Income Taxes	3 Months Ended
Income Taxes	Mar. 31, 2021
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes We determined our quarterly tax provision using the year-to-date effective tax rate because small changes in estimated ordinary annual income result in significant changes in our estimated annual effective tax rate. The year-to-date effective tax rate treats the year-to-date period as if it was the annual period and determines the income tax expense or benefit on that basis. For the three months ended March 31, 2021, we recognized tax expense of $23 million on a loss before income taxes of $87 million compared to tax expense of $44 million on a loss before income taxes of $914 million for the three months ended March 31, 2020. Our income tax provisions generally do not correlate to our consolidated income (loss) before tax. Our income taxes provisions are primarily driven by profits in certain jurisdictions, deemed profit countries and withholding taxes on intercompany and third-party transactions that do not directly correlate to ordinary income or loss. Impairments and other charges recognized do not result in significant tax benefit as a result of our inability to forecast realization of the tax benefit of such losses. Tax expense for the three months ended March 31, 2020 included $20 million to recognize valuation allowance in jurisdictions where we are no longer able to forecast taxable income as a result of our liquidity position as of March 31, 2020. We routinely undergo tax examination in various jurisdictions. We cannot predict the timing or outcome regarding resolution of these tax examinations or if they will have a material impact on our financial statements. As of March 31, 2021, we anticipate that it is reasonably possible that our uncertain tax positions of $233 million may decrease by up to $3 million in the next twelve months due to expiration of statutes of limitations, settlements and/or conclusions of tax examinations. In response to the COVID-19 pandemic, many countries have enacted tax relief measures to provide aid and economic stimulus to companies impacted by the COVID-19 pandemic. For the three months ended March 31, 2021, there were no material tax impacts to our Condensed Consolidated Financial Statements related to COVID-19 tax relief measures.

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.