XML 30 R36.htm IDEA: XBRL DOCUMENT v3.19.3

Regulatory and Rate Matters (Tables)

9 Months Ended

Sep. 30, 2019

Regulated Operations [Abstract]

Schedule of Rate Increases for Transmission Costs

The following sets forth TNMP’s recent interim transmission cost rate increases:

Effective Date		Approved Increase in Rate Base				Annual Increase in Revenue
		(In millions)
March 14, 2017		$	30.2			$	4.8
September 13, 2017		27.5				4.7
March 27, 2018		32.0				0.6
March 21, 2019		111.8				14.3

X

- Definition

Schedule of Rate Increases for Transmission Costs [Table Text Block]

+ References

No definition available.

+ Details

Name:	pnm_ScheduleofRateIncreasesforTransmissionCostsTableTextBlock
Namespace Prefix:	pnm_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

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