Income Taxes	3 Months Ended
Income Taxes	Mar. 31, 2021
Income Tax Disclosure [Abstract]
Income Taxes	NOTE 3 — INCOME TAXES Our provisions for income taxes for the quarters ended March 31, 2021 and 2020 were $393 million and $112 million, respectively, and the effective tax rates were 21.7% and 16.2%, respectively. Our provision for income taxes included tax benefits related to settlements of employee equity awards of $74 million and $53 million for the quarters ended March 31, 2021 and 2020, respectively. Our liability for unrecognized tax benefits was $596 million, including accrued interest of $88 million, as of March 31, 2021 ($508 million and $73 million, respectively, as of December 31, 2020). Unrecognized tax benefits of $179 million ($157 million as of December 31, 2020) would affect the effective rate, if recognized. The Internal Revenue Service was conducting an examination of the Company’s 2016, 2017 and 2018 federal income tax returns at March 31, 2021. We are also subject to examination by state and foreign taxing authorities. Depending on the resolution of any federal, state and foreign tax disputes, the completion of examinations by federal, state or foreign taxing authorities, or the expiration of statutes of limitation for specific taxing jurisdictions, we believe it is reasonably possible that our liability for unrecognized tax benefits may significantly increase or decrease within the next 12 months. However, we are currently unable to estimate the range of any possible change.

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.