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Financing, Financing Activities (Details) (USD $)												3 Months Ended			3 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014 Public Service Company of New Mexico [Member]	Dec. 31, 2013 Public Service Company of New Mexico [Member]	Jun. 30, 2014 Local Lines of Credit [Member] Public Service Company of New Mexico [Member]	Jan. 08, 2014 Local Lines of Credit [Member] Public Service Company of New Mexico [Member]	Dec. 31, 2013 Local Lines of Credit [Member] Public Service Company of New Mexico [Member]	Jun. 30, 2014 PNMR Term Loan Agreement [Member]	Dec. 31, 2013 PNMR Term Loan Agreement [Member]	Jun. 30, 2014 PNM 2014 Term Loan Agreement [Member] Public Service Company of New Mexico [Member]	Mar. 05, 2014 PNM 2014 Term Loan Agreement [Member] Public Service Company of New Mexico [Member]	Jun. 30, 2014 2011 Term Loan Agreement, First Mortgage Bonds Due 2014 [Member] Texas-New Mexico Power Company [Member]	Dec. 09, 2013 Bonds [Member] First Mortgage Bonds Due 2024, Series 2014A, at 4 point 03 percent [Member] [Member] Texas-New Mexico Power Company [Member]	Mar. 06, 2013 First Mortgage Bonds [Member] First Mortgage Bonds, due 2043, Series 2013A [Member] Texas-New Mexico Power Company [Member]	Jun. 30, 2014 Notes Payable to Banks [Member] Texas-New Mexico Power Company [Member]	Apr. 22, 2013 Notes Payable to Banks [Member] PNM Term Loan Agreement [Member]
Debt Instrument [Line Items]
Long-term Debt											$ 175,000,000
Debt Instrument, Face Amount													80,000,000
Debt Instrument, Interest Rate, Stated Percentage													4.03%
Proceeds from Bank Debt												50,000,000			30,000,000
Debt Instrument, Cash for Bond Exchange Conversion														0.14
Short-term debt	105,000,000	149,200,000	0	49,200,000	0		0	100,000,000	100,000,000							75,000,000
Debt Instrument, Interest Rate at Period End										1.10%
Debt Instruments, NMPRC Approved credit facility						$ 50,000,000

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Debt Instrument, Cash for Bond Exchange Conversion

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Debt Instruments, NMPRC Approved credit faciltiy

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Face (par) amount of debt instrument at time of issuance.

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-Name Accounting Standards Codification

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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The cash inflow from bank borrowing during the year.

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