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Segment Information (Tables)

12 Months Ended

Dec. 31, 2020

Segment Reporting [Abstract]

Summary of Segments

The following tables present summarized financial information for PNMR by segment. PNM and TNMP each operate in only one segment. Therefore, tabular segment information is not presented for PNM and TNMP.

2020			PNM						TNMP						Corporate and Other						PNMR Consolidated
			(In thousands)
Electric operating revenues			$	1,139,834					$	383,178					$	—					$	1,523,012
Cost of energy			345,167						102,074						—						447,241
Utility margin			794,667						281,104						—						1,075,771
Other operating expenses			414,445						104,852						(4,419)						514,878
Depreciation and amortization			165,325						87,799						22,488						275,612
Operating income (loss)			214,897						88,453						(18,069)						285,281
Interest income			14,469						—						(246)						14,223
Other income (deductions)			17,120						6,828						(1,108)						22,840
Interest charges			(64,615)						(30,388)						(19,389)						(114,392)
Segment earnings (loss) before income taxes			181,871						64,893						(38,812)						207,952
Income taxes (benefit)			21,857						6,308						(7,529)						20,636
Segment earnings (loss)			160,014						58,585						(31,283)						187,316
Valencia non-controlling interest			(14,013)						—						—						(14,013)
Subsidiary preferred stock dividends			(528)						—						—						(528)
Segment earnings (loss) attributable to PNMR			$	145,473					$	58,585					$	(31,283)					$	172,775
At December 31, 2020:
Total Assets			$	5,581,033					$	2,132,580					$	226,241					$	7,939,854
Goodwill			$	51,632					$	226,665					$	—					$	278,297

2019			PNM						TNMP						Corporate and Other						PNMR Consolidated
			(In thousands)
Electric operating revenues			$	1,093,822					$	363,781					$	—					$	1,457,603
Cost of energy			317,725						95,087						—						412,812
Utility margin			776,097						268,694						—						1,044,791
Other operating expenses			554,661						98,621						(20,499)						632,783
Depreciation and amortization			160,368						84,259						23,181						267,808
Operating income			61,068						85,814						(2,682)						144,200
Interest income			14,303						—						(281)						14,022
Other income (deductions)			26,989						4,131						(1,477)						29,643
Interest charges			(72,900)						(29,100)						(19,016)						(121,016)
Segment earnings (loss) before income taxes			29,460						60,845						(23,456)						66,849
Income taxes			(25,962)						5,046						(4,366)						(25,282)
Segment earnings (loss)			55,422						55,799						(19,090)						92,131
Valencia non-controlling interest			(14,241)						—						—						(14,241)
Subsidiary preferred stock dividends			(528)						—						—						(528)
Segment earnings (loss) attributable to PNMR			$	40,653					$	55,799					$	(19,090)					$	77,362
At December 31, 2019:
Total Assets			$	5,242,991					$	1,860,439					$	195,344					$	7,298,774
Goodwill			$	51,632					$	226,665					$	—					$	278,297

2018			PNM						TNMP												Corporate and Other						PNMR Consolidated
			(In thousands)
Electric operating revenues			$	1,091,965					$	344,648											$	—					$	1,436,613
Cost of energy			314,036						85,690												—						399,726
Utility margin			777,929						258,958												—						1,036,887
Other operating expenses			481,030						96,272												(17,650)						559,652
Depreciation and amortization			151,866						66,189												23,133						241,188
Operating income (loss)			145,033						96,497												(5,483)						236,047
Interest income			13,089						—												2,451						15,540
Other income (deductions)			(17,312)						4,065												(2,039)						(15,286)
Interest charges			(76,458)						(32,091)												(18,695)						(127,244)
Segment earnings (loss) before income taxes			64,352						68,471												(23,766)						109,057
Income taxes (benefit)			(5,971)						16,880												(3,134)						7,775
Segment earnings (loss)			70,323						51,591												(20,632)						101,282
Valencia non-controlling interest			(15,112)						—												—						(15,112)
Subsidiary preferred stock dividends			(528)						—												—						(528)
Segment earnings (loss) attributable to PNMR			$	54,683					$	51,591											$	(20,632)					$	85,642
At December 31, 2018:
Total Assets			$	5,035,883					$	1,665,177											$	164,491					$	6,865,551
Goodwill			$	51,632					$	226,665											$	—					$	278,297

Schedule of Major Customers

Three REPs accounted for more than 10% of the electric operating revenues of TNMP, as follows:

			Year Ended December 31,
			2020						2019						2018
REP A			21		%				22		%				21		%
REP B			18		%				17		%				15		%
REP C			11		%				12		%				12		%

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Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

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