Consolidated Balance Sheets - PNM - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Current Assets:
Cash and cash equivalents	$ 2,215	$ 4,078
Accounts receivable, net of allowance for credit losses of $3,388 and $4,925	126,291	183,669
Unbilled revenues	64,072	63,473
Other receivables	76,509	20,320
Materials, supplies, and fuel stock	98,034	66,733
Regulatory assets	73,046	20,265
Prepaid assets	19,759	18,465
Income taxes receivable	6,697	2,351
Other current assets	8,920	31,624
Total current assets	475,543	410,978
Other Property and Investments:
Investment securities	444,408	417,476
Other investments	171	177
Non-utility property, including financing leases	29,367	26,841
Total other property and investments	593,516	535,114
Utility Plant:
Plant in service, held for future use, and to be abandoned	9,701,180	9,164,564
Less accumulated depreciation and amortization	2,755,823	2,659,952
Net plant in service and plant held for future use	6,945,357	6,504,612
Construction work in progress	589,834	372,988
Nuclear fuel, net of accumulated amortization of $35,840 and $43,985	74,671	95,223
Net utility plant	7,609,862	6,972,823
Deferred Charges and Other Assets:
Regulatory assets	914,381	846,686
Goodwill	278,297	278,297
Operating lease assets, net of amortization	182,201	55,982
Other deferred charges	198,805	157,497
Total deferred charges and other assets	1,573,684	1,338,462
Total assets	10,252,605	9,257,377
Current Liabilities:
Short-term debt	261,900	232,000
Current installments of long-term debt (includes $2,529 and $0 related to ETBC I)	280,169	184,793
Accounts payable	205,175	215,708
Customer deposits	6,237	6,117
Accrued interest and taxes	98,655	76,783
Regulatory liabilities	140,005	17,002
Operating lease liabilities	12,267	18,781
Dividends declared	35,085	31,676
Transmission interconnection arrangement liabilities	96,870	20,473
Other current liabilities	94,397	87,037
Total current liabilities	1,230,760	890,370
Long-term Debt, net of Unamortized Premiums, Discounts, and Debt Issuance Costs (includes $338,521 and $0 related to ETBC I)	4,241,642	3,892,594
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	845,280	822,831
Regulatory liabilities	771,317	755,202
Asset retirement obligations	245,531	223,377
Accrued pension liability and postretirement benefit cost	21,429	32,799
Operating lease liabilities	167,000	41,336
Other deferred credits	319,066	342,413
Total deferred credits and other liabilities	2,369,623	2,217,958
Total liabilities	7,842,025	7,000,922
Commitments and Contingencies (See Note 16)
Cumulative Preferred Stock of Subsidiary without mandatory redemption requirements ($100 stated value; 10,000,000 shares authorized; issued and outstanding 115,293 shares)	11,529	11,529
Company common stockholders’ equity:
Common stock (no par value; 120,000,000 shares authorized; issued and outstanding 90,200,384 and 85,834,874 shares)	1,624,823	1,429,102
Accumulated other comprehensive income (loss), net of income taxes	(62,840)	(66,048)
Retained earnings	787,110	828,878
Total PNMR common stockholders’ equity	2,349,093	2,191,932
Non-controlling interest in Valencia	49,958	52,994
Total equity	2,399,051	2,244,926
Total liabilities and stockholders' equity	10,252,605	9,257,377
PNM
Current Assets:
Cash and cash equivalents	858	2,985
Accounts receivable, net of allowance for credit losses of $3,388 and $4,925	94,879	151,386
Unbilled revenues	46,925	45,282
Materials, supplies, and fuel stock	81,572	55,890
Regulatory assets	72,996	18,333
Prepaid assets	9,941	10,085
Income taxes receivable	7,682	18,233
Other current assets	1,756	20,706
Total current assets	377,837	345,645
Other Property and Investments:
Investment securities	444,408	417,476
Other investments	69	76
Non-utility property, including financing leases	13,538	11,695
Total other property and investments	458,015	429,247
Utility Plant:
Plant in service, held for future use, and to be abandoned	6,151,510	6,007,464
Less accumulated depreciation and amortization	1,976,657	1,908,644
Net plant in service and plant held for future use	4,174,853	4,098,820
Construction work in progress	490,178	300,772
Nuclear fuel, net of accumulated amortization of $35,840 and $43,985	74,671	95,223
Net utility plant	4,739,702	4,494,815
Deferred Charges and Other Assets:
Regulatory assets	838,727	763,941
Goodwill	51,632	51,632
Operating lease assets, net of amortization	180,370	52,556
Other deferred charges	166,782	134,330
Total deferred charges and other assets	1,237,511	1,002,459
Total assets	6,813,065	6,272,166
Current Liabilities:
Short-term debt	137,500	185,900
Current installments of long-term debt (includes $2,529 and $0 related to ETBC I)	200,222	184,793
Customer deposits	6,237	6,117
Accrued interest and taxes	41,337	35,797
Regulatory liabilities	134,846	7,913
Operating lease liabilities	11,371	17,239
Dividends declared	132	132
Transmission interconnection arrangement liabilities	96,870	20,473
Other current liabilities	52,587	55,350
Total current liabilities	839,194	692,155
Long-term Debt, net of Unamortized Premiums, Discounts, and Debt Issuance Costs (includes $338,521 and $0 related to ETBC I)	2,061,558	1,816,107
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	684,037	682,040
Regulatory liabilities	565,021	556,989
Asset retirement obligations	244,633	222,549
Accrued pension liability and postretirement benefit cost	19,949	32,007
Operating lease liabilities	166,191	39,633
Other deferred credits	220,178	258,833
Total deferred credits and other liabilities	1,900,009	1,792,051
Total liabilities	4,800,761	4,300,313
Commitments and Contingencies (See Note 16)
Cumulative Preferred Stock of Subsidiary without mandatory redemption requirements ($100 stated value; 10,000,000 shares authorized; issued and outstanding 115,293 shares)	11,529	11,529
Company common stockholders’ equity:
Common stock (no par value; 120,000,000 shares authorized; issued and outstanding 90,200,384 and 85,834,874 shares)	1,547,918	1,547,918
Accumulated other comprehensive income (loss), net of income taxes	(66,505)	(74,335)
Retained earnings	469,404	433,747
Total PNMR common stockholders’ equity	1,950,817	1,907,330
Non-controlling interest in Valencia	49,958	52,994
Total equity	2,000,775	1,960,324
Total liabilities and stockholders' equity	6,813,065	6,272,166
PNM | Nonrelated Party
Current Assets:
Other receivables	51,975	13,877
Current Liabilities:
Accounts payable	141,704	163,522
PNM | Related Party
Current Assets:
Other receivables	9,253	8,868
Current Liabilities:
Accounts payable	$ 16,388	$ 14,919