XML 104 R86.htm IDEA: XBRL DOCUMENT
v3.22.4

Accounting for Derivative Instruments and Hedging Activities - Pre-tax Effects of Economic Hedges not Designated as Cash Flow Hedges (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Unrealized Mark To Market Results [Abstract] |  |  |
Reversal of previously recognized unrealized (gains) on settled positions related to economic hedges | $ (1,232) | $ (41) | $ (55)
Reversal of acquired loss positions related to economic hedges | 2 | 256 | 4
Total unrealized mark-to-market gains/(losses) for economic hedging activities | 1,248 | 2,716 | (119)
Reversal of previously recognized unrealized losses/(gains) on settled positions related to trading activity | 13 | (18) | (20)
Reversal of Acquired (gain) Positions Related to Trading Activity | 0 | (1) | 0
Net unrealized (losses)/gains on open positions related to trading activity | (17) | (13) | 15
Total unrealized mark-to-market (losses) for trading activity | (4) | (32) | (5)
Total unrealized gains/(losses) | 1,244 | 2,684 | (124)
Credit Risk Related Contingent Features [Abstract] |  |  |
Collateral required contracts with credit rating contingent features in a net liability position | 195 |  |
Additional collateral required | 30 |  |
Adequate Assurance Clauses |  |  |
Credit Risk Related Contingent Features [Abstract] |  |  |
Collateral required for contracts in net liability positions that have adequate assurance clauses | 1,500 |  |
Not Designated as Hedging Instrument, Economic Hedge |  |  |
Unrealized Mark To Market Results [Abstract] |  |  |
Net unrealized gains/(losses) on open positions related to economic hedges | 2,478 | 2,501 | (68)
Commodity contracts |  |  |
Unrealized Mark To Market Results [Abstract] |  |  |
Total unrealized gains/(losses) | 1,244 | 2,684 | (124)
Commodity contracts | Operating revenue |  |  |
Unrealized Mark To Market Results [Abstract] |  |  |
Total unrealized gains/(losses) | (87) | (196) | 90
Commodity contracts | Cost of operations |  |  |
Unrealized Mark To Market Results [Abstract] |  |  |
Total unrealized gains/(losses) | 1,315 | 2,880 | (214)
Foreign exchange contract | Cost of operations |  |  |
Unrealized Mark To Market Results [Abstract] |  |  |
Total unrealized gains/(losses) | $ 16 | $ 0 | $ 0

X
- Definition -- None. No documentation exists for this element. -- + References No definition available. + Details
Name: | nrg_CreditRiskRelatedContingentFeaturesAbstract
Namespace Prefix: | nrg_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition This element represents the amount recorded in the entity's statement of operations for net unrealized gains (losses) on open positions related to trading activities. + References No definition available. + Details
Name: | nrg_DerivativeUnrealizedGainsOnOpenPositionsRelatedToTradingActivityNet
Namespace Prefix: | nrg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Reversal of Acquired (gain) Positions Related to Trading Activity + References No definition available. + Details
Name: | nrg_ReversalOfAcquiredGainPositionsRelatedToTradingActivity
Namespace Prefix: | nrg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount reversed into entity's statement of operations for previously recognized unrealized (gains) losses on settled positions related to acquired economic hedges. + References No definition available. + Details
Name: | nrg_ReversalPreviouslyRecognizedUnrealizedGainsLossesAcquiredasPartofAcquisitionEconomicHedges
Namespace Prefix: | nrg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount reversed into entity's statement of operations for previously recognized unrealized (gains) losses on settled positions related to economic hedges. + References No definition available. + Details
Name: | nrg_ReversalPreviouslyRecognizedUnrealizedGainsLossesSettledPositionsEconomicHedges
Namespace Prefix: | nrg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount reversed into entity's statement of operations for previously recognized unrealized (gains) losses on settled positions related to trading activities. + References No definition available. + Details
Name: | nrg_ReversalPreviouslyUnrecognizedUnrealizedGainsLossesSettledPositionsTradingActivity
Namespace Prefix: | nrg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Unrealized Gain (Loss) on Derivatives, Mark To Market, Economic Hedging Activities + References No definition available. + Details
Name: | nrg_UnrealizedGainLossOnDerivativesMarkToMarketEconomicHedgingActivities
Namespace Prefix: | nrg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Unrealized Gain (Loss) on Derivatives, Mark To Market, Trading Activities + References No definition available. + Details
Name: | nrg_UnrealizedGainLossonDerivativesMarkToMarketTradingActivities
Namespace Prefix: | nrg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition -- None. No documentation exists for this element. -- + References No definition available. + Details
Name: | nrg_UnrealizedMarkToMarketResultsAbstract
Namespace Prefix: | nrg_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The aggregate fair value of additional assets that would be required to be posted as collateral for derivative instruments with credit-risk-related contingent features if the credit-risk-related contingent features were triggered at the end of the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4H -Subparagraph (e) -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5624258-113959 + Details
Name: | us-gaap_AdditionalCollateralAggregateFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The aggregate fair value of assets that are already posted, at the end of the reporting period, as collateral for derivative instruments with credit-risk-related contingent features. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4H -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5624258-113959 + Details
Name: | us-gaap_CollateralAlreadyPostedAggregateFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The aggregate fair value amounts of derivative instruments that contain credit-risk-related contingent features that are in a net liability position at the end of the reporting period. For nonderivative instruments that are designated and qualify as hedging instruments, the fair value amounts are the carrying value of the nonderivative hedging instrument, including the adjustment for the foreign currency transaction gain (loss) on that instrument. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4H -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5624258-113959 + Details
Name: | us-gaap_DerivativeNetLiabilityPositionAggregateFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of open derivatives, commodity, or energy contracts, held at each balance sheet date, that was included in earnings for the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585 + Details
Name: | us-gaap_UnrealizedGainLossOnDerivativesAndCommodityContracts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of open agreements to purchase or sell energy at some future point, held at each balance sheet date, that was included in earnings for the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585 + Details
Name: | us-gaap_UnrealizedGainLossOnEnergyContracts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_CreditDerivativesByContractTypeAxis=nrg_AdequateAssuranceClausesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_HedgingDesignationAxis=us-gaap_NotDesignatedAsHedgingInstrumentEconomicHedgeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_CommodityContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_SalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_CostOfSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_ForeignExchangeContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |