XML 95 R79.htm IDEA: XBRL DOCUMENT v3.23.2

Commitments and Contingencies - Santa Fe Generating Station (Details)			24 Months Ended
	Jul. 20, 2020 numberOfAMIMeter	Jan. 01, 2020 numberOfAMIMeter	Dec. 31, 2014 monitoringWell
Commitments and Contingencies Disclosure [Abstract]
Number of field work reports | numberOfAMIMeter	2	2
Number of monitoring wells containing free-phase hydrocarbon products | monitoringWell			1

X

- Definition

Number Of Field Work Reports

+ References

No definition available.

+ Details

Name:	pnm_NumberOfFieldWorkReports
Namespace Prefix:	pnm_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number Of Monitoring Wells Containing Free-Phase Hydrocarbon Products

+ References

No definition available.

+ Details

Name:	pnm_NumberOfMonitoringWellsContainingFreePhaseHydrocarbonProducts
Namespace Prefix:	pnm_
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