Income Taxes	6 Months Ended
Jun. 30, 2015
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes For interim income tax reporting we estimate our annual effective tax rate and apply it to our year-to-date ordinary income. Tax jurisdictions with a projected or year-to-date loss for which a tax benefit cannot be realized are excluded from the annualized effective tax rate. The tax effects of unusual or infrequently occurring items, including changes in judgment about valuation allowances and effects of changes in tax laws or rates, are reported in the interim period in which they occur. In the three and six months ended June 30, 2015 income tax expense of $39 million and $103 million primarily resulted from tax expense attributable to entities included in our effective tax rate calculation, partially offset by tax benefits related to releases of uncertain tax positions in various jurisdictions and an increase in certain U.S. federal tax credits. In the three and six months ended June 30, 2014 income tax expense of $90 million and $167 million primarily resulted from tax expense attributable to entities included in our effective tax rate calculation. Although we are included in GM’s consolidated U.S. federal income tax return and for certain states’ income tax returns, for financial reporting purposes, we are treated as if we were separately subject to U.S. federal, state and local income taxes. Accordingly, our financial statements recognize the current and deferred income tax consequences that result from our activities, including net operating losses, as if we were a separate taxpayer rather than a member of the parent company’s consolidated income tax group.

Income Taxes

6 Months Ended

Jun. 30, 2015

For interim income tax reporting we estimate our annual effective tax rate and apply it to our year-to-date ordinary income. Tax jurisdictions with a projected or year-to-date loss for which a tax benefit cannot be realized are excluded from the annualized effective tax rate. The tax effects of unusual or infrequently occurring items, including changes in judgment about valuation allowances and effects of changes in tax laws or rates, are reported in the interim period in which they occur.

In the three and six months ended June 30, 2015 income tax expense of $39 million and $103 million primarily resulted from tax expense attributable to entities included in our effective tax rate calculation, partially offset by tax benefits related to releases of uncertain tax positions in various jurisdictions and an increase in certain U.S. federal tax credits. In the three and six months ended June 30, 2014 income tax expense of $90 million and $167 million primarily resulted from tax expense attributable to entities included in our effective tax rate calculation.

Although we are included in GM’s consolidated U.S. federal income tax return and for certain states’ income tax returns, for financial reporting purposes, we are treated as if we were separately subject to U.S. federal, state and local income taxes. Accordingly, our financial statements recognize the current and deferred income tax consequences that result from our activities, including net operating losses, as if we were a separate taxpayer rather than a member of the parent company’s consolidated income tax group.