XML 42 R79.htm IDEA: XBRL DOCUMENT v3.20.1

Commitments and Contingencies (Details) $ in Millions	Mar. 31, 2020 case	Dec. 31, 2018 facility	Aug. 18, 2016 USD ($)
Sierra Club Et Al V. Midwest Generation LLC
Loss Contingencies
Number of facilities | facility		4
XOOM Energy Litigation
Loss Contingencies
Pending lawsuits | case	2
Lignite Contract With Texas Westmoreland Coal Co.
Loss Contingencies
Bond obligation | $			$ 99

X

- Definition

Number of Facilities

+ References

No definition available.

+ Details

Name:	nrg_NumberOfFacilities
Namespace Prefix:	nrg_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Third Party Bond Obligation

+ References

No definition available.

+ Details

Name:	nrg_ThirdPartyBondObligation
Namespace Prefix:	nrg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_LossContingenciesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of pending claims pertaining to a loss contingency.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118942415&loc=d3e14435-108349

+ Details

Name:	us-gaap_LossContingencyPendingClaimsNumber
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	srt_LitigationCaseAxis=nrg_SierraClubEtAlV.MidwestGenerationLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_LitigationCaseAxis=nrg_XOOMEnergyLitigationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis=nrg_LigniteContractWithTexasWestmorelandCoalCo.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: