Component: (Network and Table) | |
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Network | 2413402 - Disclosure - Income Taxes (Schedule Of Effective Income Tax Rate Reconciliation) (Details) (http://www.ameren.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateReconciliationDetails) |
Table | Income Taxes [Table] |
Reporting Entity [Axis] | 0001002910 (http://www.sec.gov/CIK) |
Income Taxes [Line Items] | Period [Axis] | ||||||||
---|---|---|---|---|---|---|---|---|---|
2012-01-01 - 2012-12-31 | 2011-01-01 - 2011-12-31 | 2010-01-01 - 2010-12-31 | |||||||
Legal Entity [Axis] | Legal Entity [Axis] | Legal Entity [Axis] | |||||||
Union Electric Company [Member] | Ameren Illinois Company [Member] | Entity [Domain] | Union Electric Company [Member] | Ameren Illinois Company [Member] | Entity [Domain] | Union Electric Company [Member] | Ameren Illinois Company [Member] | Entity [Domain] | |
Statutory federal income tax rate: | 0.35 | 0.35 | 0.35 | 0.35 | 0.35 | 0.35 | 0.35 | 0.35 | 0.35 |
Non-deductible impairment of goodwill | xsi:nil | xsi:nil | .32 | ||||||
Depreciation differences | (.01) | xsi:nil | xsi:nil | (.02) | xsi:nil | (.01) | (.03) | xsi:nil | (.04) |
Amortization of investment tax credit | (.01) | (.01) | .01 | (.01) | (.01) | (.01) | (.01) | (.01) | (.02) |
State tax | .03 | .06 | .05 | .03 | .05 | .04 | .03 | .05 | .08 |
Reserve for uncertain tax positions | .01 | xsi:nil | xsi:nil | xsi:nil | xsi:nil | (.01) | |||
Other permanent items | .01 2 | xsi:nil | xsi:nil | ||||||
Tax credits | xsi:nil | xsi:nil | (.03) | ||||||
Change in federal tax law | .01 1 | xsi:nil1 | .03 1 | ||||||
Effective income tax rate | .37 | .40 | .41 | .36 | .39 | .37 | .35 | .39 | .68 |