Consolidated Statements of Cash Flows - PNM - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash Flows From Operating Activities:
Net Earnings	$ 185,180,000	$ 211,847,000	$ 187,316,000
Adjustments to reconcile net earnings to net cash flows from operating activities:
Depreciation and amortization	341,123,000	320,210,000	314,668,000
Deferred income tax expense	24,533,000	30,747,000	20,405,000
(Gains) losses on investment securities	78,357,000	(16,850,000)	(21,599,000)
Regulatory disallowances and restructuring costs	832,000	1,194,000	1,098,000
Allowance for equity funds used during construction	(13,799,000)	(13,217,000)	(11,254,000)
Other, net	2,377,000	5,457,000	3,497,000
Changes in certain assets and liabilities:
Accounts receivable and unbilled revenues	(73,099,000)	(25,924,000)	(42,035,000)
Materials, supplies, and fuel stock	(8,528,000)	1,356,000	11,512,000
Other current assets	17,159,000	1,838,000	(8,135,000)
Other assets	5,002,000	31,135,000	29,923,000
Accounts payable	47,568,000	10,640,000	7,403,000
Accrued interest and taxes	9,205,000	2,692,000	(9,347,000)
Other current liabilities	(28,516,000)	6,894,000	23,740,000
Other liabilities	(27,935,000)	(29,592,000)	(29,633,000)
Net cash flows from operating activities	567,284,000	547,873,000	485,700,000
Cash Flows From Investing Activities:
Additions to utility and non-utility plant	(912,557,000)	(935,016,000)	(679,028,000)
Proceeds from sales of investment securities	526,448,000	459,867,000	590,998,000
Purchases of investment securities	(564,912,000)	(477,672,000)	(607,591,000)
Other, net	674,000	(9,000)	(14,928,000)
Net cash flows used in investing activities	(950,347,000)	(952,258,000)	(733,799,000)
Cash Flows From Financing Activities:
Revolving credit facilities borrowings (repayments), net	169,300,000	30,700,000	(153,100,000)
Long-term borrowings	558,000,000	1,816,345,000	1,267,845,000
Repayment of long-term debt	(179,500,000)	(1,411,345,000)	(977,845,000)
Dividends paid	(119,839,000)	(112,972,000)	(98,502,000)
Valencia’s transactions with its owner	(17,533,000)	(19,094,000)	(18,056,000)
Transmission interconnection and security deposit arrangements	96,550,000	80,558,000	11,452,000
Refunds paid under transmission interconnection arrangements	(107,397,000)	(10,195,000)	(5,905,000)
Debt issuance costs and other, net	(5,564,000)	(6,306,000)	(4,943,000)
Net cash flows from financing activities	386,037,000	357,561,000	292,194,000
Change in Cash and Cash Equivalents	2,974,000	(46,824,000)	44,095,000
Cash and Cash Equivalents at Beginning of Year	1,104,000	47,928,000	3,833,000
Cash and Cash Equivalents at End of Year	4,078,000	1,104,000	47,928,000
Supplemental Cash Flow Disclosures:
Interest paid, net of amounts capitalized	118,485,000	91,276,000	106,575,000
Income taxes paid (refunded), net	(1,011,000)	1,042,000	969,000
Supplemental schedule of noncash investing and financing activities:
(Increase) decrease in accrued plant additions	4,455,000	7,362,000	(58,796,000)
Public Service Company of New Mexico
Cash Flows From Operating Activities:
Net Earnings	119,020,000	171,559,000	160,014,000
Adjustments to reconcile net earnings to net cash flows from operating activities:
Depreciation and amortization	213,517,000	203,401,000	198,418,000
Deferred income tax expense	29,487,000	27,120,000	22,442,000
(Gains) losses on investment securities	78,357,000	(16,850,000)	(21,599,000)
Regulatory disallowances and restructuring costs	832,000	1,194,000	1,098,000
Allowance for equity funds used during construction	(9,323,000)	(9,905,000)	(6,958,000)
Other, net	3,758,000	4,482,000	4,950,000
Changes in certain assets and liabilities:
Accounts receivable and unbilled revenues	(60,743,000)	(24,757,000)	(41,340,000)
Materials, supplies, and fuel stock	(4,804,000)	2,531,000	11,753,000
Other current assets	17,956,000	2,154,000	(2,718,000)
Other assets	5,487,000	30,187,000	24,882,000
Accounts payable	48,868,000	9,836,000	6,267,000
Accrued interest and taxes	(19,574,000)	20,214,000	(11,572,000)
Other current liabilities	(41,876,000)	9,169,000	16,682,000
Other liabilities	(26,029,000)	(37,884,000)	(36,556,000)
Net cash flows from operating activities	354,933,000	392,451,000	325,763,000
Cash Flows From Investing Activities:
Additions to utility and non-utility plant	(433,459,000)	(602,180,000)	(335,055,000)
Proceeds from sales of investment securities	526,448,000	459,867,000	590,998,000
Purchases of investment securities	(564,912,000)	(477,672,000)	(607,591,000)
Other, net	439,000	(9,000)	(14,942,000)
Net cash flows used in investing activities	(471,484,000)	(619,994,000)	(366,590,000)
Cash Flows From Financing Activities:
Revolving credit facilities borrowings (repayments), net	178,500,000	(2,600,000)	(48,000,000)
Long-term borrowings	298,000,000	631,345,000	852,845,000
Repayment of long-term debt	(179,500,000)	(446,345,000)	(902,845,000)
Equity contribution from parent	0	53,000,000	230,000,000
Dividends paid	(154,028,000)	(60,528,000)	(41,181,000)
Valencia’s transactions with its owner	(17,533,000)	(19,094,000)	(18,056,000)
Transmission interconnection and security deposit arrangements	90,150,000	47,858,000	4,050,000
Refunds paid under transmission interconnection arrangements	(93,247,000)	(2,893,000)	(5,905,000)
Debt issuance costs and other, net	(2,825,000)	(4,627,000)	364,000
Net cash flows from financing activities	119,517,000	196,116,000	71,272,000
Change in Cash and Cash Equivalents	2,966,000	(31,427,000)	30,445,000
Cash and Cash Equivalents at Beginning of Year	19,000	31,446,000	1,001,000
Cash and Cash Equivalents at End of Year	2,985,000	19,000	31,446,000
Supplemental Cash Flow Disclosures:
Interest paid, net of amounts capitalized	54,816,000	45,729,000	60,663,000
Income taxes paid (refunded), net	11,602,000	(19,492,000)	0
Supplemental schedule of noncash investing and financing activities:
(Increase) decrease in accrued plant additions	$ (6,859,000)	$ 23,091,000	$ (48,037,000)