$NRG
NRG ENERGY, INC. Stock $nrg

$nrg Overview Financials Valuation SEC Filings Company Website

2017 Q4 Form 10-K Financial Statement

#000101387118000011 Filed on March 01, 2018

Income Statement

Concept	2017 Q4	2016 Q4	2016 Q3
Revenue	$2.154B	$2.184B	$3.421B
YoY Change	-1.37%	-27.47%	-22.85%
Cost Of Revenue	$1.297B	$1.590B	$2.440B
YoY Change	-18.43%	-28.54%	-19.79%
Gross Profit	$531.0M	$594.0M	$981.0M
YoY Change	-10.61%	-25.28%	-29.53%
Gross Profit Margin	24.65%	27.2%	28.68%
Selling, General & Admin	$202.0M	$294.0M	$277.0M
YoY Change	-31.29%	-11.98%	-15.29%
% of Gross Profit	38.04%	49.49%	28.24%
Research & Development	$4.000M	$24.00M	$21.00M
YoY Change	-83.33%	-41.46%	-44.74%
% of Gross Profit	0.75%	4.04%	2.14%
Depreciation & Amortization	$95.00M	$392.0M	$298.0M
YoY Change	-75.77%	-5.54%	-21.99%
% of Gross Profit	17.89%	65.99%	30.38%
Operating Expenses	$312.0M	$615.0M	$298.0M
YoY Change	-49.27%	-19.92%	-18.36%
Operating Profit	-$1.200B	-$658.0M	$429.0M
YoY Change	82.37%	-86.08%	13.19%
Interest Expense	-$119.0M	-$163.0M	$237.0M
YoY Change	-26.99%	-41.79%	-18.56%
% of Operating Profit			55.24%
Other Income/Expense, Net	$8.000M	$5.000M	-$272.0M
YoY Change	60.0%	-16.67%	2.64%
Pretax Income	-$1.508B	-$961.0M	$156.0M
YoY Change	56.92%	-80.68%	36.84%
Income Tax	-$47.00M	-$70.00M	$28.00M
% Of Pretax Income			17.95%
Net Earnings	-$1.535B	-$987.0M	$402.0M
YoY Change	55.52%	-84.37%	509.09%
Net Earnings / Revenue	-71.26%	-45.19%	11.75%
Basic Earnings Per Share	-$4.84	-$3.12	$1.27
Diluted Earnings Per Share	-$4.84	-$3.12	$1.27
COMMON SHARES
Basic Shares Outstanding	317.0M shares	316.0M shares	316.0M shares
Diluted Shares Outstanding	317.0M shares	316.0M shares	317.0M shares

Balance Sheet

Concept	2017 Q4	2016 Q4	2016 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$767.0M	$938.0M	$2.435B
YoY Change	-18.23%	-38.21%	7.51%
Cash & Equivalents	$770.0M	$591.0M	$1.217B
Short-Term Investments
Other Short-Term Assets	$2.111B	$3.997B	$2.166B
YoY Change	-47.19%	15.82%	-31.04%
Inventory	$453.0M	$721.0M	$1.017B
Prepaid Expenses
Receivables	$900.0M	$1.058B	$1.362B
Other Receivables	$0.00	$0.00	$34.00M
Total Short-Term Assets	$4.437B	$6.714B	$7.014B
YoY Change	-33.91%	-9.16%	-13.12%
LONG-TERM ASSETS
Property, Plant & Equipment	$5.974B	$15.37B	$18.20B
YoY Change	-61.13%	-17.95%	-17.2%
Goodwill	$539.0M	$662.0M	$999.0M
YoY Change	-18.58%	-33.73%	-60.09%
Intangibles
YoY Change
Long-Term Investments	$182.0M	$1.120B	$900.0M
YoY Change	-83.75%	7.18%	-15.73%
Other Assets	$310.0M	$841.0M	$1.198B
YoY Change	-63.14%	-30.72%	-15.99%
Total Long-Term Assets	$12.94B	$8.599B	$6.274B
YoY Change	50.53%	27.22%	-36.82%
TOTAL ASSETS
Total Short-Term Assets	$4.437B	$6.714B	$7.014B
Total Long-Term Assets	$12.94B	$8.599B	$6.274B
Total Assets	$23.36B	$30.68B	$31.49B
YoY Change	-23.88%	-6.69%	-21.25%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$684.0M	$782.0M	$945.0M
YoY Change	-12.53%	-10.01%	-19.44%
Accrued Expenses	$930.0M	$990.0M	$1.150B
YoY Change	-6.06%	22.22%	-5.89%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$204.0M	$516.0M	$1.221B
YoY Change	-60.47%	7.28%	167.18%
Total Short-Term Liabilities	$3.354B	$4.702B	$4.301B
YoY Change	-28.67%	7.47%	-0.81%
LONG-TERM LIABILITIES
Long-Term Debt	$9.180B	$15.96B	$18.02B
YoY Change	-42.47%	-15.94%	-8.06%
Other Long-Term Liabilities	$534.0M	$666.0M	$1.480B
YoY Change	-19.82%	-26.0%	0.14%
Total Long-Term Liabilities	$17.96B	$21.49B	$21.68B
YoY Change	-16.44%	-5.51%	-7.69%
TOTAL LIABILITIES
Total Short-Term Liabilities	$3.354B	$4.702B	$4.301B
Total Long-Term Liabilities	$17.96B	$21.49B	$21.68B
Total Liabilities	$21.31B	$26.19B	$25.98B
YoY Change	-18.64%	-3.42%	-6.62%
SHAREHOLDERS EQUITY
Retained Earnings	-$6.268B	-$3.787B	-$2.791B
YoY Change	65.51%	25.94%	-183.11%
Common Stock	$8.380B	$8.362B	$8.374B
YoY Change	0.22%	0.75%	-0.14%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$2.386B	$2.399B	$2.399B
YoY Change	-0.54%	-0.58%	2.96%
Treasury Stock Shares	101.6M shares	102.1M shares	102.1M shares
Shareholders Equity	-$346.0M	$2.041B	$3.042B
YoY Change
Total Liabilities & Shareholders Equity	$23.36B	$30.68B	$31.49B
YoY Change	-23.88%	-6.69%	-21.25%

Cashflow Statement

Concept	2017 Q4	2016 Q4	2016 Q3
OPERATING ACTIVITIES
Net Income	-$1.535B	-$987.0M	$402.0M
YoY Change	55.52%	-84.37%	509.09%
Depreciation, Depletion And Amortization	$95.00M	$392.0M	$298.0M
YoY Change	-75.77%	-5.54%	-21.99%
Cash From Operating Activities	$847.0M	$541.0M	$386.0M
YoY Change	56.56%	-751.81%	-58.67%
INVESTING ACTIVITIES
Capital Expenditures	-$82.00M	-$317.0M	-$217.0M
YoY Change	-74.13%	-19.54%	-29.08%
Acquisitions
YoY Change
Other Investing Activities	-$135.0M	-$220.0M	$432.0M
YoY Change	-38.64%	-256.03%	-754.55%
Cash From Investing Activities	-$217.0M	-$537.0M	$215.0M
YoY Change	-59.59%	112.25%	-157.8%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-924.0M	-328.0M	-57.00M
YoY Change	181.71%	-19.21%	-87.47%
NET CHANGE
Cash From Operating Activities	847.0M	541.0M	386.0M
Cash From Investing Activities	-217.0M	-537.0M	215.0M
Cash From Financing Activities	-924.0M	-328.0M	-57.00M
Net Change In Cash	-294.0M	-324.0M	544.0M
YoY Change	-9.26%	-56.33%	408.41%
FREE CASH FLOW
Cash From Operating Activities	$847.0M	$541.0M	$386.0M
Capital Expenditures	-$82.00M	-$317.0M	-$217.0M
Free Cash Flow	$929.0M	$858.0M	$603.0M
YoY Change	8.28%	175.88%	-51.37%

Facts In Submission

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CY2017	dei	Amendment Flag AmendmentFlag	false
CY2017	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2017	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2017	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2017
CY2017	dei	Document Period End Date DocumentPeriodEndDate	2017-12-31
CY2017	dei	Document Type DocumentType	10-K
CY2017	dei	Entity Central Index Key EntityCentralIndexKey	0001013871
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CY2017	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2017	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2017Q2	dei	Entity Public Float EntityPublicFloat	4880501096	USD
CY2017	dei	Entity Registrant Name EntityRegistrantName	NRG ENERGY, INC.
CY2017	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
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CY2017	nrg	Gains Losses On Extinguishment Of Debt Non Cash Portion GainsLossesOnExtinguishmentOfDebtNonCashPortion	-53000000	USD
CY2015	nrg	Gross Receipts Tax GrossReceiptsTax	110000000	USD
CY2016	nrg	Gross Receipts Tax GrossReceiptsTax	101000000	USD
CY2017	nrg	Gross Receipts Tax GrossReceiptsTax	92000000	USD
CY2017Q4	nrg	Guarantee Maturity Between One To Three Years GuaranteeMaturityBetweenOneToThreeYears	98000000	USD
CY2017Q4	nrg	Guarantee Maturity Between Three To Five Years GuaranteeMaturityBetweenThreeToFiveYears	264000000	USD
CY2017Q4	nrg	Guarantee Maturity Greater Than Five Years GuaranteeMaturityGreaterThanFiveYears	761000000	USD
CY2017Q4	nrg	Guarantee Maturity Less Than One Year GuaranteeMaturityLessThanOneYear	1467000000	USD
CY2016Q4	nrg	Guarantee Obligations Estimated Exposure GuaranteeObligationsEstimatedExposure	2767000000	USD
CY2017Q4	nrg	Guarantee Obligations Estimated Exposure GuaranteeObligationsEstimatedExposure	2590000000	USD
CY2015	nrg	Impairment Charges And Asset Write Downs ImpairmentChargesAndAssetWriteDowns	-4916000000	USD
CY2016	nrg	Impairment Charges And Asset Write Downs ImpairmentChargesAndAssetWriteDowns	-972000000	USD
CY2017	nrg	Impairment Charges And Asset Write Downs ImpairmentChargesAndAssetWriteDowns	-1788000000	USD
CY2015	nrg	Impairment Losses ImpairmentLosses	4916000000	USD
CY2016	nrg	Impairment Losses ImpairmentLosses	972000000	USD
CY2017	nrg	Impairment Losses ImpairmentLosses	1788000000	USD
CY2015	nrg	Income Lossfrom Equity Method Investmentof Unconsolidated Affiliates IncomeLossfromEquityMethodInvestmentofUnconsolidatedAffiliates	-37000000	USD
CY2016	nrg	Income Lossfrom Equity Method Investmentof Unconsolidated Affiliates IncomeLossfromEquityMethodInvestmentofUnconsolidatedAffiliates	-54000000	USD
CY2017	nrg	Income Lossfrom Equity Method Investmentof Unconsolidated Affiliates IncomeLossfromEquityMethodInvestmentofUnconsolidatedAffiliates	-55000000	USD
CY2015	nrg	Income Tax Reconciliation Impact Of Non Taxable Equity Earning IncomeTaxReconciliationImpactOfNonTaxableEquityEarning	-10000000	USD
CY2016	nrg	Income Tax Reconciliation Impact Of Non Taxable Equity Earning IncomeTaxReconciliationImpactOfNonTaxableEquityEarning	22000000	USD
CY2017	nrg	Income Tax Reconciliation Impact Of Non Taxable Equity Earning IncomeTaxReconciliationImpactOfNonTaxableEquityEarning	-5000000	USD
CY2017	nrg	Income Taxes Threshold Percentage IncomeTaxesThresholdPercentage	0.50	pure
CY2017Q4	nrg	Industry Mutual Insurance Company Multiplier IndustryMutualInsuranceCompanyMultiplier	10	pure
CY2015	nrg	Intercompany Dividend From Parent Financing Activities IntercompanyDividendFromParentFinancingActivities	0	USD
CY2016	nrg	Intercompany Dividend From Parent Financing Activities IntercompanyDividendFromParentFinancingActivities	0	USD
CY2017	nrg	Intercompany Dividend From Parent Financing Activities IntercompanyDividendFromParentFinancingActivities	0	USD
CY2015	nrg	Intercompany Dividend Proceeds Financing IntercompanyDividendProceedsFinancing	0	USD
CY2016	nrg	Intercompany Dividend Proceeds Financing IntercompanyDividendProceedsFinancing	0	USD
CY2017	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
CY2017	nrg	Intercompany Dividend Proceeds Investing IntercompanyDividendProceedsInvesting	0	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	-23000000	USD
CY2017	nrg	Investments In Proceeds From Sales Of Unconsolidated Affiliates InvestmentsInProceedsFromSalesOfUnconsolidatedAffiliates	-40000000	USD
CY2017Q4	nrg	Longterm Debtexcluding Unamortized Discount Premiumnet LongtermDebtexcludingUnamortizedDiscountPremiumnet	16638000000	USD
CY2017	nrg	Maximum Remaining Termunder Individual Purchased Power Contract MaximumRemainingTermunderIndividualPurchasedPowerContract	P5Y
CY2017Q4	nrg	Mutual Lost Revenue Insurance Maximum Weekly Recovery MutualLostRevenueInsuranceMaximumWeeklyRecovery	2520000	USD
CY2017Q4	nrg	Mutual Property Insurance Additional Blanket Policy Property Coverage MutualPropertyInsuranceAdditionalBlanketPolicyPropertyCoverage	1250000000	USD
CY2017Q4	nrg	Mutual Property Insurance Individual Maximum Property Coverage Limit MutualPropertyInsuranceIndividualMaximumPropertyCoverageLimit	1500000000	USD
CY2017Q4	nrg	Net Credit Exposure NetCreditExposure	196000000	USD
CY2017Q4	nrg	Net Deferred Tax Assetbeforevaluationallowance NetDeferredTaxAssetbeforevaluationallowance	1900000000	USD
CY2016Q4	nrg	Prepaid Expense And Other Assets Current Less Accounts Receivable Affiliate PrepaidExpenseAndOtherAssetsCurrentLessAccountsReceivableAffiliate	290000000	USD
CY2017Q4	nrg	Prepaid Expense And Other Assets Current Less Accounts Receivable Affiliate PrepaidExpenseAndOtherAssetsCurrentLessAccountsReceivableAffiliate	261000000	USD
CY2015	nrg	Proceeds From Payments To Intercompany Loans ProceedsFromPaymentsToIntercompanyLoans	0	USD
CY2016	nrg	Proceeds From Payments To Intercompany Loans ProceedsFromPaymentsToIntercompanyLoans	0	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
CY2017	nrg	Noncontrolling Interest Contributionsfrom Noncontrolling Interest Holders NoncontrollingInterestContributionsfromNoncontrollingInterestHolders	160000000	USD
CY2016Q4	nrg	Nuclear Decommissioning Trust Fund Liability Noncurrent NuclearDecommissioningTrustFundLiabilityNoncurrent	339000000	USD
CY2017Q4	nrg	Nuclear Decommissioning Trust Fund Liability Noncurrent NuclearDecommissioningTrustFundLiabilityNoncurrent	415000000	USD
CY2017Q4	nrg	Nuclear Insurance Financial Protection Pool Maximum Annual Assessment NuclearInsuranceFinancialProtectionPoolMaximumAnnualAssessment	19000000	USD
CY2017Q4	nrg	Nuclear Insurance Financial Protection Pool Maximum Assessment NuclearInsuranceFinancialProtectionPoolMaximumAssessment	127000000	USD
CY2017Q4	nrg	Nuclear Insurance Financial Protection Pool Maximum Assessment Administrative Fee As A Percent NuclearInsuranceFinancialProtectionPoolMaximumAssessmentAdministrativeFeeAsAPercent	0.05	pure
CY2017Q4	nrg	Nuclear Insurance Financial Protection Pool Nuclear Operator Maximum Annual Assessment NuclearInsuranceFinancialProtectionPoolNuclearOperatorMaximumAnnualAssessment	8000000	USD
CY2017Q4	nrg	Nuclear Insurance Financial Protection Pool Nuclear Operator Total Assessment NuclearInsuranceFinancialProtectionPoolNuclearOperatorTotalAssessment	112000000	USD
CY2017Q4	nrg	Nuclear Insurance Financial Protection Pool Value NuclearInsuranceFinancialProtectionPoolValue	13000000000	USD
CY2017Q4	nrg	Nuclear Insurance Per Incident Coverage Limit NuclearInsurancePerIncidentCoverageLimit	13440000000	USD
CY2017Q4	nrg	Nuclear Insurance Requirement Per Site NuclearInsuranceRequirementPerSite	450000000	USD
CY2017	nrg	Number Of Years Board Of Directors Of Industry Mutual Insurance Company Can Adjust Policy After Policy Expires NumberOfYearsBoardOfDirectorsOfIndustryMutualInsuranceCompanyCanAdjustPolicyAfterPolicyExpires	P6Y
CY2017Q4	nrg	Other Assets Noncurrent Emission Allowances OtherAssetsNoncurrentEmissionAllowances	9000000	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
CY2017	nrg	Other Comprehensive Income Loss Including Oc Ifor Nci OtherComprehensiveIncomeLossIncludingOCIforNCI	51000000	USD
CY2015	nrg	Payments To Settle Acquired Derivatives That Include Financing Elements PaymentsToSettleAcquiredDerivativesThatIncludeFinancingElements	-14000000	USD
CY2016	nrg	Payments To Settle Acquired Derivatives That Include Financing Elements PaymentsToSettleAcquiredDerivativesThatIncludeFinancingElements	-6000000	USD
CY2017	nrg	Payments To Settle Acquired Derivatives That Include Financing Elements PaymentsToSettleAcquiredDerivativesThatIncludeFinancingElements	-2000000	USD
CY2017	nrg	Period Beyondwhich Comapny Can Not Predict Holdingof Collateral PeriodBeyondwhichComapnyCanNotPredictHoldingofCollateral	P12M
CY2017	nrg	Periodofretrospectivepremiumadjustments Periodofretrospectivepremiumadjustments	P24M
CY2017Q4	nrg	Power Generation Capacity Megawatts PowerGenerationCapacityMegawatts	30000
CY2017	nrg	Proceeds From Payments To Intercompany Loans ProceedsFromPaymentsToIntercompanyLoans	0	USD
CY2015	nrg	Proceeds From Renewable Energy Grants ProceedsFromRenewableEnergyGrants	82000000	USD
CY2016	nrg	Proceeds From Renewable Energy Grants ProceedsFromRenewableEnergyGrants	36000000	USD
CY2017	nrg	Proceeds From Renewable Energy Grants ProceedsFromRenewableEnergyGrants	8000000	USD
CY2015	nrg	Proceedsfromsaleofnoncontrollinginterestsinsubsidiaries Proceedsfromsaleofnoncontrollinginterestsinsubsidiaries	600000000	USD
CY2016	nrg	Proceedsfromsaleofnoncontrollinginterestsinsubsidiaries Proceedsfromsaleofnoncontrollinginterestsinsubsidiaries	0	USD
CY2017	nrg	Proceedsfromsaleofnoncontrollinginterestsinsubsidiaries Proceedsfromsaleofnoncontrollinginterestsinsubsidiaries	0	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	33000000	USD
CY2017	nrg	Redeemable Noncontrolling Interest Cash Contributionsfrom Noncontrolling Interest Holders RedeemableNoncontrollingInterestCashContributionsfromNoncontrollingInterestHolders	99000000	USD
CY2015	nrg	Revenues From Resale Of Purchased Power RevenuesFromResaleOfPurchasedPower	165000000	USD
CY2016	nrg	Revenues From Resale Of Purchased Power RevenuesFromResaleOfPurchasedPower	154000000	USD
CY2017	nrg	Revenues From Resale Of Purchased Power RevenuesFromResaleOfPurchasedPower	187000000	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
CY2017	nrg	Reversal Of Previously Unrecognized Unrealized Gain Loss Acquired As Part Of Acquisition Trading Activity ReversalOfPreviouslyUnrecognizedUnrealizedGainLossAcquiredAsPartOfAcquisitionTradingActivity	0	USD
CY2015	nrg	Reversal Previously Recognized Unrealized Gains Losses Acquiredas Partof Acquisition Economic Hedges ReversalPreviouslyRecognizedUnrealizedGainsLossesAcquiredasPartofAcquisitionEconomicHedges	22000000	USD
CY2016	nrg	Reversal Previously Recognized Unrealized Gains Losses Acquiredas Partof Acquisition Economic Hedges ReversalPreviouslyRecognizedUnrealizedGainsLossesAcquiredasPartofAcquisitionEconomicHedges	12000000	USD
CY2017	nrg	Reversal Previously Recognized Unrealized Gains Losses Acquiredas Partof Acquisition Economic Hedges ReversalPreviouslyRecognizedUnrealizedGainsLossesAcquiredasPartofAcquisitionEconomicHedges	0	USD
CY2015	nrg	Reversal Previously Recognized Unrealized Gains Losses Settled Positions Economic Hedges ReversalPreviouslyRecognizedUnrealizedGainsLossesSettledPositionsEconomicHedges	162000000	USD
CY2016	nrg	Reversal Previously Recognized Unrealized Gains Losses Settled Positions Economic Hedges ReversalPreviouslyRecognizedUnrealizedGainsLossesSettledPositionsEconomicHedges	128000000	USD
CY2017	nrg	Reversal Previously Recognized Unrealized Gains Losses Settled Positions Economic Hedges ReversalPreviouslyRecognizedUnrealizedGainsLossesSettledPositionsEconomicHedges	-47000000	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
CY2017	nrg	Reversal Previously Unrecognized Unrealized Gains Losses Settled Positions Trading Activity ReversalPreviouslyUnrecognizedUnrealizedGainsLossesSettledPositionsTradingActivity	25000000	USD
CY2017Q4	nrg	Tax Cut And Jobs Act Of2017 Deferred Tax Asset Valuation Allowance Adjustment Change In Effective Tax Rate TaxCutAndJobsActOf2017DeferredTaxAssetValuationAllowanceAdjustmentChangeInEffectiveTaxRate	1800000000	USD
CY2015	nrg	Tax Cuts And Jobs Act Of2017 Incomplete Accounting Change In Tax Rate Effective Income Tax Rate Reconciliation TaxCutsAndJobsActOf2017IncompleteAccountingChangeInTaxRateEffectiveIncomeTaxRateReconciliation	0	USD
CY2016	nrg	Tax Cuts And Jobs Act Of2017 Incomplete Accounting Change In Tax Rate Effective Income Tax Rate Reconciliation TaxCutsAndJobsActOf2017IncompleteAccountingChangeInTaxRateEffectiveIncomeTaxRateReconciliation	0	USD
CY2017	nrg	Tax Cuts And Jobs Act Of2017 Incomplete Accounting Change In Tax Rate Effective Income Tax Rate Reconciliation TaxCutsAndJobsActOf2017IncompleteAccountingChangeInTaxRateEffectiveIncomeTaxRateReconciliation	733000000	USD
CY2015	nrg	Tax Cuts And Jobs Actof2017 Incomeplete Accounting Effective Income Tax Rate Reconciliation Changein Deferred Tax Assets Valuation Allowance Amount TaxCutsAndJobsActof2017IncomepleteAccountingEffectiveIncomeTaxRateReconciliationChangeinDeferredTaxAssetsValuationAllowanceAmount	0	USD
CY2016	nrg	Tax Cuts And Jobs Actof2017 Incomeplete Accounting Effective Income Tax Rate Reconciliation Changein Deferred Tax Assets Valuation Allowance Amount TaxCutsAndJobsActof2017IncomepleteAccountingEffectiveIncomeTaxRateReconciliationChangeinDeferredTaxAssetsValuationAllowanceAmount	0	USD
CY2017	nrg	Tax Cuts And Jobs Actof2017 Incomeplete Accounting Effective Income Tax Rate Reconciliation Changein Deferred Tax Assets Valuation Allowance Amount TaxCutsAndJobsActof2017IncomepleteAccountingEffectiveIncomeTaxRateReconciliationChangeinDeferredTaxAssetsValuationAllowanceAmount	-660000000	USD
CY2016Q2	nrg	Temporary Equity Redemption Percentage TemporaryEquityRedemptionPercentage	1.00	pure
CY2016Q2	nrg	Temporary Equity Redemption Percentage TemporaryEquityRedemptionPercentage	1.00	pure
CY2015	nrg	Unrealized Gain Loss On Derivatives Mark To Market Economic Hedging Activities UnrealizedGainLossOnDerivativesMarkToMarketEconomicHedgingActivities	-193000000	USD
CY2016	nrg	Unrealized Gain Loss On Derivatives Mark To Market Economic Hedging Activities UnrealizedGainLossOnDerivativesMarkToMarketEconomicHedgingActivities	-134000000	USD
CY2017	nrg	Unrealized Gain Loss On Derivatives Mark To Market Economic Hedging Activities UnrealizedGainLossOnDerivativesMarkToMarketEconomicHedgingActivities	193000000	USD
CY2015	nrg	Unrealized Gain Losson Derivatives Mark To Market Trading Activities UnrealizedGainLossonDerivativesMarkToMarketTradingActivities	-76000000	USD
CY2016	nrg	Unrealized Gain Losson Derivatives Mark To Market Trading Activities UnrealizedGainLossonDerivativesMarkToMarketTradingActivities	28000000	USD
CY2017	nrg	Unrealized Gain Losson Derivatives Mark To Market Trading Activities UnrealizedGainLossonDerivativesMarkToMarketTradingActivities	-11000000	USD
CY2016Q4	nrg	Variable Interest Entity Consolidated Carrying Amount Current Assets VariableInterestEntityConsolidatedCarryingAmountCurrentAssets	87000000	USD
CY2017Q4	nrg	Variable Interest Entity Consolidated Carrying Amount Current Assets VariableInterestEntityConsolidatedCarryingAmountCurrentAssets	118000000	USD
CY2016Q4	nrg	Variable Interest Entity Consolidated Carrying Amount Current Liabilities VariableInterestEntityConsolidatedCarryingAmountCurrentLiabilities	59000000	USD
CY2017Q4	nrg	Variable Interest Entity Consolidated Carrying Amount Current Liabilities VariableInterestEntityConsolidatedCarryingAmountCurrentLiabilities	96000000	USD
CY2016Q4	nrg	Variable Interest Entity Consolidated Carrying Amount Longterm Debt VariableInterestEntityConsolidatedCarryingAmountLongtermDebt	442000000	USD
CY2017Q4	nrg	Variable Interest Entity Consolidated Carrying Amount Longterm Debt VariableInterestEntityConsolidatedCarryingAmountLongtermDebt	661000000	USD
CY2016Q4	nrg	Variable Interest Entity Consolidated Carrying Amount Net Property Plantand Equipment VariableInterestEntityConsolidatedCarryingAmountNetPropertyPlantandEquipment	1534000000	USD
CY2017Q4	nrg	Variable Interest Entity Consolidated Carrying Amount Net Property Plantand Equipment VariableInterestEntityConsolidatedCarryingAmountNetPropertyPlantandEquipment	2337000000	USD
CY2016Q4	nrg	Variable Interest Entity Consolidated Carrying Amount Noncontrolling Interest VariableInterestEntityConsolidatedCarryingAmountNoncontrollingInterest	529000000	USD
CY2017Q4	nrg	Variable Interest Entity Consolidated Carrying Amount Noncontrolling Interest VariableInterestEntityConsolidatedCarryingAmountNoncontrollingInterest	507000000	USD
CY2016Q4	nrg	Variable Interest Entity Consolidated Carrying Amount Other Longterm Assets VariableInterestEntityConsolidatedCarryingAmountOtherLongtermAssets	954000000	USD
CY2017Q4	nrg	Variable Interest Entity Consolidated Carrying Amount Other Longterm Assets VariableInterestEntityConsolidatedCarryingAmountOtherLongtermAssets	658000000	USD
CY2016Q4	nrg	Variable Interest Entity Consolidated Carrying Amount Other Longterm Liabilities VariableInterestEntityConsolidatedCarryingAmountOtherLongtermLiabilities	183000000	USD
CY2017Q4	nrg	Variable Interest Entity Consolidated Carrying Amount Other Longterm Liabilities VariableInterestEntityConsolidatedCarryingAmountOtherLongtermLiabilities	209000000	USD
CY2016Q4	nrg	Variable Interest Entity Consolidated Carrying Amount Redeemable Noncontrolling Interest VariableInterestEntityConsolidatedCarryingAmountRedeemableNoncontrollingInterest	46000000	USD
CY2017Q4	nrg	Variable Interest Entity Consolidated Carrying Amount Redeemable Noncontrolling Interest VariableInterestEntityConsolidatedCarryingAmountRedeemableNoncontrollingInterest	78000000	USD
CY2017Q4	nrg	Working Capital Facility Amount Drawn WorkingCapitalFacilityAmountDrawn	14000000	USD
CY2016Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	782000000	USD
CY2017Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	881000000	USD
CY2016Q4	us-gaap	Accounts Payable Related Parties Current AccountsPayableRelatedPartiesCurrent	31000000	USD
CY2017Q4	us-gaap	Accounts Payable Related Parties Current AccountsPayableRelatedPartiesCurrent	33000000	USD
CY2016Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	1058000000	USD
CY2017Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	1079000000	USD
CY2017Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	7000000	USD
CY2016Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	5336000000	USD
CY2017Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	4465000000	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
CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Cumulative Changes In Net Gain Loss From Cash Flow Hedges Effect Net Of Tax AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax	-54000000	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
CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	-2000000	USD
CY2016Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-135000000	USD
CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-72000000	USD
CY2016Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	8358000000	USD
CY2017Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	8376000000	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
CY2017	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	29000000	USD
CY2015	us-gaap	Advertising Expense AdvertisingExpense	135000000	USD
CY2016	us-gaap	Advertising Expense AdvertisingExpense	53000000	USD
CY2017	us-gaap	Advertising Expense AdvertisingExpense	42000000	USD
CY2015	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	40000000	USD
CY2016	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	23000000	USD
CY2017	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	44000000	USD
CY2016Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	29000000	USD
CY2017Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	28000000	USD
CY2015	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	47000000	USD
CY2016	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	55000000	USD
CY2017	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	60000000	USD
CY2015	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	238000000	USD
CY2016	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	231000000	USD
CY2017	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	207000000	USD
CY2015	us-gaap	Amortization Of Power Contracts Emission Credits AmortizationOfPowerContractsEmissionCredits	45000000	USD
CY2016	us-gaap	Amortization Of Power Contracts Emission Credits AmortizationOfPowerContractsEmissionCredits	49000000	USD
CY2017	us-gaap	Amortization Of Power Contracts Emission Credits AmortizationOfPowerContractsEmissionCredits	51000000	USD
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
CY2017	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	5000000	shares
CY2015	us-gaap	Asset Impairment Charges AssetImpairmentCharges	4860000000	USD
CY2016	us-gaap	Asset Impairment Charges AssetImpairmentCharges	702000000	USD
CY2017	us-gaap	Asset Impairment Charges AssetImpairmentCharges	1709000000	USD
CY2016Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	735000000	USD
CY2017Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	771000000	USD
CY2017	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	35000000	USD
CY2017	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	21000000	USD
CY2017	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	-3000000	USD
CY2016Q4	us-gaap	Assets Assets	30682000000	USD
CY2017Q4	us-gaap	Assets Assets	23318000000	USD
CY2016Q4	us-gaap	Assets Current AssetsCurrent	6714000000	USD
CY2017Q4	us-gaap	Assets Current AssetsCurrent	4415000000	USD
CY2016Q4	us-gaap	Assets Noncurrent AssetsNoncurrent	8599000000	USD
CY2017	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	22000000	USD
CY2015	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	14000000	USD
CY2017Q4	us-gaap	Assets Noncurrent AssetsNoncurrent	4995000000	USD
CY2016Q4	us-gaap	Assets Of Disposal Group Including Discontinued Operation Current AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent	9000000	USD
CY2017Q4	us-gaap	Assets Of Disposal Group Including Discontinued Operation Current AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent	115000000	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
CY2016	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	11000000	USD
CY2017	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	8000000	USD
CY2016	us-gaap	Available For Sale Securities Gross Unrealized Gains AvailableForSaleSecuritiesGrossUnrealizedGains	217000000	USD
CY2017	us-gaap	Available For Sale Securities Gross Unrealized Gains AvailableForSaleSecuritiesGrossUnrealizedGains	276000000	USD
CY2016	us-gaap	Available For Sale Securities Gross Unrealized Loss AvailableForSaleSecuritiesGrossUnrealizedLoss	4000000	USD
CY2017	us-gaap	Available For Sale Securities Gross Unrealized Loss AvailableForSaleSecuritiesGrossUnrealizedLoss	2000000	USD
CY2016Q4	us-gaap	Business Acquisition Purchase Price Allocation Goodwill Expected Tax Deductible Amount BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount	547000000	USD
CY2017Q4	us-gaap	Business Acquisition Purchase Price Allocation Goodwill Expected Tax Deductible Amount BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount	460000000	USD
CY2017	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	44000000	USD
CY2015	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	-44000000	USD
CY2016	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	35000000	USD
CY2017	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	70000000	USD
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CY2017Q3	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Net Of Tax Per Diluted Share DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare	-0.08
CY2017Q4	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Net Of Tax Per Diluted Share DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare	0.04
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CY2017Q4	us-gaap	Disposal Group Including Discontinued Operation Accrued Liabilities Current DisposalGroupIncludingDiscontinuedOperationAccruedLiabilitiesCurrent	72000000	USD
CY2016Q4	us-gaap	Disposal Group Including Discontinued Operation Assets Noncurrent DisposalGroupIncludingDiscontinuedOperationAssetsNoncurrent	2961000000	USD
CY2017Q4	us-gaap	Disposal Group Including Discontinued Operation Assets Noncurrent DisposalGroupIncludingDiscontinuedOperationAssetsNoncurrent	0	USD
CY2017Q4	us-gaap	Disposal Group Including Discontinued Operation Other Current Assets DisposalGroupIncludingDiscontinuedOperationOtherCurrentAssets	0	USD
CY2016Q4	us-gaap	Disposal Group Including Discontinued Operation Other Noncurrent Assets DisposalGroupIncludingDiscontinuedOperationOtherNoncurrentAssets	10000000	USD
CY2016Q4	us-gaap	Disposal Group Including Discontinued Operation Deferred Tax Assets DisposalGroupIncludingDiscontinuedOperationDeferredTaxAssets	2093000000	USD
CY2017Q4	us-gaap	Disposal Group Including Discontinued Operation Deferred Tax Assets DisposalGroupIncludingDiscontinuedOperationDeferredTaxAssets	0	USD
CY2016Q4	us-gaap	Disposal Group Including Discontinued Operation Deferred Tax Liabilities DisposalGroupIncludingDiscontinuedOperationDeferredTaxLiabilities	6000000	USD
CY2017Q4	us-gaap	Disposal Group Including Discontinued Operation Deferred Tax Liabilities DisposalGroupIncludingDiscontinuedOperationDeferredTaxLiabilities	0	USD
CY2016Q4	us-gaap	Disposal Group Including Discontinued Operation Other Current Assets DisposalGroupIncludingDiscontinuedOperationOtherCurrentAssets	1919000000	USD
CY2017Q4	us-gaap	Disposal Group Including Discontinued Operation Other Noncurrent Assets DisposalGroupIncludingDiscontinuedOperationOtherNoncurrentAssets	43000000	USD
CY2016Q4	us-gaap	Disposal Group Including Discontinued Operation Other Noncurrent Liabilities DisposalGroupIncludingDiscontinuedOperationOtherNoncurrentLiabilities	3184000000	USD
CY2017Q4	us-gaap	Disposal Group Including Discontinued Operation Other Noncurrent Liabilities DisposalGroupIncludingDiscontinuedOperationOtherNoncurrentLiabilities	0	USD
CY2015	us-gaap	Disposal Group Not Discontinued Operation Gain Loss On Disposal DisposalGroupNotDiscontinuedOperationGainLossOnDisposal	0	USD
CY2016	us-gaap	Disposal Group Not Discontinued Operation Gain Loss On Disposal DisposalGroupNotDiscontinuedOperationGainLossOnDisposal	-80000000	USD
CY2017	us-gaap	Disposal Group Not Discontinued Operation Gain Loss On Disposal DisposalGroupNotDiscontinuedOperationGainLossOnDisposal	16000000	USD
CY2015	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	191000000	USD
CY2016	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	74000000	USD
CY2017	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	38000000	USD
CY2015	us-gaap	Dividends Preferred Stock DividendsPreferredStock	20000000	USD
CY2016	us-gaap	Dividends Preferred Stock DividendsPreferredStock	5000000	USD
CY2016Q4	us-gaap	Due From Affiliate Current DueFromAffiliateCurrent	114000000	USD
CY2017Q4	us-gaap	Due From Affiliate Current DueFromAffiliateCurrent	95000000	USD
CY2016Q4	us-gaap	Due From Related Parties Current DueFromRelatedPartiesCurrent	0	USD
CY2017Q4	us-gaap	Due From Related Parties Current DueFromRelatedPartiesCurrent	95000000	USD
CY2016Q4	us-gaap	Due To Affiliate Current DueToAffiliateCurrent	0	USD
CY2017Q4	us-gaap	Due To Affiliate Current DueToAffiliateCurrent	161000000	USD
CY2016Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.24
CY2016Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.61
CY2016Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.27
CY2016Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-3.12
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CY2017Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.98
CY2017Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.54
CY2017Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-4.84
CY2015	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-19.46
CY2016	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-2.22
CY2017	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-6.79
CY2016Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.24
CY2016Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.61
CY2016Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.27
CY2016Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-3.12
CY2017Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.52
CY2017Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.98
CY2017Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.53
CY2017Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-4.84
CY2015	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	10000000	USD
CY2016	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	1000000	USD
CY2017	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	-1000000	USD
CY2015	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.270	pure
CY2016	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.005	pure
CY2017	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.005	pure
CY2016	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35	pure
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35	pure
CY2017Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	37000000	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
CY2017	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	-5000000	USD
CY2016Q4	us-gaap	Energy Related Inventory Coal EnergyRelatedInventoryCoal	219000000	USD
CY2017Q4	us-gaap	Energy Related Inventory Coal EnergyRelatedInventoryCoal	126000000	USD
CY2016Q4	us-gaap	Energy Related Inventory Natural Gas In Storage EnergyRelatedInventoryNaturalGasInStorage	28000000	USD
CY2017Q4	us-gaap	Energy Related Inventory Natural Gas In Storage EnergyRelatedInventoryNaturalGasInStorage	24000000	USD
CY2016Q4	us-gaap	Energy Related Inventory Petroleum EnergyRelatedInventoryPetroleum	142000000	USD
CY2017Q4	us-gaap	Energy Related Inventory Petroleum EnergyRelatedInventoryPetroleum	90000000	USD
CY2015	us-gaap	Equity Method Investment Realized Gain Loss On Disposal EquityMethodInvestmentRealizedGainLossOnDisposal	-14000000	USD
CY2016	us-gaap	Equity Method Investment Realized Gain Loss On Disposal EquityMethodInvestmentRealizedGainLossOnDisposal	0	USD
CY2017	us-gaap	Equity Method Investment Realized Gain Loss On Disposal EquityMethodInvestmentRealizedGainLossOnDisposal	0	USD
CY2016Q4	us-gaap	Equity Method Investments EquityMethodInvestments	1120000000	USD
CY2017Q4	us-gaap	Equity Method Investments EquityMethodInvestments	1038000000	USD
CY2016Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	1700000000	USD
CY2016Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	1688000000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	1818000000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	1800000000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	159000000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	120000000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	128000000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	132000000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	150000000	USD
CY2015Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	3721000000	USD
CY2016Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	3661000000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	3564000000	USD
CY2016Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	1973000000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	1746000000	USD
CY2016	us-gaap	Finitelived Intangible Assets Acquired1 FinitelivedIntangibleAssetsAcquired1	18000000	USD
CY2017	us-gaap	Finitelived Intangible Assets Acquired1 FinitelivedIntangibleAssetsAcquired1	18000000	USD
CY2015	us-gaap	Gain Loss On Disposition Of Intangible Assets GainLossOnDispositionOfIntangibleAssets	24000000	USD
CY2016	us-gaap	Gain Loss On Disposition Of Intangible Assets GainLossOnDispositionOfIntangibleAssets	-34000000	USD
CY2017	us-gaap	Gain Loss On Disposition Of Intangible Assets GainLossOnDispositionOfIntangibleAssets	-25000000	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	-70000000	USD
CY2017	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	34000000	USD
CY2015	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	10000000	USD
CY2016	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-142000000	USD
CY2017	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-53000000	USD
CY2016Q4	us-gaap	Goodwill Goodwill	662000000	USD
CY2017Q4	us-gaap	Goodwill Goodwill	539000000	USD
CY2016	us-gaap	Impairment Of Intangible Assets Finitelived ImpairmentOfIntangibleAssetsFinitelived	64000000	USD
CY2017	us-gaap	Impairment Of Intangible Assets Finitelived ImpairmentOfIntangibleAssetsFinitelived	26000000	USD
CY2015Q4	us-gaap	Impairment Of Investments ImpairmentOfInvestments	56000000	USD
CY2015	us-gaap	Impairment Of Investments ImpairmentOfInvestments	56000000	USD
CY2016	us-gaap	Impairment Of Investments ImpairmentOfInvestments	268000000	USD
CY2017	us-gaap	Impairment Of Investments ImpairmentOfInvestments	79000000	USD
CY2015	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	4997000000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	989000000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	1557000000	USD
CY2015	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-4986000000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-978000000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-1540000000	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
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	-17000000	USD
CY2015	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-6331000000	USD
CY2016Q1	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-57000000	USD
CY2016Q2	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-163000000	USD
CY2016Q3	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	128000000	USD
CY2016Q4	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-891000000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-983000000	USD
CY2017Q1	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-170000000	USD
CY2017Q2	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	99000000	USD
CY2017Q3	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	190000000	USD
CY2017Q4	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-1667000000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-1548000000	USD
CY2015	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	-19.14
CY2016	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	-2.51
CY2017	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	-4.30
CY2015	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	-105000000	USD
CY2016Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	104000000	USD
CY2016Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	-113000000	USD
CY2016Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	265000000	USD
CY2016Q4	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	-164000000	USD
CY2016	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	92000000	USD
CY2017Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	-34000000	USD
CY2017Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	-741000000	USD
CY2017Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	-27000000	USD
CY2017Q4	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	13000000	USD
CY2017	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	-789000000	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
CY2017	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	31000000	USD
CY2015	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-37000000	USD
CY2016	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-54000000	USD
CY2017	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-55000000	USD
CY2015	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1345000000	USD
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5000000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8000000	USD
CY2017Q4	us-gaap	Income Tax Receivable IncomeTaxReceivable	1000000	USD
CY2015	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	3023000000	USD
CY2016	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	398000000	USD
CY2017	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	482000000	USD
CY2015	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	-7000000	USD
CY2017	us-gaap	Increase Decrease In Notes Receivables IncreaseDecreaseInNotesReceivables	-17000000	USD
CY2016	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	-59000000	USD
CY2017	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	18000000	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
CY2017	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	2000000	USD
CY2015	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-1745000000	USD
CY2016	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-342000000	USD
CY2017	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-539000000	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
CY2017	us-gaap	Income Tax Reconciliation Nondeductible Expense Impairment Losses IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses	30000000	USD
CY2015	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	2000000	USD
CY2016	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	0	USD
CY2017	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	13000000	USD
CY2015	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-215000000	USD
CY2016	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	0	USD
CY2017	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	19000000	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
CY2017	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	0	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
CY2017	us-gaap	Income Tax Reconciliation Tax Credits Other IncomeTaxReconciliationTaxCreditsOther	20000000	USD
CY2015	us-gaap	Income Taxes Paid IncomeTaxesPaid	13000000	USD
CY2017	us-gaap	Income Taxes Paid IncomeTaxesPaid	11000000	USD
CY2015	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	12000000	USD
CY2016	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	14000000	USD
CY2017	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	9000000	USD
CY2015	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-180000000	USD
CY2016	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-39000000	USD
CY2017	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	77000000	USD
CY2015	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-113000000	USD
CY2016	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	7000000	USD
CY2017	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	99000000	USD
CY2015	us-gaap	Increase Decrease In Derivative Assets And Liabilities IncreaseDecreaseInDerivativeAssetsAndLiabilities	-235000000	USD
CY2016	us-gaap	Increase Decrease In Derivative Assets And Liabilities IncreaseDecreaseInDerivativeAssetsAndLiabilities	-32000000	USD
CY2017	us-gaap	Increase Decrease In Derivative Assets And Liabilities IncreaseDecreaseInDerivativeAssetsAndLiabilities	171000000	USD
CY2015	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	1326000000	USD
CY2016	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	-43000000	USD
CY2017	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	91000000	USD
CY2015	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	59000000	USD
CY2016	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-71000000	USD
CY2017	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-143000000	USD
CY2015	us-gaap	Increase Decrease In Notes Receivables IncreaseDecreaseInNotesReceivables	-18000000	USD
CY2016	us-gaap	Increase Decrease In Notes Receivables IncreaseDecreaseInNotesReceivables	-17000000	USD
CY2017	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	143000000	USD
CY2015	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	216000000	USD
CY2016	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	11000000	USD
CY2015	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	40000000	USD
CY2016	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-43000000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	216000000	USD
CY2015	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	21000000	USD
CY2016	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	44000000	USD
CY2017	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-12000000	USD
CY2015	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	25000000	USD
CY2016	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	30000000	USD
CY2017	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	34000000	USD
CY2015	us-gaap	Interest Expense InterestExpense	937000000	USD
CY2016	us-gaap	Interest Expense InterestExpense	895000000	USD
CY2017	us-gaap	Interest Expense InterestExpense	890000000	USD
CY2015	us-gaap	Interest Paid Net InterestPaidNet	924000000	USD
CY2016	us-gaap	Interest Paid Net InterestPaidNet	890000000	USD
CY2017	us-gaap	Interest Paid Net InterestPaidNet	868000000	USD
CY2016Q4	us-gaap	Interest Payable Current InterestPayableCurrent	180000000	USD
CY2017Q4	us-gaap	Interest Payable Current InterestPayableCurrent	156000000	USD
CY2016Q4	us-gaap	Inventory Net InventoryNet	721000000	USD
CY2017Q4	us-gaap	Inventory Net InventoryNet	532000000	USD
CY2017	us-gaap	Inventory Write Down InventoryWriteDown	33000000	USD
CY2016Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	0	USD
CY2017Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	0	USD
CY2016Q4	us-gaap	Liabilities Liabilities	26190000000	USD
CY2017Q4	us-gaap	Liabilities Liabilities	21272000000	USD
CY2016Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	30682000000	USD
CY2017Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	23318000000	USD
CY2016Q4	us-gaap	Liabilities Current LiabilitiesCurrent	4702000000	USD
CY2017Q4	us-gaap	Liabilities Current LiabilitiesCurrent	3317000000	USD
CY2016Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	21488000000	USD
CY2017Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	17955000000	USD
CY2016Q4	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation Current LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent	1210000000	USD
CY2017Q4	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation Current LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent	0	USD
CY2016Q4	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation Noncurrent LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationNoncurrent	11000000	USD
CY2017Q4	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation Noncurrent LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationNoncurrent	8000000	USD
CY2016Q4	us-gaap	Liability For Uncertain Tax Positions Noncurrent LiabilityForUncertainTaxPositionsNoncurrent	37000000	USD
CY2017Q4	us-gaap	Liability For Uncertain Tax Positions Noncurrent LiabilityForUncertainTaxPositionsNoncurrent	33000000	USD
CY2016Q4	us-gaap	Long Term Debt LongTermDebt	16704000000	USD
CY2017Q4	us-gaap	Long Term Debt LongTermDebt	16633000000	USD
CY2016Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	15957000000	USD
CY2017Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	15716000000	USD
CY2016Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	516000000	USD
CY2017Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	688000000	USD
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	11745000000	USD
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	695000000	USD
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	1854000000	USD
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	606000000	USD
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	805000000	USD
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	933000000	USD
CY2015	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	309000000	USD
CY2016	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	247000000	USD
CY2017	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	184000000	USD
CY2016Q4	us-gaap	Minority Interest MinorityInterest	2405000000	USD
CY2017Q4	us-gaap	Minority Interest MinorityInterest	2314000000	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
CY2017	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	65000000	USD
CY2016	us-gaap	Minority Interest Decrease From Redemptions MinorityInterestDecreaseFromRedemptions	7000000	USD
CY2015	us-gaap	Net Cash Provided By Used In Discontinued Operations NetCashProvidedByUsedInDiscontinuedOperations	-252000000	USD
CY2016	us-gaap	Net Cash Provided By Used In Discontinued Operations NetCashProvidedByUsedInDiscontinuedOperations	318000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Discontinued Operations NetCashProvidedByUsedInDiscontinuedOperations	-315000000	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	-915000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-485000000	USD
CY2015	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-377000000	USD
CY2016	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-1055000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-261000000	USD
CY2015	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1528000000	USD
CY2016	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-792000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1066000000	USD
CY2015	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-1269000000	USD
CY2016	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-1089000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-1013000000	USD
CY2015	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1349000000	USD
CY2016	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	2088000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1387000000	USD
CY2015	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	1287000000	USD
CY2016	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	2207000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	1425000000	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
CY2017Q1	us-gaap	Net Income Loss NetIncomeLoss	-163000000	USD
CY2017Q2	us-gaap	Net Income Loss NetIncomeLoss	-626000000	USD
CY2017Q3	us-gaap	Net Income Loss NetIncomeLoss	171000000	USD
CY2017Q4	us-gaap	Net Income Loss NetIncomeLoss	-1535000000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	-2153000000	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
CY2017Q4	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-120000000	USD
CY2017	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-184000000	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
CY2017Q1	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-40000000	USD
CY2017Q2	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-16000000	USD
CY2017Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-8000000	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
CY2017	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	-72000000	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
CY2017Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-163000000	USD
CY2017Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-626000000	USD
CY2017Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	171000000	USD
CY2017Q4	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-1535000000	USD
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-2153000000	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
CY2017	us-gaap	Net Income Loss Including Portion Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest	-2251000000	USD
CY2017	us-gaap	New Accounting Pronouncement Or Change In Accounting Principle Effect Of Adoption Quantification NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification	-257000000	USD
CY2015	us-gaap	Noncontrolling Interest Increase From Subsidiary Equity Issuance NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance	599000000	USD
CY2015	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-935000000	USD
CY2016	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-1244000000	USD
CY2017	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-953000000	USD
CY2016Q4	us-gaap	Notes And Loans Receivable Net Current NotesAndLoansReceivableNetCurrent	18000000	USD
CY2017Q4	us-gaap	Notes And Loans Receivable Net Current NotesAndLoansReceivableNetCurrent	14000000	USD
CY2016Q4	us-gaap	Notes And Loans Receivable Net Noncurrent NotesAndLoansReceivableNetNoncurrent	16000000	USD
CY2017Q4	us-gaap	Notes And Loans Receivable Net Noncurrent NotesAndLoansReceivableNetNoncurrent	2000000	USD
CY2016Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	34000000	USD
CY2017Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	16000000	USD
CY2016Q4	us-gaap	Off Market Lease Unfavorable OffMarketLeaseUnfavorable	230000000	USD
CY2017Q4	us-gaap	Off Market Lease Unfavorable OffMarketLeaseUnfavorable	207000000	USD
CY2015	us-gaap	Operating Income Loss OperatingIncomeLoss	-4051000000	USD
CY2016Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	331000000	USD
CY2016Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	164000000	USD
CY2016Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	429000000	USD
CY2016Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	-658000000	USD
CY2016	us-gaap	Operating Income Loss OperatingIncomeLoss	266000000	USD
CY2017Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	39000000	USD
CY2017Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	343000000	USD
CY2017Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	376000000	USD
CY2017Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	-1345000000	USD
CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	-587000000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due Future Minimum Sublease Rentals OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentals	49000000	USD
CY2015	us-gaap	Operating Leases Income Statement Contingent Revenue OperatingLeasesIncomeStatementContingentRevenue	753000000	USD
CY2016	us-gaap	Operating Leases Income Statement Contingent Revenue OperatingLeasesIncomeStatementContingentRevenue	912000000	USD
CY2017	us-gaap	Operating Leases Income Statement Contingent Revenue OperatingLeasesIncomeStatementContingentRevenue	879000000	USD
CY2016Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	810000000	USD
CY2017Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	734000000	USD
CY2016	us-gaap	Other Asset Impairment Charges OtherAssetImpairmentCharges	48000000	USD
CY2016Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	841000000	USD
CY2017Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	629000000	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
CY2017	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	-21000000	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
CY2017	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-8000000	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
CY2017	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	10000000	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
CY2017	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	13000000	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
CY2017	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax	1000000	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
CY2017	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	12000000	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
CY2017	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	-2000000	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
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	63000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-10000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-3000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-46000000	USD
CY2016Q4	us-gaap	Other Inventories Spare Parts OtherInventoriesSpareParts	332000000	USD
CY2017Q4	us-gaap	Other Inventories Spare Parts OtherInventoriesSpareParts	292000000	USD
CY2016Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	666000000	USD
CY2017Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	664000000	USD
CY2015	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	26000000	USD
CY2016	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	34000000	USD
CY2017	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	38000000	USD
CY2015	us-gaap	Payments For Advance To Affiliate PaymentsForAdvanceToAffiliate	0	USD
CY2016	us-gaap	Payments For Advance To Affiliate PaymentsForAdvanceToAffiliate	0	USD
CY2017	us-gaap	Payments For Advance To Affiliate PaymentsForAdvanceToAffiliate	125000000	USD
CY2015	us-gaap	Payments For Proceeds From Hedge Financing Activities PaymentsForProceedsFromHedgeFinancingActivities	-14000000	USD
CY2016	us-gaap	Payments For Proceeds From Hedge Financing Activities PaymentsForProceedsFromHedgeFinancingActivities	-6000000	USD
CY2017	us-gaap	Payments For Proceeds From Hedge Financing Activities PaymentsForProceedsFromHedgeFinancingActivities	-2000000	USD
CY2015	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-16000000	USD
CY2016	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-35000000	USD
CY2017	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-12000000	USD
CY2015	us-gaap	Payments For Proceeds From Productive Assets PaymentsForProceedsFromProductiveAssets	-27000000	USD
CY2016	us-gaap	Payments For Proceeds From Productive Assets PaymentsForProceedsFromProductiveAssets	-73000000	USD
CY2017	us-gaap	Payments For Proceeds From Productive Assets PaymentsForProceedsFromProductiveAssets	-87000000	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
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2015	us-gaap	Payments For Repurchase Of Preferred Stock And Preference Stock PaymentsForRepurchaseOfPreferredStockAndPreferenceStock	437000000	USD
CY2016	us-gaap	Payments For Repurchase Of Preferred Stock And Preference Stock PaymentsForRepurchaseOfPreferredStockAndPreferenceStock	226000000	USD
CY2015	us-gaap	Payments For Repurchase Of Redeemable Preferred Stock PaymentsForRepurchaseOfRedeemablePreferredStock	0	USD
CY2016	us-gaap	Payments For Repurchase Of Redeemable Preferred Stock PaymentsForRepurchaseOfRedeemablePreferredStock	226000000	USD
CY2017	us-gaap	Payments For Repurchase Of Redeemable Preferred Stock PaymentsForRepurchaseOfRedeemablePreferredStock	0	USD
CY2015	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	0	USD
CY2016	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	121000000	USD
CY2017	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	42000000	USD
CY2015	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	21000000	USD
CY2016	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	89000000	USD
CY2017	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	63000000	USD
CY2015	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	201000000	USD
CY2016	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	76000000	USD
CY2017	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	38000000	USD
CY2015	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	201000000	USD
CY2016	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	76000000	USD
CY2017	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	38000000	USD
CY2017	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	2000000	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
CY2017	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	5000000	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
CY2017	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	512000000	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
CY2017	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
CY2017	us-gaap	Payments To Acquire Business Two Net Of Cash Acquired PaymentsToAcquireBusinessTwoNetOfCashAcquired	0	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
CY2017	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	-66000000	USD
CY2015	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1029000000	USD
CY2017	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	41000000	USD
CY2015	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	-41000000	USD
CY2016	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	1000000	USD
CY2016	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	976000000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1111000000	USD
CY2016Q4	us-gaap	Pension And Other Postretirement And Postemployment Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementAndPostemploymentBenefitPlansLiabilitiesNoncurrent	510000000	USD
CY2017Q4	us-gaap	Pension And Other Postretirement And Postemployment Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementAndPostemploymentBenefitPlansLiabilitiesNoncurrent	458000000	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
CY2015	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	20000000	USD
CY2016	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	5000000	USD
CY2017	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	0	USD
CY2016Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	404000000	USD
CY2017Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	261000000	USD
CY2015	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	1000000	USD
CY2017	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	2000000	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
CY2017	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	-2000000	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
CY2017	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	2270000000	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
CY2017	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-10000000	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
CY2017	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	95000000	USD
CY2015	us-gaap	Proceeds From Repayments Of Debt ProceedsFromRepaymentsOfDebt	-1362000000	USD
CY2016	us-gaap	Proceeds From Repayments Of Debt ProceedsFromRepaymentsOfDebt	-5908000000	USD
CY2017	us-gaap	Proceeds From Repayments Of Debt ProceedsFromRepaymentsOfDebt	-2348000000	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
CY2017	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	501000000	USD
CY2015	us-gaap	Proceeds From Sale Of Intangible Assets ProceedsFromSaleOfIntangibleAssets	41000000	USD
CY2017	us-gaap	Proceeds From Sale Of Intangible Assets ProceedsFromSaleOfIntangibleAssets	66000000	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
CY2017Q1	us-gaap	Profit Loss ProfitLoss	-203000000	USD
CY2017Q2	us-gaap	Profit Loss ProfitLoss	-642000000	USD
CY2017Q3	us-gaap	Profit Loss ProfitLoss	163000000	USD
CY2017Q4	us-gaap	Profit Loss ProfitLoss	-1655000000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	-2337000000	USD
CY2016Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	20705000000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	18373000000	USD
CY2016Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	15369000000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	13908000000	USD
CY2015	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	64000000	USD
CY2016	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	48000000	USD
CY2017	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	68000000	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
CY2017Q4	us-gaap	Redeemable Noncontrolling Interest Equity Other Carrying Amount RedeemableNoncontrollingInterestEquityOtherCarryingAmount	78000000	USD
CY2017Q4	us-gaap	Related Party Transaction Other Revenues From Transactions With Related Party RelatedPartyTransactionOtherRevenuesFromTransactionsWithRelatedParty	84000000	USD
CY2015	us-gaap	Related Party Transaction Other Revenues From Transactions With Related Party RelatedPartyTransactionOtherRevenuesFromTransactionsWithRelatedParty	193000000	USD
CY2016	us-gaap	Related Party Transaction Other Revenues From Transactions With Related Party RelatedPartyTransactionOtherRevenuesFromTransactionsWithRelatedParty	193000000	USD
CY2017	us-gaap	Related Party Transaction Other Revenues From Transactions With Related Party RelatedPartyTransactionOtherRevenuesFromTransactionsWithRelatedParty	87000000	USD
CY2015	us-gaap	Reorganization Items ReorganizationItems	0	USD
CY2016	us-gaap	Reorganization Items ReorganizationItems	0	USD
CY2017	us-gaap	Reorganization Items ReorganizationItems	44000000	USD
CY2015	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	154000000	USD
CY2016	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	89000000	USD
CY2017	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	67000000	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
CY2017Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	508000000	USD
CY2016Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-3787000000	USD
CY2017Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-6268000000	USD
CY2016Q4	us-gaap	Retained Earnings Undistributed Earnings From Equity Method Investees RetainedEarningsUndistributedEarningsFromEquityMethodInvestees	101000000	USD
CY2017Q4	us-gaap	Retained Earnings Undistributed Earnings From Equity Method Investees RetainedEarningsUndistributedEarningsFromEquityMethodInvestees	120000000	USD
CY2015	us-gaap	Revenue From Related Parties RevenueFromRelatedParties	8000000	USD
CY2016	us-gaap	Revenue From Related Parties RevenueFromRelatedParties	7000000	USD
CY2017	us-gaap	Revenue From Related Parties RevenueFromRelatedParties	8000000	USD
CY2015	us-gaap	Revenues Revenues	12328000000	USD
CY2016Q1	us-gaap	Revenues Revenues	2659000000	USD
CY2016Q2	us-gaap	Revenues Revenues	2248000000	USD
CY2016Q3	us-gaap	Revenues Revenues	3421000000	USD
CY2016Q4	us-gaap	Revenues Revenues	2184000000	USD
CY2016	us-gaap	Revenues Revenues	10512000000	USD
CY2017Q1	us-gaap	Revenues Revenues	2382000000	USD
CY2017Q2	us-gaap	Revenues Revenues	2701000000	USD
CY2017Q3	us-gaap	Revenues Revenues	3049000000	USD
CY2017Q4	us-gaap	Revenues Revenues	2497000000	USD
CY2017	us-gaap	Revenues Revenues	10629000000	USD
CY2015	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	1228000000	USD
CY2016	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	1095000000	USD
CY2017	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	907000000	USD
CY2017	us-gaap	Severance Costs1 SeveranceCosts1	44000000	USD
CY2015	us-gaap	Share Based Compensation ShareBasedCompensation	39000000	USD
CY2016	us-gaap	Share Based Compensation ShareBasedCompensation	10000000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	35000000	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
CY2017	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	6000000	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
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1968000000	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
CY2017Q4	us-gaap	Temporary Equity Carrying Amount Attributable To Parent TemporaryEquityCarryingAmountAttributableToParent	0	USD
CY2016Q2	us-gaap	Temporary Equity Liquidation Preference TemporaryEquityLiquidationPreference	344500000	USD
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
CY2017Q4	us-gaap	Temporary Equity Shares Authorized TemporaryEquitySharesAuthorized	10000000	shares
CY2016Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	102140814	shares
CY2017Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	101580045	shares
CY2016Q4	us-gaap	Treasury Stock Value TreasuryStockValue	2399000000	USD
CY2017Q4	us-gaap	Treasury Stock Value TreasuryStockValue	2386000000	USD
CY2015	us-gaap	Treasury Stock Value Acquired Par Value Method TreasuryStockValueAcquiredParValueMethod	437000000	USD
CY2015Q4	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	307000000	USD
CY2016Q4	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	321000000	USD
CY2017Q4	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	376000000	USD
CY2015	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-269000000	USD
CY2016	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-106000000	USD
CY2017	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	182000000	USD
CY2015Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	32000000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	34000000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	30000000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2017	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	8000000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	6000000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	4000000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	3000000	USD
CY2015	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	-3000000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	1000000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	0	USD
CY2017	us-gaap	Unrecognized Tax Benefits Income Tax Penalties Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesExpense	1000000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	8000000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	4000000	USD
CY2017Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On Fifth Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary	10000000	USD
CY2017Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On First Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary	21000000	USD
CY2017Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On Fourth Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary	11000000	USD
CY2017Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On Second Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary	14000000	USD
CY2017Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On Third Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary	12000000	USD
CY2017Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance Sheet Amount UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount	68000000	USD
CY2017Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Due After Five Years UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears	0	USD
CY2016Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	10000000	USD
CY2016Q4	us-gaap	Variable Interest Entity Consolidated Carrying Amount Assets VariableInterestEntityConsolidatedCarryingAmountAssets	2575000000	USD
CY2017Q4	us-gaap	Variable Interest Entity Consolidated Carrying Amount Assets VariableInterestEntityConsolidatedCarryingAmountAssets	3113000000	USD
CY2016Q4	us-gaap	Variable Interest Entity Consolidated Carrying Amount Assets And Liabilities Net VariableInterestEntityConsolidatedCarryingAmountAssetsAndLiabilitiesNet	1316000000	USD
CY2017Q4	us-gaap	Variable Interest Entity Consolidated Carrying Amount Assets And Liabilities Net VariableInterestEntityConsolidatedCarryingAmountAssetsAndLiabilitiesNet	1562000000	USD
CY2016Q4	us-gaap	Variable Interest Entity Consolidated Carrying Amount Liabilities VariableInterestEntityConsolidatedCarryingAmountLiabilities	684000000	USD
CY2017Q4	us-gaap	Variable Interest Entity Consolidated Carrying Amount Liabilities VariableInterestEntityConsolidatedCarryingAmountLiabilities	966000000	USD
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
CY2017Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	316000000	shares
CY2017Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	316000000	shares
CY2017Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	322000000	shares
CY2017Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	317000000	shares
CY2015	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	329000000	shares
CY2016	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	316000000	shares
CY2017	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	317000000	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
CY2017Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	316000000	shares
CY2017Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	316000000	shares
CY2017Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	317000000	shares
CY2017Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	317000000	shares
CY2017	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>
CY2017	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-style:italic;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 a 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;">30,000</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 Chapter 11 Cases</font></div><div style="line-height:120%;text-align:justify;text-indent:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">On June 14, 2017, or the Petition Date, GenOn, along with GenOn Americas Generation and certain of their directly and indirectly-owned subsidiaries, or collectively the GenOn Entities, filed voluntary petitions for relief under Chapter 11, or the Chapter 11 Cases, of the U.S. Bankruptcy Code, or the Bankruptcy Code, in the U.S. Bankruptcy Court for the Southern District of Texas, Houston Division, or the Bankruptcy Court. GenOn Mid-Atlantic, as well as its consolidated subsidiaries, REMA and certain other subsidiaries, did not file for relief under Chapter 11.</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%;text-align:justify;text-indent:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">As a result of the bankruptcy filings and beginning on June 14, 2017, GenOn and its subsidiaries were deconsolidated from NRG’s consolidated financial statements. NRG recorded its investment in GenOn under the cost method with an estimated fair value of </font><font style="font-family:inherit;font-size:10pt;">zero</font><font style="font-family:inherit;font-size:10pt;">. NRG determined that this disposal of GenOn and its subsidiaries is a discontinued operation; and, accordingly, the financial information for all historical periods has been recast to reflect GenOn as a discontinued operation. In connection with the disposal, NRG recorded a loss on deconsolidation of </font><font style="font-family:inherit;font-size:10pt;">$208 million</font><font style="font-family:inherit;font-size:10pt;"> during the quarter ended June 30, 2017. See </font><font style="font-family:inherit;font-size:10pt;">Note 3</font><font style="font-family:inherit;font-size:10pt;">, </font><font style="font-family:inherit;font-size:10pt;font-style:italic;">Discontinued Operations, Acquisitions and Dispositions</font><font style="font-family:inherit;font-size:10pt;">, for more information. </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%;text-align:justify;text-indent:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Prior to the GenOn Entities' filing the Chapter 11 Cases, on June 12, 2017, NRG entered into a restructuring support and lock-up agreement, or the Restructuring Support Agreement, with the GenOn Entities and certain holders of the GenOn and GenOn Americas Generation Senior Notes, that provides for a restructuring and recapitalization of the GenOn Entities through a prearranged plan of reorganization. On December 12, 2017, the Bankruptcy Court entered an order confirming the plan of reorganization. There is no assurance that the GenOn Entities' plan will be successfully implemented. The principal terms of the Restructuring Support Agreement and further information regarding the Chapter 11 Cases are described further in </font><font style="font-family:inherit;font-size:10pt;">Note 3</font><font style="font-family:inherit;font-size:10pt;font-style:italic;">, </font><font style="font-family:inherit;font-size:10pt;font-style:italic;">Discontinued Operations, Acquisitions and Dispositions</font><font style="font-family:inherit;font-size:10pt;font-style:italic;">.</font></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:justify;text-indent: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;">Transformation Plan</font></div><div style="line-height:120%;padding-bottom:12px;text-align:justify;text-indent:28px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">On July 12, 2017, NRG announced its Transformation Plan designed to significantly strengthen earnings and cost competitiveness, lower risk and volatility, and create significant shareholder value. The three-part, </font><font style="font-family:inherit;font-size:10pt;">three</font><font style="font-family:inherit;font-size:10pt;">-year plan is comprised of the following targets: </font></div><div style="line-height:120%;padding-bottom:12px;text-align:justify;padding-left:30px;font-size:11pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;">Operations and cost excellence </font><font style="font-family:inherit;font-size:10pt;">— Cost savings and margin enhancement of </font><font style="font-family:inherit;font-size:10pt;">$1,065 million</font><font style="font-family:inherit;font-size:10pt;"> recurring, which consists of </font><font style="font-family:inherit;font-size:10pt;">$590 million</font><font style="font-family:inherit;font-size:10pt;"> of annual cost savings, a </font><font style="font-family:inherit;font-size:10pt;">$215 million</font><font style="font-family:inherit;font-size:10pt;"> net margin enhancement program, </font><font style="font-family:inherit;font-size:10pt;">$50 million</font><font style="font-family:inherit;font-size:10pt;"> annual reduction in maintenance capital expenditures, and </font><font style="font-family:inherit;font-size:10pt;">$210 million</font><font style="font-family:inherit;font-size:10pt;"> in permanent selling, general and administrative expense reduction associated with asset sales.</font><font style="font-family:inherit;font-size:11pt;"> </font></div><div style="line-height:120%;text-align:justify;padding-left:29px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;">Portfolio optimization</font><font style="font-family:inherit;font-size:10pt;"> — Targeting up to </font><font style="font-family:inherit;font-size:10pt;">$3.2 billion</font><font style="font-family:inherit;font-size:10pt;"> of asset sale net cash proceeds, including divestitures of </font><font style="font-family:inherit;font-size:10pt;">6</font><font style="font-family:inherit;font-size:10pt;"> GWs of conventional generation and businesses (excluding GenOn) and the expected monetization of </font><font style="font-family:inherit;font-size:10pt;">100%</font><font style="font-family:inherit;font-size:10pt;"> of its interest in NRG Yield, Inc. and its renewables platform. </font></div><div style="line-height:120%;text-align:justify;padding-left:29px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:justify;padding-left:29px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;">Capital structure and allocation enhancements</font><font style="font-family:inherit;font-size:10pt;"> — A prioritized capital allocation strategy that targets a reduction in consolidated debt from approximately </font><font style="font-family:inherit;font-size:10pt;">$19.5 billion</font><font style="font-family:inherit;font-size:10pt;"> (</font><font style="font-family:inherit;font-size:10pt;">$18 billion</font><font style="font-family:inherit;font-size:10pt;"> net debt) to approximately </font><font style="font-family:inherit;font-size:10pt;">$6.5 billion</font><font style="font-family:inherit;font-size:10pt;"> (</font><font style="font-family:inherit;font-size:10pt;">$6 billion</font><font style="font-family:inherit;font-size:10pt;"> net debt). Following the completion of the contemplated asset sales, the Company expects </font><font style="font-family:inherit;font-size:10pt;">$5.3 billion</font><font style="font-family:inherit;font-size:10pt;"> in excess cash to be available for allocation through 2020, after achieving its targeted </font><font style="font-family:inherit;font-size:10pt;">3.0</font><font style="font-family:inherit;font-size:10pt;">x net debt / Adjusted EBITDA corporate credit ratio. </font></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:justify;text-indent:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The Company expects to fully implement the Transformation Plan by the end of 2020 with significant completion by the end of 2018. The Company expects to realize (i) </font><font style="font-family:inherit;font-size:10pt;">$370 million</font><font style="font-family:inherit;font-size:10pt;"> of working capital improvements through 2020 and (ii) approximately </font><font style="font-family:inherit;font-size:10pt;">$290 million</font><font style="font-family:inherit;font-size:10pt;">, one-time costs to achieve. </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:13px;text-align:justify;text-indent:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;"></font><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, 2017</font><font style="font-family:inherit;font-size:10pt;">:</font></div><div style="line-height:120%;text-align:justify;text-indent:30px;font-size:10pt;"><img src="yieldorgpicturerevisedasog03.jpg" alt="yieldorgpicturerevisedasog03.jpg" style="height:539px;width:682px;"></img><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></div>
CY2017	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:left;padding-left:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;"></font></div></div>
CY2017	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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2017 Q4 Form 10-K Financial Statement

#000101387118000011 Filed on March 01, 2018

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$NRG NRG ENERGY, INC. Stock $nrg

2017 Q4 Form 10-K Financial Statement

#000101387118000011 Filed on March 01, 2018

Income Statement

Balance Sheet

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Facts In Submission

Files In Submission

$NRG
NRG ENERGY, INC. Stock $nrg