XML 99 R83.htm IDEA: XBRL DOCUMENT
v3.25.2

Environmental Matters (Details) $ in Millions | 6 Months Ended |
--- | --- | ---
Jun. 30, 2025 USD ($) state facility | Dec. 31, 2022 facility
Commitments and Contingencies Disclosure [Abstract] |  |
Environmental proceedings, disclosure threshold | $ | $ 1 |
Number of plants | facility | 2 | 2
Number of states challenging the EPA's rule | state | 23 |

X
- Definition Environmental Proceedings, Disclosure Threshold + References No definition available. + Details
Name: | nrg_EnvironmentalProceedingsDisclosureThreshold
Namespace Prefix: | nrg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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 Number Of States Challenging The Environmental Protection Agency's Mercury And Air Toxics Standards + References No definition available. + Details
Name: | nrg_NumberOfStatesChallengingTheEnvironmentalProtectionAgencysMercuryAndAirToxicsStandards
Namespace Prefix: | nrg_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration