$TXNM
TXNM ENERGY INC Stock $txnm

$txnm Overview Financials Valuation SEC Filings Company Website

2019 Q1 Form 10-K Financial Statement

#000110842620000014 Filed on March 02, 2020

Income Statement

Concept	2019 Q1	2018 Q4	2018 Q3
Revenue	$349.6M	$343.8M	$422.7M
YoY Change	9.99%	3.35%	0.66%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin	$52.30M	$46.90M	$50.00M
YoY Change	8.28%	3.53%	13.38%
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$73.95M	$68.20M	$70.40M
YoY Change	9.15%	0.44%	2.92%
% of Gross Profit
Operating Expenses	$311.6M	$295.8M	$296.2M
YoY Change	14.69%	9.64%	7.59%
Operating Profit	$36.72M	-$17.40M	$128.0M
YoY Change	-20.4%	-175.88%	-10.17%
Interest Expense	$31.63M	-$45.00M	$30.49M
YoY Change	-4.3%	54.11%	-5.03%
% of Operating Profit	86.14%		23.82%
Other Income/Expense, Net	$3.252M	-$200.0K	$2.624M
YoY Change	136.34%	-90.0%	-60.89%
Pretax Income	$22.89M	-$62.60M	$104.5M
YoY Change	16.87%	-1460.87%	-13.71%
Income Tax	$1.223M	-$14.00M	$12.90M
% Of Pretax Income	5.34%		12.35%
Net Earnings	$18.70M	-$55.08M	$87.52M
YoY Change	24.75%	1.46%	18.69%
Net Earnings / Revenue	5.35%	-16.02%	20.71%
Basic Earnings Per Share	$0.23	-$0.70	$1.10
Diluted Earnings Per Share	$0.23	-$0.69	$1.09
COMMON SHARES
Basic Shares Outstanding	79.89M shares	79.65M shares	79.87M shares
Diluted Shares Outstanding	79.97M shares		79.98M shares

Balance Sheet

Concept	2019 Q1	2018 Q4	2018 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$180.1M	$2.100M	$35.00M
YoY Change	4639.47%	-47.5%	-18.79%
Cash & Equivalents	$180.1M	$2.122M	$34.96M
Short-Term Investments
Other Short-Term Assets	$53.86M	$54.81M	$53.07M
YoY Change	16.11%	15.73%	-5.94%
Inventory	$68.01M	$71.83M	$75.23M
Prepaid Expenses
Receivables	$94.62M	$92.80M	$108.6M
Other Receivables	$21.50M	$19.30M	$29.90M
Total Short-Term Assets	$457.1M	$302.5M	$363.9M
YoY Change	64.83%	2.75%	-2.83%
LONG-TERM ASSETS
Property, Plant & Equipment	$5.447B	$5.238B	$5.167B
YoY Change	8.17%	5.1%	1.41%
Goodwill	$278.3M	$278.3M	$278.3M
YoY Change	0.0%	0.0%	0.0%
Intangibles
YoY Change
Long-Term Investments	$33.53M	$26.56M	$26.03M
YoY Change	55.65%	60.9%	-91.52%
Other Assets	$683.4M	$691.6M	$681.4M
YoY Change	-1.5%	-0.66%	15.86%
Total Long-Term Assets	$6.794B	$6.563B	$6.485B
YoY Change	6.17%	3.33%	2.57%
TOTAL ASSETS
Total Short-Term Assets	$457.1M	$302.5M	$363.9M
Total Long-Term Assets	$6.794B	$6.563B	$6.485B
Total Assets	$7.251B	$6.866B	$6.849B
YoY Change	8.6%	3.3%	2.27%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$77.89M	$112.2M	$72.57M
YoY Change	-0.68%	-7.59%	-19.26%
Accrued Expenses	$97.50M	$65.20M	$80.20M
YoY Change	28.8%	4.49%	-3.72%
Deferred Revenue	$10.75M	$10.70M	$10.83M
YoY Change		-3.02%
Short-Term Debt	$223.8M	$235.9M	$262.6M
YoY Change	-6.24%	-22.76%	-1.46%
Long-Term Debt Due	$172.3M	$0.00	$471.9M
YoY Change	-44.34%	-100.0%	185.45%
Total Short-Term Liabilities	$664.1M	$512.5M	$980.5M
YoY Change	-15.15%	-38.68%	37.92%
LONG-TERM LIABILITIES
Long-Term Debt	$2.772B	$2.670B	$2.143B
YoY Change	22.01%	22.44%	-6.12%
Other Long-Term Liabilities	$1.442B	$1.318B	$1.292B
YoY Change	10.3%	0.66%	53.15%
Total Long-Term Liabilities	$2.772B	$2.670B	$2.143B
YoY Change	22.01%	22.44%	-6.12%
TOTAL LIABILITIES
Total Short-Term Liabilities	$664.1M	$512.5M	$980.5M
Total Long-Term Liabilities	$2.772B	$2.670B	$2.143B
Total Liabilities	$5.492B	$5.101B	$5.001B
YoY Change	11.72%	4.68%	3.06%
SHAREHOLDERS EQUITY
Retained Earnings	$639.6M	$644.0M	$722.1M
YoY Change	0.15%	1.65%	4.45%
Common Stock	$1.148B	$1.153B	$1.151B
YoY Change	-0.19%	-0.39%	-0.54%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$1.685B	$1.688B	$1.771B
YoY Change
Total Liabilities & Shareholders Equity	$7.251B	$6.866B	$6.849B
YoY Change	8.6%	3.3%	2.27%

Cashflow Statement

Concept	2019 Q1	2018 Q4	2018 Q3
OPERATING ACTIVITIES
Net Income	$18.70M	-$55.08M	$87.52M
YoY Change	24.75%	1.46%	18.69%
Depreciation, Depletion And Amortization	$73.95M	$68.20M	$70.40M
YoY Change	9.15%	0.44%	2.92%
Cash From Operating Activities	$104.7M	$111.3M	$183.0M
YoY Change	32.64%	3.82%	-15.16%
INVESTING ACTIVITIES
Capital Expenditures	-$142.0M	-$135.7M	-$119.9M
YoY Change	20.65%	-7.75%	-2.12%
Acquisitions
YoY Change
Other Investing Activities	$13.00K	-$13.50M	-$6.300M
YoY Change	-110.16%	-236.36%	-191.3%
Cash From Investing Activities	-$151.9M	-$149.2M	-$126.2M
YoY Change	27.45%	8.75%	9.17%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net	$8.936M
YoY Change	-17.6%
Debt Paid & Issued, Net	$200.0M
YoY Change	29.01%
Cash From Financing Activities	$225.2M	5.000M	-26.70M
YoY Change	462.02%	-154.95%	-54.82%
NET CHANGE
Cash From Operating Activities	$104.7M	111.3M	183.0M
Cash From Investing Activities	-$151.9M	-149.2M	-126.2M
Cash From Financing Activities	$225.2M	5.000M	-26.70M
Net Change In Cash	$178.0M	-32.90M	30.10M
YoY Change	-93275.92%	-15.86%	-26.59%
FREE CASH FLOW
Cash From Operating Activities	$104.7M	$111.3M	$183.0M
Capital Expenditures	-$142.0M	-$135.7M	-$119.9M
Free Cash Flow	$246.7M	$247.0M	$302.9M
YoY Change	25.46%	-2.87%	-10.44%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2019	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2019
CY2019	dei	Document Transition Report DocumentTransitionReport	false
CY2019	dei	Amendment Flag AmendmentFlag	false
CY2019	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2019	dei	Entity Central Index Key EntityCentralIndexKey	0001108426
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CY2019Q4	pnm	Accumulated Amortization Nuclear Fuel AccumulatedAmortizationNuclearFuel	42354000	USD
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CY2018Q4	pnm	Cumulative Preferred Stock Of Subsidiary Without Mandatory Redemption Requirements Shares Issued CumulativePreferredStockOfSubsidiaryWithoutMandatoryRedemptionRequirementsSharesIssued	115293	shares
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CY2018Q4	pnm	Cumulative Preferred Stock Of Subsidiary Without Mandatory Redemption Requirements Shares Outstanding CumulativePreferredStockOfSubsidiaryWithoutMandatoryRedemptionRequirementsSharesOutstanding	115293	shares
CY2019Q4	pnm	Cumulative Preferred Stock Of Subsidiary Without Mandatory Redemption Requirements Shares Outstanding CumulativePreferredStockOfSubsidiaryWithoutMandatoryRedemptionRequirementsSharesOutstanding	115293	shares
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CY2019	dei	Document Period End Date DocumentPeriodEndDate	2019-12-31
CY2019	dei	Entity Registrant Name EntityRegistrantName	PNM Resources, Inc.
CY2019	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	NM
CY2019	dei	Entity Shell Company EntityShellCompany	false
CY2019	dei	Entity Address Address Line1 EntityAddressAddressLine1	414 Silver Ave. SW
CY2019	dei	Entity Address City Or Town EntityAddressCityOrTown	Albuquerque
CY2019	dei	Entity Address State Or Province EntityAddressStateOrProvince	NM
CY2019	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	87102
CY2019	dei	City Area Code CityAreaCode	505
CY2019	dei	Local Phone Number LocalPhoneNumber	241-2700
CY2019	dei	Entity File Number EntityFileNumber	001-32462
CY2019	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	85-0468296
CY2019	dei	Security12b Title Security12bTitle	Common Stock, no par value
CY2019	dei	Trading Symbol TradingSymbol	PNM
CY2019	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2019	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2019	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
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CY2019	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2019	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
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CY2017	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	10751000	USD
CY2019	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	-2856000	USD
CY2018	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	-7745000	USD
CY2017	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	2699000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-5524000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-5646000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-3948000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-2607000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	425000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	612000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-547000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-160000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-356000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	9307000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-1536000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	14097000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	101438000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	99746000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	109516000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	14241000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	15112000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	15017000	USD
CY2019	us-gaap	Dividends Preferred Stock DividendsPreferredStock	528000	USD
CY2018	us-gaap	Dividends Preferred Stock DividendsPreferredStock	528000	USD
CY2017	us-gaap	Dividends Preferred Stock DividendsPreferredStock	528000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	86669000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	84106000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	93971000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	92131000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	101282000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	95419000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	301068000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	275641000	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	268194000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-25385000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	8019000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	130528000	USD
CY2019	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	29589000	USD
CY2018	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	-17176000	USD
CY2017	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	27161000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	6414000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	7120000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	6194000	USD
CY2019	pnm	Regulatory Disallowance RegulatoryDisallowance	151095000	USD
CY2018	pnm	Regulatory Disallowance RegulatoryDisallowance	65598000	USD
CY2017	pnm	Regulatory Disallowance RegulatoryDisallowance	27036000	USD
CY2019	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	9478000	USD
CY2018	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	10404000	USD
CY2017	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	9516000	USD
CY2019	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-2395000	USD
CY2018	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-3529000	USD
CY2017	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-5204000	USD
CY2019	pnm	Increase Decrease In Accounts Receivable And Unbilled Revenues IncreaseDecreaseInAccountsReceivableAndUnbilledRevenues	-3796000	USD
CY2018	pnm	Increase Decrease In Accounts Receivable And Unbilled Revenues IncreaseDecreaseInAccountsReceivableAndUnbilledRevenues	8702000	USD
CY2017	pnm	Increase Decrease In Accounts Receivable And Unbilled Revenues IncreaseDecreaseInAccountsReceivableAndUnbilledRevenues	1846000	USD
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	6095000	USD
CY2018	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	5331000	USD
CY2017	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-1473000	USD
CY2019	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	-1872000	USD
CY2018	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	-2491000	USD
CY2017	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	-31298000	USD
CY2019	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	-42803000	USD
CY2018	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	840000	USD
CY2017	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	5486000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-272000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-20714000	USD
CY2017	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	14468000	USD
CY2019	pnm	Increase Decrease In Accrued Interest And Taxes IncreaseDecreaseInAccruedInterestAndTaxes	14691000	USD
CY2018	pnm	Increase Decrease In Accrued Interest And Taxes IncreaseDecreaseInAccruedInterestAndTaxes	1713000	USD
CY2017	pnm	Increase Decrease In Accrued Interest And Taxes IncreaseDecreaseInAccruedInterestAndTaxes	-327000	USD
CY2019	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	-7212000	USD
CY2018	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	2614000	USD
CY2017	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	-6513000	USD
CY2019	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	-35071000	USD
CY2018	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	-10966000	USD
CY2017	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	-5503000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	503163000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	428226000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	523462000	USD
CY2019	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	616273000	USD
CY2018	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	501213000	USD
CY2017	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	500461000	USD
CY2019	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	494528000	USD
CY2018	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	984533000	USD
CY2017	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	637492000	USD
CY2019	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	513866000	USD
CY2018	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	1007022000	USD
CY2017	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	650284000	USD
CY2019	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	38250000	USD
CY2018	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	9000000	USD
CY2017	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	4077000	USD
CY2019	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	0	USD
CY2018	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	0	USD
CY2017	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	12415000	USD
CY2019	us-gaap	Proceeds From Principal Repayments On Loans And Leases Held For Investment ProceedsFromPrincipalRepaymentsOnLoansAndLeasesHeldForInvestment	0	USD
CY2018	us-gaap	Proceeds From Principal Repayments On Loans And Leases Held For Investment ProceedsFromPrincipalRepaymentsOnLoansAndLeasesHeldForInvestment	56640000	USD
CY2017	us-gaap	Proceeds From Principal Repayments On Loans And Leases Held For Investment ProceedsFromPrincipalRepaymentsOnLoansAndLeasesHeldForInvestment	38360000	USD
CY2019	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	37000	USD
CY2018	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-338000	USD
CY2017	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-392000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-673898000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-475724000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-466163000	USD
CY2019	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-150000000	USD
CY2018	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	50000000	USD
CY2017	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	0	USD
CY2019	us-gaap	Proceeds From Repayments Of Lines Of Credit ProceedsFromRepaymentsOfLinesOfCredit	99200000	USD
CY2018	us-gaap	Proceeds From Repayments Of Lines Of Credit ProceedsFromRepaymentsOfLinesOfCredit	-119500000	USD
CY2017	us-gaap	Proceeds From Repayments Of Lines Of Credit ProceedsFromRepaymentsOfLinesOfCredit	18300000	USD
CY2019	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	745000000	USD
CY2018	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	984652000	USD
CY2017	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	317000000	USD
CY2019	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	407302000	USD
CY2018	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	750162000	USD
CY2017	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	274070000	USD
CY2019	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	943000	USD
CY2018	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	963000	USD
CY2017	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	1739000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	9918000	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	12635000	USD
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	13929000	USD
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	92926000	USD
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	84961000	USD
CY2017	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	77792000	USD
CY2019	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	15401000	USD
CY2018	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	17095000	USD
CY2017	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	17742000	USD
CY2019	pnm	Proceeds From Transmission Interconnection Arrangements ProceedsFromTransmissionInterconnectionArrangements	10015000	USD
CY2018	pnm	Proceeds From Transmission Interconnection Arrangements ProceedsFromTransmissionInterconnectionArrangements	4060000	USD
CY2017	pnm	Proceeds From Transmission Interconnection Arrangements ProceedsFromTransmissionInterconnectionArrangements	11879000	USD
CY2019	pnm	Repayment Of Transmission Interconnection Agreements RepaymentOfTransmissionInterconnectionAgreements	4325000	USD
CY2018	pnm	Repayment Of Transmission Interconnection Agreements RepaymentOfTransmissionInterconnectionAgreements	2830000	USD
CY2017	pnm	Repayment Of Transmission Interconnection Agreements RepaymentOfTransmissionInterconnectionAgreements	21290000	USD
CY2019	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-2840000	USD
CY2018	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-6846000	USD
CY2017	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-2942000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	172446000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	45646000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-58847000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	1711000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-1852000	USD
CY2017	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-1548000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2122000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	3974000	USD
CY2016Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	5522000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	3833000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2122000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	3974000	USD
CY2018Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	0	USD
CY2017Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	0	USD
CY2016Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	1000000	USD
CY2019Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	0	USD
CY2018Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	0	USD
CY2017Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	0	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	115476000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	119308000	USD
CY2017	us-gaap	Interest Paid Net InterestPaidNet	120955000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-2929000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	842000	USD
CY2017	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	625000	USD
CY2019	pnm	Increase Decreaseincapitalexpendituresincurredbutnotyetpaid IncreaseDecreaseincapitalexpendituresincurredbutnotyetpaid	8781000	USD
CY2018	pnm	Increase Decreaseincapitalexpendituresincurredbutnotyetpaid IncreaseDecreaseincapitalexpendituresincurredbutnotyetpaid	-11502000	USD
CY2017	pnm	Increase Decreaseincapitalexpendituresincurredbutnotyetpaid IncreaseDecreaseincapitalexpendituresincurredbutnotyetpaid	-25261000	USD
CY2019	us-gaap	Other Significant Noncash Transaction Value Of Consideration Given1 OtherSignificantNoncashTransactionValueOfConsiderationGiven1	0	USD
CY2018	us-gaap	Other Significant Noncash Transaction Value Of Consideration Given1 OtherSignificantNoncashTransactionValueOfConsiderationGiven1	578000	USD
CY2017	us-gaap	Other Significant Noncash Transaction Value Of Consideration Given1 OtherSignificantNoncashTransactionValueOfConsiderationGiven1	24829000	USD
CY2019Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	36723000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	3833000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	2122000	USD
CY2019Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	85889000	USD
CY2018Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	92800000	USD
CY2019Q4	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	57416000	USD
CY2018Q4	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	57092000	USD
CY2019Q4	us-gaap	Other Receivables OtherReceivables	12165000	USD
CY2018Q4	us-gaap	Other Receivables OtherReceivables	11369000	USD
CY2019Q4	us-gaap	Inventory Net InventoryNet	77929000	USD
CY2018Q4	us-gaap	Inventory Net InventoryNet	71834000	USD
CY2019Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	7373000	USD
CY2018Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	4534000	USD
CY2019Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	4933000	USD
CY2018Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	7965000	USD
CY2019Q4	us-gaap	Other Assets Current OtherAssetsCurrent	44472000	USD
CY2018Q4	us-gaap	Other Assets Current OtherAssetsCurrent	54808000	USD
CY2019Q4	us-gaap	Assets Current AssetsCurrent	294010000	USD
CY2018Q4	us-gaap	Assets Current AssetsCurrent	302524000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Securities Noncurrent AvailableForSaleSecuritiesDebtSecuritiesNoncurrent	388832000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Securities Noncurrent AvailableForSaleSecuritiesDebtSecuritiesNoncurrent	328242000	USD
CY2019Q4	us-gaap	Equity Method Investments EquityMethodInvestments	65159000	USD
CY2018Q4	us-gaap	Equity Method Investments EquityMethodInvestments	26564000	USD
CY2019Q4	us-gaap	Other Long Term Investments OtherLongTermInvestments	356000	USD
CY2018Q4	us-gaap	Other Long Term Investments OtherLongTermInvestments	297000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Other Net PropertyPlantAndEquipmentOtherNet	12459000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Other Net PropertyPlantAndEquipmentOtherNet	3404000	USD
CY2019Q4	pnm	Total Other Property And Investments TotalOtherPropertyAndInvestments	466806000	USD
CY2018Q4	pnm	Total Other Property And Investments TotalOtherPropertyAndInvestments	358507000	USD
CY2019Q4	us-gaap	Public Utilities Property Plant And Equipment Plant In Service PublicUtilitiesPropertyPlantAndEquipmentPlantInService	7918601000	USD
CY2018Q4	us-gaap	Public Utilities Property Plant And Equipment Plant In Service PublicUtilitiesPropertyPlantAndEquipmentPlantInService	7548581000	USD
CY2019Q4	us-gaap	Public Utilities Property Plant And Equipment Accumulated Depreciation PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation	2713503000	USD
CY2018Q4	us-gaap	Public Utilities Property Plant And Equipment Accumulated Depreciation PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation	2604177000	USD
CY2019Q4	pnm	Public Utilities Property Plant And Equipment Net In Service PublicUtilitiesPropertyPlantAndEquipmentNetInService	5205098000	USD
CY2018Q4	pnm	Public Utilities Property Plant And Equipment Net In Service PublicUtilitiesPropertyPlantAndEquipmentNetInService	4944404000	USD
CY2019Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	161106000	USD
CY2018Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	194427000	USD
CY2019Q4	us-gaap	Nuclear Fuel Net Of Amortization NuclearFuelNetOfAmortization	99805000	USD
CY2018Q4	us-gaap	Nuclear Fuel Net Of Amortization NuclearFuelNetOfAmortization	95798000	USD
CY2019Q4	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	5466009000	USD
CY2018Q4	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	5234629000	USD
CY2019Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	556930000	USD
CY2018Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	598930000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	278297000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	278297000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	131212000	USD
CY2019Q4	us-gaap	Other Deferred Costs Net OtherDeferredCostsNet	105510000	USD
CY2018Q4	us-gaap	Other Deferred Costs Net OtherDeferredCostsNet	92664000	USD
CY2019Q4	pnm	Total Deferred Charges And Other Assets TotalDeferredChargesAndOtherAssets	1071949000	USD
CY2018Q4	pnm	Total Deferred Charges And Other Assets TotalDeferredChargesAndOtherAssets	969891000	USD
CY2019Q4	us-gaap	Assets Assets	7298774000	USD
CY2018Q4	us-gaap	Assets Assets	6865551000	USD
CY2019Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	185100000	USD
CY2018Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	235900000	USD
CY2019Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	490268000	USD
CY2018Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	0	USD
CY2019Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	103118000	USD
CY2018Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	112170000	USD
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CY2018Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	9446000	USD
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CY2018Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	23231000	USD
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CY2018Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	55855000	USD
CY2019Q4	us-gaap	Liabilities Current LiabilitiesCurrent	967481000	USD
CY2018Q4	us-gaap	Liabilities Current LiabilitiesCurrent	512453000	USD
CY2019Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	2517449000	USD
CY2018Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	2670111000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	626058000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	600719000	USD
CY2019Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	866243000	USD
CY2018Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	891428000	USD
CY2019Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	181962000	USD
CY2018Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	158674000	USD
CY2019Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	95037000	USD
CY2018Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	100375000	USD
CY2019Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	105512000	USD
CY2019Q4	us-gaap	Deferred Credits And Other Liabilities Noncurrent DeferredCreditsAndOtherLiabilitiesNoncurrent	185753000	USD
CY2018Q4	us-gaap	Deferred Credits And Other Liabilities Noncurrent DeferredCreditsAndOtherLiabilitiesNoncurrent	167668000	USD
CY2019Q4	us-gaap	Liabilities Other Than Longterm Debt Noncurrent LiabilitiesOtherThanLongtermDebtNoncurrent	2060565000	USD
CY2018Q4	us-gaap	Liabilities Other Than Longterm Debt Noncurrent LiabilitiesOtherThanLongtermDebtNoncurrent	1918864000	USD
CY2019Q4	us-gaap	Liabilities Liabilities	5545495000	USD
CY2018Q4	us-gaap	Liabilities Liabilities	5101428000	USD
CY2019Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2018Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2019Q4	pnm	Cumulative Preferred Stock Of Subsidiary Without Mandatory Redemption Requirements CumulativePreferredStockOfSubsidiaryWithoutMandatoryRedemptionRequirements	11529000	USD
CY2018Q4	pnm	Cumulative Preferred Stock Of Subsidiary Without Mandatory Redemption Requirements CumulativePreferredStockOfSubsidiaryWithoutMandatoryRedemptionRequirements	11529000	USD
CY2019Q4	us-gaap	Common Stock Value CommonStockValue	1150552000	USD
CY2018Q4	us-gaap	Common Stock Value CommonStockValue	1153113000	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-99377000	USD
CY2018Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-108684000	USD
CY2019Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	627523000	USD
CY2018Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	643953000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	1678698000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	1688382000	USD
CY2019Q4	us-gaap	Minority Interest MinorityInterest	63052000	USD
CY2018Q4	us-gaap	Minority Interest MinorityInterest	64212000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1741750000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1752594000	USD
CY2019Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	7298774000	USD
CY2018Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	6865551000	USD
CY2016Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1744872000	USD
CY2017Q1	us-gaap	Cumulative Effect Of New Accounting Principle In Period Of Adoption CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	10382000	USD
CY2017Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest Adjusted Balance1 StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1	1755254000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	95419000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	14097000	USD
CY2017	us-gaap	Dividends Preferred Stock DividendsPreferredStock	528000	USD
CY2017	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	79056000	USD
CY2017	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	1739000	USD
CY2017	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	13929000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	6194000	USD
CY2017	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	17742000	USD
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1761448000	USD
CY2018Q1	us-gaap	Cumulative Effect Of New Accounting Principle In Period Of Adoption CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	0	USD
CY2018Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest Adjusted Balance1 StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1	1761448000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	101282000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-1536000	USD
CY2018	us-gaap	Dividends Preferred Stock DividendsPreferredStock	528000	USD
CY2018	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	86425000	USD
CY2018	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	963000	USD
CY2018	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	12635000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	7120000	USD
CY2018	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	17095000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1752594000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	92131000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	9307000	USD
CY2019	us-gaap	Dividends Preferred Stock DividendsPreferredStock	528000	USD
CY2019	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	93792000	USD
CY2019	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	943000	USD
CY2019	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	9918000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	6414000	USD
CY2019	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	15401000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1741750000	USD
CY2018Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	0	USD
CY2017Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	0	USD
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CY2019Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	0	USD
CY2018Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	0	USD
CY2017Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	0	USD
CY2019Q4	pnm	Collaborative Arrangement Owner Obligations Default Amount CollaborativeArrangementOwnerObligationsDefaultAmount	0	USD
CY2019Q4	us-gaap	Inventory Net InventoryNet	77929000	USD
CY2018Q4	us-gaap	Inventory Net InventoryNet	71834000	USD
CY2019	us-gaap	Description Of New Accounting Pronouncements Not Yet Adopted DescriptionOfNewAccountingPronouncementsNotYetAdopted	<div style="line-height:110%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;font-weight:bold;">New Accounting Pronouncements</span></div><div style="line-height:110%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:110%;text-align:justify;text-indent:42px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Information concerning recently issued accounting pronouncements that have not been adopted by the Company is presented below. The Company does not expect difficulty in adopting these standards by their required effective dates.</span></div><div style="line-height:110%;text-align:justify;text-indent:42px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:110%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;font-style:italic;">Accounting Standards Update 2016-13 </span><span style="font-family:inherit;font-size:10pt;">– </span><span style="font-family:inherit;font-size:10pt;font-style:italic;">Financial Instruments </span><span style="font-family:inherit;font-size:10pt;">– </span><span style="font-family:inherit;font-size:10pt;font-style:italic;">Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments</span></div><div style="line-height:110%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:110%;text-align:justify;text-indent:42px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">In June 2016, the FASB issued ASU 2016-13, which changes the way entities recognize impairment of many financial assets, including accounts receivable and investments in certain debt securities, by requiring immediate recognition of estimated credit losses expected to occur over the remaining lives of the assets. In November 2018, the FASB clarified that receivables arising from operating leases are not within the scope of Topic 326 for assets measured at amortized costs. Instead, impairments of receivables arising from operating leases should be accounted for in accordance with Topic 842. In May 2019, the FASB issued transition relief by providing an option to irrevocably elect the fair value option for certain financial assets previously measured at amortized cost. The Company is in the process of analyzing the impacts of the new standard but does not anticipate a significant impact on its reserves for trade receivables or on PNMR’s guarantees of certain PNMR Development debt arrangements. A cumulative effect adjustment is also not anticipated upon implementation. ASU 2016-13 also requires entities to separately measure and realize an impairment for credit losses on available-for-sale debt securities for which carrying value exceeds fair value, unless such securities have been determined to be other than temporarily impaired and the entire decrease in value has been realized as an impairment. PNM records a realized loss as an impairment for any available-for-sale debt security that has a fair value that is less than carrying value at the end of each quarter. As a result, the Company does not anticipate the new standard will impact its accounting for available-for-sale debt securities. The Company will adopt ASU 2016-13 as of January 1, 2020, its required effective date.</span></div><div style="line-height:110%;text-align:justify;text-indent:42px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:110%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;font-style:italic;">Accounting Standards Update 2017-04 </span><span style="font-family:inherit;font-size:10pt;">–</span><span style="font-family:inherit;font-size:10pt;font-style:italic;"> Intangibles </span><span style="font-family:inherit;font-size:10pt;">–</span><span style="font-family:inherit;font-size:10pt;font-style:italic;"> Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment</span></div><div style="line-height:110%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:110%;text-align:justify;text-indent:42px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">In January 2017, the FASB issued ASU 2017-04 to simplify the annual goodwill impairment assessment process. Currently, the first step of a quantitative impairment test requires an entity to compare the fair value of each reporting unit containing goodwill with its carrying value (including goodwill). If as a result of this analysis, the entity concludes there is an indication of impairment in a reporting unit having goodwill, the entity is required to perform the second step of the impairment analysis, determining the amount of goodwill impairment to be recorded. The amount is calculated by comparing the implied fair value of the goodwill to its carrying amount. This exercise requires the entity to allocate the fair value determined in step one to the individual assets and liabilities of the reporting unit. Any remaining fair value would be the implied fair value of goodwill on the testing date. To the extent the recorded amount of goodwill of a reporting unit exceeds the implied fair value determined in step two, an impairment loss would be reflected in results of operations. ASU 2017-04 eliminates the second step of the impairment analysis. Accordingly, if the first step of a quantitative goodwill impairment analysis performed after adoption of ASU 2017-04 indicates that the fair </span></div><div style="line-height:110%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">value of a reporting unit is less than its carrying value, the goodwill of that reporting unit would be impaired to the extent of that difference. The Company will adopt ASU 2017-04 for impairment testing after January 1, 2020, its required effective date.</span></div><div style="line-height:110%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:110%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;font-style:italic;">Accounting Standards Update 2018-13 – Fair Value Measurements (Topic 820) Disclosure Framework: Changes to the Disclosure Requirements for Fair Value Measurements</span></div><div style="line-height:110%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:110%;text-align:justify;text-indent:42px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">In August 2018, the FASB issued ASU 2018-13 to improve fair value disclosures. ASU 2018-13 eliminates certain disclosure requirements related to transfers between Levels 1 and 2 of the fair value hierarchy and the requirement to disclose the valuation process for Level 3 fair value measurements. ASU 2018-13 also amends certain disclosure requirements for investments measured at net asset value and requires new disclosures for Level 3 investments, including a new requirement to disclose changes in unrealized gains or losses recorded in OCI related to Level 3 fair value measurements. ASU 2018-13 is effective for the Company beginning on January 1, 2020 and permits entities to adopt all or certain elements of the new guidance prior to its effective date. ASU 2018-13 requires retrospective application, except for the new disclosures related to Level 3 investments which are to be applied prospectively. As discussed in Note 9, PNM and TNMP have investment securities in trusts for decommissioning, reclamation, pension benefits, and other postretirement benefits, which are measured at fair value. Certain investments in these trusts are measured at net asset value per share. These trusts currently hold no Level 3 investments. The Company is evaluating the requirements of ASU 2018-13, but does not anticipate it will have a significant impact on the Company’s fair value disclosures.</span></div><div style="line-height:110%;text-align:justify;text-indent:42px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:110%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;font-style:italic;">Accounting Standards Update 2018-14 – Compensation - Retirement Benefits - Defined Benefit Plans (Topic 715) Disclosure Framework: Changes to the Disclosure Requirements for Defined Benefit Plans</span></div><div style="line-height:110%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:110%;text-align:justify;text-indent:42px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">In August 2018, the FASB issued ASU 2018-14 to improve benefit plan sponsors’ disclosures for defined benefit pension and other post-employment benefit plans. ASU 2018-14 removes the requirement to disclose the amounts in other comprehensive income expected to be recognized as benefit cost over the next fiscal year and the requirement to disclose the impact of a one-percentage-point change in the assumed health care cost trend rate; clarifies the disclosure requirements for plans with assets that are less than their projected benefit, or accumulated benefit obligation; and requires significant gains and losses affecting benefit obligations during the period be disclosed. ASU 2018-14 is effective for the Company on December 31, 2020, although early adoption is permitted, and requires retrospective application. As discussed in Note 11, PNM and TNMP maintain qualified defined benefit, other postretirement benefit plans providing medical and dental benefits, and executive retirement programs. The Company is in the process of evaluating the requirements of ASU 2018-14 but does not anticipate these changes will have a significant impact on the Company’s defined benefit and other postretirement benefit plan disclosures.</span></div><div style="line-height:110%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:110%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;font-style:italic;">Accounting Standards Update 2018-15 – Intangibles - Goodwill and Other - Internal Use Software (Topic 350): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That is a Service Contract</span></div><div style="line-height:110%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:110%;text-align:justify;text-indent:42px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">In August 2018, the FASB issued ASU 2018-15 to align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for implementation costs incurred to develop or obtain internal-use software. Under ASU 2018-15, entities are required to capitalize implementation costs for hosting arrangements if those costs meet the capitalization requirements for internal-use software arrangements. ASU 2018-15 requires entities to present cash flows, capitalized costs, and amortization expense in the same financial statement line items as other costs incurred for such hosting arrangements. ASU 2018-15 is effective for the Company on January 1, 2020 and allows entities to apply the new requirements retrospectively or prospectively. The Company is in the process of analyzing the impacts of this new standard.</span></div><div style="line-height:110%;text-align:justify;text-indent:42px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:110%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;font-style:italic;">Accounting Standards Update 2019-12 – Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes</span></div><div style="line-height:110%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:110%;text-align:justify;text-indent:42px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">In December 2019, the FASB issued ASU 2019-12 as part of its initiative to reduce complexity in accounting standards. The amendments in ASU 2019-12 simplify accounting for income taxes by removing several accounting exceptions to accounting for income taxes. ASU 2019-12 also eliminates or simplifies other income tax accounting requirements, including a requirement that entities recognize franchise tax (or similar tax) that is partially based on income as an income-based tax. ASU 2019-12 is effective for the Company beginning on January 1, 2021 and allows for early adoption. ASU 2019-12 is to be applied prospectively or retrospectively in the period of adoption depending on the type of amendment. The Company is in the process of analyzing the impacts of this new standard.</span></div>
CY2019	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	632783000	USD
CY2019	us-gaap	Cost Of Goods And Services Sold Depreciation And Amortization CostOfGoodsAndServicesSoldDepreciationAndAmortization	267808000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	144200000	USD
CY2019	us-gaap	Investment Income Interest InvestmentIncomeInterest	14022000	USD
CY2019	pnm	Other Income Deductions Excluding Interest OtherIncomeDeductionsExcludingInterest	29643000	USD
CY2019	us-gaap	Interest Expense InterestExpense	121016000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	66849000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-25282000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	92131000	USD
CY2019	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	14241000	USD
CY2019	us-gaap	Dividends Preferred Stock DividendsPreferredStock	528000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	77362000	USD
CY2019Q4	us-gaap	Assets Assets	7298774000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	278297000	USD
CY2018	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	559652000	USD
CY2018	us-gaap	Cost Of Goods And Services Sold Depreciation And Amortization CostOfGoodsAndServicesSoldDepreciationAndAmortization	241188000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	236047000	USD
CY2018	us-gaap	Investment Income Interest InvestmentIncomeInterest	15540000	USD
CY2018	pnm	Other Income Deductions Excluding Interest OtherIncomeDeductionsExcludingInterest	-15286000	USD
CY2018	us-gaap	Interest Expense InterestExpense	127244000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	109057000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7775000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	101282000	USD
CY2018	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	15112000	USD
CY2018	us-gaap	Dividends Preferred Stock DividendsPreferredStock	528000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	85642000	USD
CY2018Q4	us-gaap	Assets Assets	6865551000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	278297000	USD
CY2017	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	490543000	USD
CY2017	us-gaap	Cost Of Goods And Services Sold Depreciation And Amortization CostOfGoodsAndServicesSoldDepreciationAndAmortization	231942000	USD
CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	315039000	USD
CY2017	us-gaap	Investment Income Interest InvestmentIncomeInterest	15916000	USD
CY2017	pnm	Other Income Deductions Excluding Interest OtherIncomeDeductionsExcludingInterest	22429000	USD
CY2017	us-gaap	Interest Expense InterestExpense	127625000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	225759000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	130340000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	95419000	USD
CY2017	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	15017000	USD
CY2017	us-gaap	Dividends Preferred Stock DividendsPreferredStock	528000	USD
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	79874000	USD
CY2017Q4	us-gaap	Assets Assets	6646103000	USD
CY2017Q4	us-gaap	Goodwill Goodwill	278297000	USD
CY2019Q4	pnm	Number Of Regulated Utilities NumberOfRegulatedUtilities	2	utility
CY2019Q4	us-gaap	Capitalized Contract Cost Amortization Period CapitalizedContractCostAmortizationPeriod	P5Y
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1377208000	USD
CY2019	us-gaap	Revenue Not From Contract With Customer RevenueNotFromContractWithCustomer	-542000	USD
CY2019	us-gaap	Revenue Not From Contract With Customer Other RevenueNotFromContractWithCustomerOther	80937000	USD
CY2019	us-gaap	Revenues Revenues	1457603000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1359740000	USD
CY2018	us-gaap	Revenue Not From Contract With Customer RevenueNotFromContractWithCustomer	1756000	USD
CY2018	us-gaap	Revenue Not From Contract With Customer Other RevenueNotFromContractWithCustomerOther	75117000	USD
CY2018	us-gaap	Revenues Revenues	1436613000	USD
CY2019Q4	us-gaap	Commodity Contract Asset Current CommodityContractAssetCurrent	0	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	77362000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	85642000	USD
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	79874000	USD
CY2019	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	79654000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	79654000	shares
CY2017	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	79654000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Restricted Stock WeightedAverageNumberOfSharesRestrictedStock	277000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Restricted Stock WeightedAverageNumberOfSharesRestrictedStock	236000	shares
CY2017	us-gaap	Weighted Average Number Of Shares Restricted Stock WeightedAverageNumberOfSharesRestrictedStock	237000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	79931000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	79890000	shares
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	79891000	shares
CY2019	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	59000	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	122000	shares
CY2017	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	250000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	79990000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	80012000	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	80141000	shares
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.97
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.07
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.00
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.97
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.07
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.00
CY2019	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.1775
CY2018	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.0850
CY2017	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.9925
CY2019	us-gaap	Dividends Dividends	257600000	USD
CY2017Q1	us-gaap	Derivative Fixed Interest Rate DerivativeFixedInterestRate	0.01927
CY2018Q1	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	24500000	USD
CY2019Q1	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	24500000	USD
CY2019Q1	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	25000000.0	USD
CY2019Q3	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	40000000.0	USD
CY2019Q3	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	50000000	USD
CY2019Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	185100000	USD
CY2018Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	235900000	USD
CY2019Q4	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	4700000	USD
CY2019Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	3004043000	USD
CY2019Q4	us-gaap	Unamortized Loan Commitment And Origination Fees And Unamortized Discounts Or Premiums UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums	-3674000	USD
CY2018Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	2666345000	USD
CY2018Q4	us-gaap	Unamortized Loan Commitment And Origination Fees And Unamortized Discounts Or Premiums UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums	-3765000	USD
CY2019Q4	pnm	Longtermdebt Currentmaturities Gross LongtermdebtCurrentmaturitiesGross	490345000	USD
CY2019Q4	pnm	Unamortized Loan Commitmentand Origination Feesand Unamortized Discountsor Premiums Current Portion UnamortizedLoanCommitmentandOriginationFeesandUnamortizedDiscountsorPremiumsCurrentPortion	77000	USD
CY2018Q4	pnm	Longtermdebt Currentmaturities Gross LongtermdebtCurrentmaturitiesGross	0	USD
CY2018Q4	pnm	Unamortized Loan Commitmentand Origination Feesand Unamortized Discountsor Premiums Current Portion UnamortizedLoanCommitmentandOriginationFeesandUnamortizedDiscountsorPremiumsCurrentPortion	0	USD
CY2019Q4	pnm	Longtermdebt Excludingcurrentmaturities Gross LongtermdebtExcludingcurrentmaturitiesGross	2513698000	USD
CY2019Q4	pnm	Unamortized Loan Commitmentand Origination Feesand Unamortized Discountsor Premiums Excluding Current Portion UnamortizedLoanCommitmentandOriginationFeesandUnamortizedDiscountsorPremiumsExcludingCurrentPortion	-3751000	USD
CY2018Q4	pnm	Longtermdebt Excludingcurrentmaturities Gross LongtermdebtExcludingcurrentmaturitiesGross	2666345000	USD
CY2018Q4	pnm	Unamortized Loan Commitmentand Origination Feesand Unamortized Discountsor Premiums Excluding Current Portion UnamortizedLoanCommitmentandOriginationFeesandUnamortizedDiscountsorPremiumsExcludingCurrentPortion	-3765000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	490345000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	796000000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	57000000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	55000000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	80000000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	1525698000	USD
CY2019Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	3004043000	USD
CY2019Q4	pnm	Unamortized Cost Of Prepaid Right Of Way Agreements UnamortizedCostOfPrepaidRightOfWayAgreements	60200000	USD
CY2018Q4	pnm	Unamortized Cost Of Prepaid Right Of Way Agreements UnamortizedCostOfPrepaidRightOfWayAgreements	63000000.0	USD
CY2019	pnm	Amortization Of Prepaid Right Of Way Agreements AmortizationOfPrepaidRightOfWayAgreements	3700000	USD
CY2018	pnm	Amortization Of Prepaid Right Of Way Agreements AmortizationOfPrepaidRightOfWayAgreements	3800000	USD
CY2017	pnm	Amortization Of Prepaid Right Of Way Agreements AmortizationOfPrepaidRightOfWayAgreements	3500000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	131212000	USD
CY2019Q1	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	157440000	USD
CY2019Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	29068000	USD
CY2019Q1	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	25189000	USD
CY2019Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	105512000	USD
CY2019Q1	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	135174000	USD
CY2019Q4	pnm	Finance Lease Right Of Use Asset Gross FinanceLeaseRightOfUseAssetGross	10028000	USD
CY2019Q4	pnm	Finance Lease Right Of Use Asset Accumulated Depreciation FinanceLeaseRightOfUseAssetAccumulatedDepreciation	973000	USD
CY2019Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	9055000	USD
CY2019Q4	pnm	Finance Lease Liability Current Other FinanceLeaseLiabilityCurrentOther	1637000	USD
CY2019Q4	pnm	Finance Lease Liability Deferred Credits Other FinanceLeaseLiabilityDeferredCreditsOther	7102000	USD
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P6Y5M26D
CY2019Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P5Y6M14D
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0390
CY2019Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.0364
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	31963000	USD
CY2019	pnm	Operating Lease Capitalized Costs OperatingLeaseCapitalizedCosts	-3913000	USD
CY2019	us-gaap	Operating Lease Expense OperatingLeaseExpense	28050000	USD
CY2019	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	973000	USD
CY2019	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	194000	USD
CY2019	pnm	Finance Lease Capitalized Costs FinanceLeaseCapitalizedCosts	-704000	USD
CY2019	pnm	Finance Lease Cost FinanceLeaseCost	463000	USD
CY2019	us-gaap	Variable Lease Cost VariableLeaseCost	96000	USD
CY2019	us-gaap	Short Term Lease Cost ShortTermLeaseCost	414000	USD
CY2019	us-gaap	Lease Cost LeaseCost	29023000	USD
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	27849000	USD
CY2019	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	71000	USD
CY2019	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	313000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	157816000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	9645000	USD
CY2019	pnm	Operating Leases Capitalized Financing Costs Investing Activities OperatingLeasesCapitalizedFinancingCostsInvestingActivities	3900000	USD
CY2019	pnm	Finance Leases Capitalized Financing Costs Investing Activities FinanceLeasesCapitalizedFinancingCostsInvestingActivities	700000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	29316000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	1925000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	30660000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	1866000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	1807000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	28473000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	1624000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	19423000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	1153000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	8833000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	1249000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	35489000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	9624000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	152194000	USD
CY2019Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	885000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	17614000	USD
CY2019Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	8739000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	134580000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Remainder Of Fiscal Year OperatingLeasesFutureMinimumPaymentsRemainderOfFiscalYear	31772000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	30404000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	29012000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	28175000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	18868000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	43489000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	181720000	USD
CY2019Q4	pnm	Lessee Operating Lease Unguaranteed Residual Value LesseeOperatingLeaseUnguaranteedResidualValue	21800000	USD
CY2019Q4	pnm	Contract With Customer Liability Net ContractWithCustomerLiabilityNet	0	USD
CY2019	us-gaap	Equity Securities Fv Ni Realized Gain Loss EquitySecuritiesFvNiRealizedGainLoss	5698000	USD
CY2018	us-gaap	Equity Securities Fv Ni Realized Gain Loss EquitySecuritiesFvNiRealizedGainLoss	4864000	USD
CY2019	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	18319000	USD
CY2018	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-10523000	USD
CY2019	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	24017000	USD
CY2018	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	-5659000	USD
CY2019	us-gaap	Debt Securities Realized Gain Loss DebtSecuritiesRealizedGainLoss	5572000	USD
CY2018	us-gaap	Debt Securities Realized Gain Loss DebtSecuritiesRealizedGainLoss	-11517000	USD
CY2019	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	29589000	USD
CY2018	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	-17176000	USD
CY2019	pnm	Increase Decrease In Other Than Temporary Losses Investments Portion Recognizedin Earnings Net Availableforsale Securities IncreaseDecreaseInOtherThanTemporaryLossesInvestmentsPortionRecognizedinEarningsNetAvailableforsaleSecurities	3000000.0	USD
CY2018	pnm	Increase Decrease In Other Than Temporary Losses Investments Portion Recognizedin Earnings Net Availableforsale Securities IncreaseDecreaseInOtherThanTemporaryLossesInvestmentsPortionRecognizedinEarningsNetAvailableforsaleSecurities	9400000	USD
CY2017	pnm	Increase Decrease In Other Than Temporary Losses Investments Portion Recognizedin Earnings Net Availableforsale Securities IncreaseDecreaseInOtherThanTemporaryLossesInvestmentsPortionRecognizedinEarningsNetAvailableforsaleSecurities	3300000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	0	USD
CY2018	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Net FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet	0	USD
CY2019	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Expected Long Term Return On Assets DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets	0.040
CY2019	pnm	Defined Benefit Plans Gains And Losses That Lie Outside Corridor Amortized In Years DefinedBenefitPlansGainsAndLossesThatLieOutsideCorridorAmortizedInYears	P5Y
CY2019	us-gaap	Defined Contribution Plan Maximum Annual Contributions Per Employee Percent DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent	0.75
CY2019	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent DefinedContributionPlanEmployerMatchingContributionPercent	0.06
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	6400000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	7100000	USD
CY2017	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	6200000	USD
CY2019Q4	pnm	Budgeted Future Construction Expenditures Year One BudgetedFutureConstructionExpendituresYearOne	811700000	USD
CY2019Q4	pnm	Budgeted Future Construction Expenditures Year Two BudgetedFutureConstructionExpendituresYearTwo	992400000	USD
CY2019Q4	pnm	Budgeted Future Construction Expenditures Year Three BudgetedFutureConstructionExpendituresYearThree	694600000	USD
CY2019Q4	pnm	Budgeted Future Construction Expenditures Year Four BudgetedFutureConstructionExpendituresYearFour	771000000.0	USD
CY2019Q4	pnm	Budgeted Future Construction Expenditures Year Five BudgetedFutureConstructionExpendituresYearFive	546400000	USD
CY2019Q4	pnm	Total Budgeted Construction Expenditures TotalBudgetedConstructionExpenditures	3816100000	USD
CY2019Q4	pnm	Asset Retirement Obligation Liabilities Relatedto Nuclear Decommissioning AssetRetirementObligationLiabilitiesRelatedtoNuclearDecommissioning	0.76
CY2016Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	127519000	USD
CY2017	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	1854000	USD
CY2017	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	968000	USD
CY2017	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	10680000	USD
CY2017	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	7594000	USD
CY2017Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	146679000	USD
CY2018	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	0	USD
CY2018	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	192000	USD
CY2018	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	11482000	USD
CY2018	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	705000	USD
CY2018Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	158674000	USD
CY2019	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	0	USD
CY2019	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	987000	USD
CY2019	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	12635000	USD
CY2019	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	11640000	USD
CY2019Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	181962000	USD
CY2019	pnm	Number Of Options For Meeting Bta Standards NumberOfOptionsForMeetingBTAStandards	7	option
CY2018Q1	pnm	Public Utilities Percentof Nonfuel Revenue Requirement Change Implemented PublicUtilitiesPercentofNonfuelRevenueRequirementChangeImplemented	0.50
CY2016Q3	pnm	Public Utilities Numberof Requested Rates PublicUtilitiesNumberofRequestedRates	2	service_rate
CY2018	us-gaap	Other Income Tax Expense Benefit Continuing Operations OtherIncomeTaxExpenseBenefitContinuingOperations	-345000	USD
CY2018Q2	pnm	Public Utilities Unrecovered Investment Revenue PublicUtilitiesUnrecoveredInvestmentRevenue	20200000	USD
CY2017	pnm	Tax Cuts And Jobs Act Of2017 Net Regulatory Liability TaxCutsAndJobsActOf2017NetRegulatoryLiability	548952000	USD
CY2017	pnm	Tax Cutsand Jobs Actof2017 Incomplete Accounting Changein Tax Rate Deferred Tax Liability Provisional Income Tax Expense Benefit TaxCutsandJobsActof2017IncompleteAccountingChangeinTaxRateDeferredTaxLiabilityProvisionalIncomeTaxExpenseBenefit	491491000	USD
CY2017	us-gaap	Tax Cuts And Jobs Act Of2017 Incomplete Accounting Provisional Income Tax Expense Benefit TaxCutsAndJobsActOf2017IncompleteAccountingProvisionalIncomeTaxExpenseBenefit	57461000	USD
CY2017	us-gaap	Tax Cuts And Jobs Act Of2017 Reclassification From Aoci To Retained Earnings Tax Effect TaxCutsAndJobsActOf2017ReclassificationFromAociToRetainedEarningsTaxEffect	17600000	USD
CY2018	pnm	Tax Cuts And Jobs Act Of2017 Net Regulatory Liability TaxCutsAndJobsActOf2017NetRegulatoryLiability	7175000	USD
CY2018	pnm	Tax Cutsand Jobs Actof2017 Incomplete Accounting Changein Tax Rate Deferred Tax Liability Provisional Income Tax Expense Benefit TaxCutsandJobsActof2017IncompleteAccountingChangeinTaxRateDeferredTaxLiabilityProvisionalIncomeTaxExpenseBenefit	1910000	USD
CY2018	pnm	Tax Cutsand Jobs Actof2017 Incomplete Accounting Changein Tax Rate Affiliate Receivables Payables Provisional Income Tax Expense Benefit TaxCutsandJobsActof2017IncompleteAccountingChangeinTaxRateAffiliateReceivablesPayablesProvisionalIncomeTaxExpenseBenefit	0	USD
CY2018	us-gaap	Tax Cuts And Jobs Act Of2017 Incomplete Accounting Provisional Income Tax Expense Benefit TaxCutsAndJobsActOf2017IncompleteAccountingProvisionalIncomeTaxExpenseBenefit	5265000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	60000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	USD
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	43000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-244000	USD
CY2017	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-188000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-20372000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	7716000	USD
CY2017	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	119182000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-4491000	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	648000	USD
CY2017	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	11632000	USD
CY2019	us-gaap	Other Income Tax Expense Benefit Continuing Operations OtherIncomeTaxExpenseBenefitContinuingOperations	-522000	USD
CY2017	us-gaap	Other Income Tax Expense Benefit Continuing Operations OtherIncomeTaxExpenseBenefitContinuingOperations	-286000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-25282000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7775000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	130340000	USD
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	14038000	USD
CY2018	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	22902000	USD
CY2017	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	79016000	USD
CY2019	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	522000	USD
CY2018	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	345000	USD
CY2017	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	286000	USD
CY2019	pnm	Effective Income Tax Rate Reconciliation Deductible Expense Amortization Of Excess Deferred Income Tax EffectiveIncomeTaxRateReconciliationDeductibleExpenseAmortizationOfExcessDeferredIncomeTax	37799000	USD
CY2018	pnm	Effective Income Tax Rate Reconciliation Deductible Expense Amortization Of Excess Deferred Income Tax EffectiveIncomeTaxRateReconciliationDeductibleExpenseAmortizationOfExcessDeferredIncomeTax	19779000	USD
CY2017	pnm	Effective Income Tax Rate Reconciliation Deductible Expense Amortization Of Excess Deferred Income Tax EffectiveIncomeTaxRateReconciliationDeductibleExpenseAmortizationOfExcessDeferredIncomeTax	0	USD
CY2019	us-gaap	Income Tax Reconciliation Nondeductible Expense Depreciation And Amortization IncomeTaxReconciliationNondeductibleExpenseDepreciationAndAmortization	1136000	USD
CY2018	us-gaap	Income Tax Reconciliation Nondeductible Expense Depreciation And Amortization IncomeTaxReconciliationNondeductibleExpenseDepreciationAndAmortization	712000	USD
CY2017	us-gaap	Income Tax Reconciliation Nondeductible Expense Depreciation And Amortization IncomeTaxReconciliationNondeductibleExpenseDepreciationAndAmortization	1147000	USD
CY2019	us-gaap	Income Tax Reconciliation Minority Interest Income Expense IncomeTaxReconciliationMinorityInterestIncomeExpense	2991000	USD
CY2018	us-gaap	Income Tax Reconciliation Minority Interest Income Expense IncomeTaxReconciliationMinorityInterestIncomeExpense	3173000	USD
CY2017	us-gaap	Income Tax Reconciliation Minority Interest Income Expense IncomeTaxReconciliationMinorityInterestIncomeExpense	5256000	USD
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$TXNM
TXNM ENERGY INC Stock $txnm

2019 Q1 Form 10-K Financial Statement

#000110842620000014 Filed on March 02, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$TXNM TXNM ENERGY INC Stock $txnm

2019 Q1 Form 10-K Financial Statement

#000110842620000014 Filed on March 02, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$TXNM
TXNM ENERGY INC Stock $txnm