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Income Taxes	3 Months Ended
Income Taxes	Mar. 31, 2021
Income Tax Disclosure [Abstract]
INCOME TAXES	8. INCOME TAXES On March 27, 2020, the Coronavirus Aid, Relief and Economic Security (CARES) Act was enacted, which resulted in significant changes to the U.S. Internal Revenue Code of 1986, as amended. We recognized an overall income tax benefit of $616 million for the three months ended March 31, 2020, of which $110 million was attributable to the tax net operating loss (NOL) carryback provided for under the CARES Act of our 2020 tax NOL to our 2015 income tax year in which we paid federal income tax at a 35 percent tax rate. In addition, we were not limited in the amount of interest expense we could deduct. The remaining income tax benefit was primarily due to the LCM inventory valuation adjustment that resulted in a tax benefit of $551 million.

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.

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