Income Taxes	6 Months Ended
Jun. 30, 2020
Income Tax Disclosure [Abstract]
Income Taxes	(11) Income Taxes Our effective income tax rates were 23.6% and 22.4% during the three-month periods ended June 30, 2020, and 2019, respectively, and 23.8% and 21.2% during the six-month periods ended June 30, 2020, and 2019, respectively. The increase in the effective tax rate during the three-month period ended June 30, 2020, as compared to the comparable quarter of 2019, was primarily due to a $4 million increase resulting from a favorable adjustment to the income tax provision related to the effects of a change in state tax law enacted during the second quarter of 2019. The increase in the effective tax rate during the six-month period ended June 30, 2020, compared with the same period in 2019, was primarily due to a $12 million unfavorable change in the tax benefit from employee share-based payments and a $4 million increase resulting from a favorable adjustment to the income tax provision related to the effects of a change in state tax law enacted during the second quarter of 2019, which increased our provision for income taxes by $1 million during the first six months of 2020 as compared to a $15 million tax benefit during the first six months of 2019. The global intangible low-taxed income (“GILTI”) provisions from the TCJA-17 require the inclusion of the earnings of certain foreign subsidiaries in excess of an acceptable rate of return on certain assets of the respective subsidiaries in our U.S. tax return for tax years beginning after December 31, 2017. An accounting policy election was made during 2018 to treat taxes related to GILTI as a period cost when the tax is incurred. We recorded a GILTI tax provision of zero and less than $1 million for the six months ended June 30, 2020 and 2019, respectfully. As of January 1, 2020, our unrecognized tax benefits were approximately $2 million. The amount, if recognized, that would favorably affect the effective tax rate is approximately $2 million. During the six months ended June 30, 2020, changes to the estimated liabilities for uncertain tax positions (including accrued interest) relating to tax positions taken during prior and current periods did not have a material impact on our financial statements. We recognize accrued interest and penalties associated with uncertain tax positions as part of the tax provision. As of June 30, 2020, we have less than $1 million of accrued interest and penalties. The U.S. federal statute of limitations remains open for 2016 and subsequent years. Foreign and U.S. state and local jurisdictions have statutes of limitations generally ranging from 3 to 4 years. The statute of limitations on certain jurisdictions could expire within the next twelve months. It is reasonably possible that the amount of uncertain tax benefits will change during the next 12 months, however, it is anticipated that any such change, if it were to occur, would not have a material impact on our results of operations. We operate in multiple jurisdictions with varying tax laws. We are subject to audits by any of these taxing authorities. Our tax returns have been examined by the Internal Revenue Service (“IRS”) through the year ended December 31, 2006. We believe that adequate accruals have been provided for federal, foreign and state taxes.

Income Taxes

6 Months Ended

Jun. 30, 2020

(11) Income Taxes

Our effective income tax rates were 23.6% and 22.4% during the three-month periods ended June 30, 2020, and 2019, respectively, and 23.8% and 21.2% during the six-month periods ended June 30, 2020, and 2019, respectively. The increase in the effective tax rate during the three-month period ended June 30, 2020, as compared to the comparable quarter of 2019, was primarily due to a $4 million increase resulting from a favorable adjustment to the income tax provision related to the effects of a change in state tax law enacted during the second quarter of 2019. The increase in the effective tax rate during the six-month period ended June 30, 2020, compared with the same period in 2019, was primarily due to a $12 million unfavorable change in the tax benefit from employee share-based payments and a $4 million increase resulting from a favorable adjustment to the income tax provision related to the effects of a change in state tax law enacted during the second quarter of 2019, which increased our provision for income taxes by $1 million during the first six months of 2020 as compared to a $15 million tax benefit during the first six months of 2019.

The global intangible low-taxed income (“GILTI”) provisions from the TCJA-17 require the inclusion of the earnings of certain foreign subsidiaries in excess of an acceptable rate of return on certain assets of the respective subsidiaries in our U.S. tax return for tax years beginning after December 31, 2017. An accounting policy election was made during 2018 to treat taxes related to GILTI as a period cost when the tax is incurred. We recorded a GILTI tax provision of zero and less than $1 million for the six months ended June 30, 2020 and 2019, respectfully.

As of January 1, 2020, our unrecognized tax benefits were approximately $2 million. The amount, if recognized, that would favorably affect the effective tax rate is approximately $2 million. During the six months ended June 30, 2020, changes to the estimated liabilities for uncertain tax positions (including accrued interest) relating to tax positions taken during prior and current periods did not have a material impact on our financial statements.

We recognize accrued interest and penalties associated with uncertain tax positions as part of the tax provision. As of June 30, 2020, we have less than $1 million of accrued interest and penalties. The U.S. federal statute of limitations remains open for 2016 and subsequent years. Foreign and U.S. state and local jurisdictions have statutes of limitations generally ranging from 3 to 4 years. The statute of limitations on certain jurisdictions could expire within the next twelve months. It is reasonably possible that the amount of uncertain tax benefits will change during the next 12 months, however, it is anticipated that any such change, if it were to occur, would not have a material impact on our results of operations.

We operate in multiple jurisdictions with varying tax laws. We are subject to audits by any of these taxing authorities. Our tax returns have been examined by the Internal Revenue Service (“IRS”) through the year ended December 31, 2006. We believe that adequate accruals have been provided for federal, foreign and state taxes.

- Definition

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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