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Summary of Budgeted Construction Expenditures (Details) (USD $) In Millions, unless otherwise specified | Dec. 31, 2012
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Summary of Budgeted Construction Expenditures [Line Items] |
2013 | $ 372.8
2014 | 398.5
2015 | 429.5
2016 | 300.6
2017 | 280.5
Total | 1,781.9
Public Service Company of New Mexico [Member] |
Summary of Budgeted Construction Expenditures [Line Items] |
2013 | 274.0
2014 | 287.2
2015 | 310.1
2016 | 196.7
2017 | 174.5
Total | 1,242.5
Texas-New Mexico Power Company [Member] |
Summary of Budgeted Construction Expenditures [Line Items] |
2013 | 84.0
2014 | 97.5
2015 | 105.6
2016 | 90.5
2017 | 92.7
Total | 470.3
Other Subsidiaries [Member] |
Summary of Budgeted Construction Expenditures [Line Items] |
2013 | 14.8
2014 | 13.8
2015 | 13.8
2016 | 13.4
2017 | 13.3
Total | $ 69.1

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- Definition Budgeted Future Construction Expenditures, Year Five + References No definition available. + Details
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- Definition Budgeted Future Construction Expenditures, Year Four + References No definition available. + Details
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Balance Type: | debit
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- Definition Budgeted Future Construction Expenditures, Year One + References No definition available. + Details
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Balance Type: | debit
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- Definition Budgeted Future Construction Expenditures, Year Three + References No definition available. + Details
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Balance Type: | debit
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- Definition Budgeted Future Construction Expenditures, Year Two + References No definition available. + Details
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- Details
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- Definition Total Budgeted Construction Expenditures + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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Period Type: | instant