indirectly ensuring all valuation methods are applied in accordance with predefined policies. The development and maintenance of the Registrants' forward price curves has been assigned to DTE Energy's Risk Management Department, which is separate and distinct from the trading functions within DTE Energy.</font></div><div style="line-height:120%;padding-top:12px;text-align:left;text-indent:32px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"></font></div></div>
CY2016	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-top:12px;text-align:left;text-indent:32px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Certain prior year balances for the Registrants were reclassified to match the current year's Consolidated Financial Statements presentation. </font></div></div>

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2016 Form 10-K Financial Statement

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$DTE DTE ENERGY CO Stock $dte

2016 Form 10-K Financial Statement

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$DTE
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