Income Taxes	3 Months Ended
Mar. 31, 2019
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES Our effective income tax rate was 24% and 20% for the three months ended March 31, 2019 and 2018, respectively. The increase is primarily due to an increase in nondeductible compensation associated with stock-based compensation and a decrease in excludable income for state tax purposes. During the three months ended March 31, 2019, there was a de minimis change in our unrecognized tax benefits. The total amount of gross interest and penalties accrued was immaterial. It is reasonably possible the amount of the unrecognized benefit could increase or decrease within the next twelve months, which would have an impact on net income. We are subject to tax in U.S. federal and various state and local jurisdictions, as well as Canada. We are not subject to any material income tax examinations in federal or state jurisdictions for tax years prior to January 1, 2012. We previously paid Notices of Proposed Assessments disallowing employment tax credits totaling $11 million, plus interest of $4 million in connection with the IRS examination of Gevity HR, Inc. and its subsidiaries, which was acquired by TriNet in June 2009. TriNet filed suit in June 2016 to recover the disallowed credits, and the issue is being resolved through the litigation process. TriNet and the IRS filed cross motions for summary judgment in this matter in federal district court on February 27, 2018. On September 17, 2018, the district court granted our motion for summary judgment and denied the IRS’ motion. On January 18, 2019, the district court entered judgment in favor of TriNet in the amount of $15 million, plus interest. The IRS filed a notice of appeal of the district court’s decision on March 18, 2019. We will continue to vigorously defend our position through the litigation process.

INCOME TAXES

Our effective income tax rate was 24% and 20% for the three months ended March 31, 2019 and 2018, respectively. The increase is primarily due to an increase in nondeductible compensation associated with stock-based compensation and a decrease in excludable income for state tax purposes.

During the three months ended March 31, 2019, there was a de minimis change in our unrecognized tax benefits. The total amount of gross interest and penalties accrued was immaterial. It is reasonably possible the amount of the unrecognized benefit could increase or decrease within the next twelve months, which would have an impact on net income.

We are subject to tax in U.S. federal and various state and local jurisdictions, as well as Canada. We are not subject to any material income tax examinations in federal or state jurisdictions for tax years prior to January 1, 2012. We previously paid Notices of Proposed Assessments disallowing employment tax credits totaling $11 million, plus interest of $4 million in connection with the IRS examination of Gevity HR, Inc. and its subsidiaries, which was acquired by TriNet in June 2009. TriNet filed suit in June 2016 to recover the disallowed credits, and the issue is being resolved through the litigation process. TriNet and the IRS filed cross motions for summary judgment in this matter in federal district court on February 27, 2018. On September 17, 2018, the district court granted our motion for summary judgment and denied the IRS’ motion. On January 18, 2019, the district court entered judgment in favor of TriNet in the amount of $15 million, plus interest. The IRS filed a notice of appeal of the district court’s decision on March 18, 2019. We will continue to vigorously defend our position through the litigation process.