2.2.0.7 false Income Taxes 0205 - Disclosure - Income Taxes true false false false 1 false false 2 Income Taxes [Abstract] 0 us-gaap_IncomeTaxExpenseBenefitAbstract us-gaap true na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 3 INCOME TAXES 1 us-gaap_IncomeTaxDisclosureTextBlock us-gaap true na duration No definition available. false false false false false false false false false false false verboselabel false 1 false false false false 0 0   <div style="font-family: Helvetica,Arial,sans-serif; margin-left: 0in; "> <div align="left" style="font-size: 10pt; margin-top: 10pt"><u><b>NOTE 5. INCOME TAXES</b></u> </div> <div align="left" style="font-size: 10pt; margin-top: 10pt">For the quarters ended June 30, 2010 and June 30, 2009, the effective tax rate differed from the federal rate, primarily due to state income taxes and the impact of the domestic production activities deduction. In addition, the effective rate for the quarter ended June 30, 2010 was impacted by an increase in the valuation allowance relating to a capital loss from Millennium’s sale of Nations Energy Corporation. </div> <div align="left" style="font-size: 10pt; margin-top: 10pt">UniSource Energy recognized a $12 million capital loss from Millennium’s sale of Nations Energy Corporation during the quarter ended March 31, 2010. The loss generated a deferred tax asset of $5 million. As of March 31, 2010 UniSource Energy had reduced the $5 million capital loss deferred tax asset by a $2 million valuation allowance. Corporate capital losses can reduce taxable income if there are offsetting capital gains during 2010, the 3-year carryback period, or the 5-year carryforward period. If they remain unused after the 5-year carryforward period, they expire. Deferred tax assets are reduced by a valuation allowance when, in the opinion of management, it is more likely than not that some portion, or the entire deferred tax asset, will not be realized. Management expects to use $2 million of the deferred tax asset during the 3 year carryback period. Management expects the remaining $3 million deferred tax asset to expire unused. As a result, a $1 million increase in the valuation allowance was recorded during the quarter ended June 30, 2010. </div> <div align="left"> </div> </div>  <!-- Begin Block Tagged Note false false false us-types:textBlockItemType textblock Description containing the entire income tax disclosure. Examples include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information. This element may be used as a single block of text to encapsulate the entire disclosure including data and tables. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 136, 172 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43, 44, 45, 46, 47, 48, 49 false 1 2 false UnKnown UnKnown UnKnown false true