$CNP
CENTERPOINT ENERGY INC Stock $cnp

$cnp Overview Financials Valuation SEC Filings Company Website

2015 Form 10-K Financial Statement

#000113031016000031 Filed on February 26, 2016

Income Statement

Concept	2015	2014 Q4	2014 Q3
Revenue	$7.386B	$2.372B	$1.807B
YoY Change	-19.94%	8.61%	10.18%
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	$970.0M	$229.0M	$293.0M
YoY Change	-4.24%	7.51%	18.15%
% of Gross Profit
Operating Expenses	$6.348B	$2.052B	$1.570B
YoY Change	-23.54%	1.23%	12.46%
Operating Profit	$933.0M	$221.0M	$233.0M
YoY Change	-0.21%	4.74%	-4.51%
Interest Expense	-$2.140B	-$119.0M	-$34.00M
YoY Change	2753.33%	12.26%	-342.86%
% of Operating Profit	-229.37%	-53.85%	-14.59%
Other Income/Expense, Net	-$2.063B	$8.000M	-$20.00M
YoY Change	4026.0%	-93.55%	33.33%
Pretax Income	-$1.130B	$209.0M	$213.0M
YoY Change	-227.68%	19.43%	-6.99%
Income Tax	-$438.0M	$33.00M	$70.00M
% Of Pretax Income		15.79%	32.86%
Net Earnings	-$692.0M	$176.0M	$143.0M
YoY Change	-213.26%	55.75%	-5.3%
Net Earnings / Revenue	-9.37%	7.42%	7.91%
Basic Earnings Per Share	-$1.61	$0.41	$0.33
Diluted Earnings Per Share	-$1.61	$0.41	$0.33
COMMON SHARES
Basic Shares Outstanding	430.2M shares	429.8M shares	429.8M shares
Diluted Shares Outstanding	430.2M shares		431.6M shares

Balance Sheet

Concept	2015	2014 Q4	2014 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$1.069B	$1.228B	$1.070B
YoY Change	-12.95%	25.95%	17.84%
Cash & Equivalents	$264.0M	$298.0M	$230.0M
Short-Term Investments	$805.0M	$930.0M	$840.0M
Other Short-Term Assets	$508.0M	$634.0M	$385.0M
YoY Change	-19.87%	15.9%	25.0%
Inventory	$347.0M	$379.0M	$409.0M
Prepaid Expenses
Receivables	$593.0M	$837.0M	$712.0M
Other Receivables	$172.0M	$190.0M	$0.00
Total Short-Term Assets	$2.689B	$3.268B	$2.576B
YoY Change	-17.72%	22.95%	11.08%
LONG-TERM ASSETS
Property, Plant & Equipment	$11.54B	$10.50B	$10.21B
YoY Change	9.86%	9.48%	8.73%
Goodwill		$840.0M	$840.0M
YoY Change		0.0%	0.0%
Intangibles
YoY Change
Long-Term Investments	$2.594B	$4.521B	$4.525B
YoY Change	-42.62%	0.07%	0.0%
Other Assets	$3.267B	$147.0M	$150.0M
YoY Change	-11.85%	-9.26%	7.14%
Total Long-Term Assets	$18.60B	$19.88B	$19.47B
YoY Change	-6.68%	106.7%	97.28%
TOTAL ASSETS
Total Short-Term Assets	$2.689B	$3.268B	$2.576B
Total Long-Term Assets	$18.60B	$19.88B	$19.47B
Total Assets	$21.29B	$23.15B	$22.05B
YoY Change	-8.23%	5.85%	2.19%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$483.0M	$716.0M	$441.0M
YoY Change	-32.54%	3.92%	21.15%
Accrued Expenses	$117.0M	$124.0M	$110.0M
YoY Change	-5.65%	0.0%	10.0%
Deferred Revenue
YoY Change
Short-Term Debt	$40.00M	$53.00M	$80.00M
YoY Change	-24.53%	23.26%	14.29%
Long-Term Debt Due	$864.0M	$795.0M	$722.0M
YoY Change	8.68%	59.96%	30.56%
Total Short-Term Liabilities	$2.458B	$2.792B	$3.008B
YoY Change	-29.27%	-7.52%	15.92%
LONG-TERM LIABILITIES
Long-Term Debt	$7.866B	$8.009B	$7.797B
YoY Change	-1.79%	2.46%	0.5%
Other Long-Term Liabilities	$2.458B	$251.0M	$207.0M
YoY Change	1.95%	22.44%	-17.53%
Total Long-Term Liabilities	$10.32B	$8.260B	$8.004B
YoY Change	-0.92%	23.19%	14.98%
TOTAL LIABILITIES
Total Short-Term Liabilities	$2.458B	$2.792B	$3.008B
Total Long-Term Liabilities	$10.32B	$8.260B	$8.004B
Total Liabilities	$17.83B	$11.05B	$11.01B
YoY Change	-4.41%	13.66%	15.24%
SHAREHOLDERS EQUITY
Retained Earnings		$461.0M	$387.0M
YoY Change		78.68%	66.09%
Common Stock		$4.000M	$4.000M
YoY Change		0.0%	0.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares		166.0 shares	166.0 shares
Shareholders Equity	$3.461B	$4.548B	$4.473B
YoY Change
Total Liabilities & Shareholders Equity	$21.29B	$23.20B	$22.05B
YoY Change	-8.23%	6.08%	2.19%

Cashflow Statement

Concept	2015	2014 Q4	2014 Q3
OPERATING ACTIVITIES
Net Income	-$692.0M	$176.0M	$143.0M
YoY Change	-213.26%	55.75%	-5.3%
Depreciation, Depletion And Amortization	$970.0M	$229.0M	$293.0M
YoY Change	-4.24%	7.51%	18.15%
Cash From Operating Activities	$1.870B	$273.0M	$412.0M
YoY Change	33.86%	-43.24%	20.47%
INVESTING ACTIVITIES
Capital Expenditures	-$1.584B	-$374.0M	-$373.0M
YoY Change	15.45%	0.0%	14.42%
Acquisitions	$0.00
YoY Change
Other Investing Activities	-$5.000M	$16.00M	$6.000M
YoY Change	-225.0%		-76.0%
Cash From Investing Activities	-$1.387B	-$358.0M	-$367.0M
YoY Change	0.22%	-4.28%	21.93%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net	$0.00
YoY Change	-100.0%
Debt Paid & Issued, Net	$644.0M
YoY Change	19.93%
Cash From Financing Activities	-$517.0M	153.0M	-21.00M
YoY Change	-771.43%	-229.66%	-93.42%
NET CHANGE
Cash From Operating Activities	$1.870B	273.0M	412.0M
Cash From Investing Activities	-$1.387B	-358.0M	-367.0M
Cash From Financing Activities	-$517.0M	153.0M	-21.00M
Net Change In Cash	-$34.00M	68.00M	24.00M
YoY Change	-137.78%	-718.18%	-108.63%
FREE CASH FLOW
Cash From Operating Activities	$1.870B	$273.0M	$412.0M
Capital Expenditures	-$1.584B	-$374.0M	-$373.0M
Free Cash Flow	$3.454B	$647.0M	$785.0M
YoY Change	24.74%	-24.33%	17.51%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2013	cnp	Amount Of Allowed Equity Return Recognized In Period AmountOfAllowedEquityReturnRecognizedInPeriod	45000000	USD
CY2014	cnp	Amount Of Allowed Equity Return Recognized In Period AmountOfAllowedEquityReturnRecognizedInPeriod	68000000	USD
CY2015	cnp	Amount Of Allowed Equity Return Recognized In Period AmountOfAllowedEquityReturnRecognizedInPeriod	49000000	USD
CY2015	cnp	Annualized Individual Discount Rates Based On Time Period Maximum AnnualizedIndividualDiscountRatesBasedOnTimePeriodMaximum	P99Y
CY2015	cnp	Annualized Individual Discount Rates Based On Time Period Minimum AnnualizedIndividualDiscountRatesBasedOnTimePeriodMinimum	P6M
CY2014Q4	cnp	Assets Noncurrent Other Than Property Plant And Equipment AssetsNoncurrentOtherThanPropertyPlantAndEquipment	9430000000	USD
CY2015Q4	cnp	Assets Noncurrent Other Than Property Plant And Equipment AssetsNoncurrentOtherThanPropertyPlantAndEquipment	7108000000	USD
CY2015	cnp	Basis Difference Amortization Period BasisDifferenceAmortizationPeriod	P33Y
CY2013	cnp	Capital Expendituresfor Long Lived Assets CapitalExpendituresforLongLivedAssets	1272000000	USD
CY2014	cnp	Capital Expendituresfor Long Lived Assets CapitalExpendituresforLongLivedAssets	1402000000	USD
CY2015	cnp	Capital Expendituresfor Long Lived Assets CapitalExpendituresforLongLivedAssets	1575000000	USD
CY2015Q4	cnp	Capital Stock Shares Authorized CapitalStockSharesAuthorized	1020000000	shares
CY2014Q4	cnp	Cash Collateral Posted With Counterparties CashCollateralPostedWithCounterparties	64000000	USD
CY2015Q4	cnp	Cash Collateral Posted With Counterparties CashCollateralPostedWithCounterparties	56000000	USD
CY2013	cnp	Cash Contributed CashContributed	38000000	USD
CY2014	cnp	Cash Contributed CashContributed	0	USD
CY2015	cnp	Cash Contributed CashContributed	0	USD
CY2014Q4	cnp	Deferred Income Tax Liability Reclassified To Noncurrent DeferredIncomeTaxLiabilityReclassifiedToNoncurrent	683000000	USD
CY2014Q4	cnp	Deferred Tax Assets Loss And Credit Tax Carryforwards DeferredTaxAssetsLossAndCreditTaxCarryforwards	69000000	USD
CY2015Q4	cnp	Deferred Tax Assets Loss And Credit Tax Carryforwards DeferredTaxAssetsLossAndCreditTaxCarryforwards	115000000	USD
CY2014Q4	cnp	Deferred Tax Assets Noncurrent Other DeferredTaxAssetsNoncurrentOther	35000000	USD
CY2015Q4	cnp	Deferred Tax Assets Noncurrent Other DeferredTaxAssetsNoncurrentOther	45000000	USD
CY2014Q4	cnp	Deferred Tax Liabilities Indexed Debt Securities Derivative DeferredTaxLiabilitiesIndexedDebtSecuritiesDerivative	65000000	USD
CY2015Q4	cnp	Deferred Tax Liabilities Indexed Debt Securities Derivative DeferredTaxLiabilitiesIndexedDebtSecuritiesDerivative	91000000	USD
CY2014Q4	cnp	Deferred Tax Liabilities Noncurrent Other DeferredTaxLiabilitiesNoncurrentOther	114000000	USD
CY2015Q4	cnp	Deferred Tax Liabilities Noncurrent Other DeferredTaxLiabilitiesNoncurrentOther	107000000	USD
CY2015	cnp	Defined Benefit Pension Plan Vesting Period DefinedBenefitPensionPlanVestingPeriod	P3Y
CY2015	cnp	Defined Benefit Plan Percentage Vested DefinedBenefitPlanPercentageVested	1.00
CY2015Q4	cnp	Defined Benefit Plan Retirement Benefit Eligible Earnings Increased Percentage DefinedBenefitPlanRetirementBenefitEligibleEarningsIncreasedPercentage	0.05
CY2015	cnp	Defined Benefit Plan Transition Obligation Amortization Period DefinedBenefitPlanTransitionObligationAmortizationPeriod	P20Y
CY2013	cnp	Distribution To Zens Holders DistributionToZENSHolders	0	USD
CY2014	cnp	Distribution To Zens Holders DistributionToZENSHolders	0	USD
CY2015	cnp	Distribution To Zens Holders DistributionToZENSHolders	32000000	USD
CY2013	cnp	Gain Loss On Indexed Debt Securities GainLossOnIndexedDebtSecurities	-193000000	USD
CY2014	cnp	Gain Loss On Indexed Debt Securities GainLossOnIndexedDebtSecurities	-86000000	USD
CY2015	cnp	Gain Loss On Indexed Debt Securities GainLossOnIndexedDebtSecurities	74000000	USD
CY2013	cnp	Income Tax Expense Benefit Related To Interest On Income Tax Positions IncomeTaxExpenseBenefitRelatedToInterestOnIncomeTaxPositions	-3000000	USD
CY2014	cnp	Income Tax Expense Benefit Related To Interest On Income Tax Positions IncomeTaxExpenseBenefitRelatedToInterestOnIncomeTaxPositions	3000000	USD
CY2013	cnp	Income Tax Reconciliation Change In Tax Expense IncomeTaxReconciliationChangeInTaxExpense	197000000	USD
CY2014	cnp	Income Tax Reconciliation Change In Tax Expense IncomeTaxReconciliationChangeInTaxExpense	-36000000	USD
CY2015	cnp	Income Tax Reconciliation Change In Tax Expense IncomeTaxReconciliationChangeInTaxExpense	-42000000	USD
CY2013	cnp	Income Tax Reconciliation Tax Settlements And Uncertain Income Tax Positions IncomeTaxReconciliationTaxSettlementsAndUncertainIncomeTaxPositions	-9000000	USD
CY2014	cnp	Income Tax Reconciliation Tax Settlements And Uncertain Income Tax Positions IncomeTaxReconciliationTaxSettlementsAndUncertainIncomeTaxPositions	0	USD
CY2015	cnp	Income Tax Reconciliation Tax Settlements And Uncertain Income Tax Positions IncomeTaxReconciliationTaxSettlementsAndUncertainIncomeTaxPositions	0	USD
CY2013	cnp	Increase Decrease Interest And Taxes Accrued IncreaseDecreaseInterestAndTaxesAccrued	41000000	USD
CY2014	cnp	Increase Decrease Interest And Taxes Accrued IncreaseDecreaseInterestAndTaxesAccrued	-23000000	USD
CY2015	cnp	Increase Decrease Interest And Taxes Accrued IncreaseDecreaseInterestAndTaxesAccrued	-10000000	USD
CY2013	cnp	Increasedecreaseintaxexpenseduetoformationofmidstreampartnership Increasedecreaseintaxexpenseduetoformationofmidstreampartnership	196000000	USD
CY2014	cnp	Increasedecreaseintaxexpenseduetoformationofmidstreampartnership Increasedecreaseintaxexpenseduetoformationofmidstreampartnership	0	USD
CY2015	cnp	Increasedecreaseintaxexpenseduetoformationofmidstreampartnership Increasedecreaseintaxexpenseduetoformationofmidstreampartnership	0	USD
CY2014Q4	cnp	Indexed Debt Current IndexedDebtCurrent	152000000	USD
CY2015Q4	cnp	Indexed Debt Current IndexedDebtCurrent	154000000	USD
CY2014Q4	cnp	Indexed Debt Securities Derivative IndexedDebtSecuritiesDerivative	541000000	USD
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CY2013	cnp	Indexed Debt Securities Gain Loss IndexedDebtSecuritiesGainLoss	-193000000	USD
CY2014	cnp	Indexed Debt Securities Gain Loss IndexedDebtSecuritiesGainLoss	-86000000	USD
CY2015	cnp	Indexed Debt Securities Gain Loss IndexedDebtSecuritiesGainLoss	74000000	USD
CY2013	cnp	Interest On Transition And System Restoration Bonds InterestOnTransitionAndSystemRestorationBonds	133000000	USD
CY2014	cnp	Interest On Transition And System Restoration Bonds InterestOnTransitionAndSystemRestorationBonds	118000000	USD
CY2015	cnp	Interest On Transition And System Restoration Bonds InterestOnTransitionAndSystemRestorationBonds	105000000	USD
CY2015	cnp	Maximum Number Of Times Annual Salary Included In Severance Benefits MaximumNumberOfTimesAnnualSalaryIncludedInSeveranceBenefits	3
CY2015Q4	cnp	Percentage Of Investment In Company Common Stock PercentageOfInvestmentInCompanyCommonStock	0.17
CY2015	cnp	Realized Loss On Indexed Debt Securities RealizedLossOnIndexedDebtSecurities	7000000	USD
CY2013	cnp	Redemptionof Indexed Debt Securities RedemptionofIndexedDebtSecurities	8000000	USD
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CY2015Q4	cnp	Transition And System Restoration Bonds Long Term Debt Current TransitionAndSystemRestorationBondsLongTermDebtCurrent	391000000	USD
CY2014Q4	cnp	Transition And System Restoration Bonds Long Term Debt Non Current TransitionAndSystemRestorationBondsLongTermDebtNonCurrent	2674000000	USD
CY2015Q4	cnp	Transition And System Restoration Bonds Long Term Debt Non Current TransitionAndSystemRestorationBondsLongTermDebtNonCurrent	2283000000	USD
CY2014Q4	cnp	Unrecognized Equity Return UnrecognizedEquityReturn	442000000	USD
CY2015Q4	cnp	Unrecognized Equity Return UnrecognizedEquityReturn	393000000	USD
CY2012Q4	cnp	Unrecognized Tax Expense UnrecognizedTaxExpense	23000000	USD
CY2015	dei	Amendment Flag AmendmentFlag	false
CY2015	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2015	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2015	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2015
CY2015	dei	Document Period End Date DocumentPeriodEndDate	2015-12-31
CY2015	dei	Document Type DocumentType	10-K
CY2015	dei	Entity Central Index Key EntityCentralIndexKey	0001130310
CY2016Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	430271749	shares
CY2015	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2015	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2015Q2	dei	Entity Public Float EntityPublicFloat	8146639191	USD
CY2015	dei	Entity Registrant Name EntityRegistrantName	CENTERPOINT ENERGY INC
CY2015	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2015	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
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CY2014Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	4856000000	USD
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CY2013	us-gaap	Adjustment For Amortization AdjustmentForAmortization	423000000	USD
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CY2014Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	26000000	USD
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CY2013	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	30000000	USD
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CY2013Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	134000000	USD
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CY2015Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	195000000	USD
CY2014	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	5000000	USD
CY2015	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	6000000	USD
CY2014	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	37000000	USD
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CY2013Q4	us-gaap	Assets Assets	21870000000	USD
CY2014Q4	us-gaap	Assets Assets	23200000000	USD
CY2015Q4	us-gaap	Assets Assets	21334000000	USD
CY2014Q4	us-gaap	Assets Current AssetsCurrent	3268000000	USD
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CY2014Q4	us-gaap	Assets Fair Value Disclosure Recurring AssetsFairValueDisclosureRecurring	1117000000	USD
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CY2013	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	74000000	USD
CY2014	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	104000000	USD
CY2015	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	95000000	USD
CY2012Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	646000000	USD
CY2013Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	208000000	USD
CY2014Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	298000000	USD
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CY2015Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2013	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.83
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CY2013Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
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CY2013	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	356000000	USD
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CY2015	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-672000000	USD
CY2013	us-gaap	Contribution Of Property ContributionOfProperty	4252000000	USD
CY2014	us-gaap	Contribution Of Property ContributionOfProperty	0	USD
CY2015	us-gaap	Contribution Of Property ContributionOfProperty	0	USD
CY2013	us-gaap	Cost Of Natural Gas Purchases CostOfNaturalGasPurchases	3908000000	USD
CY2014	us-gaap	Cost Of Natural Gas Purchases CostOfNaturalGasPurchases	4921000000	USD
CY2015	us-gaap	Cost Of Natural Gas Purchases CostOfNaturalGasPurchases	3102000000	USD
CY2013	us-gaap	Costs And Expenses CostsAndExpenses	7096000000	USD
CY2014	us-gaap	Costs And Expenses CostsAndExpenses	8291000000	USD
CY2015	us-gaap	Costs And Expenses CostsAndExpenses	6453000000	USD
CY2014Q4	us-gaap	Credit Risk Derivative Assets At Fair Value CreditRiskDerivativeAssetsAtFairValue	131000000	USD
CY2015Q4	us-gaap	Credit Risk Derivative Assets At Fair Value CreditRiskDerivativeAssetsAtFairValue	125000000	USD
CY2013	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	91000000	USD
CY2014	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-20000000	USD
CY2015	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-37000000	USD
CY2013	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	114000000	USD
CY2014	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-6000000	USD
CY2015	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-25000000	USD
CY2013	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	23000000	USD
CY2014	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	14000000	USD
CY2015	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	12000000	USD
CY2014Q4	us-gaap	Debt Current DebtCurrent	848000000	USD
CY2015Q4	us-gaap	Debt Current DebtCurrent	913000000	USD
CY2014Q4	us-gaap	Debt Instrument Unamortized Discount Premium Net DebtInstrumentUnamortizedDiscountPremiumNet	50000000	USD
CY2015Q4	us-gaap	Debt Instrument Unamortized Discount Premium Net DebtInstrumentUnamortizedDiscountPremiumNet	42000000	USD
CY2013	us-gaap	Deferred Compensation Arrangement With Individual Compensation Expense DeferredCompensationArrangementWithIndividualCompensationExpense	5000000	USD
CY2014	us-gaap	Deferred Compensation Arrangement With Individual Compensation Expense DeferredCompensationArrangementWithIndividualCompensationExpense	5000000	USD
CY2015	us-gaap	Deferred Compensation Arrangement With Individual Compensation Expense DeferredCompensationArrangementWithIndividualCompensationExpense	3000000	USD
CY2013	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	370000000	USD
CY2014	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	273000000	USD
CY2015	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-359000000	USD
CY2013	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	356000000	USD
CY2014	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	280000000	USD
CY2015	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-413000000	USD
CY2014Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	5954000000	USD
CY2015Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	5612000000	USD
CY2013	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-14000000	USD
CY2014	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	7000000	USD
CY2015	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-54000000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	514000000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	565000000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	347000000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	334000000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Asset Retirement Obligations DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAssetRetirementObligations	65000000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Asset Retirement Obligations DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAssetRetirementObligations	73000000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	2000000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	2000000	USD
CY2014Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	5440000000	USD
CY2015Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	5047000000	USD
CY2013Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssets	225000000	USD
CY2014Q4	us-gaap	Deferred Tax Liabilities Investment In Noncontrolled Affiliates DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates	1788000000	USD
CY2015Q4	us-gaap	Deferred Tax Liabilities Investment In Noncontrolled Affiliates DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates	1277000000	USD
CY2014Q4	us-gaap	Deferred Tax Liabilities Investments DeferredTaxLiabilitiesInvestments	636000000	USD
CY2015Q4	us-gaap	Deferred Tax Liabilities Investments DeferredTaxLiabilitiesInvestments	654000000	USD
CY2014Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	5440000000	USD
CY2015Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	5047000000	USD
CY2014Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	2126000000	USD
CY2015Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	2423000000	USD
CY2014Q4	us-gaap	Deferred Tax Liabilities Regulatory Assets And Liabilities DeferredTaxLiabilitiesRegulatoryAssetsAndLiabilities	1225000000	USD
CY2015Q4	us-gaap	Deferred Tax Liabilities Regulatory Assets And Liabilities DeferredTaxLiabilitiesRegulatoryAssetsAndLiabilities	1060000000	USD
CY2015	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Decrease On Accumulated Postretirement Benefit Obligation1 DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnAccumulatedPostretirementBenefitObligation1	10000000	USD
CY2015	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Decrease On Service And Interest Cost Components1 DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnServiceAndInterestCostComponents1	1000000	USD
CY2015	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Increase On Accumulated Postretirement Benefit Obligation DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnAccumulatedPostretirementBenefitObligation	12000000	USD
CY2015	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Increase On Service And Interest Cost Components DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnServiceAndInterestCostComponents	1000000	USD
CY2013	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	38000000	USD
CY2014	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	39000000	USD
CY2015	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	35000000	USD
CY2015	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent DefinedContributionPlanEmployerMatchingContributionPercent	0.06
CY2015	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent Of Match DefinedContributionPlanEmployerMatchingContributionPercentOfMatch	1
CY2015	us-gaap	Defined Contribution Plan Maximum Annual Contributions Per Employee Percent DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent	0.5
CY2013	us-gaap	Depreciation Depreciation	531000000	USD
CY2014	us-gaap	Depreciation Depreciation	521000000	USD
CY2015	us-gaap	Depreciation Depreciation	557000000	USD
CY2013	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	954000000	USD
CY2014	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	1013000000	USD
CY2015	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	970000000	USD
CY2014Q4	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	18000000	USD
CY2015Q4	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	15000000	USD
CY2014Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	99000000	USD
CY2015Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	89000000	USD
CY2014Q4	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	32000000	USD
CY2015Q4	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	36000000	USD
CY2014Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	149000000	USD
CY2015Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	140000000	USD
CY2014Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	643000000	USD
CY2015Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	529000000	USD
CY2013	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	-172000000	USD
CY2014	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	-40000000	USD
CY2015	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	103000000	USD
CY2014Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	19000000	USD
CY2015Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	11000000	USD
CY2014Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	1000000	USD
CY2015Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	5000000	USD
CY2014Q4	us-gaap	Derivative Liability Fair Value Gross Asset DerivativeLiabilityFairValueGrossAsset	82000000	USD
CY2015Q4	us-gaap	Derivative Liability Fair Value Gross Asset DerivativeLiabilityFairValueGrossAsset	71000000	USD
CY2014Q4	us-gaap	Derivative Net Liability Position Aggregate Fair Value DerivativeNetLiabilityPositionAggregateFairValue	2000000	USD
CY2015Q4	us-gaap	Derivative Net Liability Position Aggregate Fair Value DerivativeNetLiabilityPositionAggregateFairValue	3000000	USD
CY2013	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.73
CY2014Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.43
CY2014Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.25
CY2014Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.33
CY2014Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.41
CY2014	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.42
CY2015Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.30
CY2015Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.18
CY2015Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.91
CY2015Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.18
CY2015	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.61
CY2013	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.72
CY2014Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.43
CY2014Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.25
CY2014Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.33
CY2014Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.41
CY2014	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.42
CY2015Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.30
CY2015Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.18
CY2015Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.91
CY2015Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.18
CY2015	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.61
CY2013	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.602
CY2014	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.310
CY2015	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.388
CY2013	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350
CY2014	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350
CY2015	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350
CY2013	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	0	USD
CY2014	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	0	USD
CY2015	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	0	USD
CY2013	us-gaap	Employee Service Share Based Compensation Cash Received From Exercise Of Stock Options EmployeeServiceShareBasedCompensationCashReceivedFromExerciseOfStockOptions	3000000	USD
CY2014	us-gaap	Employee Service Share Based Compensation Cash Received From Exercise Of Stock Options EmployeeServiceShareBasedCompensationCashReceivedFromExerciseOfStockOptions	1000000	USD
CY2013	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	7000000	USD
CY2014	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	7000000	USD
CY2015	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	6000000	USD
CY2013	us-gaap	Employee Service Share Based Compensation Tax Benefit Realized From Exercise Of Stock Options EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromExerciseOfStockOptions	13000000	USD
CY2014	us-gaap	Employee Service Share Based Compensation Tax Benefit Realized From Exercise Of Stock Options EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromExerciseOfStockOptions	13000000	USD
CY2015	us-gaap	Employee Service Share Based Compensation Tax Benefit Realized From Exercise Of Stock Options EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromExerciseOfStockOptions	6000000	USD
CY2013	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	129000000	USD
CY2014	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	305000000	USD
CY2015	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	294000000	USD
CY2014Q4	us-gaap	Equity Method Investments EquityMethodInvestments	4521000000	USD
CY2015Q4	us-gaap	Equity Method Investments EquityMethodInvestments	2594000000	USD
CY2015Q4	us-gaap	Fair Value Assets Level1 To Level2 Transfers Amount FairValueAssetsLevel1ToLevel2TransfersAmount	0	USD
CY2015Q4	us-gaap	Fair Value Assets Level2 To Level1 Transfers Amount FairValueAssetsLevel2ToLevel1TransfersAmount	0	USD
CY2013	us-gaap	Fair Value Assets Measured On Recurring Basis Change In Unrealized Gain Loss FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss	2000000	USD
CY2014	us-gaap	Fair Value Assets Measured On Recurring Basis Change In Unrealized Gain Loss FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss	16000000	USD
CY2015	us-gaap	Fair Value Assets Measured On Recurring Basis Change In Unrealized Gain Loss FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss	6000000	USD
CY2015Q4	us-gaap	Fair Value Liabilities Level1 To Level2 Transfers Amount FairValueLiabilitiesLevel1ToLevel2TransfersAmount	0	USD
CY2015Q4	us-gaap	Fair Value Liabilities Level2 To Level1 Transfers Amount FairValueLiabilitiesLevel2ToLevel1TransfersAmount	0	USD
CY2013	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Gain Loss Included In Earnings FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings	3000000	USD
CY2014	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Gain Loss Included In Earnings FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings	14000000	USD
CY2015	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Gain Loss Included In Earnings FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings	7000000	USD
CY2013	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Settlements FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements	3000000	USD
CY2014	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Settlements FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements	-1000000	USD
CY2015	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Settlements FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements	12000000	USD
CY2013	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Transfers Into Level3 FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersIntoLevel3	1000000	USD
CY2014	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Transfers Into Level3 FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersIntoLevel3	-1000000	USD
CY2015	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Transfers Into Level3 FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersIntoLevel3	1000000	USD
CY2013	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Transfers Out Of Level3 FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersOutOfLevel3	0	USD
CY2014	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Transfers Out Of Level3 FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersOutOfLevel3	0	USD
CY2015	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Transfers Out Of Level3 FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersOutOfLevel3	1000000	USD
CY2012Q4	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis With Unobservable Inputs FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs	2000000	USD
CY2013Q4	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis With Unobservable Inputs FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs	3000000	USD
CY2014Q4	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis With Unobservable Inputs FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs	17000000	USD
CY2015Q4	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis With Unobservable Inputs FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs	12000000	USD
CY2014Q4	us-gaap	Goodwill Goodwill	840000000	USD
CY2015Q4	us-gaap	Goodwill Goodwill	840000000	USD
CY2013	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	781000000	USD
CY2014	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	885000000	USD
CY2015	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-1130000000	USD
CY2013	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	188000000	USD
CY2014	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	308000000	USD
CY2015	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-1633000000	USD
CY2013	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	58000000	USD
CY2014	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	2000000	USD
CY2015	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-1779000000	USD
CY2013	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	470000000	USD
CY2014	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	274000000	USD
CY2015	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-438000000	USD
CY2013	us-gaap	Income Tax Expense Benefit Continuing Operations Adjustment Of Deferred Tax Asset Liability IncomeTaxExpenseBenefitContinuingOperationsAdjustmentOfDeferredTaxAssetLiability	0	USD
CY2014	us-gaap	Income Tax Expense Benefit Continuing Operations Adjustment Of Deferred Tax Asset Liability IncomeTaxExpenseBenefitContinuingOperationsAdjustmentOfDeferredTaxAssetLiability	-29000000	USD
CY2015	us-gaap	Income Tax Expense Benefit Continuing Operations Adjustment Of Deferred Tax Asset Liability IncomeTaxExpenseBenefitContinuingOperationsAdjustmentOfDeferredTaxAssetLiability	0	USD
CY2013	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	273000000	USD
CY2014	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	310000000	USD
CY2015	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-396000000	USD
CY2013	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-11000000	USD
CY2014	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-23000000	USD
CY2015	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-15000000	USD
CY2013	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	21000000	USD
CY2014	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	16000000	USD
CY2015	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-27000000	USD
CY2013	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	35000000	USD
CY2014	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	192000000	USD
CY2015	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-45000000	USD
CY2014Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	190000000	USD
CY2015Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	172000000	USD
CY2013	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	256000000	USD
CY2014	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	-39000000	USD
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CY2013	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	152000000	USD
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CY2015	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-224000000	USD
CY2014	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	5000000	USD
CY2014	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	32000000	USD
CY2013	us-gaap	Increase Decrease In Derivative Assets And Liabilities IncreaseDecreaseInDerivativeAssetsAndLiabilities	-4000000	USD
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CY2014	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	8000000	USD
CY2013	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	-7000000	USD
CY2014	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	190000000	USD
CY2015	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	-18000000	USD
CY2013	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	22000000	USD
CY2014	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	102000000	USD
CY2015	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-28000000	USD
CY2013	us-gaap	Increase Decrease In Margin Deposits Outstanding IncreaseDecreaseInMarginDepositsOutstanding	-16000000	USD
CY2014	us-gaap	Increase Decrease In Margin Deposits Outstanding IncreaseDecreaseInMarginDepositsOutstanding	79000000	USD
CY2015	us-gaap	Increase Decrease In Margin Deposits Outstanding IncreaseDecreaseInMarginDepositsOutstanding	4000000	USD
CY2013	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	2000000	USD
CY2014	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	-1000000	USD
CY2015	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	-10000000	USD
CY2013	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	21000000	USD
CY2014	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	-20000000	USD
CY2015	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	-50000000	USD
CY2013	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	24000000	USD
CY2014	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	-9000000	USD
CY2015	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	5000000	USD
CY2013	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	20000000	USD
CY2014	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	41000000	USD
CY2015	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	8000000	USD
CY2013	us-gaap	Increase Decrease In Over Under Energy Recovery IncreaseDecreaseInOverUnderEnergyRecovery	-108000000	USD
CY2014	us-gaap	Increase Decrease In Over Under Energy Recovery IncreaseDecreaseInOverUnderEnergyRecovery	41000000	USD
CY2015	us-gaap	Increase Decrease In Over Under Energy Recovery IncreaseDecreaseInOverUnderEnergyRecovery	-43000000	USD
CY2013	us-gaap	Increase Decrease In Regulatory Assets And Liabilities IncreaseDecreaseInRegulatoryAssetsAndLiabilities	-61000000	USD
CY2014	us-gaap	Increase Decrease In Regulatory Assets And Liabilities IncreaseDecreaseInRegulatoryAssetsAndLiabilities	-22000000	USD
CY2015	us-gaap	Increase Decrease In Regulatory Assets And Liabilities IncreaseDecreaseInRegulatoryAssetsAndLiabilities	-63000000	USD
CY2013	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	-17000000	USD
CY2014	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	7000000	USD
CY2015	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	-12000000	USD
CY2013	us-gaap	Interest And Debt Expense InterestAndDebtExpense	351000000	USD
CY2014	us-gaap	Interest And Debt Expense InterestAndDebtExpense	353000000	USD
CY2015	us-gaap	Interest And Debt Expense InterestAndDebtExpense	352000000	USD
CY2013	us-gaap	Interest Costs Incurred Capitalized InterestCostsIncurredCapitalized	11000000	USD
CY2014	us-gaap	Interest Costs Incurred Capitalized InterestCostsIncurredCapitalized	11000000	USD
CY2015	us-gaap	Interest Costs Incurred Capitalized InterestCostsIncurredCapitalized	10000000	USD
CY2013	us-gaap	Interest Paid Net InterestPaidNet	475000000	USD
CY2014	us-gaap	Interest Paid Net InterestPaidNet	434000000	USD
CY2015	us-gaap	Interest Paid Net InterestPaidNet	426000000	USD
CY2014Q4	us-gaap	Interest Payable Current InterestPayableCurrent	124000000	USD
CY2015Q4	us-gaap	Interest Payable Current InterestPayableCurrent	117000000	USD
CY2013	us-gaap	Inventory Write Down InventoryWriteDown	4000000	USD
CY2014	us-gaap	Inventory Write Down InventoryWriteDown	8000000	USD
CY2015	us-gaap	Inventory Write Down InventoryWriteDown	4000000	USD
CY2013	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	21000000	USD
CY2014	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	11000000	USD
CY2015	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	9000000	USD
CY2014Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	23200000000	USD
CY2015Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	21334000000	USD
CY2014Q4	us-gaap	Liabilities Current LiabilitiesCurrent	2792000000	USD
CY2015Q4	us-gaap	Liabilities Current LiabilitiesCurrent	2467000000	USD
CY2014Q4	us-gaap	Liabilities Fair Value Disclosure Recurring LiabilitiesFairValueDisclosureRecurring	561000000	USD
CY2015Q4	us-gaap	Liabilities Fair Value Disclosure Recurring LiabilitiesFairValueDisclosureRecurring	458000000	USD
CY2014Q4	us-gaap	Liabilities Other Than Longterm Debt Noncurrent LiabilitiesOtherThanLongtermDebtNoncurrent	7851000000	USD
CY2015Q4	us-gaap	Liabilities Other Than Longterm Debt Noncurrent LiabilitiesOtherThanLongtermDebtNoncurrent	7505000000	USD
CY2014Q4	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	2100000000	USD
CY2015Q4	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	2100000000	USD
CY2014Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	795000000	USD
CY2015Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	873000000	USD
CY2014Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	8009000000	USD
CY2015Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	7901000000	USD
CY2014Q4	us-gaap	Marketable Securities Current MarketableSecuritiesCurrent	930000000	USD
CY2015Q4	us-gaap	Marketable Securities Current MarketableSecuritiesCurrent	805000000	USD
CY2013	us-gaap	Marketable Securities Gain Loss MarketableSecuritiesGainLoss	236000000	USD
CY2014	us-gaap	Marketable Securities Gain Loss MarketableSecuritiesGainLoss	163000000	USD
CY2015	us-gaap	Marketable Securities Gain Loss MarketableSecuritiesGainLoss	-93000000	USD
CY2013	us-gaap	Marketable Securities Unrealized Gain Loss Excluding Other Than Temporary Impairments MarketableSecuritiesUnrealizedGainLossExcludingOtherThanTemporaryImpairments	236000000	USD
CY2014	us-gaap	Marketable Securities Unrealized Gain Loss Excluding Other Than Temporary Impairments MarketableSecuritiesUnrealizedGainLossExcludingOtherThanTemporaryImpairments	163000000	USD
CY2015	us-gaap	Marketable Securities Unrealized Gain Loss Excluding Other Than Temporary Impairments MarketableSecuritiesUnrealizedGainLossExcludingOtherThanTemporaryImpairments	-93000000	USD
CY2013	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-751000000	USD
CY2014	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	77000000	USD
CY2015	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-512000000	USD
CY2013	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-1300000000	USD
CY2014	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-1384000000	USD
CY2015	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-1387000000	USD
CY2013	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	1613000000	USD
CY2014	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	1397000000	USD
CY2015	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	1865000000	USD
CY2013	us-gaap	Net Income Loss NetIncomeLoss	311000000	USD
CY2014Q1	us-gaap	Net Income Loss NetIncomeLoss	185000000	USD
CY2014Q2	us-gaap	Net Income Loss NetIncomeLoss	107000000	USD
CY2014Q3	us-gaap	Net Income Loss NetIncomeLoss	143000000	USD
CY2014Q4	us-gaap	Net Income Loss NetIncomeLoss	176000000	USD
CY2014	us-gaap	Net Income Loss NetIncomeLoss	611000000	USD
CY2015Q1	us-gaap	Net Income Loss NetIncomeLoss	131000000	USD
CY2015Q2	us-gaap	Net Income Loss NetIncomeLoss	77000000	USD
CY2015Q3	us-gaap	Net Income Loss NetIncomeLoss	-391000000	USD
CY2015Q4	us-gaap	Net Income Loss NetIncomeLoss	-509000000	USD
CY2015	us-gaap	Net Income Loss NetIncomeLoss	-692000000	USD
CY2014Q4	us-gaap	Net Regulatory Assets NetRegulatoryAssets	2321000000	USD
CY2015Q4	us-gaap	Net Regulatory Assets NetRegulatoryAssets	1853000000	USD
CY2013	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-229000000	USD
CY2014	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-50000000	USD
CY2015	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-2063000000	USD
CY2014Q4	us-gaap	Notes Receivable Related Parties Noncurrent NotesReceivableRelatedPartiesNoncurrent	363000000	USD
CY2015Q4	us-gaap	Notes Receivable Related Parties Noncurrent NotesReceivableRelatedPartiesNoncurrent	363000000	USD
CY2013	us-gaap	Operating Income Loss OperatingIncomeLoss	1010000000	USD
CY2014Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	295000000	USD
CY2014Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	186000000	USD
CY2014Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	233000000	USD
CY2014Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	221000000	USD
CY2014	us-gaap	Operating Income Loss OperatingIncomeLoss	935000000	USD
CY2015Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	256000000	USD
CY2015Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	186000000	USD
CY2015Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	265000000	USD
CY2015Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	226000000	USD
CY2015	us-gaap	Operating Income Loss OperatingIncomeLoss	933000000	USD
CY2015Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	24000000	USD
CY2015Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	5000000	USD
CY2015Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	2000000	USD
CY2015Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	3000000	USD
CY2015Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	3000000	USD
CY2015Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	4000000	USD
CY2015Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	7000000	USD
CY2014Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	147000000	USD
CY2015Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	146000000	USD
CY2013	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	-44000000	USD
CY2014	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	-3000000	USD
CY2015	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	-20000000	USD
CY2013	us-gaap	Other Comprehensive Income Defined Benefit Plans Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansTaxPortionAttributableToParent	-25000000	USD
CY2014	us-gaap	Other Comprehensive Income Defined Benefit Plans Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansTaxPortionAttributableToParent	-5000000	USD
CY2015	us-gaap	Other Comprehensive Income Defined Benefit Plans Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansTaxPortionAttributableToParent	-12000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Before Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax	2000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Before Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax	1000000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	45000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	4000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	20000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments And Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsAndTax	3000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments And Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsAndTax	-21000000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-1000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-1000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	0	USD
CY2014	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax	11000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax	11000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-9000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-10000000	USD
CY2014Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	383000000	USD
CY2015Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	343000000	USD
CY2014Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	251000000	USD
CY2015Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	273000000	USD
CY2014Q4	us-gaap	Other Long Term Debt Current OtherLongTermDebtCurrent	271000000	USD
CY2015Q4	us-gaap	Other Long Term Debt Current OtherLongTermDebtCurrent	328000000	USD
CY2014Q4	us-gaap	Other Long Term Debt Noncurrent OtherLongTermDebtNoncurrent	5335000000	USD
CY2015Q4	us-gaap	Other Long Term Debt Noncurrent OtherLongTermDebtNoncurrent	5618000000	USD
CY2013	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	24000000	USD
CY2014	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	36000000	USD
CY2015	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	46000000	USD
CY2013	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	24000000	USD
CY2014	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	13000000	USD
CY2015	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	22000000	USD
CY2013	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	2000000	USD
CY2014	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	4000000	USD
CY2015	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-5000000	USD
CY2013	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	7000000	USD
CY2014	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	1000000	USD
CY2015	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	0	USD
CY2013	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	3000000	USD
CY2014	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	8000000	USD
CY2015	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	0	USD
CY2013	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	355000000	USD
CY2014	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	408000000	USD
CY2015	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	426000000	USD
CY2013	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	0	USD
CY2014	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	1000000	USD
CY2015	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	0	USD
CY2013	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	1286000000	USD
CY2014	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	1372000000	USD
CY2015	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	1584000000	USD
CY2014Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	953000000	USD
CY2015Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	904000000	USD
CY2013	us-gaap	Pension Contributions PensionContributions	91000000	USD
CY2014	us-gaap	Pension Contributions PensionContributions	97000000	USD
CY2015	us-gaap	Pension Contributions PensionContributions	66000000	USD
CY2013	us-gaap	Postemployment Benefits Period Expense PostemploymentBenefitsPeriodExpense	4000000	USD
CY2014	us-gaap	Postemployment Benefits Period Expense PostemploymentBenefitsPeriodExpense	3000000	USD
CY2015	us-gaap	Postemployment Benefits Period Expense PostemploymentBenefitsPeriodExpense	2000000	USD
CY2013Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2014Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2015Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2013Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	20000000	shares
CY2014Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	20000000	shares
CY2015Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	20000000	shares
CY2013Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2014Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2015Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2014Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	178000000	USD
CY2015Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	140000000	USD
CY2013	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	0	USD
CY2015Q1	us-gaap	Revenues Revenues	2433000000	USD
CY2015Q2	us-gaap	Revenues Revenues	1532000000	USD
CY2015Q3	us-gaap	Revenues Revenues	1630000000	USD
CY2014	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	0	USD
CY2015	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	148000000	USD
CY2013	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	4000000	USD
CY2014	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1000000	USD
CY2015	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	USD
CY2013	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	1050000000	USD
CY2014	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	600000000	USD
CY2015	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
CY2013	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	0	USD
CY2014	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	0	USD
CY2015	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	200000000	USD
CY2013	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	18000000	USD
CY2014	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	6000000	USD
CY2015	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	0	USD
CY2013	us-gaap	Proceeds From Repayments Of Commercial Paper ProceedsFromRepaymentsOfCommercialPaper	118000000	USD
CY2014	us-gaap	Proceeds From Repayments Of Commercial Paper ProceedsFromRepaymentsOfCommercialPaper	414000000	USD
CY2015	us-gaap	Proceeds From Repayments Of Commercial Paper ProceedsFromRepaymentsOfCommercialPaper	403000000	USD
CY2013	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	5000000	USD
CY2014	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	10000000	USD
CY2015	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-13000000	USD
CY2013	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	9000000	USD
CY2014	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	0	USD
CY2015	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	32000000	USD
CY2014Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	15358000000	USD
CY2015Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	16650000000	USD
CY2014Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	10502000000	USD
CY2015Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	11537000000	USD
CY2013	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	21000000	USD
CY2014	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	22000000	USD
CY2015	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	19000000	USD
CY2014Q4	us-gaap	Public Utilities Inventory PublicUtilitiesInventory	379000000	USD
CY2015Q4	us-gaap	Public Utilities Inventory PublicUtilitiesInventory	347000000	USD
CY2014Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	3527000000	USD
CY2015Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	3129000000	USD
CY2014Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	1206000000	USD
CY2015Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	1276000000	USD
CY2013	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	1573000000	USD
CY2014	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	537000000	USD
CY2015	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	644000000	USD
CY2013	us-gaap	Revenues Revenues	8106000000	USD
CY2014Q1	us-gaap	Revenues Revenues	3163000000	USD
CY2014Q2	us-gaap	Revenues Revenues	1884000000	USD
CY2014Q3	us-gaap	Revenues Revenues	1807000000	USD
CY2014Q4	us-gaap	Revenues Revenues	2372000000	USD
CY2014	us-gaap	Revenues Revenues	9226000000	USD
CY2015Q4	us-gaap	Revenues Revenues	1791000000	USD
CY2015	us-gaap	Revenues Revenues	7386000000	USD
CY2015Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	14000000	shares
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	0	USD
CY2014Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	53000000	USD
CY2013	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	4000000	USD
CY2014	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	2000000	USD
CY2015Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	40000000	USD
CY2013Q4	us-gaap	Stockholders Equity StockholdersEquity	4329000000	USD
CY2014Q4	us-gaap	Stockholders Equity StockholdersEquity	4548000000	USD
CY2015Q4	us-gaap	Stockholders Equity StockholdersEquity	3461000000	USD
CY2013	us-gaap	Tax Adjustments Settlements And Unusual Provisions TaxAdjustmentsSettlementsAndUnusualProvisions	-8000000	USD
CY2013	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	387000000	USD
CY2014	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	388000000	USD
CY2015	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	374000000	USD
CY2014Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	161000000	USD
CY2015Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	158000000	USD
CY2013	us-gaap	Transfer Of Investments TransferOfInvestments	0	USD
CY2014	us-gaap	Transfer Of Investments TransferOfInvestments	196000000	USD
CY2015	us-gaap	Transfer Of Investments TransferOfInvestments	1000000	USD
CY2014Q4	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	357000000	USD
CY2015Q4	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	279000000	USD
CY2013Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	USD
CY2013	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	1000000	USD
CY2013	us-gaap	Unrecognized Tax Benefits Increases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsIncreasesResultingFromSettlementsWithTaxingAuthorities	24000000	USD
CY2013	us-gaap	Utilities Operating Expense Maintenance Operations And Other Costs And Expenses UtilitiesOperatingExpenseMaintenanceOperationsAndOtherCostsAndExpenses	1847000000	USD
CY2014	us-gaap	Utilities Operating Expense Maintenance Operations And Other Costs And Expenses UtilitiesOperatingExpenseMaintenanceOperationsAndOtherCostsAndExpenses	1969000000	USD
CY2015	us-gaap	Utilities Operating Expense Maintenance Operations And Other Costs And Expenses UtilitiesOperatingExpenseMaintenanceOperationsAndOtherCostsAndExpenses	2007000000	USD
CY2013	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	430930000	shares
CY2014	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	431668000	shares
CY2015	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	430180000	shares
CY2013	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	428466000	shares
CY2014	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	429634000	shares
CY2015	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	430180000	shares
CY2015	us-gaap	Use Of Estimates UseOfEstimates	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Use of Estimates</font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:justify;text-indent:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The preparation of financial statements in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.</font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></div>

Files In Submission

Name	View Source	Status
0001130310-16-000031-index-headers.html	Edgar Link	pending
0001130310-16-000031-index.html	Edgar Link	pending
0001130310-16-000031.txt	Edgar Link	pending
0001130310-16-000031-xbrl.zip	Edgar Link	pending
cnp-20151231.xml	Edgar Link	completed
cnp-20151231.xsd	Edgar Link	pending
cnp-20151231_cal.xml	Edgar Link	unprocessable
cnp-20151231_def.xml	Edgar Link	unprocessable
cnp-20151231_lab.xml	Edgar Link	unprocessable
cnp-20151231_pre.xml	Edgar Link	unprocessable
cnp_10kx12312015.htm	Edgar Link	pending
cnp_exhibit10ll2x12312015.htm	Edgar Link	pending
cnp_exhibit10ll3x12312015.htm	Edgar Link	pending
cnp_exhibit10ll5x12312015.htm	Edgar Link	pending
cnp_exhibit10ll7x12312015.htm	Edgar Link	pending
cnp_exhibit10mmx12312015.htm	Edgar Link	pending
cnp_exhibit10nnx12312015.htm	Edgar Link	pending
cnp_exhibit10sx12312015.htm	Edgar Link	pending
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cnp_exhibit3bx12312015.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
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report.css	Edgar Link	pending
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$CNP
CENTERPOINT ENERGY INC Stock $cnp

2015 Form 10-K Financial Statement

#000113031016000031 Filed on February 26, 2016

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CNP CENTERPOINT ENERGY INC Stock $cnp

2015 Form 10-K Financial Statement

#000113031016000031 Filed on February 26, 2016

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CNP
CENTERPOINT ENERGY INC Stock $cnp