Income Taxes	9 Months Ended
Income Taxes	Sep. 30, 2020
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 nine months ended September 30, 2020, income tax expense of $314 million and $430 million was primarily due to tax expense attributable to entities included in our effective tax rate calculation. In the three and nine months ended September 30, 2019, income tax expense of $195 million and $416 million was primarily due to tax expense attributable to entities included in our effective tax rate calculation and a reduction for our electric vehicle tax credit in 2019. We are included in GM’s consolidated U.S. federal income tax return and for certain states’ income tax returns. Net operating losses and certain tax credits generated by us have been utilized by GM; however, income tax expense and deferred tax balances are presented in these financial statements as if we filed our own tax returns in each jurisdiction.

The entire disclosure for income taxes. Disclosures may 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.