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Income Taxes (Notes) | 6 Months Ended
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Jun. 30, 2022
Income Tax Disclosure [Abstract] |
Income Tax Disclosure [Text Block] | 10. INCOME TAXES We adjust our effective tax rate each quarter based on our estimated annual effective tax rate. We also record the tax impact of certain discrete, unusual or infrequently occurring items, including changes in judgment about valuation allowances and the effects of changes in tax laws or rates on deferred tax balances, in the interim period in which they occur. In addition, jurisdictions with a projected loss for the year or a year-to-date loss where no tax benefit can be recognized are excluded from the estimated annual effective tax rate. The impact of such an exclusion could result in a higher or lower effective tax rate during a particular quarter, based upon the mix and timing of actual earnings versus annual projections. Our income tax expense and effective income tax rate for the three and six months ended June 30, 2022 and 2021 are as follows:
|  | Three Months Ended |  | Six Months Ended
|  | June 30, |  | June 30,
|  | 2022 |  | 2021 |  | 2022 |  | 2021
|  | (in millions)
Income tax expense |  | $ | 0.6 |  |  | $ | 2.4 |  |  | $ | 3.6 |  |  | $ | 11.2 |
Effective income tax rate |  | 2.6 | % |  | 13.0 | % |  | 13.1 | % |  | 17.0 | %
Our effective income tax rates for the three and six months ended June 30, 2022 vary from our effective income tax rates for the three and six months ended June 30, 2021 primarily as a result of the $11.6 million gain on bargain purchase of business, recognized in both the three and six months ended June 30, 2022, which was not subject to tax, as well as the mix of earnings on a jurisdictional basis. For the three and six months ended June 30, 2022 and 2021, our effective income tax rates are lower than the U.S. federal statutory rate of 21% primarily due to the gain on bargain purchase of business, a benefit from foreign derived intangible income deduction, the change in jurisdictional mix of earnings, as well as favorable foreign tax rates and the impact of tax credits. In accordance with the guidance in ASC 740 - Income Taxes, we review the likelihood that we will realize the benefit of deferred tax assets and estimate whether recoverability of our deferred tax assets is "more likely than not" based on the available evidence. Due to the uncertainty associated with the extent and ultimate impact of the significant supply chain constraints affecting the automotive industry, including COVID-19, the semiconductor shortage and resulting impact on global automotive production volumes, and the conflict between Russia and Ukraine, we may experience lower than projected earnings in certain jurisdictions in future periods, and as a result, it is reasonably possible that changes in valuation allowances could be recognized in future periods and such changes could be material to our financial statements. Other Income Tax Matters We operate in multiple jurisdictions throughout the world and the income tax returns of several subsidiaries in various tax jurisdictions are currently under examination. During their examination of our 2015 U.S. federal income tax return, the Internal Revenue Service (IRS) asserted that income earned by a Luxembourg subsidiary from its Mexican branch operations should be categorized as foreign base company sales income (FBCSI) under Section 954(d) of the Internal Revenue Code and recognized currently as taxable income on our 2015 U.S. federal income tax return. As a result of this assertion, the IRS issued a Notice of Proposed Adjustment (NOPA). AAM believes that the proposed adjustment is without merit and we have contested the matter, which is currently under review in the IRS’s administrative appeals process. We believe it is likely that we will be successful in ultimately defending our position. As such, we have not recorded any impact of the IRS’s proposed adjustment in our condensed consolidated financial statements. In the event AAM is not successful in defending its position, the potential additional income tax expense, including estimated interest charges, related to tax years 2015 through 2021, is estimated to be in the range of approximately $275 million to $325 million. The cash flow impact in 2022 related to this issue is not expected to be significant as a result of available net operating losses and income tax credits. In a matter of related interest, in May 2020, the U.S Tax Court ruled against another U.S. corporation, finding that the income it earned through a Mexican branch of its Luxembourg subsidiary corporation was FBCSI. In that situation, the taxpayer appealed the U.S. Tax Court decision to the U.S. Court of Appeals for the Sixth Circuit. In December 2021, the U.S. Court of Appeals affirmed, in a split decision, the Tax Court decision in favor of the IRS. In January 2022, the taxpayer in the above referenced matter filed a petition for rehearing and this petition was denied by the U.S. Court of Appeals for the Sixth Circuit in March 2022. In June 2022, the taxpayer filed a petition with the United States Supreme Court to review the judgment of the U.S. Court of Appeals for the Sixth Circuit and this petition is pending. Notwithstanding the decisions rendered thus far in that case, and because our position is based upon different facts and circumstances, including but not limited to, differences in structure, and different income tax regulations in effect for our tax years under examination, we continue to believe, after consultation with tax and legal counsel that it is more likely than not that our structure does not give rise to FBCSI. We intend to continue to vigorously contest the conclusions reached in the NOPA through the IRS’s administrative appeals process, and, if necessary, through litigation. Negative or unexpected outcomes of tax examinations and audits, and any related litigation, could have a material adverse impact on our results of operations, financial condition and cash flows. We will continue to monitor the progress and conclusions of all ongoing audits and other communications with tax authorities and will adjust our estimated liability as necessary. On June 1, 2022, our acquisition of Tekfor became effective and we recorded a liability for unrecognized income tax benefits of $12.6 million as of June 1, 2022 associated with the acquired entities. As of June 30, 2022 and December 31, 2021, we have recorded a liability for unrecognized income tax benefits and related interest and penalties of $36.4 million and $23.4 million, respectively.

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