$NRG
NRG Energy Inc Stock $nrg

$nrg Overview Financials Valuation SEC Filings Company Website

2015 Q4 Form 10-K Financial Statement

#000101387117000007 Filed on February 28, 2017

Income Statement

Concept	2015 Q4	2015 Q3	2015 Q2
Revenue	$3.011B	$4.434B	$3.400B
YoY Change	-28.17%	-2.95%	-6.1%
Cost Of Revenue	$2.225B	$3.042B	$2.436B
YoY Change	-24.6%	-7.2%	-13.86%
Gross Profit	$795.0M	$1.392B	$964.0M
YoY Change	-35.94%	7.82%	21.56%
Gross Profit Margin	26.4%	31.39%	28.35%
Selling, General & Admin	$334.0M	$327.0M	$296.0M
YoY Change	15.17%	26.74%	15.18%
% of Gross Profit	42.01%	23.49%	30.71%
Research & Development	$41.00M	$38.00M	$37.00M
YoY Change	41.38%	72.73%	76.19%
% of Gross Profit	5.16%	2.73%	3.84%
Depreciation & Amortization	$415.0M	$382.0M	$396.0M
YoY Change	-8.19%	1.87%	2.59%
% of Gross Profit	52.2%	27.44%	41.08%
Operating Expenses	$768.0M	$365.0M	$333.0M
YoY Change	2.95%	30.36%	19.78%
Operating Profit	-$4.727B	$379.0M	$232.0M
YoY Change	-1143.49%	-30.97%	160.67%
Interest Expense	-$280.0M	$291.0M	$263.0M
YoY Change	-4.44%	3.93%	-4.01%
% of Operating Profit		76.78%	113.36%
Other Income/Expense, Net	$6.000M	-$265.0M	-$258.0M
YoY Change	-33.33%	-4.68%	-12.54%
Pretax Income	-$4.973B	$114.0M	-$26.00M
YoY Change	-3060.12%	-57.93%	-87.38%
Income Tax	$1.385B	$47.00M	-$17.00M
% Of Pretax Income		41.23%
Net Earnings	-$6.314B	$66.00M	-$14.00M
YoY Change	-5405.88%	-60.71%	-85.57%
Net Earnings / Revenue	-209.7%	1.49%	-0.41%
Basic Earnings Per Share	-$20.08	$0.18	-$0.06
Diluted Earnings Per Share	-$20.08	$0.18	-$0.06
COMMON SHARES
Basic Shares Outstanding	315.0M shares	331.0M shares	333.0M shares
Diluted Shares Outstanding	315.0M shares	332.0M shares	333.0M shares

Balance Sheet

Concept	2015 Q4	2015 Q3	2015 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$1.518B	$2.265B	$2.146B
YoY Change	-28.26%	15.98%	44.9%
Cash & Equivalents	$853.0M	$2.265B	$2.146B
Short-Term Investments
Other Short-Term Assets	$3.451B	$3.141B	$3.279B
YoY Change	-3.82%	16.33%	2.98%
Inventory	$1.252B	$1.149B	$1.153B
Prepaid Expenses
Receivables	$1.157B	$1.492B	$1.413B
Other Receivables	$13.00M	$26.00M	$19.00M
Total Short-Term Assets	$7.391B	$8.073B	$8.010B
YoY Change	-12.1%	2.55%	3.26%
LONG-TERM ASSETS
Property, Plant & Equipment	$18.73B	$21.99B	$22.30B
YoY Change	-16.25%	-0.88%	3.37%
Goodwill	$999.0M	$2.503B	$2.555B
YoY Change	-61.19%	2.08%	20.75%
Intangibles
YoY Change
Long-Term Investments	$1.045B	$1.068B	$1.077B
YoY Change	35.54%	34.0%	24.51%
Other Assets	$1.214B	$1.426B	$1.405B
YoY Change	16.17%	11.32%	7.5%
Total Long-Term Assets	$6.759B	$9.930B	$10.05B
YoY Change	-30.25%	-0.86%	-66.35%
TOTAL ASSETS
Total Short-Term Assets	$7.391B	$8.073B	$8.010B
Total Long-Term Assets	$6.759B	$9.930B	$10.05B
Total Assets	$32.88B	$39.99B	$40.37B
YoY Change	-18.74%	-0.2%	7.27%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$869.0M	$1.173B	$1.080B
YoY Change	-18.02%	6.83%	-2.09%
Accrued Expenses	$810.0M	$1.222B	$1.082B
YoY Change	0.62%	1.83%	1.6%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$481.0M	$457.0M	$636.0M
YoY Change	1.48%	-46.49%	-23.65%
Total Short-Term Liabilities	$4.375B	$4.336B	$4.469B
YoY Change	-9.96%	-4.56%	-5.84%
LONG-TERM LIABILITIES
Long-Term Debt	$18.98B	$19.60B	$19.66B
YoY Change	-3.64%	-1.61%	8.24%
Other Long-Term Liabilities	$900.0M	$1.478B	$1.527B
YoY Change	6.26%	6.71%	21.77%
Total Long-Term Liabilities	$22.74B	$23.49B	$23.55B
YoY Change	-3.72%	-0.31%	8.74%
TOTAL LIABILITIES
Total Short-Term Liabilities	$4.375B	$4.336B	$4.469B
Total Long-Term Liabilities	$22.74B	$23.49B	$23.55B
Total Liabilities	$27.12B	$27.82B	$28.02B
YoY Change	-4.79%	-1.0%	6.12%
SHAREHOLDERS EQUITY
Retained Earnings	-$3.007B	$3.358B	$3.346B
YoY Change	-183.81%	-5.78%	-2.87%
Common Stock	$8.300B	$8.386B	$8.369B
YoY Change	-0.37%	0.82%	0.75%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$2.413B	$2.330B	$2.166B
YoY Change	21.68%	20.17%	11.65%
Treasury Stock Shares	102.7M shares	97.19M shares	86.25M shares
Shareholders Equity	$3.009B	$9.525B	$9.675B
YoY Change
Total Liabilities & Shareholders Equity	$32.88B	$39.99B	$40.37B
YoY Change	-18.74%	-0.2%	7.27%

Cashflow Statement

Concept	2015 Q4	2015 Q3	2015 Q2
OPERATING ACTIVITIES
Net Income	-$6.314B	$66.00M	-$14.00M
YoY Change	-5405.88%	-60.71%	-85.57%
Depreciation, Depletion And Amortization	$415.0M	$382.0M	$396.0M
YoY Change	-8.19%	1.87%	2.59%
Cash From Operating Activities	-$83.00M	$934.0M	$198.0M
YoY Change	-120.96%	25.54%	-1042.86%
INVESTING ACTIVITIES
Capital Expenditures	-$394.0M	-$306.0M	-$331.0M
YoY Change	68.38%	82.14%	22.59%
Acquisitions
YoY Change
Other Investing Activities	$141.0M	-$66.00M	-$259.0M
YoY Change	-51.21%	-93.64%	-83.88%
Cash From Investing Activities	-$253.0M	-$372.0M	-$590.0M
YoY Change	-560.0%	-69.13%	-68.57%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-406.0M	-455.0M	389.0M
YoY Change	47.1%	-150.17%	78.44%
NET CHANGE
Cash From Operating Activities	-83.00M	934.0M	198.0M
Cash From Investing Activities	-253.0M	-372.0M	-590.0M
Cash From Financing Activities	-406.0M	-455.0M	389.0M
Net Change In Cash	-742.0M	107.0M	-3.000M
YoY Change	-524.0%	-76.01%	-99.82%
FREE CASH FLOW
Cash From Operating Activities	-$83.00M	$934.0M	$198.0M
Capital Expenditures	-$394.0M	-$306.0M	-$331.0M
Free Cash Flow	$311.0M	$1.240B	$529.0M
YoY Change	-50.63%	35.96%	112.45%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2016	dei	Document Type DocumentType	10-K
CY2016	dei	Entity Central Index Key EntityCentralIndexKey	0001013871
CY2017Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	315972715	shares
CY2016	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2016	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2016	dei	Amendment Flag AmendmentFlag	false
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
CY2016Q2	dei	Entity Public Float EntityPublicFloat	4180823320	USD
CY2016	dei	Entity Registrant Name EntityRegistrantName	NRG ENERGY, INC.
CY2016	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2016	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2014	nrg	Accrued Expenses And Other Current Liabilities Operating AccruedExpensesAndOtherCurrentLiabilitiesOperating	-26000000	USD
CY2015	nrg	Accrued Expenses And Other Current Liabilities Operating AccruedExpensesAndOtherCurrentLiabilitiesOperating	-9000000	USD
CY2016	nrg	Accrued Expenses And Other Current Liabilities Operating AccruedExpensesAndOtherCurrentLiabilitiesOperating	-39000000	USD
CY2015Q4	nrg	Accumulated Amortizationof Outof Market Contracts AccumulatedAmortizationofOutofMarketContracts	664000000	USD
CY2016Q4	nrg	Accumulated Amortizationof Outof Market Contracts AccumulatedAmortizationofOutofMarketContracts	765000000	USD
CY2014Q4	nrg	Accumulated Other Comprehensive Income Loss Cumulative Change In Gain Loss From Cash Flow Hedges Tax Amount AccumulatedOtherComprehensiveIncomeLossCumulativeChangeInGainLossFromCashFlowHedgesTaxAmount	35000000	USD
CY2015Q4	nrg	Accumulated Other Comprehensive Income Loss Cumulative Change In Gain Loss From Cash Flow Hedges Tax Amount AccumulatedOtherComprehensiveIncomeLossCumulativeChangeInGainLossFromCashFlowHedgesTaxAmount	16000000	USD
CY2016Q4	nrg	Accumulated Other Comprehensive Income Loss Cumulative Change In Gain Loss From Cash Flow Hedges Tax Amount AccumulatedOtherComprehensiveIncomeLossCumulativeChangeInGainLossFromCashFlowHedgesTaxAmount	16000000	USD
CY2016Q4	nrg	Additional Mutual Lost Revenue Insurance Weekly Maximum AdditionalMutualLostRevenueInsuranceWeeklyMaximum	1980000	USD
CY2014	nrg	Amortization Of Intangibles And Out Of Market Contracts AmortizationOfIntangiblesAndOutOfMarketContracts	64000000	USD
CY2015	nrg	Amortization Of Intangibles And Out Of Market Contracts AmortizationOfIntangiblesAndOutOfMarketContracts	81000000	USD
CY2016	nrg	Amortization Of Intangibles And Out Of Market Contracts AmortizationOfIntangiblesAndOutOfMarketContracts	91000000	USD
CY2014	nrg	Amortization Of Nuclear Fuel AmortizationOfNuclearFuel	46000000	USD
CY2015	nrg	Amortization Of Nuclear Fuel AmortizationOfNuclearFuel	45000000	USD
CY2016	nrg	Amortization Of Nuclear Fuel AmortizationOfNuclearFuel	49000000	USD
CY2016Q4	nrg	Amount Of Credit Exposure To Significant Portion Of All Counterparties AmountOfCreditExposureToSignificantPortionOfAllCounterparties	231000000	USD
CY2016Q4	nrg	Amount Of Net Counterparty Credit Risk Exposure To Certain Counterparties AmountOfNetCounterpartyCreditRiskExposureToCertainCounterparties	80000000	USD
CY2014	nrg	Changes In Nuclear Decommissioning Trust Liability ChangesInNuclearDecommissioningTrustLiability	19000000	USD
CY2016	nrg	Asset Retirement Obligation Accretion Nuclear Decommissioning AssetRetirementObligationAccretionNuclearDecommissioning	15000000	USD
CY2015Q4	nrg	Capital Expenditures CapitalExpenditures	1267000000	USD
CY2016Q4	nrg	Capital Expenditures CapitalExpenditures	1242000000	USD
CY2016Q4	nrg	Cash Flow Hedge Gain Loss To Be Reclassified Within Twelve Months Tax CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonthsTax	4000000	USD
CY2014	nrg	Changes In Collateral Deposits Supporting Energy Risk Management Activities ChangesInCollateralDepositsSupportingEnergyRiskManagementActivities	146000000	USD
CY2015	nrg	Changes In Collateral Deposits Supporting Energy Risk Management Activities ChangesInCollateralDepositsSupportingEnergyRiskManagementActivities	-381000000	USD
CY2016	nrg	Changes In Collateral Deposits Supporting Energy Risk Management Activities ChangesInCollateralDepositsSupportingEnergyRiskManagementActivities	365000000	USD
CY2014	nrg	Changes In Derivatives ChangesInDerivatives	-61000000	USD
CY2015	nrg	Changes In Derivatives ChangesInDerivatives	233000000	USD
CY2016	nrg	Changes In Derivatives ChangesInDerivatives	23000000	USD
CY2015	nrg	Changes In Nuclear Decommissioning Trust Liability ChangesInNuclearDecommissioningTrustLiability	-2000000	USD
CY2016	nrg	Changes In Nuclear Decommissioning Trust Liability ChangesInNuclearDecommissioningTrustLiability	41000000	USD
CY2016Q4	nrg	Collateral Held Cash And Letters Of Credit CollateralHeldCashAndLettersOfCredit	2000000	USD
	nrg	Commissionsper Share CommissionsperShare	0.015
CY2016Q4	nrg	Common Stock Capital Shares Reserved For Employee Stock Purchase Plan CommonStockCapitalSharesReservedForEmployeeStockPurchasePlan	667819	shares
CY2015Q4	nrg	Common Stock Dividends Proposed Annual Percentage Increase CommonStockDividendsProposedAnnualPercentageIncrease	0.04	pure
CY2016Q4	nrg	Common Stock Dividends Proposed Annual Percentage Increase CommonStockDividendsProposedAnnualPercentageIncrease	0.79	pure
CY2014	nrg	Comprehensive Income Loss Net Of Tax Available For Common Stockholders ComprehensiveIncomeLossNetOfTaxAvailableForCommonStockholders	-121000000	USD
CY2015	nrg	Comprehensive Income Loss Net Of Tax Available For Common Stockholders ComprehensiveIncomeLossNetOfTaxAvailableForCommonStockholders	-6382000000	USD
CY2016	nrg	Comprehensive Income Loss Net Of Tax Available For Common Stockholders ComprehensiveIncomeLossNetOfTaxAvailableForCommonStockholders	-663000000	USD
CY2014	nrg	Consent Fees Paid Preferred Stock ConsentFeesPaidPreferredStock	5000000	USD
CY2014	nrg	Consent Fees Paid Preferred Stock ConsentFeesPaidPreferredStock	5000000	USD
CY2015	nrg	Consent Fees Paid Preferred Stock ConsentFeesPaidPreferredStock	0	USD
CY2016	nrg	Consent Fees Paid Preferred Stock ConsentFeesPaidPreferredStock	0	USD
CY2014	nrg	Cost Of Services Energy Services Unbilled CostOfServicesEnergyServicesUnbilled	86000000	USD
CY2015	nrg	Cost Of Services Energy Services Unbilled CostOfServicesEnergyServicesUnbilled	85000000	USD
CY2016	nrg	Cost Of Services Energy Services Unbilled CostOfServicesEnergyServicesUnbilled	90000000	USD
CY2014	nrg	Costofrevenueincludingsellingmarketingandgeneraladministrative Costofrevenueincludingsellingmarketingandgeneraladministrative	12824000000	USD
CY2015	nrg	Costofrevenueincludingsellingmarketingandgeneraladministrative Costofrevenueincludingsellingmarketingandgeneraladministrative	11983000000	USD
CY2016	nrg	Costofrevenueincludingsellingmarketingandgeneraladministrative Costofrevenueincludingsellingmarketingandgeneraladministrative	9656000000	USD
CY2016	nrg	Counterparty Credit Risk Exposure Percentage Of Credit Risk Roll Off CounterpartyCreditRiskExposurePercentageOfCreditRiskRollOff	0.95	pure
CY2016	nrg	Counterparty Credit Risk Exposure Percentage Threshold CounterpartyCreditRiskExposurePercentageThreshold	0.10	pure
CY2016Q4	nrg	Credit Derivative Maximum Net Exposure Percentage CreditDerivativeMaximumNetExposurePercentage	1.00	pure
CY2014	nrg	Decrease In Fixed Assets Accrued Grants DecreaseInFixedAssetsAccruedGrants	-711000000	USD
CY2015	nrg	Decrease In Fixed Assets Accrued Grants DecreaseInFixedAssetsAccruedGrants	0	USD
CY2016	nrg	Decrease In Fixed Assets Accrued Grants DecreaseInFixedAssetsAccruedGrants	0	USD
CY2015Q4	nrg	Deferred Tax Assets Differences Between Book And Tax Basis Of Contracts DeferredTaxAssetsDifferencesBetweenBookAndTaxBasisOfContracts	516000000	USD
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CY2015Q4	nrg	Deferred Tax Assets Federal Benefit On State Unrecognized Tax Benefits DeferredTaxAssetsFederalBenefitOnStateUnrecognizedTaxBenefits	17000000	USD
CY2016Q4	nrg	Deferred Tax Assets Federal Benefit On State Unrecognized Tax Benefits DeferredTaxAssetsFederalBenefitOnStateUnrecognizedTaxBenefits	12000000	USD
CY2015Q4	nrg	Deferred Tax Assets Foreign Capital Loss Carryforwards DeferredTaxAssetsForeignCapitalLossCarryforwards	1000000	USD
CY2016Q4	nrg	Deferred Tax Assets Foreign Capital Loss Carryforwards DeferredTaxAssetsForeignCapitalLossCarryforwards	1000000	USD
CY2015Q4	nrg	Deferred Tax Assets Intangibles DeferredTaxAssetsIntangibles	90000000	USD
CY2016Q4	nrg	Deferred Tax Assets Intangibles DeferredTaxAssetsIntangibles	211000000	USD
CY2016Q4	nrg	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Deferred Compensation Accrued Vacation And Other Reserves DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsDeferredCompensationAccruedVacationAndOtherReserves	318000000	USD
CY2015Q4	nrg	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions And Other Postretirement Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensionsAndOtherPostretirementBenefits	218000000	USD
CY2016Q4	nrg	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions And Other Postretirement Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensionsAndOtherPostretirementBenefits	183000000	USD
CY2015Q4	nrg	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Deferred Compensation Accrued Vacation And Other Reserves DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsDeferredCompensationAccruedVacationAndOtherReserves	255000000	USD
CY2015Q4	nrg	Deferred Tax Assets Tax Deferred Expenses Deferred Financing Costs DeferredTaxAssetsTaxDeferredExpensesDeferredFinancingCosts	6000000	USD
CY2016Q4	nrg	Deferred Tax Assets Tax Deferred Expenses Deferred Financing Costs DeferredTaxAssetsTaxDeferredExpensesDeferredFinancingCosts	4000000	USD
CY2015Q4	nrg	Deferred Tax Liabilities Emissions Allowances DeferredTaxLiabilitiesEmissionsAllowances	31000000	USD
CY2016Q4	nrg	Deferred Tax Liabilities Emissions Allowances DeferredTaxLiabilitiesEmissionsAllowances	30000000	USD
CY2016Q4	nrg	Deficit Restoration Obligation DeficitRestorationObligation	88000000	USD
CY2015Q4	nrg	Derivative Asset Fair Value Amount Offset Against Collateral Net Of Derivative Liability Fair Value Amount Offset Against Collateral DerivativeAssetFairValueAmountOffsetAgainstCollateralNetOfDerivativeLiabilityFairValueAmountOffsetAgainstCollateral	164000000	USD
CY2016Q4	nrg	Derivative Asset Fair Value Amount Offset Against Collateral Net Of Derivative Liability Fair Value Amount Offset Against Collateral DerivativeAssetFairValueAmountOffsetAgainstCollateralNetOfDerivativeLiabilityFairValueAmountOffsetAgainstCollateral	-114000000	USD
CY2016Q4	nrg	Derivative Asset Fair Value Determined Using Valuation Techniques Percentage DerivativeAssetFairValueDeterminedUsingValuationTechniquesPercentage	0.07	pure
CY2015Q4	nrg	Derivative Asset Fair Value Gross Liability Net Of Derivative Liability Fair Value Gross Asset DerivativeAssetFairValueGrossLiabilityNetOfDerivativeLiabilityFairValueGrossAsset	0	USD
CY2016Q4	nrg	Derivative Asset Fair Value Gross Liability Net Of Derivative Liability Fair Value Gross Asset DerivativeAssetFairValueGrossLiabilityNetOfDerivativeLiabilityFairValueGrossAsset	0	USD
CY2015Q4	nrg	Derivative Collateral Obligation To Return Cash Net Of Derivative Collateral Right To Reclaim Cash DerivativeCollateralObligationToReturnCashNetOfDerivativeCollateralRightToReclaimCash	158000000	USD
CY2016Q4	nrg	Derivative Collateral Obligation To Return Cash Net Of Derivative Collateral Right To Reclaim Cash DerivativeCollateralObligationToReturnCashNetOfDerivativeCollateralRightToReclaimCash	13000000	USD
CY2016Q4	nrg	Derivative Liability Fair Value Determined Using Valuation Techniques Percentage DerivativeLiabilityFairValueDeterminedUsingValuationTechniquesPercentage	0.12	pure
CY2016Q4	nrg	Derivative Net Liability Position Collateral Required Adequate Assurance Clauses DerivativeNetLiabilityPositionCollateralRequiredAdequateAssuranceClauses	36000000	USD
CY2016Q4	nrg	Derivative Net Liability Position Collateral Required Contracts With Credit Rating Contingent Feature DerivativeNetLiabilityPositionCollateralRequiredContractsWithCreditRatingContingentFeature	56000000	USD
CY2016Q4	nrg	Derivative Net Liability Position No Counterparty Collateral Call DerivativeNetLiabilityPositionNoCounterpartyCollateralCall	14000000	USD
CY2014	nrg	Derivative Unrealized Gains On Open Positions Related To Trading Activity Net DerivativeUnrealizedGainsOnOpenPositionsRelatedToTradingActivityNet	45000000	USD
CY2015	nrg	Derivative Unrealized Gains On Open Positions Related To Trading Activity Net DerivativeUnrealizedGainsOnOpenPositionsRelatedToTradingActivityNet	-16000000	USD
CY2016	nrg	Derivative Unrealized Gains On Open Positions Related To Trading Activity Net DerivativeUnrealizedGainsOnOpenPositionsRelatedToTradingActivityNet	18000000	USD
CY2014	nrg	Effective Income Tax Rate Reconciliation Reversal Of Uncertain Tax Positions Reserves EffectiveIncomeTaxRateReconciliationReversalOfUncertainTaxPositionsReserves	30000000	USD
CY2015	nrg	Effective Income Tax Rate Reconciliation Reversal Of Uncertain Tax Positions Reserves EffectiveIncomeTaxRateReconciliationReversalOfUncertainTaxPositionsReserves	15000000	USD
CY2016	nrg	Effective Income Tax Rate Reconciliation Reversal Of Uncertain Tax Positions Reserves EffectiveIncomeTaxRateReconciliationReversalOfUncertainTaxPositionsReserves	-2000000	USD
CY2014	nrg	Effective Income Tax Rate Reconciliation Tax Expense Attributableto Partnerships EffectiveIncomeTaxRateReconciliationTaxExpenseAttributabletoPartnerships	4000000	USD
CY2015	nrg	Effective Income Tax Rate Reconciliation Tax Expense Attributableto Partnerships EffectiveIncomeTaxRateReconciliationTaxExpenseAttributabletoPartnerships	12000000	USD
CY2016	nrg	Effective Income Tax Rate Reconciliation Tax Expense Attributableto Partnerships EffectiveIncomeTaxRateReconciliationTaxExpenseAttributabletoPartnerships	-1000000	USD
CY2016	nrg	Employee Stock Purchase Plan Exercise Price As Percentage Of Fair Value EmployeeStockPurchasePlanExercisePriceAsPercentageOfFairValue	0.85	pure
CY2016	nrg	Employee Stock Purchase Plan Maximum Percentage Of Compensation Eligible EmployeeStockPurchasePlanMaximumPercentageOfCompensationEligible	0.10	pure
CY2016Q3	nrg	Environmental Projects EnvironmentalProjects	1000000	USD
CY2014	nrg	Equity In Earnings Of Consolidated Subsidiaries EquityInEarningsOfConsolidatedSubsidiaries	0	USD
CY2015	nrg	Equity In Earnings Of Consolidated Subsidiaries EquityInEarningsOfConsolidatedSubsidiaries	0	USD
CY2016	nrg	Equity In Earnings Of Consolidated Subsidiaries EquityInEarningsOfConsolidatedSubsidiaries	0	USD
CY2016	nrg	Estimated Counterparty Credit Risk Exposure To Certain Counterparties EstimatedCounterpartyCreditRiskExposureToCertainCounterparties	4100000000	USD
CY2016	nrg	Estimated Counterparty Credit Risk Exposure To Certain Counterparties Period EstimatedCounterpartyCreditRiskExposureToCertainCounterpartiesPeriod	P5Y
CY2015	nrg	Fair Value Assets And Liabilities Level1 To Level2 Transfers Amount FairValueAssetsAndLiabilitiesLevel1ToLevel2TransfersAmount	0	USD
CY2016	nrg	Fair Value Assets And Liabilities Level1 To Level2 Transfers Amount FairValueAssetsAndLiabilitiesLevel1ToLevel2TransfersAmount	0	USD
CY2015	nrg	Fair Value Assets And Liabilities Level2 To Level1 Transfers Amount FairValueAssetsAndLiabilitiesLevel2ToLevel1TransfersAmount	0	USD
CY2016	nrg	Fair Value Assets And Liabilities Level2 To Level1 Transfers Amount FairValueAssetsAndLiabilitiesLevel2ToLevel1TransfersAmount	0	USD
CY2016Q4	nrg	Fair Value Assets Measured On Recurring Basis Valuation Techniques Impact Of Credit Reserve To Fair Value Included In Oci Derivative Contracts FairValueAssetsMeasuredOnRecurringBasisValuationTechniquesImpactOfCreditReserveToFairValueIncludedInOciDerivativeContracts	2000000	USD
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CY2015Q4	nrg	Fair Valueof Gross Derivative Assets Liabilities Net FairValueofGrossDerivativeAssetsLiabilitiesNet	6000000	USD
CY2016Q4	nrg	Fair Valueof Gross Derivative Assets Liabilities Net FairValueofGrossDerivativeAssetsLiabilitiesNet	-127000000	USD
CY2015Q2	nrg	Fees Incurredfor Terminationof Interest Rate Swaps FeesIncurredforTerminationofInterestRateSwaps	17000000	USD
CY2015	nrg	Finite Lived Intangible Assets Other Changes FiniteLivedIntangibleAssetsOtherChanges	11000000	USD
CY2016	nrg	Finite Lived Intangible Assets Other Changes FiniteLivedIntangibleAssetsOtherChanges	-7000000	USD
CY2015	nrg	Finite Lived Intangible Assets Purchases FiniteLivedIntangibleAssetsPurchases	137000000	USD
CY2016	nrg	Finite Lived Intangible Assets Usage FiniteLivedIntangibleAssetsUsage	-45000000	USD
CY2016	nrg	Finite Lived Intangible Assets Purchases FiniteLivedIntangibleAssetsPurchases	84000000	USD
CY2015	nrg	Finite Lived Intangible Assets Usage FiniteLivedIntangibleAssetsUsage	95000000	USD
CY2015	nrg	Finite Lived Intangible Assets Write Off Of Fully Amortized Intangible Assets FiniteLivedIntangibleAssetsWriteOffOfFullyAmortizedIntangibleAssets	154000000	USD
CY2016	nrg	Finite Lived Intangible Assets Write Off Of Fully Amortized Intangible Assets FiniteLivedIntangibleAssetsWriteOffOfFullyAmortizedIntangibleAssets	-10000000	USD
CY2016Q4	nrg	Forty Four Percent Maximum Assessment FortyFourPercentMaximumAssessment	0.44	pure
CY2015Q4	nrg	Funds Deposited By Counterparties FundsDepositedByCounterparties	106000000	USD
CY2016Q4	nrg	Funds Deposited By Counterparties FundsDepositedByCounterparties	2000000	USD
CY2014	nrg	Gainon Redemptionof Redeemable Preferred Stock GainonRedemptionofRedeemablePreferredStock	0	USD
CY2015	nrg	Gainon Redemptionof Redeemable Preferred Stock GainonRedemptionofRedeemablePreferredStock	0	USD
CY2016Q2	nrg	Gainon Redemptionof Redeemable Preferred Stock GainonRedemptionofRedeemablePreferredStock	-78000000	USD
CY2016	nrg	Gainon Redemptionof Redeemable Preferred Stock GainonRedemptionofRedeemablePreferredStock	78000000	USD
CY2014	nrg	Gains Losses On Extinguishment Of Debt Non Cash Portion GainsLossesOnExtinguishmentOfDebtNonCashPortion	-25000000	USD
CY2015	nrg	Gains Losses On Extinguishment Of Debt Non Cash Portion GainsLossesOnExtinguishmentOfDebtNonCashPortion	75000000	USD
CY2016	nrg	Gains Losses On Extinguishment Of Debt Non Cash Portion GainsLossesOnExtinguishmentOfDebtNonCashPortion	-21000000	USD
CY2014	nrg	Gross Receipts Tax GrossReceiptsTax	108000000	USD
CY2015	nrg	Gross Receipts Tax GrossReceiptsTax	110000000	USD
CY2016	nrg	Gross Receipts Tax GrossReceiptsTax	102000000	USD
CY2016Q4	nrg	Guarantee Maturity Between One To Three Years GuaranteeMaturityBetweenOneToThreeYears	500000000	USD
CY2016Q4	nrg	Guarantee Maturity Between Three To Five Years GuaranteeMaturityBetweenThreeToFiveYears	5000000	USD
CY2016Q4	nrg	Guarantee Maturity Greater Than Five Years GuaranteeMaturityGreaterThanFiveYears	1003000000	USD
CY2016Q4	nrg	Guarantee Maturity Less Than One Year GuaranteeMaturityLessThanOneYear	2122000000	USD
CY2015Q4	nrg	Guarantee Obligations Estimated Exposure GuaranteeObligationsEstimatedExposure	2878000000	USD
CY2016Q4	nrg	Guarantee Obligations Estimated Exposure GuaranteeObligationsEstimatedExposure	3630000000	USD
CY2014	nrg	Impairment Charges And Asset Write Downs ImpairmentChargesAndAssetWriteDowns	-97000000	USD
CY2015	nrg	Impairment Charges And Asset Write Downs ImpairmentChargesAndAssetWriteDowns	-5086000000	USD
CY2016	nrg	Impairment Charges And Asset Write Downs ImpairmentChargesAndAssetWriteDowns	-1186000000	USD
CY2014	nrg	Income Tax Reconciliation Impact Of Non Taxible Equity Earning IncomeTaxReconciliationImpactOfNonTaxibleEquityEarning	-11000000	USD
CY2015	nrg	Income Tax Reconciliation Impact Of Non Taxible Equity Earning IncomeTaxReconciliationImpactOfNonTaxibleEquityEarning	-10000000	USD
CY2016	nrg	Income Tax Reconciliation Impact Of Non Taxible Equity Earning IncomeTaxReconciliationImpactOfNonTaxibleEquityEarning	22000000	USD
CY2016	nrg	Income Taxes Threshold Percentage IncomeTaxesThresholdPercentage	0.50	pure
CY2014	nrg	Increase Decrease In Restricted Cash To Support Equity Requirements For Us Doe Funded Projects IncreaseDecreaseInRestrictedCashToSupportEquityRequirementsForUSDoeFundedProjects	206000000	USD
CY2015	nrg	Increase Decrease In Restricted Cash To Support Equity Requirements For Us Doe Funded Projects IncreaseDecreaseInRestrictedCashToSupportEquityRequirementsForUSDoeFundedProjects	-35000000	USD
CY2016	nrg	Increase Decrease In Restricted Cash To Support Equity Requirements For Us Doe Funded Projects IncreaseDecreaseInRestrictedCashToSupportEquityRequirementsForUSDoeFundedProjects	3000000	USD
CY2016Q4	nrg	Industry Mutual Insurance Company Multiplier IndustryMutualInsuranceCompanyMultiplier	10	pure
CY2014	nrg	Inter Segment Sales InterSegmentSales	2002000000	USD
CY2015	nrg	Inter Segment Sales InterSegmentSales	1171000000	USD
CY2016	nrg	Inter Segment Sales InterSegmentSales	1117000000	USD
CY2015	nrg	Intercompany Dividend Proceeds Financing IntercompanyDividendProceedsFinancing	0	USD
CY2016	nrg	Intercompany Dividend Proceeds Financing IntercompanyDividendProceedsFinancing	0	USD
CY2015	nrg	Intercompany Dividend Proceeds Investing IntercompanyDividendProceedsInvesting	0	USD
CY2016	nrg	Intercompany Dividend Proceeds Investing IntercompanyDividendProceedsInvesting	0	USD
CY2014	nrg	Investments In Proceeds From Sales Of Unconsolidated Affiliates InvestmentsInProceedsFromSalesOfUnconsolidatedAffiliates	-103000000	USD
CY2015	nrg	Investments In Proceeds From Sales Of Unconsolidated Affiliates InvestmentsInProceedsFromSalesOfUnconsolidatedAffiliates	-395000000	USD
CY2016	nrg	Investments In Proceeds From Sales Of Unconsolidated Affiliates InvestmentsInProceedsFromSalesOfUnconsolidatedAffiliates	-34000000	USD
CY2016Q4	nrg	Longterm Debtexcluding Unamortized Discount Premiumnet LongtermDebtexcludingUnamortizedDiscountPremiumnet	19333000000	USD
CY2014	nrg	Losson Extinguishmentof Preferred Stock LossonExtinguishmentofPreferredStock	42000000	USD
CY2016	nrg	Maximum Remaining Termunder Individual Purchased Power Contract MaximumRemainingTermunderIndividualPurchasedPowerContract	P5Y
CY2016Q4	nrg	Mutual Lost Revenue Insurance Maximum Weekly Recovery MutualLostRevenueInsuranceMaximumWeeklyRecovery	2520000	USD
CY2016Q4	nrg	Mutual Property Insurance Additional Blanket Policy Property Coverage MutualPropertyInsuranceAdditionalBlanketPolicyPropertyCoverage	1250000000	USD
CY2016Q4	nrg	Mutual Property Insurance Individual Maximum Property Coverage Limit MutualPropertyInsuranceIndividualMaximumPropertyCoverageLimit	1500000000	USD
CY2016Q4	nrg	Net Credit Exposure NetCreditExposure	229000000	USD
CY2015Q4	nrg	Net Deferred Tax Assetbeforevaluationallowance NetDeferredTaxAssetbeforevaluationallowance	3700000000	USD
CY2016Q4	nrg	Net Deferred Tax Assetbeforevaluationallowance NetDeferredTaxAssetbeforevaluationallowance	4300000000	USD
CY2014	nrg	Noncashadjustmentforissuanceofconvertibledebt Noncashadjustmentforissuanceofconvertibledebt	23000000	USD
CY2015	nrg	Noncashadjustmentforissuanceofconvertibledebt Noncashadjustmentforissuanceofconvertibledebt	23000000	USD
CY2015	nrg	Noncontrolling Interest Contributionsfrom Noncontrolling Interest Holders NoncontrollingInterestContributionsfromNoncontrollingInterestHolders	234000000	USD
CY2016	nrg	Noncontrolling Interest Contributionsfrom Noncontrolling Interest Holders NoncontrollingInterestContributionsfromNoncontrollingInterestHolders	30000000	USD
CY2015Q4	nrg	Nuclear Decommissioning Trust Fund Liability Noncurrent NuclearDecommissioningTrustFundLiabilityNoncurrent	283000000	USD
CY2016Q4	nrg	Nuclear Decommissioning Trust Fund Liability Noncurrent NuclearDecommissioningTrustFundLiabilityNoncurrent	339000000	USD
CY2016Q4	nrg	Nuclear Insurance Financial Protection Pool Maximum Annual Assessment NuclearInsuranceFinancialProtectionPoolMaximumAnnualAssessment	19000000	USD
CY2016Q4	nrg	Nuclear Insurance Financial Protection Pool Maximum Assessment NuclearInsuranceFinancialProtectionPoolMaximumAssessment	127000000	USD
CY2016Q4	nrg	Nuclear Insurance Financial Protection Pool Maximum Assessment Adminstrative Fee Asa Percent NuclearInsuranceFinancialProtectionPoolMaximumAssessmentAdminstrativeFeeAsaPercent	0.05	pure
CY2016Q4	nrg	Nuclear Insurance Financial Protection Pool Nuclear Operator Maximum Annual Assessment NuclearInsuranceFinancialProtectionPoolNuclearOperatorMaximumAnnualAssessment	8000000	USD
CY2016Q4	nrg	Nuclear Insurance Financial Protection Pool Nuclear Operator Total Assessment NuclearInsuranceFinancialProtectionPoolNuclearOperatorTotalAssessment	112000000	USD
CY2016Q4	nrg	Nuclear Insurance Financial Protection Pool Value NuclearInsuranceFinancialProtectionPoolValue	13000000000	USD
CY2016Q4	nrg	Nuclear Insurance Per Incident Coverage Limit NuclearInsurancePerIncidentCoverageLimit	13440000000	USD
CY2016Q4	nrg	Nuclear Insurance Requirement Per Site NuclearInsuranceRequirementPerSite	450000000	USD
CY2012Q3	nrg	Number Of Pjm Transmission Owners Who Filed Motion NumberOfPjmTransmissionOwnersWhoFiledMotion	3
CY2010Q2	nrg	Number Of Significant Orders Issued By Authority NumberOfSignificantOrdersIssuedByAuthority	2	orders
CY2016	nrg	Number Of Years Board Of Directors Of Industry Mutual Insurance Company Can Adjust Policy After Policy Expires NumberOfYearsBoardOfDirectorsOfIndustryMutualInsuranceCompanyCanAdjustPolicyAfterPolicyExpires	P6Y
CY2016Q4	nrg	Other Assets Noncurrent Emission Allowances OtherAssetsNoncurrentEmissionAllowances	39000000	USD
CY2015	nrg	Other Comprehensive Income Loss Including Oc Ifor Nci OtherComprehensiveIncomeLossIncludingOCIforNCI	-3000000	USD
CY2016	nrg	Other Comprehensive Income Loss Including Oc Ifor Nci OtherComprehensiveIncomeLossIncludingOCIforNCI	38000000	USD
CY2016	nrg	Outof Market Subsidy Paymentterm OutofMarketSubsidyPaymentterm	P12Y
CY2016Q4	nrg	Outofmarketsubsidypayments Outofmarketsubsidypayments	7600000000	USD
CY2014	nrg	Payments To Settle Acquired Derivatives That Include Financing Elements PaymentsToSettleAcquiredDerivativesThatIncludeFinancingElements	-9000000	USD
CY2015	nrg	Payments To Settle Acquired Derivatives That Include Financing Elements PaymentsToSettleAcquiredDerivativesThatIncludeFinancingElements	-196000000	USD
CY2016	nrg	Payments To Settle Acquired Derivatives That Include Financing Elements PaymentsToSettleAcquiredDerivativesThatIncludeFinancingElements	-151000000	USD
CY2016	nrg	Period Beyondwhich Comapny Can Not Predict Holdingof Collateral PeriodBeyondwhichComapnyCanNotPredictHoldingofCollateral	P12M
CY2016	nrg	Periodofretrospectivepremiumadjustments Periodofretrospectivepremiumadjustments	P24M
CY2015Q4	nrg	Preferred Stock Instrument Interest Rate Stated Percentage PreferredStockInstrumentInterestRateStatedPercentage	2.822	pure
CY2016Q4	nrg	Preferred Stock Instrument Interest Rate Stated Percentage PreferredStockInstrumentInterestRateStatedPercentage	2.822	pure
CY2014Q4	nrg	Preferred Stock Instrument Interest Rate Stated Percentage PreferredStockInstrumentInterestRateStatedPercentage	3.625	pure
CY2015Q4	nrg	Prepaid Expense And Other Assets Current Less Accounts Receivable Affiliate PrepaidExpenseAndOtherAssetsCurrentLessAccountsReceivableAffiliate	451000000	USD
CY2016Q4	nrg	Prepaid Expense And Other Assets Current Less Accounts Receivable Affiliate PrepaidExpenseAndOtherAssetsCurrentLessAccountsReceivableAffiliate	417000000	USD
CY2014	nrg	Proceeds From Payments To Intercompany Loans ProceedsFromPaymentsToIntercompanyLoans	0	USD
CY2015	nrg	Proceeds From Payments To Intercompany Loans ProceedsFromPaymentsToIntercompanyLoans	0	USD
CY2016	nrg	Proceeds From Payments To Intercompany Loans ProceedsFromPaymentsToIntercompanyLoans	0	USD
CY2014	nrg	Proceeds From Renewable Energy Grants ProceedsFromRenewableEnergyGrants	916000000	USD
CY2015	nrg	Proceeds From Renewable Energy Grants ProceedsFromRenewableEnergyGrants	82000000	USD
CY2016	nrg	Proceeds From Renewable Energy Grants ProceedsFromRenewableEnergyGrants	36000000	USD
CY2014	nrg	Proceedsfromsaleofnoncontrollinginterestsinsubsidiaries Proceedsfromsaleofnoncontrollinginterestsinsubsidiaries	630000000	USD
CY2016Q4	nrg	Variable Interest Entity Consolidated Carrying Amount Other Longterm Assets VariableInterestEntityConsolidatedCarryingAmountOtherLongtermAssets	954000000	USD
CY2015	nrg	Proceedsfromsaleofnoncontrollinginterestsinsubsidiaries Proceedsfromsaleofnoncontrollinginterestsinsubsidiaries	600000000	USD
CY2016	nrg	Proceedsfromsaleofnoncontrollinginterestsinsubsidiaries Proceedsfromsaleofnoncontrollinginterestsinsubsidiaries	0	USD
CY2014	nrg	Redeemable Noncontrolling Interest Cash Contributionsfrom Noncontrolling Interest Holders RedeemableNoncontrollingInterestCashContributionsfromNoncontrollingInterestHolders	36000000	USD
CY2015	nrg	Redeemable Noncontrolling Interest Cash Contributionsfrom Noncontrolling Interest Holders RedeemableNoncontrollingInterestCashContributionsfromNoncontrollingInterestHolders	27000000	USD
CY2016	nrg	Redeemable Noncontrolling Interest Cash Contributionsfrom Noncontrolling Interest Holders RedeemableNoncontrollingInterestCashContributionsfromNoncontrollingInterestHolders	56000000	USD
CY2016	nrg	Redeemable Noncontrolling Interest Distributionsfrom Noncontrolling Interests RedeemableNoncontrollingInterestDistributionsfromNoncontrollingInterests	-1000000	USD
CY2014Q4	nrg	Redeemable Preferred Stock Fair Value RedeemablePreferredStockFairValue	291000000	USD
CY2011Q4	nrg	Regulatory Charges Owed By Third Party RegulatoryChargesOwedByThirdParty	22000000	USD
CY2012Q3	nrg	Regulatory Charges Settled By Third Party RegulatoryChargesSettledByThirdParty	24000000	USD
CY2012Q3	nrg	Regulatory Charges Settled By Third Party Additional RegulatoryChargesSettledByThirdPartyAdditional	1000000	USD
CY2014	nrg	Revenues From Resale Of Purchased Power RevenuesFromResaleOfPurchasedPower	387000000	USD
CY2015	nrg	Revenues From Resale Of Purchased Power RevenuesFromResaleOfPurchasedPower	165000000	USD
CY2016	nrg	Revenues From Resale Of Purchased Power RevenuesFromResaleOfPurchasedPower	154000000	USD
CY2014	nrg	Reversal Of Previously Unrecognized Unrealized Gain Loss Acquired As Part Of Acquisition Trading Activity ReversalOfPreviouslyUnrecognizedUnrealizedGainLossAcquiredAsPartOfAcquisitionTradingActivity	-32000000	USD
CY2015	nrg	Reversal Of Previously Unrecognized Unrealized Gain Loss Acquired As Part Of Acquisition Trading Activity ReversalOfPreviouslyUnrecognizedUnrealizedGainLossAcquiredAsPartOfAcquisitionTradingActivity	-14000000	USD
CY2016	nrg	Reversal Of Previously Unrecognized Unrealized Gain Loss Acquired As Part Of Acquisition Trading Activity ReversalOfPreviouslyUnrecognizedUnrealizedGainLossAcquiredAsPartOfAcquisitionTradingActivity	0	USD
CY2014	nrg	Reversal Previously Unrecognized Unrealized Gains Losses Acquired As Part Of Acquisition Economic Hedges ReversalPreviouslyUnrecognizedUnrealizedGainsLossesAcquiredAsPartOfAcquisitionEconomicHedges	333000000	USD
CY2015	nrg	Reversal Previously Unrecognized Unrealized Gains Losses Acquired As Part Of Acquisition Economic Hedges ReversalPreviouslyUnrecognizedUnrealizedGainsLossesAcquiredAsPartOfAcquisitionEconomicHedges	106000000	USD
CY2016	nrg	Reversal Previously Unrecognized Unrealized Gains Losses Acquired As Part Of Acquisition Economic Hedges ReversalPreviouslyUnrecognizedUnrealizedGainsLossesAcquiredAsPartOfAcquisitionEconomicHedges	60000000	USD
CY2014	nrg	Reversal Previously Unrecognized Unrealized Gains Losses Settled Positions Economic Hedges ReversalPreviouslyUnrecognizedUnrealizedGainsLossesSettledPositionsEconomicHedges	15000000	USD
CY2015	nrg	Reversal Previously Unrecognized Unrealized Gains Losses Settled Positions Economic Hedges ReversalPreviouslyUnrecognizedUnrealizedGainsLossesSettledPositionsEconomicHedges	275000000	USD
CY2016	nrg	Reversal Previously Unrecognized Unrealized Gains Losses Settled Positions Economic Hedges ReversalPreviouslyUnrecognizedUnrealizedGainsLossesSettledPositionsEconomicHedges	245000000	USD
CY2014	nrg	Reversal Previously Unrecognized Unrealized Gains Losses Settled Positions Trading Activity ReversalPreviouslyUnrecognizedUnrealizedGainsLossesSettledPositionsTradingActivity	-1000000	USD
CY2015	nrg	Reversal Previously Unrecognized Unrealized Gains Losses Settled Positions Trading Activity ReversalPreviouslyUnrecognizedUnrealizedGainsLossesSettledPositionsTradingActivity	46000000	USD
CY2016	nrg	Reversal Previously Unrecognized Unrealized Gains Losses Settled Positions Trading Activity ReversalPreviouslyUnrecognizedUnrealizedGainsLossesSettledPositionsTradingActivity	-10000000	USD
CY2016Q2	nrg	Temporary Equity Redemption Percentage TemporaryEquityRedemptionPercentage	1.00	pure
CY2016Q2	nrg	Temporary Equity Redemption Percentage TemporaryEquityRedemptionPercentage	1.00	pure
CY2014	nrg	Unrealized Gain Loss On Derivatives Mark To Market Economic Hedging Activities UnrealizedGainLossOnDerivativesMarkToMarketEconomicHedgingActivities	13000000	USD
CY2015	nrg	Unrealized Gain Loss On Derivatives Mark To Market Economic Hedging Activities UnrealizedGainLossOnDerivativesMarkToMarketEconomicHedgingActivities	-372000000	USD
CY2016	nrg	Unrealized Gain Loss On Derivatives Mark To Market Economic Hedging Activities UnrealizedGainLossOnDerivativesMarkToMarketEconomicHedgingActivities	-285000000	USD
CY2014	nrg	Unrealized Gain Loss On Derivatives Mark To Market Trading Activites UnrealizedGainLossOnDerivativesMarkToMarketTradingActivites	14000000	USD
CY2015	nrg	Unrealized Gain Loss On Derivatives Mark To Market Trading Activites UnrealizedGainLossOnDerivativesMarkToMarketTradingActivites	-76000000	USD
CY2016	nrg	Unrealized Gain Loss On Derivatives Mark To Market Trading Activites UnrealizedGainLossOnDerivativesMarkToMarketTradingActivites	28000000	USD
CY2015Q4	nrg	Variable Interest Entity Consolidated Carrying Amount Current Assets VariableInterestEntityConsolidatedCarryingAmountCurrentAssets	84000000	USD
CY2016Q4	nrg	Variable Interest Entity Consolidated Carrying Amount Current Assets VariableInterestEntityConsolidatedCarryingAmountCurrentAssets	87000000	USD
CY2015Q4	nrg	Variable Interest Entity Consolidated Carrying Amount Current Liabilities VariableInterestEntityConsolidatedCarryingAmountCurrentLiabilities	56000000	USD
CY2016Q4	nrg	Variable Interest Entity Consolidated Carrying Amount Current Liabilities VariableInterestEntityConsolidatedCarryingAmountCurrentLiabilities	59000000	USD
CY2015Q4	nrg	Variable Interest Entity Consolidated Carrying Amount Longterm Debt VariableInterestEntityConsolidatedCarryingAmountLongtermDebt	366000000	USD
CY2016Q4	nrg	Variable Interest Entity Consolidated Carrying Amount Longterm Debt VariableInterestEntityConsolidatedCarryingAmountLongtermDebt	442000000	USD
CY2015Q4	nrg	Variable Interest Entity Consolidated Carrying Amount Net Property Plantand Equipment VariableInterestEntityConsolidatedCarryingAmountNetPropertyPlantandEquipment	1807000000	USD
CY2016Q4	nrg	Variable Interest Entity Consolidated Carrying Amount Net Property Plantand Equipment VariableInterestEntityConsolidatedCarryingAmountNetPropertyPlantandEquipment	1534000000	USD
CY2015Q4	nrg	Variable Interest Entity Consolidated Carrying Amount Noncontrolling Interest VariableInterestEntityConsolidatedCarryingAmountNoncontrollingInterest	493000000	USD
CY2016Q4	nrg	Variable Interest Entity Consolidated Carrying Amount Noncontrolling Interest VariableInterestEntityConsolidatedCarryingAmountNoncontrollingInterest	529000000	USD
CY2015Q4	nrg	Variable Interest Entity Consolidated Carrying Amount Other Longterm Assets VariableInterestEntityConsolidatedCarryingAmountOtherLongtermAssets	863000000	USD
CY2015Q4	nrg	Variable Interest Entity Consolidated Carrying Amount Other Longterm Liabilities VariableInterestEntityConsolidatedCarryingAmountOtherLongtermLiabilities	179000000	USD
CY2016Q4	nrg	Variable Interest Entity Consolidated Carrying Amount Other Longterm Liabilities VariableInterestEntityConsolidatedCarryingAmountOtherLongtermLiabilities	183000000	USD
CY2016Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	895000000	USD
CY2015Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	1157000000	USD
CY2016Q4	nrg	Working Capital Facility Amount Drawn WorkingCapitalFacilityAmountDrawn	14000000	USD
CY2015Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	869000000	USD
CY2016Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	1166000000	USD
CY2016Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	8000000	USD
CY2015Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	-5761000000	USD
CY2016Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	-6314000000	USD
CY2015	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment Period Increase Decrease AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipmentPeriodIncreaseDecrease	1000000000	USD
CY2013Q4	us-gaap	Accumulated Other Comprehensive Income Loss Cumulative Changes In Net Gain Loss From Cash Flow Hedges Effect Net Of Tax AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax	-23000000	USD
CY2014Q4	us-gaap	Accumulated Other Comprehensive Income Loss Cumulative Changes In Net Gain Loss From Cash Flow Hedges Effect Net Of Tax AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax	-68000000	USD
CY2015Q4	us-gaap	Accumulated Other Comprehensive Income Loss Cumulative Changes In Net Gain Loss From Cash Flow Hedges Effect Net Of Tax AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax	-101000000	USD
CY2016Q4	us-gaap	Accumulated Other Comprehensive Income Loss Cumulative Changes In Net Gain Loss From Cash Flow Hedges Effect Net Of Tax AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax	-66000000	USD
CY2014Q4	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	1000000	USD
CY2015Q4	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	-10000000	USD
CY2016Q4	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	-11000000	USD
CY2015Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-173000000	USD
CY2016Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-135000000	USD
CY2015Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	8296000000	USD
CY2016Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	8358000000	USD
CY2014	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	45000000	USD
CY2015	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	24000000	USD
CY2016	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	6000000	USD
CY2014	us-gaap	Advertising Expense AdvertisingExpense	87000000	USD
CY2015	us-gaap	Advertising Expense AdvertisingExpense	135000000	USD
CY2016	us-gaap	Advertising Expense AdvertisingExpense	53000000	USD
CY2014	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	42000000	USD
CY2015	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	41000000	USD
CY2016	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	24000000	USD
CY2015Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	21000000	USD
CY2016Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	30000000	USD
CY2014	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	-12000000	USD
CY2015	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	-11000000	USD
CY2016	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	3000000	USD
CY2014	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	268000000	USD
CY2015	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	277000000	USD
CY2016	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	278000000	USD
CY2016Q4	us-gaap	Amount Of Restricted Net Assets For Consolidated And Unconsolidated Subsidiaries AmountOfRestrictedNetAssetsForConsolidatedAndUnconsolidatedSubsidiaries	4900000000	USD
CY2014	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	17000000	shares
CY2015	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	22000000	shares
CY2016	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	5000000	shares
CY2014	us-gaap	Asset Impairment Charges AssetImpairmentCharges	97000000	USD
CY2015	us-gaap	Asset Impairment Charges AssetImpairmentCharges	5030000000	USD
CY2016	us-gaap	Asset Impairment Charges AssetImpairmentCharges	918000000	USD
CY2015Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	945000000	USD
CY2016Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	940000000	USD
CY2016	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	42000000	USD
CY2016	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	8000000	USD
CY2016	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	-103000000	USD
CY2015Q4	us-gaap	Assets Assets	32882000000	USD
CY2016Q4	us-gaap	Assets Assets	30355000000	USD
CY2015Q4	us-gaap	Assets Current AssetsCurrent	7391000000	USD
CY2016Q4	us-gaap	Assets Current AssetsCurrent	6395000000	USD
CY2015Q4	us-gaap	Assets Noncurrent AssetsNoncurrent	6759000000	USD
CY2016Q4	us-gaap	Assets Noncurrent AssetsNoncurrent	6048000000	USD
CY2014	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	29000000	USD
CY2015	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	21000000	USD
CY2016	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	26000000	USD
CY2014	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	8000000	USD
CY2015	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	14000000	USD
CY2016	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	11000000	USD
CY2015	us-gaap	Available For Sale Securities Gross Unrealized Gains AvailableForSaleSecuritiesGrossUnrealizedGains	202000000	USD
CY2016	us-gaap	Available For Sale Securities Gross Unrealized Gains AvailableForSaleSecuritiesGrossUnrealizedGains	217000000	USD
CY2015	us-gaap	Available For Sale Securities Gross Unrealized Loss AvailableForSaleSecuritiesGrossUnrealizedLoss	3000000	USD
CY2016	us-gaap	Available For Sale Securities Gross Unrealized Loss AvailableForSaleSecuritiesGrossUnrealizedLoss	4000000	USD
CY2015Q4	us-gaap	Business Acquisition Purchase Price Allocation Goodwill Expected Tax Deductible Amount BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount	620000000	USD
CY2016Q4	us-gaap	Business Acquisition Purchase Price Allocation Goodwill Expected Tax Deductible Amount BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount	547000000	USD
CY2014	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	84000000	USD
CY2015	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	10000000	USD
CY2016	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	8000000	USD
CY2014	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	-87000000	USD
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CY2016	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35	pure
CY2016Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	27000000	USD
CY2014	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	-8000000	USD
CY2015	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	-12000000	USD
CY2016	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	-4000000	USD
CY2015Q4	us-gaap	Energy Related Inventory Coal EnergyRelatedInventoryCoal	471000000	USD
CY2016Q4	us-gaap	Energy Related Inventory Coal EnergyRelatedInventoryCoal	334000000	USD
CY2015Q4	us-gaap	Energy Related Inventory Natural Gas In Storage EnergyRelatedInventoryNaturalGasInStorage	12000000	USD
CY2016Q4	us-gaap	Energy Related Inventory Natural Gas In Storage EnergyRelatedInventoryNaturalGasInStorage	28000000	USD
CY2015Q4	us-gaap	Energy Related Inventory Petroleum EnergyRelatedInventoryPetroleum	312000000	USD
CY2016Q4	us-gaap	Energy Related Inventory Petroleum EnergyRelatedInventoryPetroleum	289000000	USD
CY2014	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	87000000	USD
CY2015	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	73000000	USD
CY2016	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	81000000	USD
CY2015Q4	us-gaap	Equity Method Investments EquityMethodInvestments	1045000000	USD
CY2016Q4	us-gaap	Equity Method Investments EquityMethodInvestments	1120000000	USD
CY2015Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	1525000000	USD
CY2015Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	1500000000	USD
CY2016Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	1800000000	USD
CY2016Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	1775000000	USD
CY2016Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	198000000	USD
CY2016Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	110000000	USD
CY2016Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	112000000	USD
CY2016Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	129000000	USD
CY2016Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	136000000	USD
CY2014Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	3969000000	USD
CY2015Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	3835000000	USD
CY2016Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	3811000000	USD
CY2015Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	2310000000	USD
CY2016Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	2036000000	USD
CY2016	us-gaap	Finitelived Intangible Assets Acquired1 FinitelivedIntangibleAssetsAcquired1	18000000	USD
CY2014	us-gaap	Gain Loss On Cash Flow Hedge Ineffectiveness Net GainLossOnCashFlowHedgeIneffectivenessNet	0	USD
CY2015	us-gaap	Gain Loss On Cash Flow Hedge Ineffectiveness Net GainLossOnCashFlowHedgeIneffectivenessNet	0	USD
CY2016	us-gaap	Gain Loss On Cash Flow Hedge Ineffectiveness Net GainLossOnCashFlowHedgeIneffectivenessNet	0	USD
CY2014	us-gaap	Gain Loss On Disposition Of Intangible Assets GainLossOnDispositionOfIntangibleAssets	0	USD
CY2015	us-gaap	Gain Loss On Disposition Of Intangible Assets GainLossOnDispositionOfIntangibleAssets	0	USD
CY2016	us-gaap	Gain Loss On Disposition Of Intangible Assets GainLossOnDispositionOfIntangibleAssets	-47000000	USD
CY2014	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	4000000	USD
CY2015	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	-14000000	USD
CY2016	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	224000000	USD
CY2014	us-gaap	Gain On Sale Of Investments GainOnSaleOfInvestments	18000000	USD
CY2015	us-gaap	Gain On Sale Of Investments GainOnSaleOfInvestments	-14000000	USD
CY2016	us-gaap	Gain On Sale Of Investments GainOnSaleOfInvestments	0	USD
CY2014	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-95000000	USD
CY2015	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	75000000	USD
CY2016	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-142000000	USD
CY2015Q4	us-gaap	Goodwill Goodwill	999000000	USD
CY2016Q4	us-gaap	Goodwill Goodwill	662000000	USD
CY2015	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	1500000000	USD
CY2016Q4	us-gaap	Guarantees Fair Value Disclosure GuaranteesFairValueDisclosure	2200000	USD
CY2015	us-gaap	Impairment Of Intangible Assets Finitelived ImpairmentOfIntangibleAssetsFinitelived	-11000000	USD
CY2016	us-gaap	Impairment Of Intangible Assets Finitelived ImpairmentOfIntangibleAssetsFinitelived	-64000000	USD
CY2014	us-gaap	Impairment Of Investments ImpairmentOfInvestments	0	USD
CY2015	us-gaap	Impairment Of Investments ImpairmentOfInvestments	56000000	USD
CY2016	us-gaap	Impairment Of Investments ImpairmentOfInvestments	268000000	USD
CY2014	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	126000000	USD
CY2015	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-5105000000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-886000000	USD
CY2014	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	135000000	USD
CY2015	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-5094000000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-875000000	USD
CY2014	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	9000000	USD
CY2015	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	11000000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	11000000	USD
CY2014	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	38000000	USD
CY2015	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	36000000	USD
CY2016	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	27000000	USD
CY2014	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-49000000	USD
CY2015	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-37000000	USD
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	16000000	USD
CY2016Q4	us-gaap	Income Tax Receivable IncomeTaxReceivable	29000000	USD
CY2016	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-54000000	USD
CY2014	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3000000	USD
CY2015	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1342000000	USD
CY2014	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	6000000	USD
CY2015	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	3039000000	USD
CY2016	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	306000000	USD
CY2014	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	22000000	USD
CY2015	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	19000000	USD
CY2016	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	1000000	USD
CY2014	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	1000000	USD
CY2015	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	1000000	USD
CY2016	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	10000000	USD
CY2014	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	47000000	USD
CY2015	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-1783000000	USD
CY2016	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-306000000	USD
CY2014	us-gaap	Income Tax Reconciliation Nondeductible Expense Impairment Losses IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses	0	USD
CY2015	us-gaap	Income Tax Reconciliation Nondeductible Expense Impairment Losses IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses	340000000	USD
CY2016	us-gaap	Income Tax Reconciliation Nondeductible Expense Impairment Losses IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses	0	USD
CY2014	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	6000000	USD
CY2015	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-2000000	USD
CY2016	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-4000000	USD
CY2014	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	9000000	USD
CY2015	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-218000000	USD
CY2016	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	11000000	USD
CY2014	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	1000000	USD
CY2015	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	5000000	USD
CY2016	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	0	USD
CY2014	us-gaap	Income Tax Reconciliation Tax Credits Other IncomeTaxReconciliationTaxCreditsOther	48000000	USD
CY2015	us-gaap	Income Tax Reconciliation Tax Credits Other IncomeTaxReconciliationTaxCreditsOther	33000000	USD
CY2016	us-gaap	Income Tax Reconciliation Tax Credits Other IncomeTaxReconciliationTaxCreditsOther	26000000	USD
CY2014	us-gaap	Income Taxes Paid IncomeTaxesPaid	15000000	USD
CY2015	us-gaap	Income Taxes Paid IncomeTaxesPaid	17000000	USD
CY2016	us-gaap	Income Taxes Paid IncomeTaxesPaid	29000000	USD
CY2014	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-6000000	USD
CY2015	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	16000000	USD
CY2016	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	27000000	USD
CY2014	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-12000000	USD
CY2015	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-218000000	USD
CY2016	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-27000000	USD
CY2014	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	2000000	USD
CY2015	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-136000000	USD
CY2016	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	12000000	USD
CY2014	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	-154000000	USD
CY2015	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	1326000000	USD
CY2016	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	-43000000	USD
CY2014	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	245000000	USD
CY2015	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	26000000	USD
CY2016	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-134000000	USD
CY2014	us-gaap	Increase Decrease In Notes Receivables IncreaseDecreaseInNotesReceivables	-25000000	USD
CY2015	us-gaap	Increase Decrease In Notes Receivables IncreaseDecreaseInNotesReceivables	-18000000	USD
CY2016	us-gaap	Increase Decrease In Notes Receivables IncreaseDecreaseInNotesReceivables	-17000000	USD
CY2014	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	466000000	USD
CY2015	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	258000000	USD
CY2016	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	75000000	USD
CY2014	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	217000000	USD
CY2015	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	149000000	USD
CY2016	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	92000000	USD
CY2014	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-36000000	USD
CY2015	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-8000000	USD
CY2016	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	39000000	USD
CY2014	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	-57000000	USD
CY2015	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	-8000000	USD
CY2016	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	29000000	USD
CY2014	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	5000000	shares
CY2015	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
CY2016	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
CY2016Q4	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	0	USD
CY2014	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	29000000	USD
CY2015	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	30000000	USD
CY2016	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	43000000	USD
CY2014	us-gaap	Interest Expense InterestExpense	1119000000	USD
CY2015	us-gaap	Interest Expense InterestExpense	1128000000	USD
CY2016	us-gaap	Interest Expense InterestExpense	1061000000	USD
CY2014	us-gaap	Interest Paid Net InterestPaidNet	1067000000	USD
CY2015	us-gaap	Interest Paid Net InterestPaidNet	1172000000	USD
CY2016	us-gaap	Interest Paid Net InterestPaidNet	1106000000	USD
CY2015Q4	us-gaap	Interest Payable Current InterestPayableCurrent	242000000	USD
CY2016Q4	us-gaap	Interest Payable Current InterestPayableCurrent	220000000	USD
CY2015Q4	us-gaap	Inventory Net InventoryNet	1252000000	USD
CY2016Q4	us-gaap	Inventory Net InventoryNet	1111000000	USD
CY2015	us-gaap	Inventory Write Down InventoryWriteDown	19000000	USD
CY2015Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	0	USD
CY2016Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	0	USD
CY2015Q4	us-gaap	Liabilities Liabilities	27117000000	USD
CY2016Q4	us-gaap	Liabilities Liabilities	25863000000	USD
CY2015Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	32882000000	USD
CY2016Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	30355000000	USD
CY2015Q4	us-gaap	Liabilities Current LiabilitiesCurrent	4375000000	USD
CY2016Q4	us-gaap	Liabilities Current LiabilitiesCurrent	4382000000	USD
CY2015Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	22742000000	USD
CY2016Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	21481000000	USD
CY2015Q4	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation Current LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent	2000000	USD
CY2016Q4	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation Current LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent	0	USD
CY2015Q4	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation Noncurrent LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationNoncurrent	4000000	USD
CY2016Q4	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation Noncurrent LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationNoncurrent	12000000	USD
CY2015Q4	us-gaap	Liability For Uncertain Tax Positions Noncurrent LiabilityForUncertainTaxPositionsNoncurrent	35000000	USD
CY2016Q4	us-gaap	Liability For Uncertain Tax Positions Noncurrent LiabilityForUncertainTaxPositionsNoncurrent	37000000	USD
CY2014	us-gaap	Litigation Settlement Amount LitigationSettlementAmount	12000000	USD
CY2015Q4	us-gaap	Long Term Debt LongTermDebt	19620000000	USD
CY2016Q4	us-gaap	Long Term Debt LongTermDebt	19406000000	USD
CY2015Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	18983000000	USD
CY2016Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	18006000000	USD
CY2015Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	481000000	USD
CY2016Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	1220000000	USD
CY2016Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	13192000000	USD
CY2016Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	1222000000	USD
CY2016Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	1157000000	USD
CY2016Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	1273000000	USD
CY2016Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	839000000	USD
CY2016Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	1650000000	USD
CY2014	us-gaap	Management Fees Revenue ManagementFeesRevenue	10000000	USD
CY2015	us-gaap	Management Fees Revenue ManagementFeesRevenue	11000000	USD
CY2016	us-gaap	Management Fees Revenue ManagementFeesRevenue	11000000	USD
CY2014	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	208000000	USD
CY2015	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	307000000	USD
CY2016	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	247000000	USD
CY2015Q4	us-gaap	Minority Interest MinorityInterest	2727000000	USD
CY2016Q4	us-gaap	Minority Interest MinorityInterest	2405000000	USD
CY2014	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	57000000	USD
CY2015	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	159000000	USD
CY2016	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	158000000	USD
CY2016	us-gaap	Minority Interest Decrease From Redemptions MinorityInterestDecreaseFromRedemptions	-7000000	USD
CY2014	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	1265000000	USD
CY2015	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-432000000	USD
CY2016	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-794000000	USD
CY2014	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2903000000	USD
CY2015	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1485000000	USD
CY2016	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-824000000	USD
CY2014	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1510000000	USD
CY2015	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1309000000	USD
CY2016	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	2072000000	USD
CY2014	us-gaap	Net Income Loss NetIncomeLoss	134000000	USD
CY2015Q1	us-gaap	Net Income Loss NetIncomeLoss	-120000000	USD
CY2015Q2	us-gaap	Net Income Loss NetIncomeLoss	-14000000	USD
CY2015Q3	us-gaap	Net Income Loss NetIncomeLoss	66000000	USD
CY2015Q4	us-gaap	Net Income Loss NetIncomeLoss	-6314000000	USD
CY2015	us-gaap	Net Income Loss NetIncomeLoss	-6382000000	USD
CY2016Q1	us-gaap	Net Income Loss NetIncomeLoss	82000000	USD
CY2016Q2	us-gaap	Net Income Loss NetIncomeLoss	-271000000	USD
CY2016Q3	us-gaap	Net Income Loss NetIncomeLoss	402000000	USD
CY2016Q4	us-gaap	Net Income Loss NetIncomeLoss	-987000000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	-774000000	USD
CY2015Q4	us-gaap	Off Market Lease Unfavorable OffMarketLeaseUnfavorable	1146000000	USD
CY2016Q4	us-gaap	Off Market Lease Unfavorable OffMarketLeaseUnfavorable	1040000000	USD
CY2014	us-gaap	Operating Income Loss OperatingIncomeLoss	1271000000	USD
CY2014	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-2000000	USD
CY2015Q1	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-16000000	USD
CY2015Q2	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	5000000	USD
CY2015Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	1000000	USD
CY2015Q4	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-44000000	USD
CY2015	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-54000000	USD
CY2016Q1	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-35000000	USD
CY2016Q2	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-5000000	USD
CY2016Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-9000000	USD
CY2016Q4	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-68000000	USD
CY2016	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-117000000	USD
CY2014	us-gaap	Net Income Loss Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossAttributableToNonredeemableNoncontrollingInterest	17000000	USD
CY2014	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	-19000000	USD
CY2015	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	-17000000	USD
CY2016	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	-38000000	USD
CY2014	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	78000000	USD
CY2015Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-125000000	USD
CY2015Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-19000000	USD
CY2015Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	61000000	USD
CY2015Q4	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-6319000000	USD
CY2015	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-6402000000	USD
CY2016Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	77000000	USD
CY2016Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-193000000	USD
CY2016Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	402000000	USD
CY2016Q4	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-987000000	USD
CY2016	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-701000000	USD
CY2014	us-gaap	Net Income Loss Including Portion Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest	151000000	USD
CY2015	us-gaap	Net Income Loss Including Portion Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest	-6419000000	USD
CY2016	us-gaap	Net Income Loss Including Portion Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest	-853000000	USD
CY2014	us-gaap	Noncontrolling Interest Increase From Business Combination NoncontrollingInterestIncreaseFromBusinessCombination	352000000	USD
CY2014	us-gaap	Noncontrolling Interest Increase From Sale Of Parent Equity Interest NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest	125000000	USD
CY2014	us-gaap	Noncontrolling Interest Increase From Subsidiary Equity Issuance NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance	630000000	USD
CY2015	us-gaap	Noncontrolling Interest Increase From Subsidiary Equity Issuance NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance	599000000	USD
CY2014	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-1136000000	USD
CY2015	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-1054000000	USD
CY2016	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-1402000000	USD
CY2015Q4	us-gaap	Notes And Loans Receivable Net Current NotesAndLoansReceivableNetCurrent	20000000	USD
CY2016Q4	us-gaap	Notes And Loans Receivable Net Current NotesAndLoansReceivableNetCurrent	17000000	USD
CY2015Q4	us-gaap	Notes And Loans Receivable Net Noncurrent NotesAndLoansReceivableNetNoncurrent	53000000	USD
CY2016Q4	us-gaap	Notes And Loans Receivable Net Noncurrent NotesAndLoansReceivableNetNoncurrent	17000000	USD
CY2015Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	73000000	USD
CY2016Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	34000000	USD
CY2015Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	76000000	USD
CY2015Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	232000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-3000000	USD
CY2015Q4	us-gaap	Other Inventories Spare Parts OtherInventoriesSpareParts	437000000	USD
CY2015Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	379000000	USD
CY2015Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	-4727000000	USD
CY2015	us-gaap	Operating Income Loss OperatingIncomeLoss	-4040000000	USD
CY2016Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	476000000	USD
CY2016Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	87000000	USD
CY2016Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	755000000	USD
CY2016Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	-791000000	USD
CY2016	us-gaap	Operating Income Loss OperatingIncomeLoss	527000000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Due Future Minimum Sublease Rentals OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentals	14000000	USD
CY2014	us-gaap	Operating Leases Income Statement Contingent Revenue OperatingLeasesIncomeStatementContingentRevenue	544000000	USD
CY2015	us-gaap	Operating Leases Income Statement Contingent Revenue OperatingLeasesIncomeStatementContingentRevenue	777000000	USD
CY2016	us-gaap	Operating Leases Income Statement Contingent Revenue OperatingLeasesIncomeStatementContingentRevenue	936000000	USD
CY2015Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	568000000	USD
CY2016Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	543000000	USD
CY2016	us-gaap	Other Asset Impairment Charges OtherAssetImpairmentCharges	48000000	USD
CY2015Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	1214000000	USD
CY2016Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	1179000000	USD
CY2014	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	-88000000	USD
CY2015	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	69000000	USD
CY2016	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	0	USD
CY2014	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-7000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	17000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	1000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	2000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	3000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	0	USD
CY2014	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	-45000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	-15000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	35000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax	-21000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax	19000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax	1000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-8000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-11000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-1000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	-5000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	0	USD
CY2016	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	0	USD
CY2014	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-189000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	1000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	38000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	129000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-10000000	USD
CY2016Q4	us-gaap	Other Inventories Spare Parts OtherInventoriesSpareParts	413000000	USD
CY2015Q4	us-gaap	Other Inventory OtherInventory	20000000	USD
CY2016Q4	us-gaap	Other Inventory OtherInventory	47000000	USD
CY2015Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	386000000	USD
CY2016Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	418000000	USD
CY2015Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	900000000	USD
CY2016Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	930000000	USD
CY2014	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	22000000	USD
CY2015	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	33000000	USD
CY2016	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	42000000	USD
CY2014	us-gaap	Other Preferred Stock Dividends And Adjustments OtherPreferredStockDividendsAndAdjustments	47000000	USD
CY2015	us-gaap	Other Preferred Stock Dividends And Adjustments OtherPreferredStockDividendsAndAdjustments	0	USD
CY2016	us-gaap	Other Preferred Stock Dividends And Adjustments OtherPreferredStockDividendsAndAdjustments	0	USD
CY2014	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-85000000	USD
CY2015	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-11000000	USD
CY2016	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-48000000	USD
CY2014	us-gaap	Payments For Proceeds From Productive Assets PaymentsForProceedsFromProductiveAssets	-203000000	USD
CY2015	us-gaap	Payments For Proceeds From Productive Assets PaymentsForProceedsFromProductiveAssets	-27000000	USD
CY2016	us-gaap	Payments For Proceeds From Productive Assets PaymentsForProceedsFromProductiveAssets	-636000000	USD
CY2014	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	39000000	USD
CY2015	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	437000000	USD
CY2016	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2014	us-gaap	Payments For Repurchase Of Redeemable Preferred Stock PaymentsForRepurchaseOfRedeemablePreferredStock	0	USD
CY2015	us-gaap	Payments For Repurchase Of Redeemable Preferred Stock PaymentsForRepurchaseOfRedeemablePreferredStock	0	USD
CY2016Q2	us-gaap	Payments For Repurchase Of Redeemable Preferred Stock PaymentsForRepurchaseOfRedeemablePreferredStock	226000000	USD
CY2016	us-gaap	Payments For Repurchase Of Redeemable Preferred Stock PaymentsForRepurchaseOfRedeemablePreferredStock	226000000	USD
CY2014	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	67000000	USD
CY2015	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	21000000	USD
CY2016	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	89000000	USD
CY2014	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	196000000	USD
CY2015	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	201000000	USD
CY2016	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	76000000	USD
CY2014	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	16000000	USD
CY2015	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	21000000	USD
CY2016	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	5000000	USD
CY2014	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	619000000	USD
CY2015	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	629000000	USD
CY2016	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	551000000	USD
CY2015	us-gaap	Payments To Acquire Business Three Net Of Cash Acquired PaymentsToAcquireBusinessThreeNetOfCashAcquired	0	USD
CY2016	us-gaap	Payments To Acquire Business Three Net Of Cash Acquired PaymentsToAcquireBusinessThreeNetOfCashAcquired	0	USD
CY2015	us-gaap	Payments To Acquire Business Two Net Of Cash Acquired PaymentsToAcquireBusinessTwoNetOfCashAcquired	0	USD
CY2016	us-gaap	Payments To Acquire Business Two Net Of Cash Acquired PaymentsToAcquireBusinessTwoNetOfCashAcquired	0	USD
CY2014	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	2936000000	USD
CY2015	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	31000000	USD
CY2016	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	209000000	USD
CY2014	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	16000000	USD
CY2015	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	-41000000	USD
CY2016	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	1000000	USD
CY2014	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	909000000	USD
CY2015	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1283000000	USD
CY2016	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1244000000	USD
CY2015Q4	us-gaap	Pension And Other Postretirement And Postemployment Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementAndPostemploymentBenefitPlansLiabilitiesNoncurrent	588000000	USD
CY2016Q4	us-gaap	Pension And Other Postretirement And Postemployment Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementAndPostemploymentBenefitPlansLiabilitiesNoncurrent	553000000	USD
CY2015	us-gaap	Preferred Stock Accretion Of Redemption Discount PreferredStockAccretionOfRedemptionDiscount	11000000	USD
CY2016	us-gaap	Preferred Stock Accretion Of Redemption Discount PreferredStockAccretionOfRedemptionDiscount	2000000	USD
CY2014	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	56000000	USD
CY2015	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	20000000	USD
CY2016	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	5000000	USD
CY2015Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	455000000	USD
CY2016Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	423000000	USD
CY2014	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	21000000	USD
CY2015	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	1000000	USD
CY2016	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	2000000	USD
CY2014	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	21000000	USD
CY2015	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1000000	USD
CY2016	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1000000	USD
CY2014	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	4563000000	USD
CY2015	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	1004000000	USD
CY2016	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	5527000000	USD
CY2014	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	189000000	USD
CY2015	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	47000000	USD
CY2016	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	-156000000	USD
CY2014	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-18000000	USD
CY2015	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-22000000	USD
CY2016	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-13000000	USD
CY2014	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	189000000	USD
CY2015	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	47000000	USD
CY2016	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	-156000000	USD
CY2014	us-gaap	Proceeds From Repayments Of Debt ProceedsFromRepaymentsOfDebt	-3827000000	USD
CY2015	us-gaap	Proceeds From Repayments Of Debt ProceedsFromRepaymentsOfDebt	-1599000000	USD
CY2016	us-gaap	Proceeds From Repayments Of Debt ProceedsFromRepaymentsOfDebt	-5913000000	USD
CY2014	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	600000000	USD
CY2015	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	631000000	USD
CY2016	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	510000000	USD
CY2014	us-gaap	Profit Loss ProfitLoss	132000000	USD
CY2015Q1	us-gaap	Profit Loss ProfitLoss	-136000000	USD
CY2015Q2	us-gaap	Profit Loss ProfitLoss	-9000000	USD
CY2015Q3	us-gaap	Profit Loss ProfitLoss	67000000	USD
CY2015Q4	us-gaap	Profit Loss ProfitLoss	-6358000000	USD
CY2015	us-gaap	Profit Loss ProfitLoss	-6436000000	USD
CY2016Q1	us-gaap	Profit Loss ProfitLoss	47000000	USD
CY2016Q2	us-gaap	Profit Loss ProfitLoss	-276000000	USD
CY2016Q3	us-gaap	Profit Loss ProfitLoss	393000000	USD
CY2016Q4	us-gaap	Profit Loss ProfitLoss	-1055000000	USD
CY2016	us-gaap	Profit Loss ProfitLoss	-891000000	USD
CY2015Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	24493000000	USD
CY2016Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	24226000000	USD
CY2015Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	18732000000	USD
CY2016Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	17912000000	USD
CY2014	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	64000000	USD
CY2015	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	64000000	USD
CY2016	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	48000000	USD
CY2013Q4	us-gaap	Redeemable Noncontrolling Interest Equity Other Carrying Amount RedeemableNoncontrollingInterestEquityOtherCarryingAmount	2000000	USD
CY2014Q4	us-gaap	Redeemable Noncontrolling Interest Equity Other Carrying Amount RedeemableNoncontrollingInterestEquityOtherCarryingAmount	19000000	USD
CY2015Q4	us-gaap	Redeemable Noncontrolling Interest Equity Other Carrying Amount RedeemableNoncontrollingInterestEquityOtherCarryingAmount	29000000	USD
CY2016Q4	us-gaap	Redeemable Noncontrolling Interest Equity Other Carrying Amount RedeemableNoncontrollingInterestEquityOtherCarryingAmount	46000000	USD
CY2014	us-gaap	Redeemable Preferred Stock Dividends RedeemablePreferredStockDividends	9000000	USD
CY2014	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	88000000	USD
CY2015	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	146000000	USD
CY2016	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	90000000	USD
CY2015Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	414000000	USD
CY2016Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	446000000	USD
CY2015Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-3007000000	USD
CY2016Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-3787000000	USD
CY2015Q4	us-gaap	Retained Earnings Undistributed Earnings From Equity Method Investees RetainedEarningsUndistributedEarningsFromEquityMethodInvestees	55000000	USD
CY2016Q4	us-gaap	Retained Earnings Undistributed Earnings From Equity Method Investees RetainedEarningsUndistributedEarningsFromEquityMethodInvestees	101000000	USD
CY2014	us-gaap	Revenue From Related Parties RevenueFromRelatedParties	12000000	USD
CY2015	us-gaap	Revenue From Related Parties RevenueFromRelatedParties	8000000	USD
CY2016	us-gaap	Revenue From Related Parties RevenueFromRelatedParties	7000000	USD
CY2014	us-gaap	Revenues Revenues	15868000000	USD
CY2015Q1	us-gaap	Revenues Revenues	3829000000	USD
CY2015Q2	us-gaap	Revenues Revenues	3400000000	USD
CY2015Q3	us-gaap	Revenues Revenues	4434000000	USD
CY2015Q4	us-gaap	Revenues Revenues	3011000000	USD
CY2015	us-gaap	Revenues Revenues	14674000000	USD
CY2016Q1	us-gaap	Revenues Revenues	3229000000	USD
CY2016Q2	us-gaap	Revenues Revenues	2638000000	USD
CY2016Q3	us-gaap	Revenues Revenues	3952000000	USD
CY2016Q4	us-gaap	Revenues Revenues	2532000000	USD
CY2016	us-gaap	Revenues Revenues	12351000000	USD
CY2014	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	1016000000	USD
CY2015	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	1199000000	USD
CY2016	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	1101000000	USD
CY2014	us-gaap	Share Based Compensation ShareBasedCompensation	42000000	USD
CY2015	us-gaap	Share Based Compensation ShareBasedCompensation	41000000	USD
CY2016	us-gaap	Share Based Compensation ShareBasedCompensation	10000000	USD
CY2014	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	401000000	USD
CY2014	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	-1000000	USD
CY2015	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	6000000	USD
CY2016	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	6000000	USD
CY2013Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	10467000000	USD
CY2014Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	11676000000	USD
CY2015Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	5434000000	USD
CY2016Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4446000000	USD
CY2013Q4	us-gaap	Temporary Equity Carrying Amount Attributable To Parent TemporaryEquityCarryingAmountAttributableToParent	249000000	USD
CY2014Q4	us-gaap	Temporary Equity Carrying Amount Attributable To Parent TemporaryEquityCarryingAmountAttributableToParent	291000000	USD
CY2015Q4	us-gaap	Temporary Equity Carrying Amount Attributable To Parent TemporaryEquityCarryingAmountAttributableToParent	302000000	USD
CY2016Q4	us-gaap	Temporary Equity Carrying Amount Attributable To Parent TemporaryEquityCarryingAmountAttributableToParent	0	USD
CY2016Q2	us-gaap	Temporary Equity Carrying Amount Attributable To Parent TemporaryEquityCarryingAmountAttributableToParent	304000000	USD
CY2016Q2	us-gaap	Temporary Equity Liquidation Preference TemporaryEquityLiquidationPreference	344500000	USD
CY2015Q4	us-gaap	Temporary Equity Par Or Stated Value Per Share TemporaryEquityParOrStatedValuePerShare	0.01
CY2016Q4	us-gaap	Temporary Equity Par Or Stated Value Per Share TemporaryEquityParOrStatedValuePerShare	0.01
CY2012Q4	us-gaap	Temporary Equity Shares Authorized TemporaryEquitySharesAuthorized	10000000	shares
CY2014Q4	us-gaap	Temporary Equity Shares Authorized TemporaryEquitySharesAuthorized	10000000	shares
CY2015Q4	us-gaap	Temporary Equity Shares Authorized TemporaryEquitySharesAuthorized	10000000	shares
CY2016Q4	us-gaap	Temporary Equity Shares Authorized TemporaryEquitySharesAuthorized	10000000	shares
CY2015Q4	us-gaap	Temporary Equity Shares Issued TemporaryEquitySharesIssued	250000	shares
CY2016Q4	us-gaap	Temporary Equity Shares Issued TemporaryEquitySharesIssued	0	shares
CY2015Q4	us-gaap	Temporary Equity Shares Outstanding TemporaryEquitySharesOutstanding	250000	shares
CY2016Q4	us-gaap	Temporary Equity Shares Outstanding TemporaryEquitySharesOutstanding	0	shares
CY2015Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	102749908	shares
CY2016Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	102140814	shares
CY2015Q4	us-gaap	Treasury Stock Value TreasuryStockValue	2413000000	USD
CY2016Q4	us-gaap	Treasury Stock Value TreasuryStockValue	2399000000	USD
CY2014	us-gaap	Treasury Stock Value Acquired Par Value Method TreasuryStockValueAcquiredParValueMethod	44000000	USD
CY2015	us-gaap	Treasury Stock Value Acquired Par Value Method TreasuryStockValueAcquiredParValueMethod	437000000	USD
CY2014Q4	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	341000000	USD
CY2015Q4	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	309000000	USD
CY2016Q4	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	321000000	USD
CY2014	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	27000000	USD
CY2015	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-448000000	USD
CY2016	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-257000000	USD
CY2014Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	71000000	USD
CY2015Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	32000000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	34000000	USD
CY2015	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	25000000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2015	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	18000000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	6000000	USD
CY2015Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	3000000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	4000000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	1000000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Income Tax Penalties Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesExpense	1000000	USD
CY2014	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	-2000000	USD
CY2015	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	-3000000	USD
CY2015	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	4000000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	8000000	USD
CY2016Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On Fifth Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary	21000000	USD
CY2016Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On First Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary	25000000	USD
CY2016Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On Fourth Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary	11000000	USD
CY2016Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On Second Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary	17000000	USD
CY2016Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On Third Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary	13000000	USD
CY2016Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance Sheet Amount UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount	87000000	USD
CY2016Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Due After Five Years UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears	0	USD
CY2015Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	5000000	USD
CY2016Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	11000000	USD
CY2015Q4	us-gaap	Variable Interest Entity Consolidated Carrying Amount Assets VariableInterestEntityConsolidatedCarryingAmountAssets	2754000000	USD
CY2016Q4	us-gaap	Variable Interest Entity Consolidated Carrying Amount Assets VariableInterestEntityConsolidatedCarryingAmountAssets	2575000000	USD
CY2015Q4	us-gaap	Variable Interest Entity Consolidated Carrying Amount Assets And Liabilities Net VariableInterestEntityConsolidatedCarryingAmountAssetsAndLiabilitiesNet	1660000000	USD
CY2016Q4	us-gaap	Variable Interest Entity Consolidated Carrying Amount Assets And Liabilities Net VariableInterestEntityConsolidatedCarryingAmountAssetsAndLiabilitiesNet	1362000000	USD
CY2015Q4	us-gaap	Variable Interest Entity Consolidated Carrying Amount Liabilities VariableInterestEntityConsolidatedCarryingAmountLiabilities	601000000	USD
CY2016Q4	us-gaap	Variable Interest Entity Consolidated Carrying Amount Liabilities VariableInterestEntityConsolidatedCarryingAmountLiabilities	684000000	USD
CY2014	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	339000000	shares
CY2015Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	336000000	shares
CY2015Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	333000000	shares
CY2015Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	332000000	shares
CY2015Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	315000000	shares
CY2015	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	329000000	shares
CY2016Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	315000000	shares
CY2016Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	315000000	shares
CY2016Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	317000000	shares
CY2016Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	316000000	shares
CY2016	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	316000000	shares
CY2014	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	334000000	shares
CY2015Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	336000000	shares
CY2015Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	333000000	shares
CY2015Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	331000000	shares
CY2015Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	315000000	shares
CY2015	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	329000000	shares
CY2016Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	315000000	shares
CY2016Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	315000000	shares
CY2016Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	316000000	shares
CY2016Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	316000000	shares
CY2016	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	316000000	shares
CY2016	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-bottom:12px;text-align:justify;text-indent:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Concentrations of Credit Risk</font></div><div style="line-height:120%;padding-bottom:12px;text-align:justify;text-indent:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Financial instruments which potentially subject the Company to concentrations of credit risk consist primarily of trust funds, accounts receivable, notes receivable, derivatives, and investments in debt securities. Trust funds are held in accounts managed by experienced investment advisors. Certain accounts receivable, notes receivable, and derivative instruments are concentrated within entities engaged in the energy industry. These industry concentrations may impact the Company's overall exposure to credit risk, either positively or negatively, in that the customers may be similarly affected by changes in economic, industry or other conditions. Receivables and other contractual arrangements are subject to collateral requirements under the terms of enabling agreements. However, the Company believes that the credit risk posed by industry concentration is offset by the diversification and creditworthiness of its customer base. See </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">Note 4</font><font style="font-family:inherit;font-size:10pt;">, </font><font style="font-family:inherit;font-size:10pt;color:#000000;font-style:italic;text-decoration:none;">Fair Value of Financial Instruments</font><font style="font-family:inherit;font-size:10pt;font-style:italic;">,</font><font style="font-family:inherit;font-size:10pt;"> for a further discussion of derivative concentrations.</font></div><div style="line-height:120%;padding-bottom:12px;text-align:justify;text-indent:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;"></font></div></div>
CY2016	us-gaap	Nature Of Operations NatureOfOperations	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-bottom:12px;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;"></font><font style="font-family:inherit;font-size:10pt;color:#000000;font-weight:bold;text-decoration:none;">Nature of Business</font><font style="font-family:inherit;font-size:10pt;font-weight:bold;"> </font></div><div style="line-height:120%;padding-bottom:12px;text-align:justify;text-indent:26px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">General</font></div><div style="line-height:120%;padding-bottom:12px;text-align:justify;text-indent:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">NRG Energy, Inc., or NRG or the Company, is a leading integrated power company built on the strength of the nation's largest and most diverse competitive electric generation portfolio and leading retail electricity platform. NRG aims to create a sustainable energy future by producing, selling and delivering electricity and related products and services in major competitive power markets in the U.S. in a manner that delivers value to all of NRG's stakeholders. The Company owns and operates approximately </font><font style="font-family:inherit;font-size:10pt;">47,000</font><font style="font-family:inherit;font-size:10pt;"> MW of generation; engages in the trading of wholesale energy, capacity and related products; transacts in and trades fuel and transportation services; and directly sells energy, services, and innovative, sustainable products and services to retail customers under the names “NRG”, "Reliant" and other retail brand names owned by NRG.</font></div><div style="line-height:120%;padding-bottom:12px;text-align:justify;text-indent:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Generation consists of the Company’s wholesale operations, commercial operations, EPC operations, energy services and other critical related functions. NRG has traditionally referred to this business as its wholesale power generation business. In addition to the traditional functions from NRG’s wholesale power generation business, Generation also includes NRG’s business solutions, which include demand response, commodity sales, energy efficiency and energy management services, and NRG’s conventional distributed generation business, consisting of reliability, combined heat and power, thermal and district heating and cooling and large-scale distributed generation. </font></div><div style="line-height:120%;padding-bottom:12px;text-align:justify;text-indent:29px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Retail is a consumer facing business that includes the Company’s residential retail and C&I business. Products and services range from retail energy, portable solar and battery products home services, and a variety of bundled products which combine energy with protection products, energy efficiency and renewable energy solutions as well as other distributed and reliability products.</font></div><div style="line-height:120%;padding-bottom:12px;text-align:justify;text-indent:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Renewables operates the Company’s existing renewables business, including operation of the NRG Yield renewable assets. Renewables is also one of the largest solar and wind power developers and owner-operators in the U.S., having developed, constructed and financed a full range of solutions for utilities, schools, municipalities and commercial market segments. </font></div><div style="line-height:120%;padding-bottom:12px;text-align:justify;text-indent:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">GenOn Liquidity and Ability to Continue as a Going Concern</font></div><div style="line-height:120%;padding-bottom:12px;text-align:justify;text-indent:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">As disclosed in Note 12, </font><font style="font-family:inherit;font-size:10pt;font-style:italic;">Debt and Capital Leases</font><font style="font-family:inherit;font-size:10pt;">, </font><font style="font-family:inherit;font-size:10pt;">$691 million</font><font style="font-family:inherit;font-size:10pt;"> of GenOn's Senior Notes excluding </font><font style="font-family:inherit;font-size:10pt;">$8 million</font><font style="font-family:inherit;font-size:10pt;"> of associated premiums, are current within the GenOn consolidated balance sheet as of December 31, 2016 and are due on June 15, 2017. GenOn's future profitability continues to be adversely affected by (i) a sustained decline in natural gas prices and its resulting effect on wholesale power prices and capacity prices, and (ii) the inability of GenOn Mid-Atlantic and REMA to make distributions of cash and certain other restricted payments to GenOn. Based on current projections, GenOn is not expected to have sufficient liquidity to repay the GenOn Senior Notes due in June 2017. As a result of these factors, there is substantial doubt about GenOn's ability to continue as a going concern. As a result of the substantial doubt about GenOn’s ability to continue as a going concern, along with additional factors, there is substantial doubt about certain of GenOn’s subsidiaries’ ability to continue as a going concern.</font></div><div style="line-height:120%;padding-bottom:13px;text-align:justify;text-indent:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">As of December 31, 2016, GenOn has cash and cash equivalents of </font><font style="font-family:inherit;font-size:10pt;">$1.0 billion</font><font style="font-family:inherit;font-size:10pt;">, of which </font><font style="font-family:inherit;font-size:10pt;">$471 million</font><font style="font-family:inherit;font-size:10pt;"> and </font><font style="font-family:inherit;font-size:10pt;">$100 million</font><font style="font-family:inherit;font-size:10pt;"> is held by GenOn Mid-Atlantic and REMA, respectively. Under their respective operating leases, GenOn Mid-Atlantic and REMA are not permitted to make any distributions and other restricted payments unless: (a) they satisfy the fixed charge coverage ratio for the most recently ended period for four fiscal quarters; (b) they are projected to satisfy the fixed charge coverage ratio for each of the two following periods of four fiscal quarters, commencing with the fiscal quarter in which such payment is proposed to be made; and (c) no significant lease default or event of default has occurred and is continuing. Additionally, GenOn Mid-Atlantic and REMA must be in compliance with the requirement to provide credit support to the owner lessors securing their obligations to pay scheduled rent under their respective leases. As a result, GenOn Mid-Atlantic has not been able to make distributions of cash and certain other restricted payments since the quarter ended March 31, 2014 which was the last quarterly period for which GenOn Mid-Atlantic satisfied the conditions under its operating agreement. REMA has not satisfied the conditions under its operating agreement to make distributions of cash and certain other restricted payments since 2009.</font></div><div style="line-height:120%;padding-bottom:13px;text-align:justify;text-indent:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">NRG, GenOn's parent company, has no obligation to provide any financial support to GenOn other than under the secured intercompany revolving credit agreement between NRG and GenOn and NRG Americas. As of December 31, 2016, </font><font style="font-family:inherit;font-size:10pt;">$228 million</font><font style="font-family:inherit;font-size:10pt;"> was available to be used by GenOn under the </font><font style="font-family:inherit;font-size:10pt;">$500 million</font><font style="font-family:inherit;font-size:10pt;"> revolving credit agreement. As controlled group members, ERISA requires that NRG and GenOn are jointly and severally liable for the NRG Pension Plan for Bargained Employees and the NRG Pension Plan, including the pension liabilities associated with GenOn employees.</font></div><div style="line-height:120%;padding-bottom:12px;text-align:justify;text-indent:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">GenOn is currently considering all options available to it, including negotiations with creditors, refinancing the GenOn Senior Notes, potential sales of certain generating assets as well as the possibility for a need to file for protection under Chapter 11 of the U.S. Bankruptcy Code. During 2016, GenOn appointed two independent directors, retained advisors and established a separate audit committee as part of this process. Any resolution may have a material impact on the Company's statement of operations, cash flows and financial position. </font></div><div style="line-height:120%;text-align:justify;text-indent:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">As of December 31, 2016, GenOn represents </font><font style="font-family:inherit;font-size:10pt;">15.6%</font><font style="font-family:inherit;font-size:10pt;"> of the Company's consolidated total assets, </font><font style="font-family:inherit;font-size:10pt;">16.9%</font><font style="font-family:inherit;font-size:10pt;"> of the Company's consolidated total liabilities and contributed </font><font style="font-family:inherit;font-size:10pt;">$94 million</font><font style="font-family:inherit;font-size:10pt;"> to the Company's consolidated cash from operations in 2016.</font></div><div style="line-height:120%;text-align:justify;text-indent:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;padding-bottom:12px;text-align:justify;text-indent:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">NRG Yield, Inc. Ownership</font></div><div style="line-height:120%;padding-bottom:12px;text-align:justify;text-indent:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">In 2013, the Company formed NRG Yield, Inc. to own and operate a portfolio of contracted generation assets and thermal infrastructure assets that have historically been owned and/or operated by NRG and its subsidiaries. In 2013 and 2014, NRG Yield, Inc. issued Class A common stock to its public shareholders and utilized the proceeds to acquire a controlling interest in NRG Yield LLC, through its ownership of Class A units. At that time, the Company owned the Class B common stock of NRG Yield, Inc. and the Class B units of NRG Yield LLC. On May 14, 2015, NRG Yield, Inc. completed a stock split in connection with which each outstanding share of Class A common stock was split into one share of Class A common stock and one share of Class C common stock, and each outstanding share of Class B common stock was split into one share of Class B common stock and one share of Class D common stock. A similar split was effected at NRG Yield LLC with respect to its member units. The Company consolidates NRG Yield, Inc. for financial reporting purposes as it maintains a controlling voting interest, and presents the public ownership of the Class A and Class C common stock as noncontrolling interest. The Company receives distributions from NRG Yield LLC, through its ownership of Class B and Class D units. </font></div><div style="line-height:120%;text-align:justify;text-indent:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The following table represents the structure of NRG Yield, Inc. as of </font><font style="font-family:inherit;font-size:10pt;">December 31, 2016</font><font style="font-family:inherit;font-size:10pt;">:</font></div><div style="line-height:120%;padding-bottom:12px;text-align:justify;text-indent:30px;font-size:10pt;"><img src="yieldorgchart09302015a14.jpg" alt="yieldorgchart09302015a14.jpg" style="height:393px;width:533px;"></img><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></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-bottom:10px;text-align:justify;text-indent:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Reclassifications</font></div><div style="line-height:120%;padding-bottom:10px;text-align:justify;text-indent:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Certain prior-year amounts have been reclassified for comparative purposes. The reclassifications did not affect results from operations, net assets or cash flows.</font></div><div style="line-height:120%;padding-bottom:12px;text-align:justify;text-indent:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;"></font></div></div>
CY2016	us-gaap	Use Of Estimates UseOfEstimates	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-bottom:10px;text-align:justify;text-indent:30px;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%;padding-bottom:10px;text-align:justify;text-indent:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements, 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 these estimates. </font></div><div style="line-height:120%;padding-bottom:10px;text-align:justify;text-indent:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">In recording transactions and balances resulting from business operations, the Company uses estimates based on the best information available. Estimates are used for such items as plant depreciable lives, tax provisions, uncollectible accounts, actuarially determined benefit costs, the valuation of energy commodity contracts, environmental liabilities, legal costs incurred in connection with recorded loss contingencies, and assets acquired and liabilities assumed in business combinations, among others. In addition, estimates are used to test long-lived assets and goodwill for impairment and to determine the fair value of impaired assets. As better information becomes available or actual amounts are determinable, the recorded estimates are revised. Consequently, operating results can be affected by revisions to prior accounting estimates.</font></div></div>

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$NRG
NRG Energy Inc Stock $nrg

2015 Q4 Form 10-K Financial Statement

#000101387117000007 Filed on February 28, 2017

Income Statement

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$NRG NRG Energy Inc Stock $nrg

2015 Q4 Form 10-K Financial Statement

#000101387117000007 Filed on February 28, 2017

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NRG
NRG Energy Inc Stock $nrg