$NRG
NRG Energy Inc Stock $nrg

$nrg Overview Financials Valuation SEC Filings Company Website

2023 Q1 Form 10-K Financial Statement

#000101387123000004 Filed on February 23, 2023

Income Statement

Concept	2023 Q1	2022 Q4	2022
Revenue	$7.722B	$7.855B	$31.54B
YoY Change	-2.2%	11.48%	16.87%
Cost Of Revenue	$8.778B	$8.827B	$27.45B
YoY Change	78.05%	26.35%	34.0%
Gross Profit	-$1.056B	-$972.0M	$4.097B
YoY Change	-135.6%	-1720.0%	-37.04%
Gross Profit Margin	-13.68%	-12.37%	12.99%
Selling, General & Admin	$426.0M	$163.0M	$1.228B
YoY Change	32.3%	-46.2%	-5.03%
% of Gross Profit			29.97%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$190.0M	$197.0M	$634.0M
YoY Change	3.83%	-11.66%	-19.24%
% of Gross Profit			15.47%
Operating Expenses	$426.0M	$312.0M	$1.228B
YoY Change	32.3%	-39.88%	-5.03%
Operating Profit	-$1.544B	-$1.284B	$2.018B
YoY Change	-163.67%	179.74%	-39.6%
Interest Expense	$148.0M	-$98.00M	$417.0M
YoY Change	43.69%	-16.24%	-14.02%
% of Operating Profit			20.66%
Other Income/Expense, Net	-$127.0M	$23.00M	-$355.0M
YoY Change	7.63%	9.52%	-26.35%
Pretax Income	-$1.671B	-$1.392B	$1.663B
YoY Change	-172.43%	133.95%	-41.83%
Income Tax	-$336.0M	-$297.0M	$442.0M
% Of Pretax Income			26.58%
Net Earnings	-$1.335B	-$1.095B	$1.221B
YoY Change	-176.9%	156.44%	-44.17%
Net Earnings / Revenue	-17.29%	-13.94%	3.87%
Basic Earnings Per Share	-$5.82		$5.17
Diluted Earnings Per Share	-$5.82	-$4.76	$5.17
COMMON SHARES
Basic Shares Outstanding	229.8M shares	230.4M shares	236.0M shares
Diluted Shares Outstanding	230.0M shares		236.0M shares

Balance Sheet

Concept	2023 Q1	2022 Q4	2022
SHORT-TERM ASSETS
Cash & Short-Term Investments	$407.0M	$430.0M	$430.0M
YoY Change	5.17%	72.0%	72.0%
Cash & Equivalents	$407.0M	$430.0M	$430.0M
Short-Term Investments
Other Short-Term Assets	$5.560B	$10.28B	$10.28B
YoY Change	-56.58%	50.07%	50.07%
Inventory	$722.0M	$751.0M	$751.0M
Prepaid Expenses
Receivables	$3.519B	$4.773B	$4.773B
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$10.21B	$16.23B	$16.23B
YoY Change	-39.37%	49.72%	49.72%
LONG-TERM ASSETS
Property, Plant & Equipment	$2.082B	$1.917B	$1.917B
YoY Change	9.64%	-2.14%	-2.14%
Goodwill	$5.343B	$1.650B
YoY Change	197.49%	-8.33%
Intangibles
YoY Change
Long-Term Investments	$136.0M	$133.0M	$133.0M
YoY Change	-9.93%	-15.29%	-15.29%
Other Assets	$354.0M	$256.0M	$7.083B
YoY Change	38.82%	11.79%	19.67%
Total Long-Term Assets	$19.49B	$12.92B	$12.92B
YoY Change	54.18%	4.65%	4.65%
TOTAL ASSETS
Total Short-Term Assets	$10.21B	$16.23B	$16.23B
Total Long-Term Assets	$19.49B	$12.92B	$12.92B
Total Assets	$29.70B	$29.15B	$29.15B
YoY Change	0.74%	25.73%	25.73%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$2.330B	$3.643B	$3.643B
YoY Change	5.14%	60.2%	60.2%
Accrued Expenses	$1.657B	$1.373B	$1.373B
YoY Change	21.21%	-2.28%	-2.28%
Deferred Revenue	$688.0M	$176.0M
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$971.0M	$63.00M	$63.00M
YoY Change	24175.0%	1475.0%	1475.0%
Total Short-Term Liabilities	$10.33B	$12.98B	$12.98B
YoY Change	-15.59%	64.02%	64.02%
LONG-TERM LIABILITIES
Long-Term Debt	$11.33B	$7.976B	$7.976B
YoY Change	41.19%	0.13%	0.13%
Other Long-Term Liabilities	$1.030B	$983.0M	$4.226B
YoY Change	3.41%	-1.01%	16.48%
Total Long-Term Liabilities	$16.29B	$12.34B	$12.20B
YoY Change	33.37%	5.73%	5.24%
TOTAL LIABILITIES
Total Short-Term Liabilities	$10.33B	$12.98B	$12.98B
Total Long-Term Liabilities	$16.29B	$12.34B	$12.20B
Total Liabilities	$26.62B	$25.32B	$25.32B
YoY Change	8.87%	29.29%	29.29%
SHAREHOLDERS EQUITY
Retained Earnings	-$15.00M	$1.408B
YoY Change	-100.69%	203.45%
Common Stock	$8.485B	$8.461B
YoY Change	0.57%	-0.87%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$5.864B	$5.864B
YoY Change	7.4%	11.21%
Treasury Stock Shares		194.3M shares
Shareholders Equity	$3.080B	$3.828B	$3.828B
YoY Change
Total Liabilities & Shareholders Equity	$29.70B	$29.15B	$29.15B
YoY Change	0.74%	25.73%	25.73%

Cashflow Statement

Concept	2023 Q1	2022 Q4	2022
OPERATING ACTIVITIES
Net Income	-$1.335B	-$1.095B	$1.221B
YoY Change	-176.9%	156.44%	-44.17%
Depreciation, Depletion And Amortization	$190.0M	$197.0M	$634.0M
YoY Change	3.83%	-11.66%	-19.24%
Cash From Operating Activities	-$1.598B	-$1.398B	$360.0M
YoY Change	-195.35%	2.64%	-26.98%
INVESTING ACTIVITIES
Capital Expenditures	$142.0M	$117.0M	$367.0M
YoY Change	136.67%	-334.0%	36.43%
Acquisitions	$2.492B
YoY Change	9484.62%
Other Investing Activities	-$2.208B	-$10.00M	$35.00M
YoY Change	10940.0%	-101.68%
Cash From Investing Activities	-$2.350B	-$127.0M	-$332.0M
YoY Change	2837.5%	-123.26%	-89.08%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net			$606.0M
YoY Change			1189.36%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	$2.536B	188.0M	$1.043B
YoY Change	783.62%	-297.89%	-483.46%
NET CHANGE
Cash From Operating Activities	-$1.598B	-1.398B	$360.0M
Cash From Investing Activities	-$2.350B	-127.0M	-$332.0M
Cash From Financing Activities	$2.536B	188.0M	$1.043B
Net Change In Cash	-$1.409B	-1.337B	$1.068B
YoY Change	-174.71%	46.76%	-137.87%
FREE CASH FLOW
Cash From Operating Activities	-$1.598B	-$1.398B	$360.0M
Capital Expenditures	$142.0M	$117.0M	$367.0M
Free Cash Flow	-$1.740B	-$1.515B	-$7.000M
YoY Change	-207.67%	15.47%	-103.13%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2022	dei	Entity Central Index Key EntityCentralIndexKey	0001013871
CY2022	dei	Amendment Flag AmendmentFlag	false
CY2022	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2022
CY2022	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
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CY2022Q4	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P1Y
CY2022Q4	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P1Y
CY2022	nrg	Estimated Counterparty Credit Risk Exposure To Certain Counterparties Period EstimatedCounterpartyCreditRiskExposureToCertainCounterpartiesPeriod	P5Y
CY2022Q4	us-gaap	Finance Lease Liability Statement Of Financial Position Extensible List FinanceLeaseLiabilityStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2022#LongTermDebtAndCapitalLeaseObligations
CY2021Q4	us-gaap	Finance Lease Liability Statement Of Financial Position Extensible List FinanceLeaseLiabilityStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2022#LongTermDebtAndCapitalLeaseObligations
CY2022	nrg	Periodofretrospectivepremiumadjustments Periodofretrospectivepremiumadjustments	P24M
CY2022	nrg	Insurance Coverage For Lost Revenue Waiting Period InsuranceCoverageForLostRevenueWaitingPeriod	P56D
CY2022	dei	Document Type DocumentType	10-K
CY2022	dei	Document Annual Report DocumentAnnualReport	true
CY2022	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2022	dei	Document Period End Date DocumentPeriodEndDate	2022-12-31
CY2022	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2022	dei	Document Transition Report DocumentTransitionReport	false
CY2022	dei	Entity File Number EntityFileNumber	001-15891
CY2022	dei	Entity Registrant Name EntityRegistrantName	NRG Energy, Inc
CY2022	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2022	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	41-1724239
CY2022	dei	Entity Address Address Line1 EntityAddressAddressLine1	910 Louisiana Street
CY2022	dei	Entity Address City Or Town EntityAddressCityOrTown	Houston
CY2022	dei	Entity Address State Or Province EntityAddressStateOrProvince	TX
CY2022	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	77002
CY2022	dei	City Area Code CityAreaCode	713
CY2022	dei	Local Phone Number LocalPhoneNumber	537-3000
CY2022	dei	Security12b Title Security12bTitle	Common Stock, par value $0.01
CY2022	dei	Trading Symbol TradingSymbol	NRG
CY2022	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2022	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2022	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2022	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2022	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2022	dei	Entity Small Business EntitySmallBusiness	false
CY2022	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
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CY2022	dei	Entity Shell Company EntityShellCompany	false
CY2022Q2	dei	Entity Public Float EntityPublicFloat	6461030777	usd
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CY2022	dei	Auditor Name AuditorName	KPMG LLP
CY2022	dei	Auditor Location AuditorLocation	Philadelphia, PA
CY2022	dei	Auditor Firm AuditorFirmId	185
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CY2022Q4	us-gaap	Goodwill Goodwill	1650000000	usd
CY2021Q4	us-gaap	Goodwill Goodwill	1795000000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	2132000000	usd
CY2021Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	2511000000	usd
CY2022Q4	us-gaap	Decommissioning Trust Assets Amount DecommissioningTrustAssetsAmount	838000000	usd
CY2021Q4	us-gaap	Decommissioning Trust Assets Amount DecommissioningTrustAssetsAmount	1008000000	usd
CY2022Q4	us-gaap	Derivative Instruments And Hedges Noncurrent DerivativeInstrumentsAndHedgesNoncurrent	4108000000	usd
CY2021Q4	us-gaap	Derivative Instruments And Hedges Noncurrent DerivativeInstrumentsAndHedgesNoncurrent	2527000000	usd
CY2022Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	1881000000	usd
CY2021Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	2155000000	usd
CY2022Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	256000000	usd
CY2021Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	229000000	usd
CY2022Q4	us-gaap	Regulated Entity Other Assets Noncurrent RegulatedEntityOtherAssetsNoncurrent	11223000000	usd
CY2021Q4	us-gaap	Regulated Entity Other Assets Noncurrent RegulatedEntityOtherAssetsNoncurrent	10653000000	usd
CY2022Q4	us-gaap	Assets Assets	29146000000	usd
CY2021Q4	us-gaap	Assets Assets	23182000000	usd
CY2022Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	63000000	usd
CY2021Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	4000000	usd
CY2022Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	83000000	usd
CY2021Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	81000000	usd
CY2022Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	3643000000	usd
CY2021Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	2274000000	usd
CY2022Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	6195000000	usd
CY2021Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	3387000000	usd
CY2022Q4	nrg	Derivative Asset Not Subject To Master Netting Arrangement Collateral Obligation To Return Cash Not Offset DerivativeAssetNotSubjectToMasterNettingArrangementCollateralObligationToReturnCashNotOffset	1708000000	usd
CY2021Q4	nrg	Derivative Asset Not Subject To Master Netting Arrangement Collateral Obligation To Return Cash Not Offset DerivativeAssetNotSubjectToMasterNettingArrangementCollateralObligationToReturnCashNotOffset	845000000	usd
CY2022Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	1290000000	usd
CY2021Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	1324000000	usd
CY2022Q4	us-gaap	Liabilities Current LiabilitiesCurrent	12982000000	usd
CY2021Q4	us-gaap	Liabilities Current LiabilitiesCurrent	7915000000	usd
CY2022Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	7976000000	usd
CY2021Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	7966000000	usd
CY2022Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	180000000	usd
CY2021Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	236000000	usd
CY2022Q4	us-gaap	Decommissioning Liability Noncurrent DecommissioningLiabilityNoncurrent	340000000	usd
CY2021Q4	us-gaap	Decommissioning Liability Noncurrent DecommissioningLiabilityNoncurrent	321000000	usd
CY2022Q4	nrg	Nuclear Decommissioning Trust Fund Liability Noncurrent NuclearDecommissioningTrustFundLiabilityNoncurrent	477000000	usd
CY2021Q4	nrg	Nuclear Decommissioning Trust Fund Liability Noncurrent NuclearDecommissioningTrustFundLiabilityNoncurrent	666000000	usd
CY2022Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	2246000000	usd
CY2021Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	1412000000	usd
CY2022Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	134000000	usd
CY2021Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	73000000	usd
CY2022Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	983000000	usd
CY2021Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	993000000	usd
CY2022Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	12336000000	usd
CY2021Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	11667000000	usd
CY2022Q4	us-gaap	Liabilities Liabilities	25318000000	usd
CY2021Q4	us-gaap	Liabilities Liabilities	19582000000	usd
CY2022Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2021Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2022Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2021Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2021Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000	shares
CY2022Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000	shares
CY2022Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	423897001	shares
CY2021Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	423547174	shares
CY2022Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	229561030	shares
CY2021Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	243753899	shares
CY2022Q4	us-gaap	Common Stock Value CommonStockValue	4000000	usd
CY2021Q4	us-gaap	Common Stock Value CommonStockValue	4000000	usd
CY2022Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	8457000000	usd
CY2021Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	8531000000	usd
CY2022Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	1408000000	usd
CY2021Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	464000000	usd
CY2022Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	194335971	shares
CY2021Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	179793275	shares
CY2022Q4	us-gaap	Treasury Stock Value TreasuryStockValue	5864000000	usd
CY2021Q4	us-gaap	Treasury Stock Value TreasuryStockValue	5273000000	usd
CY2022Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-177000000	usd
CY2021Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-126000000	usd
CY2022Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3828000000	usd
CY2021Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3600000000	usd
CY2022Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	29146000000	usd
CY2021Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	23182000000	usd
CY2022	us-gaap	Profit Loss ProfitLoss	1221000000	usd
CY2021	us-gaap	Profit Loss ProfitLoss	2187000000	usd
CY2020	us-gaap	Profit Loss ProfitLoss	510000000	usd
CY2022	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-7000000	usd
CY2021	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-20000000	usd
CY2020	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-45000000	usd
CY2022	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	634000000	usd
CY2021	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	785000000	usd
CY2020	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	435000000	usd
CY2022	us-gaap	Accretion Expense Including Asset Retirement Obligations AccretionExpenseIncludingAssetRetirementObligations	55000000	usd
CY2021	us-gaap	Accretion Expense Including Asset Retirement Obligations AccretionExpenseIncludingAssetRetirementObligations	30000000	usd
CY2020	us-gaap	Accretion Expense Including Asset Retirement Obligations AccretionExpenseIncludingAssetRetirementObligations	45000000	usd
CY2022	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	11000000	usd
CY2021	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	698000000	usd
CY2020	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	108000000	usd
CY2022	nrg	Amortization Of Nuclear Fuel AmortizationOfNuclearFuel	54000000	usd
CY2021	nrg	Amortization Of Nuclear Fuel AmortizationOfNuclearFuel	51000000	usd
CY2020	nrg	Amortization Of Nuclear Fuel AmortizationOfNuclearFuel	54000000	usd
CY2022	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	23000000	usd
CY2021	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	39000000	usd
CY2020	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	48000000	usd
CY2022	nrg	Gains Losses On Extinguishment Of Debt Non Cash Portion GainsLossesOnExtinguishmentOfDebtNonCashPortion	0	usd
CY2021	nrg	Gains Losses On Extinguishment Of Debt Non Cash Portion GainsLossesOnExtinguishmentOfDebtNonCashPortion	-77000000	usd
CY2020	nrg	Gains Losses On Extinguishment Of Debt Non Cash Portion GainsLossesOnExtinguishmentOfDebtNonCashPortion	-9000000	usd
CY2022	nrg	Amortization Of Intangibles In The Money Contracts And Retirement Of Re Cs AmortizationOfIntangiblesInTheMoneyContractsAndRetirementOfRECs	158000000	usd
CY2021	nrg	Amortization Of Intangibles In The Money Contracts And Retirement Of Re Cs AmortizationOfIntangiblesInTheMoneyContractsAndRetirementOfRECs	106000000	usd
CY2020	nrg	Amortization Of Intangibles In The Money Contracts And Retirement Of Re Cs AmortizationOfIntangiblesInTheMoneyContractsAndRetirementOfRECs	70000000	usd
CY2022	us-gaap	Share Based Compensation ShareBasedCompensation	28000000	usd
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	21000000	usd
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	22000000	usd
CY2022	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	102000000	usd
CY2021	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	261000000	usd
CY2020	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	23000000	usd
CY2022	nrg	Asset Impairment Charges Including Equity Method Investments AssetImpairmentChargesIncludingEquityMethodInvestments	206000000	usd
CY2021	nrg	Asset Impairment Charges Including Equity Method Investments AssetImpairmentChargesIncludingEquityMethodInvestments	544000000	usd
CY2020	nrg	Asset Impairment Charges Including Equity Method Investments AssetImpairmentChargesIncludingEquityMethodInvestments	93000000	usd
CY2022	us-gaap	Increase Decrease In Derivative Assets And Liabilities IncreaseDecreaseInDerivativeAssetsAndLiabilities	3221000000	usd
CY2021	us-gaap	Increase Decrease In Derivative Assets And Liabilities IncreaseDecreaseInDerivativeAssetsAndLiabilities	3626000000	usd
CY2022	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	1560000000	usd
CY2021	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	1232000000	usd
CY2020	us-gaap	Increase Decrease In Derivative Assets And Liabilities IncreaseDecreaseInDerivativeAssetsAndLiabilities	-137000000	usd
CY2022	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	382000000	usd
CY2021	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	604000000	usd
CY2020	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	228000000	usd
CY2022	nrg	Changes In Collateral Deposits Supporting Energy Risk Management Activities ChangesInCollateralDepositsSupportingEnergyRiskManagementActivities	896000000	usd
CY2021	nrg	Changes In Collateral Deposits Supporting Energy Risk Management Activities ChangesInCollateralDepositsSupportingEnergyRiskManagementActivities	797000000	usd
CY2020	nrg	Changes In Collateral Deposits Supporting Energy Risk Management Activities ChangesInCollateralDepositsSupportingEnergyRiskManagementActivities	127000000	usd
CY2022	nrg	Changes In Nuclear Decommissioning Trust Liability ChangesInNuclearDecommissioningTrustLiability	9000000	usd
CY2021	nrg	Changes In Nuclear Decommissioning Trust Liability ChangesInNuclearDecommissioningTrustLiability	40000000	usd
CY2020	nrg	Changes In Nuclear Decommissioning Trust Liability ChangesInNuclearDecommissioningTrustLiability	51000000	usd
CY2022	nrg	Oil Inventory Lower Of Cost Or Market Adjustment OilInventoryLowerOfCostOrMarketAdjustment	0	usd
CY2021	nrg	Oil Inventory Lower Of Cost Or Market Adjustment OilInventoryLowerOfCostOrMarketAdjustment	0	usd
CY2020	nrg	Oil Inventory Lower Of Cost Or Market Adjustment OilInventoryLowerOfCostOrMarketAdjustment	29000000	usd
CY2022	nrg	Proceeds Received Receivable From Government Grant ProceedsReceivedReceivableFromGovernmentGrant	689000000	usd
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CY2022	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	252000000	usd
CY2021	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	61000000	usd
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CY2021	nrg	Payments To Acquire Assets And Businesses Net Of Cash Acquired PaymentsToAcquireAssetsAndBusinessesNetOfCashAcquired	3559000000	usd
CY2020	nrg	Payments To Acquire Assets And Businesses Net Of Cash Acquired PaymentsToAcquireAssetsAndBusinessesNetOfCashAcquired	284000000	usd
CY2022	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	367000000	usd
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	269000000	usd
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	230000000	usd
CY2022	nrg	Payments For Proceeds From Intangible Assets PaymentsForProceedsFromIntangibleAssets	6000000	usd
CY2021	nrg	Payments For Proceeds From Intangible Assets PaymentsForProceedsFromIntangibleAssets	0	usd
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CY2022	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	454000000	usd
CY2021	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	751000000	usd
CY2020	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	492000000	usd
CY2022	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	448000000	usd
CY2021	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	710000000	usd
CY2020	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	439000000	usd
CY2022	us-gaap	Proceeds From Sale Of Other Productive Assets ProceedsFromSaleOfOtherProductiveAssets	109000000	usd
CY2021	us-gaap	Proceeds From Sale Of Other Productive Assets ProceedsFromSaleOfOtherProductiveAssets	830000000	usd
CY2020	us-gaap	Proceeds From Sale Of Other Productive Assets ProceedsFromSaleOfOtherProductiveAssets	81000000	usd
CY2022	nrg	Investments In Proceeds From Sales Of Unconsolidated Affiliates InvestmentsInProceedsFromSalesOfUnconsolidatedAffiliates	0	usd
CY2021	nrg	Investments In Proceeds From Sales Of Unconsolidated Affiliates InvestmentsInProceedsFromSalesOfUnconsolidatedAffiliates	0	usd
CY2020	nrg	Investments In Proceeds From Sales Of Unconsolidated Affiliates InvestmentsInProceedsFromSalesOfUnconsolidatedAffiliates	2000000	usd
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CY2022	us-gaap	Payments For Proceeds From Derivative Instrument Financing Activities PaymentsForProceedsFromDerivativeInstrumentFinancingActivities	-1995000000	usd
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CY2020	us-gaap	Payments For Proceeds From Derivative Instrument Financing Activities PaymentsForProceedsFromDerivativeInstrumentFinancingActivities	7000000	usd
CY2022	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	606000000	usd
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	48000000	usd
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	229000000	usd
CY2022	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	332000000	usd
CY2021	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	319000000	usd
CY2020	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	295000000	usd
CY2022	us-gaap	Proceeds From Issuance Of Senior Long Term Debt ProceedsFromIssuanceOfSeniorLongTermDebt	0	usd
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CY2020	us-gaap	Proceeds From Issuance Of Senior Long Term Debt ProceedsFromIssuanceOfSeniorLongTermDebt	3234000000	usd
CY2022	us-gaap	Repayments Of Other Debt RepaymentsOfOtherDebt	5000000	usd
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CY2020	us-gaap	Repayments Of Other Debt RepaymentsOfOtherDebt	335000000	usd
CY2022	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	0	usd
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CY2022	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	usd
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CY2022	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	0	usd
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CY2022	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	1043000000	usd
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CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	2204000000	usd
CY2022	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-3000000	usd
CY2021	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-2000000	usd
CY2020	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-2000000	usd
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	1068000000	usd
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-2820000000	usd
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	3545000000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	1110000000	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	3930000000	usd
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	385000000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	2178000000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	1110000000	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	3930000000	usd
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1658000000	usd
CY2020	us-gaap	Net Income Loss Including Portion Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest	510000000	usd
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-14000000	usd
CY2020	us-gaap	Adjustments To Additional Paid In Capital Other AdjustmentsToAdditionalPaidInCapitalOther	18000000	usd
CY2020	us-gaap	Adjustments To Additional Paid In Capital Other AdjustmentsToAdditionalPaidInCapitalOther	18000000	usd
CY2020	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	4000000	usd
CY2020	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	197000000	usd
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	-3000000	usd
CY2020	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	1000000	usd
CY2020	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	297000000	usd
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1680000000	usd
CY2021	us-gaap	Net Income Loss Including Portion Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest	2187000000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	80000000	usd
CY2021	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	4000000	usd
CY2021	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	44000000	usd
CY2021	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	12000000	usd
CY2021	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	1000000	usd
CY2021	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	320000000	usd
CY2021Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3600000000	usd
CY2022	us-gaap	Net Income Loss Including Portion Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest	1221000000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-51000000	usd
CY2022	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	6000000	usd
CY2022	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	595000000	usd
CY2022	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	24000000	usd
CY2022	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	334000000	usd
CY2022Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3828000000	usd
CY2022	us-gaap	Shares Paid For Tax Withholding For Share Based Compensation SharesPaidForTaxWithholdingForShareBasedCompensation	6000000	shares
CY2021	us-gaap	Shares Paid For Tax Withholding For Share Based Compensation SharesPaidForTaxWithholdingForShareBasedCompensation	9000000	shares
CY2020	us-gaap	Shares Paid For Tax Withholding For Share Based Compensation SharesPaidForTaxWithholdingForShareBasedCompensation	27000000	shares
CY2022	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.40
CY2021	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.30
CY2020	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.20
CY2022	us-gaap	Nature Of Operations NatureOfOperations	<span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Nature of Business</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%"> </span><div style="margin-bottom:6pt;text-align:justify;text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">General</span></div><div style="margin-bottom:6pt;text-align:justify;text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">NRG Energy, Inc., or NRG or the Company, is a consumer services company built on dynamic retail brands. NRG brings the power of energy to customers by producing and selling energy and related products and services, nation-wide in the U.S. and Canada in a manner that delivers value to all of NRG's stakeholders. NRG sells power, natural gas, home and power services, and develops innovative, sustainable solutions, predominately under the brand names NRG, Reliant, Direct Energy, Green Mountain Energy, Stream, and XOOM Energy. The Company has a customer base that includes approximately 5.4 million Home customers as well as commercial, industrial, and wholesale customers, supported by approximately 16 GW of generation. </span></div><div style="margin-bottom:6pt;text-align:justify;text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">On December 6, 2022, NRG and Vivint Smart Home, Inc. announced the entry into a definitive agreement under which the Company will acquire Vivint, a smart home platform company, in an all-cash transaction. The acquisition will accelerate the realization of NRG’s consumer-focused growth strategy and create a leading essential home services platform fueled by market-leading brands, unparalleled insights, proprietary technologies and complementary sales channels. Close of the acquisition is targeted for the first quarter of 2023 and is subject to customary closing conditions.</span></div><div style="margin-bottom:6pt;text-align:justify;text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:112%">The Company manages its operations based on the combined results of the retail and wholesale generation businesses with a geographical focus. </span></div><div style="margin-bottom:3pt;text-align:justify;text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:115%">The Company's business is segmented as follows:</span></div><div style="margin-bottom:3pt;padding-left:36pt;text-align:justify;text-indent:-13.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:10pt">Texas, which includes all activity related to customer, plant and market operations in Texas; </span></div><div style="margin-bottom:3pt;padding-left:36pt;text-align:justify;text-indent:-13.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:10pt">East, which includes all activity related to customer, plant and market operations in the East; </span></div><div style="margin-bottom:3pt;padding-left:36pt;text-align:justify;text-indent:-13.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:10pt">West/Services/Other, which includes the following assets and activities: (i) all activity related to customer, plant and market operations in the West and Canada, (ii) the Services businesses (iii) activity related to the Cottonwood facility, (iv) the remaining renewables activity, including the Company’s equity method investment in Ivanpah Master Holdings, LLC, and (v) activity related to the Company’s equity method investment for the Gladstone power plant in Australia; and</span></div>•Corporate activities.
CY2022Q4	nrg	Power Generation Capacity Megawatts PowerGenerationCapacityMegawatts	16	mw
CY2022Q2	nrg	Proceeds From Government Grant ProceedsFromGovernmentGrant	689000000	usd
CY2021Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	683000000	usd
CY2020Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	67000000	usd
CY2019Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	43000000	usd
CY2022	nrg	Accounts Receivable Allowance For Credit Loss Acquired In Acquisition AccountsReceivableAllowanceForCreditLossAcquiredInAcquisition	0	usd
CY2021	nrg	Accounts Receivable Allowance For Credit Loss Acquired In Acquisition AccountsReceivableAllowanceForCreditLossAcquiredInAcquisition	112000000	usd
CY2020	nrg	Accounts Receivable Allowance For Credit Loss Acquired In Acquisition AccountsReceivableAllowanceForCreditLossAcquiredInAcquisition	0	usd
CY2022	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	11000000	usd
CY2021	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	698000000	usd
CY2020	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	108000000	usd
CY2022	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	593000000	usd
CY2021	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	224000000	usd
CY2020	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	101000000	usd
CY2022	us-gaap	Allowance For Doubtful Accounts Receivable Recoveries AllowanceForDoubtfulAccountsReceivableRecoveries	32000000	usd
CY2021	us-gaap	Allowance For Doubtful Accounts Receivable Recoveries AllowanceForDoubtfulAccountsReceivableRecoveries	30000000	usd
CY2020	us-gaap	Allowance For Doubtful Accounts Receivable Recoveries AllowanceForDoubtfulAccountsReceivableRecoveries	17000000	usd
CY2022Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	133000000	usd
CY2021Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	683000000	usd
CY2020Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	67000000	usd
CY2022	nrg	Accounts Receivable Allowance For Credit Loss Increase Decrease Due Finance Hedge Risk AccountsReceivableAllowanceForCreditLossIncreaseDecreaseDueFinanceHedgeRisk	-70000000	usd
CY2021	nrg	Accounts Receivable Allowance For Credit Loss Increase Decrease Due Finance Hedge Risk AccountsReceivableAllowanceForCreditLossIncreaseDecreaseDueFinanceHedgeRisk	403000000	usd
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	430000000	usd
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	250000000	usd
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	3905000000	usd
CY2022Q4	nrg	Funds Deposited By Counterparties FundsDepositedByCounterparties	1708000000	usd
CY2021Q4	nrg	Funds Deposited By Counterparties FundsDepositedByCounterparties	845000000	usd
CY2020Q4	nrg	Funds Deposited By Counterparties FundsDepositedByCounterparties	19000000	usd
CY2022Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	40000000	usd
CY2021Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	15000000	usd
CY2020Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	6000000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	2178000000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	1110000000	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	3930000000	usd
CY2022	us-gaap	Proceeds From Insurance Settlement Operating Activities ProceedsFromInsuranceSettlementOperatingActivities	81000000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	2100000000	usd
CY2021Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	1600000000	usd
CY2022	nrg	Gross Receipts Tax GrossReceiptsTax	218000000	usd
CY2021	nrg	Gross Receipts Tax GrossReceiptsTax	184000000	usd
CY2020	nrg	Gross Receipts Tax GrossReceiptsTax	107000000	usd
CY2022	nrg	Cost Of Services Energy Services Unbilled CostOfServicesEnergyServicesUnbilled	202000000	usd
CY2021	nrg	Cost Of Services Energy Services Unbilled CostOfServicesEnergyServicesUnbilled	189000000	usd
CY2020	nrg	Cost Of Services Energy Services Unbilled CostOfServicesEnergyServicesUnbilled	98000000	usd
CY2022	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-7000000	usd
CY2022Q4	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	55000000	usd
CY2021Q4	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	-8000000	usd
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	-2000000	usd
CY2022	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div style="margin-bottom:6pt;text-align:justify;text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Concentrations of Credit Risk</span></div><div style="margin-bottom:6pt;text-align:justify;text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Financial instruments that 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 Note 5, </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Fair Value of Financial Instruments,</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> for a further discussion of derivative concentrations.</span></div>
CY2022	us-gaap	Advertising Expense AdvertisingExpense	82000000	usd
CY2021	us-gaap	Advertising Expense AdvertisingExpense	109000000	usd
CY2020	us-gaap	Advertising Expense AdvertisingExpense	74000000	usd
CY2022	us-gaap	Use Of Estimates UseOfEstimates	<div style="margin-bottom:6pt;text-align:justify;text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Use of Estimates</span></div><div style="margin-bottom:6pt;text-align:justify;text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">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. </span></div><div style="margin-bottom:6pt;text-align:justify;text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">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.</span></div>
CY2022	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<div style="margin-bottom:6pt;text-align:justify;text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Reclassifications</span></div><div style="margin-bottom:6pt;text-align:justify;text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Certain prior period amounts have been reclassified for comparative purposes. The reclassifications did not affect results from operations, net assets or cash flows.</span></div>
CY2022Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	77000000	usd
CY2022Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	23000000	usd
CY2022Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	2000000	usd
CY2022	us-gaap	Revenue Not From Contract With Customer Other RevenueNotFromContractWithCustomerOther	35000000	usd
CY2022	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	31488000000	usd
CY2021	us-gaap	Revenue Not From Contract With Customer Other RevenueNotFromContractWithCustomerOther	-22000000	usd
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	26777000000	usd
CY2020	us-gaap	Revenue Not From Contract With Customer Other RevenueNotFromContractWithCustomerOther	18000000	usd
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	8690000000	usd
CY2022Q4	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	126000000	usd
CY2021Q4	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	133000000	usd
CY2022Q4	us-gaap	Accounts Receivable Net AccountsReceivableNet	4773000000	usd
CY2021Q4	us-gaap	Accounts Receivable Net AccountsReceivableNet	3245000000	usd
CY2022Q4	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	1952000000	usd
CY2021Q4	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	1574000000	usd
CY2022Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	186000000	usd
CY2021Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	227000000	usd
CY2022	nrg	Contractwith Customer Liability Increase For Cash Payments Received ContractwithCustomerLiabilityIncreaseForCashPaymentsReceived	175000000	usd
CY2021	nrg	Contractwith Customer Liability Increase For Cash Payments Received ContractwithCustomerLiabilityIncreaseForCashPaymentsReceived	224000000	usd
CY2022	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	184000000	usd
CY2021	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	23000000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	19000000	usd
CY2022Q4	us-gaap	Financial Instruments Owned Us Government And Agency Obligations At Fair Value FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue	1000000	usd
CY2022Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	12858000000	usd
CY2022Q4	us-gaap	Liabilities Fair Value Disclosure LiabilitiesFairValueDisclosure	8441000000	usd
CY2021Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	32000000	usd
CY2021Q4	us-gaap	Financial Instruments Owned Us Government And Agency Obligations At Fair Value FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue	1000000	usd
CY2021Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	8188000000	usd
CY2021Q4	us-gaap	Liabilities Fair Value Disclosure LiabilitiesFairValueDisclosure	4799000000	usd
CY2022Q4	nrg	Derivative Asset Fair Value Determined Using Valuation Techniques Percentage DerivativeAssetFairValueDeterminedUsingValuationTechniquesPercentage	0.10
CY2022Q4	nrg	Derivative Liability Fair Value Determined Using Valuation Techniques Percentage DerivativeLiabilityFairValueDeterminedUsingValuationTechniquesPercentage	0.09
CY2022	nrg	Change In Credit Reserve ChangeInCreditReserve	-9000000	usd
CY2021	nrg	Change In Credit Reserve ChangeInCreditReserve	-11000000	usd
CY2022Q4	nrg	Derivative Liability Not Subject To Master Netting Arrangement Collateral Right To Reclaim Cash Not Offset DerivativeLiabilityNotSubjectToMasterNettingArrangementCollateralRightToReclaimCashNotOffset	260000000	usd
CY2022Q4	nrg	Derivative Asset Not Subject To Master Netting Arrangement Collateral Obligation To Return Cash Not Offset DerivativeAssetNotSubjectToMasterNettingArrangementCollateralObligationToReturnCashNotOffset	1700000000	usd
CY2022Q4	nrg	Amount Of Credit Exposure To Significant Portion Of All Counterparties AmountOfCreditExposureToSignificantPortionOfAllCounterparties	2700000000	usd
CY2022Q4	nrg	Collateral Held Cash And Letters Of Credit CollateralHeldCashAndLettersOfCredit	1000000000	usd
CY2022Q4	nrg	Net Credit Exposure NetCreditExposure	1700000000	usd
CY2022	nrg	Counterparty Credit Risk Exposure Percentage Of Credit Risk Roll Off CounterpartyCreditRiskExposurePercentageOfCreditRiskRollOff	0.80
CY2022Q4	nrg	Credit Derivative Maximum Net Exposure Percentage CreditDerivativeMaximumNetExposurePercentage	1
CY2022Q4	nrg	Fair Valueof Gross Derivative Assets Liabilities Net FairValueofGrossDerivativeAssetsLiabilitiesNet	3553000000	usd
CY2022Q4	nrg	Credit Derivative Maximum Net Exposure Percentage CreditDerivativeMaximumNetExposurePercentage	1
CY2022	nrg	Counterparty Credit Risk Exposure Percentage Threshold CounterpartyCreditRiskExposurePercentageThreshold	0.10
CY2022Q4	nrg	Proceeds From Loss Mitigation Efforts On Derivative Hedging Agreements ProceedsFromLossMitigationEffortsOnDerivativeHedgingAgreements	70000000	usd
CY2022	nrg	Estimated Counterparty Credit Risk Exposure To Certain Counterparties EstimatedCounterpartyCreditRiskExposureToCertainCounterparties	1100000000	usd
CY2022	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	11000000	usd
CY2021	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	698000000	usd
CY2020	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	108000000	usd
CY2022Q4	nrg	Derivative Asset Fair Value Gross Liability Net Of Derivative Liability Fair Value Gross Asset DerivativeAssetFairValueGrossLiabilityNetOfDerivativeLiabilityFairValueGrossAsset	0	usd
CY2022Q4	nrg	Derivative Collateral Obligation To Return Cash Net Of Derivative Collateral Right To Reclaim Cash DerivativeCollateralObligationToReturnCashNetOfDerivativeCollateralRightToReclaimCash	-1639000000	usd
CY2022Q4	nrg	Derivative Asset Fair Value Amount Offset Against Collateral Net Of Derivative Liability Fair Value Amount Offset Against Collateral DerivativeAssetFairValueAmountOffsetAgainstCollateralNetOfDerivativeLiabilityFairValueAmountOffsetAgainstCollateral	1914000000	usd
CY2021Q4	nrg	Fair Valueof Gross Derivative Assets Liabilities Net FairValueofGrossDerivativeAssetsLiabilitiesNet	2341000000	usd
CY2021Q4	nrg	Derivative Asset Fair Value Gross Liability Net Of Derivative Liability Fair Value Gross Asset DerivativeAssetFairValueGrossLiabilityNetOfDerivativeLiabilityFairValueGrossAsset	0	usd
CY2021Q4	nrg	Derivative Collateral Obligation To Return Cash Net Of Derivative Collateral Right To Reclaim Cash DerivativeCollateralObligationToReturnCashNetOfDerivativeCollateralRightToReclaimCash	-814000000	usd
CY2021Q4	nrg	Derivative Asset Fair Value Amount Offset Against Collateral Net Of Derivative Liability Fair Value Amount Offset Against Collateral DerivativeAssetFairValueAmountOffsetAgainstCollateralNetOfDerivativeLiabilityFairValueAmountOffsetAgainstCollateral	1527000000	usd
CY2022	nrg	Reversal Previously Recognized Unrealized Gains Losses Settled Positions Economic Hedges ReversalPreviouslyRecognizedUnrealizedGainsLossesSettledPositionsEconomicHedges	1232000000	usd
CY2021	nrg	Reversal Previously Recognized Unrealized Gains Losses Settled Positions Economic Hedges ReversalPreviouslyRecognizedUnrealizedGainsLossesSettledPositionsEconomicHedges	41000000	usd
CY2020	nrg	Reversal Previously Recognized Unrealized Gains Losses Settled Positions Economic Hedges ReversalPreviouslyRecognizedUnrealizedGainsLossesSettledPositionsEconomicHedges	55000000	usd
CY2022	nrg	Reversal Previously Recognized Unrealized Gains Losses Acquiredas Partof Acquisition Economic Hedges ReversalPreviouslyRecognizedUnrealizedGainsLossesAcquiredasPartofAcquisitionEconomicHedges	-2000000	usd
CY2021	nrg	Reversal Previously Recognized Unrealized Gains Losses Acquiredas Partof Acquisition Economic Hedges ReversalPreviouslyRecognizedUnrealizedGainsLossesAcquiredasPartofAcquisitionEconomicHedges	-256000000	usd
CY2020	nrg	Reversal Previously Recognized Unrealized Gains Losses Acquiredas Partof Acquisition Economic Hedges ReversalPreviouslyRecognizedUnrealizedGainsLossesAcquiredasPartofAcquisitionEconomicHedges	-4000000	usd
CY2022	nrg	Unrealized Gain Loss On Derivatives Mark To Market Economic Hedging Activities UnrealizedGainLossOnDerivativesMarkToMarketEconomicHedgingActivities	1248000000	usd
CY2021	nrg	Unrealized Gain Loss On Derivatives Mark To Market Economic Hedging Activities UnrealizedGainLossOnDerivativesMarkToMarketEconomicHedgingActivities	2716000000	usd
CY2020	nrg	Unrealized Gain Loss On Derivatives Mark To Market Economic Hedging Activities UnrealizedGainLossOnDerivativesMarkToMarketEconomicHedgingActivities	-119000000	usd
CY2022	nrg	Reversal Previously Unrecognized Unrealized Gains Losses Settled Positions Trading Activity ReversalPreviouslyUnrecognizedUnrealizedGainsLossesSettledPositionsTradingActivity	-13000000	usd
CY2021	nrg	Reversal Previously Unrecognized Unrealized Gains Losses Settled Positions Trading Activity ReversalPreviouslyUnrecognizedUnrealizedGainsLossesSettledPositionsTradingActivity	18000000	usd
CY2020	nrg	Reversal Previously Unrecognized Unrealized Gains Losses Settled Positions Trading Activity ReversalPreviouslyUnrecognizedUnrealizedGainsLossesSettledPositionsTradingActivity	20000000	usd
CY2022	nrg	Reversal Of Acquired Gain Positions Related To Trading Activity ReversalOfAcquiredGainPositionsRelatedToTradingActivity	0	usd
CY2021	nrg	Reversal Of Acquired Gain Positions Related To Trading Activity ReversalOfAcquiredGainPositionsRelatedToTradingActivity	1000000	usd
CY2020	nrg	Reversal Of Acquired Gain Positions Related To Trading Activity ReversalOfAcquiredGainPositionsRelatedToTradingActivity	0	usd
CY2022	nrg	Derivative Unrealized Gains On Open Positions Related To Trading Activity Net DerivativeUnrealizedGainsOnOpenPositionsRelatedToTradingActivityNet	-17000000	usd
CY2021	nrg	Derivative Unrealized Gains On Open Positions Related To Trading Activity Net DerivativeUnrealizedGainsOnOpenPositionsRelatedToTradingActivityNet	-13000000	usd
CY2020	nrg	Derivative Unrealized Gains On Open Positions Related To Trading Activity Net DerivativeUnrealizedGainsOnOpenPositionsRelatedToTradingActivityNet	15000000	usd
CY2022	nrg	Unrealized Gain Losson Derivatives Mark To Market Trading Activities UnrealizedGainLossonDerivativesMarkToMarketTradingActivities	-4000000	usd
CY2021	nrg	Unrealized Gain Losson Derivatives Mark To Market Trading Activities UnrealizedGainLossonDerivativesMarkToMarketTradingActivities	-32000000	usd
CY2020	nrg	Unrealized Gain Losson Derivatives Mark To Market Trading Activities UnrealizedGainLossonDerivativesMarkToMarketTradingActivities	-5000000	usd
CY2022	us-gaap	Unrealized Gain Loss On Derivatives And Commodity Contracts UnrealizedGainLossOnDerivativesAndCommodityContracts	1244000000	usd
CY2021	us-gaap	Unrealized Gain Loss On Derivatives And Commodity Contracts UnrealizedGainLossOnDerivativesAndCommodityContracts	2684000000	usd
CY2020	us-gaap	Unrealized Gain Loss On Derivatives And Commodity Contracts UnrealizedGainLossOnDerivativesAndCommodityContracts	-124000000	usd
CY2022Q4	us-gaap	Derivative Net Liability Position Aggregate Fair Value DerivativeNetLiabilityPositionAggregateFairValue	195000000	usd
CY2022Q4	us-gaap	Additional Collateral Aggregate Fair Value AdditionalCollateralAggregateFairValue	30000000	usd
CY2022Q4	us-gaap	Decommissioning Trust Assets Amount DecommissioningTrustAssetsAmount	838000000	usd
CY2022	nrg	Decommissioning Fund Investments Unrealized Gains DecommissioningFundInvestmentsUnrealizedGains	346000000	usd
CY2022	nrg	Decommissioning Fund Investments Unrealized Loss DecommissioningFundInvestmentsUnrealizedLoss	36000000	usd
CY2021Q4	us-gaap	Decommissioning Trust Assets Amount DecommissioningTrustAssetsAmount	1008000000	usd
CY2021	nrg	Decommissioning Fund Investments Unrealized Gains DecommissioningFundInvestmentsUnrealizedGains	471000000	usd
CY2021	nrg	Decommissioning Fund Investments Unrealized Loss DecommissioningFundInvestmentsUnrealizedLoss	2000000	usd
CY2022	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	14000000	usd
CY2021	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	47000000	usd
CY2020	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	34000000	usd
CY2022	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	25000000	usd
CY2021	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	9000000	usd
CY2020	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	13000000	usd
CY2022	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	448000000	usd
CY2021	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	710000000	usd
CY2020	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	439000000	usd
CY2022Q4	us-gaap	Energy Related Inventory Petroleum EnergyRelatedInventoryPetroleum	8000000	usd
CY2021Q4	us-gaap	Energy Related Inventory Petroleum EnergyRelatedInventoryPetroleum	8000000	usd
CY2022Q4	us-gaap	Energy Related Inventory Coal EnergyRelatedInventoryCoal	114000000	usd
CY2021Q4	us-gaap	Energy Related Inventory Coal EnergyRelatedInventoryCoal	83000000	usd
CY2022Q4	us-gaap	Energy Related Inventory Natural Gas In Storage EnergyRelatedInventoryNaturalGasInStorage	385000000	usd
CY2021Q4	us-gaap	Energy Related Inventory Natural Gas In Storage EnergyRelatedInventoryNaturalGasInStorage	206000000	usd
CY2022Q4	nrg	Inventory Spare Parts And Finished Goods Gross InventorySparePartsAndFinishedGoodsGross	244000000	usd
CY2021Q4	nrg	Inventory Spare Parts And Finished Goods Gross InventorySparePartsAndFinishedGoodsGross	201000000	usd
CY2022Q4	us-gaap	Inventory Net InventoryNet	751000000	usd
CY2021Q4	us-gaap	Inventory Net InventoryNet	498000000	usd
CY2022Q4	us-gaap	Public Utilities Property Plant And Equipment Plant In Service PublicUtilitiesPropertyPlantAndEquipmentPlantInService	3170000000	usd
CY2021Q4	us-gaap	Public Utilities Property Plant And Equipment Plant In Service PublicUtilitiesPropertyPlantAndEquipmentPlantInService	2996000000	usd
CY2022Q4	us-gaap	Public Utilities Property Plant And Equipment Accumulated Depreciation PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation	1478000000	usd
CY2021Q4	us-gaap	Public Utilities Property Plant And Equipment Accumulated Depreciation PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation	1308000000	usd
CY2022Q4	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	1692000000	usd
CY2021Q4	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	1688000000	usd
CY2022	us-gaap	Depreciation Depreciation	291000000	usd
CY2021	us-gaap	Depreciation Depreciation	384000000	usd
CY2020	us-gaap	Depreciation Depreciation	295000000	usd
CY2022	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	4000000	usd
CY2021	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	4000000	usd
CY2020	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	3000000	usd
CY2022	us-gaap	Operating Lease Cost OperatingLeaseCost	85000000	usd
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	91000000	usd
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	100000000	usd
CY2022	us-gaap	Short Term Lease Cost ShortTermLeaseCost	7000000	usd
CY2021	us-gaap	Short Term Lease Cost ShortTermLeaseCost	3000000	usd
CY2020	us-gaap	Short Term Lease Cost ShortTermLeaseCost	3000000	usd
CY2022	us-gaap	Variable Lease Cost VariableLeaseCost	86000000	usd
CY2021	us-gaap	Variable Lease Cost VariableLeaseCost	9000000	usd
CY2020	us-gaap	Variable Lease Cost VariableLeaseCost	6000000	usd
CY2022	us-gaap	Sublease Income SubleaseIncome	2000000	usd
CY2021	us-gaap	Sublease Income SubleaseIncome	2000000	usd
CY2020	us-gaap	Sublease Income SubleaseIncome	17000000	usd
CY2022	us-gaap	Lease Cost LeaseCost	180000000	usd
CY2021	us-gaap	Lease Cost LeaseCost	105000000	usd
CY2020	us-gaap	Lease Cost LeaseCost	95000000	usd
CY2022	us-gaap	Operating Lease Payments OperatingLeasePayments	183000000	usd
CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	102000000	usd
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	101000000	usd
CY2022	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	5000000	usd
CY2021	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	6000000	usd
CY2020	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	1000000	usd
CY2022	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	3000000	usd
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	16000000	usd
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	5000000	usd
CY2022	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	28000000	usd
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	47000000	usd
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	4000000	usd
CY2022Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P2Y7M6D
CY2021Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P3Y7M6D
CY2022Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.0282
CY2021Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.0246
CY2022Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P4Y3M18D
CY2021Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P4Y8M12D
CY2022Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0537
CY2021Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0544
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	97000000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	82000000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	56000000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	14000000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	10000000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	52000000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	311000000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	48000000	usd
CY2022Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	263000000	usd
CY2022Q2	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	130000000	usd
CY2020Q4	us-gaap	Goodwill Goodwill	579000000	usd
CY2021	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	1250000000	usd
CY2021	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	35000000	usd
CY2021	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	1000000	usd
CY2021Q4	us-gaap	Goodwill Goodwill	1795000000	usd
CY2022	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	130000000	usd
CY2022	us-gaap	Goodwill Written Off Related To Sale Of Business Unit GoodwillWrittenOffRelatedToSaleOfBusinessUnit	6000000	usd
CY2022	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	-9000000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	1650000000	usd
CY2021Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	4147000000	usd
CY2022	nrg	Finite Lived Intangible Assets Purchases FiniteLivedIntangibleAssetsPurchases	430000000	usd
CY2022	us-gaap	Finitelived Intangible Assets Acquired1 FinitelivedIntangibleAssetsAcquired1	55000000	usd
CY2022	nrg	Finite Lived Intangible Assets Usage And Retirements FiniteLivedIntangibleAssetsUsageAndRetirements	374000000	usd
CY2022	nrg	Finite Lived Intangible Assets Write Off Of Fully Amortized Intangible Assets FiniteLivedIntangibleAssetsWriteOffOfFullyAmortizedIntangibleAssets	14000000	usd
CY2022	nrg	Finite Lived Intangible Assets Other Changes FiniteLivedIntangibleAssetsOtherChanges	0	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	4244000000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	2112000000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	2132000000	usd
CY2020Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	2025000000	usd
CY2021	nrg	Finite Lived Intangible Assets Purchases FiniteLivedIntangibleAssetsPurchases	348000000	usd
CY2021	us-gaap	Finitelived Intangible Assets Acquired1 FinitelivedIntangibleAssetsAcquired1	2352000000	usd
CY2021	nrg	Finite Lived Intangible Assets Usage And Retirements FiniteLivedIntangibleAssetsUsageAndRetirements	365000000	usd
CY2021	nrg	Finite Lived Intangible Assets Write Off Of Fully Amortized Intangible Assets FiniteLivedIntangibleAssetsWriteOffOfFullyAmortizedIntangibleAssets	216000000	usd
CY2021	nrg	Finite Lived Intangible Assets Other Changes FiniteLivedIntangibleAssetsOtherChanges	3000000	usd
CY2021Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	4147000000	usd
CY2021Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	1636000000	usd
CY2021Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	2511000000	usd
CY2022	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	490000000	usd
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	495000000	usd
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	168000000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	436000000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	315000000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	243000000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	213000000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	162000000	usd
CY2021Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	720000000	usd
CY2022	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	38000000	usd
CY2022	us-gaap	Costs Incurred Asset Retirement Obligation Incurred CostsIncurredAssetRetirementObligationIncurred	1000000	usd
CY2022	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	33000000	usd
CY2022	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	38000000	usd
CY2022	nrg	Asset Retirement Obligations Other AssetRetirementObligationsOther	-6000000	usd
CY2022Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	758000000	usd
CY2022Q4	us-gaap	Long Term Debt LongTermDebt	8100000000	usd
CY2021Q4	us-gaap	Long Term Debt LongTermDebt	8100000000	usd
CY2022Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	11000000	usd
CY2021Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	13000000	usd
CY2022Q4	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	8111000000	usd
CY2021Q4	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	8113000000	usd
CY2022Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	63000000	usd
CY2021Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	4000000	usd
CY2022Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	70000000	usd
CY2021Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	83000000	usd
CY2022Q4	us-gaap	Debt Instrument Unamortized Discount Premium Net DebtInstrumentUnamortizedDiscountPremiumNet	2000000	usd
CY2021Q4	us-gaap	Debt Instrument Unamortized Discount Premium Net DebtInstrumentUnamortizedDiscountPremiumNet	60000000	usd
CY2022Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	7976000000	usd
CY2021Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	7966000000	usd
CY2022Q4	us-gaap	Debt Instrument Unamortized Discount Premium Net DebtInstrumentUnamortizedDiscountPremiumNet	2000000	usd
CY2021Q4	us-gaap	Debt Instrument Unamortized Discount Premium Net DebtInstrumentUnamortizedDiscountPremiumNet	60000000	usd
CY2022Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	63000000	usd
CY2022Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	604000000	usd
CY2022Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	749000000	usd
CY2022Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	1000000	usd
CY2022Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	1275000000	usd
CY2022Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	5419000000	usd
CY2022Q4	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	8111000000	usd
CY2021	us-gaap	Write Off Of Deferred Debt Issuance Cost WriteOffOfDeferredDebtIssuanceCost	12000000	usd
CY2022Q4	us-gaap	Debt Instrument Repurchased Face Amount DebtInstrumentRepurchasedFaceAmount	1855000000	usd
CY2022	us-gaap	Repayments Of Senior Debt RepaymentsOfSeniorDebt	1949000000	usd
CY2021Q4	us-gaap	Interest Payable Current InterestPayableCurrent	29000000	usd
CY2022Q4	nrg	Number Of Defined Benefit Plans NumberOfDefinedBenefitPlans	3	benefitplan
CY2022Q4	us-gaap	Temporary Equity Shares Authorized TemporaryEquitySharesAuthorized	10000000	shares
CY2021Q4	us-gaap	Temporary Equity Shares Authorized TemporaryEquitySharesAuthorized	10000000	shares
CY2022	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	26000000	usd
CY2021	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	25000000	usd
CY2020	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	22000000	usd
CY2019Q4	us-gaap	Temporary Equity Shares Authorized TemporaryEquitySharesAuthorized	10000000	shares
CY2020Q4	us-gaap	Temporary Equity Shares Authorized TemporaryEquitySharesAuthorized	10000000	shares
CY2021Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000	shares
CY2022Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000	shares
CY2020Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000	shares
CY2019Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000	shares
CY2020	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	6062783	shares
CY2021	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	1084752	shares
CY2022	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	14685521	shares
CY2022	nrg	Common Stock Quarterly Dividends Per Share Cash Paid CommonStockQuarterlyDividendsPerShareCashPaid	0.350
CY2021	nrg	Common Stock Quarterly Dividends Per Share Cash Paid CommonStockQuarterlyDividendsPerShareCashPaid	0.325
CY2020	nrg	Common Stock Quarterly Dividends Per Share Cash Paid CommonStockQuarterlyDividendsPerShareCashPaid	0.30
CY2022	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.40
CY2021	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.30
CY2020	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.20
CY2020Q1	nrg	Common Stock Dividends Proposed Annual Amount Per Share CommonStockDividendsProposedAnnualAmountPerShare	1.20
CY2019	nrg	Common Stock Dividends Proposed Annual Amount Per Share CommonStockDividendsProposedAnnualAmountPerShare	0.12
CY2021	nrg	Common Stock Dividends Proposed Annual Amount Per Share CommonStockDividendsProposedAnnualAmountPerShare	1.30
CY2022	nrg	Common Stock Dividends Proposed Annual Amount Per Share CommonStockDividendsProposedAnnualAmountPerShare	1.40
CY2022	nrg	Common Stock Annual Dividends Increase Decrease Percentage CommonStockAnnualDividendsIncreaseDecreasePercentage	0.08
CY2021	nrg	Common Stock Annual Dividends Increase Decrease Percentage CommonStockAnnualDividendsIncreaseDecreasePercentage	0.08
CY2022	nrg	Employee Stock Purchase Plan Minimum Percentageof Compensation Eligible EmployeeStockPurchasePlanMinimumPercentageofCompensationEligible	0.01
CY2022	nrg	Employee Stock Purchase Plan Maximum Percentage Of Compensation Eligible EmployeeStockPurchasePlanMaximumPercentageOfCompensationEligible	0.10
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Discount From Market Price Purchase Date ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPricePurchaseDate	0.95
CY2022	nrg	Employee Stock Purchase Plan Exercise Price As Percentage Of Fair Value EmployeeStockPurchasePlanExercisePriceAsPercentageOfFairValue	0.95
CY2021Q4	nrg	Common Stock Capital Shares Reserved For Employee Stock Purchase Plan CommonStockCapitalSharesReservedForEmployeeStockPurchasePlan	2493374	shares
CY2022Q4	us-gaap	Equity Method Investments EquityMethodInvestments	133000000	usd
CY2022Q4	us-gaap	Retained Earnings Undistributed Earnings From Equity Method Investees RetainedEarningsUndistributedEarningsFromEquityMethodInvestees	42000000	usd
CY2021Q4	us-gaap	Retained Earnings Undistributed Earnings From Equity Method Investees RetainedEarningsUndistributedEarningsFromEquityMethodInvestees	33000000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	1221000000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	2187000000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	510000000	usd
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	236000000	shares
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	245000000	shares
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	245000000	shares
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	245000000	shares
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.17
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	8.93
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.08
CY2022	us-gaap	Net Income Loss NetIncomeLoss	1221000000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	2187000000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	510000000	usd
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	236000000	shares
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	245000000	shares
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	245000000	shares
CY2022	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
CY2021	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
CY2020	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1000000	shares
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	236000000	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	245000000	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	245000000	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	245000000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	246000000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	246000000	shares
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.17
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	8.93
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.07
CY2022	us-gaap	Revenues Revenues	31543000000	usd
CY2022	nrg	Costofrevenueincludingsellingmarketingandgeneraladministrative Costofrevenueincludingsellingmarketingandgeneraladministrative	28737000000	usd
CY2022	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	634000000	usd
CY2022	us-gaap	Asset Impairment Charges AssetImpairmentCharges	206000000	usd
CY2022	us-gaap	Costs And Expenses CostsAndExpenses	29577000000	usd
CY2022	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	52000000	usd
CY2022	us-gaap	Operating Income Loss OperatingIncomeLoss	2018000000	usd
CY2022	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	6000000	usd
CY2022	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	56000000	usd
CY2022	us-gaap	Interest Expense InterestExpense	417000000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1663000000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	442000000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	1221000000	usd
CY2022Q4	us-gaap	Equity Method Investments EquityMethodInvestments	133000000	usd
CY2022Q4	nrg	Capital Expenditures CapitalExpenditures	367000000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	1650000000	usd
CY2022Q4	us-gaap	Assets Assets	29146000000	usd
CY2021	us-gaap	Revenues Revenues	26989000000	usd
CY2021	nrg	Costofrevenueincludingsellingmarketingandgeneraladministrative Costofrevenueincludingsellingmarketingandgeneraladministrative	22566000000	usd
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	785000000	usd
CY2021	us-gaap	Asset Impairment Charges AssetImpairmentCharges	544000000	usd
CY2021	us-gaap	Costs And Expenses CostsAndExpenses	23895000000	usd
CY2021	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	247000000	usd
CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	3341000000	usd
CY2021	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	17000000	usd
CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	63000000	usd
CY2021	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-77000000	usd
CY2021	us-gaap	Interest Expense InterestExpense	485000000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	2859000000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	672000000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	2187000000	usd
CY2021Q4	us-gaap	Equity Method Investments EquityMethodInvestments	157000000	usd
CY2021Q4	nrg	Capital Expenditures CapitalExpenditures	269000000	usd
CY2021Q4	us-gaap	Goodwill Goodwill	1795000000	usd
CY2021Q4	us-gaap	Assets Assets	23182000000	usd
CY2020	us-gaap	Revenues Revenues	9093000000	usd
CY2020	nrg	Costofrevenueincludingsellingmarketingandgeneraladministrative Costofrevenueincludingsellingmarketingandgeneraladministrative	7481000000	usd
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	435000000	usd
CY2020	us-gaap	Asset Impairment Charges AssetImpairmentCharges	75000000	usd
CY2020	us-gaap	Costs And Expenses CostsAndExpenses	7991000000	usd
CY2020	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	3000000	usd
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	1105000000	usd
CY2020	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	17000000	usd
CY2020	us-gaap	Impairment Of Investments ImpairmentOfInvestments	18000000	usd
CY2020	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	67000000	usd
CY2020	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-9000000	usd
CY2020	us-gaap	Interest Expense InterestExpense	401000000	usd
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	761000000	usd
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	251000000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	510000000	usd
CY2022	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	3000000	usd
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	usd
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	usd
CY2022	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	65000000	usd
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	48000000	usd
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	22000000	usd
CY2022	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	3000000	usd
CY2021	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	3000000	usd
CY2020	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	4000000	usd
CY2022	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	71000000	usd
CY2021	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	51000000	usd
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	26000000	usd
CY2022	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	258000000	usd
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	569000000	usd
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	168000000	usd
CY2022	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	59000000	usd
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	36000000	usd
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	60000000	usd
CY2022	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	54000000	usd
CY2021	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	16000000	usd
CY2020	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-3000000	usd
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	371000000	usd
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	621000000	usd
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	225000000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	442000000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	672000000	usd
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	251000000	usd
CY2022	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.266
CY2021	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.235
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.330
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	1436000000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	2759000000	usd
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	749000000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	227000000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	100000000	usd
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	12000000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1663000000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	2859000000	usd
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	761000000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1663000000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	2859000000	usd
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	761000000	usd
CY2022	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	349000000	usd
CY2021	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	600000000	usd
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	160000000	usd
CY2022	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	7000000	usd
CY2021	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-3000000	usd
CY2020	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	0	usd
CY2022	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	69000000	usd
CY2021	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	111000000	usd
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	18000000	usd
CY2022	nrg	Effective Income Tax Rate Reconciliation Permanent Differences Amount EffectiveIncomeTaxRateReconciliationPermanentDifferencesAmount	17000000	usd
CY2021	nrg	Effective Income Tax Rate Reconciliation Permanent Differences Amount EffectiveIncomeTaxRateReconciliationPermanentDifferencesAmount	8000000	usd
CY2020	nrg	Effective Income Tax Rate Reconciliation Permanent Differences Amount EffectiveIncomeTaxRateReconciliationPermanentDifferencesAmount	8000000	usd
CY2022	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-3000000	usd
CY2021	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-29000000	usd
CY2020	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	24000000	usd
CY2022	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	14000000	usd
CY2021	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	-10000000	usd
CY2020	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	2000000	usd
CY2022	nrg	Effective Income Tax Rate Reconciliation Reversal Of Uncertain Tax Positions Reserves EffectiveIncomeTaxRateReconciliationReversalOfUncertainTaxPositionsReserves	-8000000	usd
CY2021	nrg	Effective Income Tax Rate Reconciliation Reversal Of Uncertain Tax Positions Reserves EffectiveIncomeTaxRateReconciliationReversalOfUncertainTaxPositionsReserves	10000000	usd
CY2020	nrg	Effective Income Tax Rate Reconciliation Reversal Of Uncertain Tax Positions Reserves EffectiveIncomeTaxRateReconciliationReversalOfUncertainTaxPositionsReserves	-3000000	usd
CY2022	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	19000000	usd
CY2021	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	0	usd
CY2020	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	0	usd
CY2022	us-gaap	Income Tax Reconciliation Prior Year Income Taxes IncomeTaxReconciliationPriorYearIncomeTaxes	0	usd
CY2021	us-gaap	Income Tax Reconciliation Prior Year Income Taxes IncomeTaxReconciliationPriorYearIncomeTaxes	5000000	usd
CY2020	us-gaap	Income Tax Reconciliation Prior Year Income Taxes IncomeTaxReconciliationPriorYearIncomeTaxes	36000000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	442000000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	672000000	usd
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	251000000	usd
CY2022	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.266
CY2021	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.235
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.330
CY2022Q4	nrg	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Deferred Compensation Accrued Vacation And Other Reserves DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsDeferredCompensationAccruedVacationAndOtherReserves	93000000	usd
CY2021Q4	nrg	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Deferred Compensation Accrued Vacation And Other Reserves DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsDeferredCompensationAccruedVacationAndOtherReserves	114000000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Property Plant And Equipment DeferredTaxAssetsPropertyPlantAndEquipment	399000000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Property Plant And Equipment DeferredTaxAssetsPropertyPlantAndEquipment	436000000	usd
CY2022Q4	nrg	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions And Other Postretirement Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensionsAndOtherPostretirementBenefits	62000000	usd
CY2021Q4	nrg	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions And Other Postretirement Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensionsAndOtherPostretirementBenefits	65000000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	8000000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	7000000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Allowance For Doubtful Accounts DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts	33000000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Allowance For Doubtful Accounts DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts	168000000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Domestic DeferredTaxAssetsOperatingLossCarryforwardsDomestic	1717000000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Domestic DeferredTaxAssetsOperatingLossCarryforwardsDomestic	1773000000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Foreign DeferredTaxAssetsOperatingLossCarryforwardsForeign	104000000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Foreign DeferredTaxAssetsOperatingLossCarryforwardsForeign	112000000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	315000000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	328000000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	393000000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	384000000	usd
CY2022Q4	nrg	Deferred Tax Assets Federal Benefit On State Unrecognized Tax Benefits DeferredTaxAssetsFederalBenefitOnStateUnrecognizedTaxBenefits	5000000	usd
CY2021Q4	nrg	Deferred Tax Assets Federal Benefit On State Unrecognized Tax Benefits DeferredTaxAssetsFederalBenefitOnStateUnrecognizedTaxBenefits	3000000	usd
CY2022Q4	us-gaap	Deferred Tax Asset Interest Carryforward DeferredTaxAssetInterestCarryforward	65000000	usd
CY2021Q4	us-gaap	Deferred Tax Asset Interest Carryforward DeferredTaxAssetInterestCarryforward	6000000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Inventory DeferredTaxAssetsInventory	10000000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Inventory DeferredTaxAssetsInventory	9000000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Capital Loss Carryforwards DeferredTaxAssetsCapitalLossCarryforwards	15000000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Capital Loss Carryforwards DeferredTaxAssetsCapitalLossCarryforwards	0	usd
CY2022Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	22000000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	15000000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	3241000000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	3420000000	usd
CY2022Q4	nrg	Deferred Tax Liabilities Emissions Allowances DeferredTaxLiabilitiesEmissionsAllowances	19000000	usd
CY2021Q4	nrg	Deferred Tax Liabilities Emissions Allowances DeferredTaxLiabilitiesEmissionsAllowances	20000000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Derivatives DeferredTaxLiabilitiesDerivatives	874000000	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities Derivatives DeferredTaxLiabilitiesDerivatives	591000000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Goodwill DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsGoodwill	26000000	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Goodwill DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsGoodwill	40000000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	269000000	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	363000000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Investment In Noncontrolled Affiliates DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates	82000000	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities Investment In Noncontrolled Affiliates DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates	62000000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Deferred Financing Costs DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts	0	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Deferred Financing Costs DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts	14000000	usd
CY2022Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	1270000000	usd
CY2021Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	1090000000	usd
CY2022Q4	nrg	Deferred Tax Asset Net Of Deferred Tax Liability Before Valuation Allowance DeferredTaxAssetNetOfDeferredTaxLiabilityBeforeValuationAllowance	1971000000	usd
CY2021Q4	nrg	Deferred Tax Asset Net Of Deferred Tax Liability Before Valuation Allowance DeferredTaxAssetNetOfDeferredTaxLiabilityBeforeValuationAllowance	2330000000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	224000000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	248000000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	1747000000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	2082000000	usd
CY2022Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	1881000000	usd
CY2021Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	2155000000	usd
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CY2021Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	73000000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	1747000000	usd
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CY2021Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	2100000000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	1700000000	usd
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CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	13000000	usd
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CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	13000000	usd
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	15000000	usd
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CY2022	nrg	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Right To Receive Common Stock At End Of Deferral Period Shares ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsRightToReceiveCommonStockAtEndOfDeferralPeriodShares	1	shares
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CY2022	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	34000000	usd
CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	27000000	usd
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	27000000	usd
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CY2022Q4	nrg	Nuclear Insurance Per Incident Coverage Limit NuclearInsurancePerIncidentCoverageLimit	13700000000	usd
CY2022Q4	nrg	Nuclear Insurance Requirement Per Site NuclearInsuranceRequirementPerSite	450000000	usd
CY2022Q4	nrg	Nuclear Insurance Financial Protection Pool Value NuclearInsuranceFinancialProtectionPoolValue	13200000000	usd
CY2022Q4	nrg	Nuclear Insurance Financial Protection Pool Maximum Assessment NuclearInsuranceFinancialProtectionPoolMaximumAssessment	138000000	usd
CY2022Q4	nrg	Nuclear Insurance Financial Protection Pool Maximum Assessment Administrative Fee As A Percent NuclearInsuranceFinancialProtectionPoolMaximumAssessmentAdministrativeFeeAsAPercent	0.05
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CY2022Q4	nrg	Nuclear Insurance Per Incident Coverage Limit NuclearInsurancePerIncidentCoverageLimit	13700000000	usd
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CY2022Q4	nrg	Mutual Property Insurance Individual Maximum Property Coverage Limit MutualPropertyInsuranceIndividualMaximumPropertyCoverageLimit	1500000000	usd
CY2022Q4	nrg	Number Of Nuclear Reactors With Shared Single Limit Nuclear Property Insurance NumberOfNuclearReactorsWithSharedSingleLimitNuclearPropertyInsurance	2	nuclearreactor
CY2022Q4	nrg	Mutual Lost Revenue Insurance Maximum Weekly Recovery MutualLostRevenueInsuranceMaximumWeeklyRecovery	3000000	usd
CY2022Q4	nrg	Additional Mutual Lost Revenue Insurance Weekly Maximum AdditionalMutualLostRevenueInsuranceWeeklyMaximum	2000000	usd
CY2022	nrg	Number Of Years Board Of Directors Of Industry Mutual Insurance Company Can Adjust Policy After Policy Expires NumberOfYearsBoardOfDirectorsOfIndustryMutualInsuranceCompanyCanAdjustPolicyAfterPolicyExpires	P6Y
CY2022Q4	nrg	Environmental Proceedings Disclosure Threshold EnvironmentalProceedingsDisclosureThreshold	1000000	usd
CY2021Q4	nrg	Number Of Facilities NumberOfFacilities	2	facility
CY2022	us-gaap	Interest Paid Net InterestPaidNet	383000000	usd
CY2021	us-gaap	Interest Paid Net InterestPaidNet	433000000	usd
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CY2022	nrg	Increase Decrease Capital Expenditures Incurred But Not Yet Paid IncreaseDecreaseCapitalExpendituresIncurredButNotYetPaid	-68000000	usd
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CY2022Q4	nrg	Guarantee Maturity Less Than One Year GuaranteeMaturityLessThanOneYear	5481000000	usd
CY2022Q4	nrg	Guarantee Maturity Between One To Three Years GuaranteeMaturityBetweenOneToThreeYears	25000000	usd
CY2022Q4	nrg	Guarantee Maturity Between Three To Five Years GuaranteeMaturityBetweenThreeToFiveYears	34000000	usd
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CY2021Q4	nrg	Guarantee Obligations Estimated Exposure GuaranteeObligationsEstimatedExposure	4602000000	usd

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$NRG
NRG Energy Inc Stock $nrg

2023 Q1 Form 10-K Financial Statement

#000101387123000004 Filed on February 23, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NRG NRG Energy Inc Stock $nrg

2023 Q1 Form 10-K Financial Statement

#000101387123000004 Filed on February 23, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NRG
NRG Energy Inc Stock $nrg