XML 92 R81.htm IDEA: XBRL DOCUMENT v3.22.2.2

Environmental Matters (Details)	Oct. 31, 2021 facility
Commitments and Contingencies Disclosure [Abstract]
Number of plants	2

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

- References

No definition available.

+ Details

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