Income Taxes	9 Months Ended
Income Taxes	Sep. 30, 2020
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Our effective tax rate was 24% and 20% for the nine months ended September 30, 2020 and 2019, respectively, and 32% and 16% for the three months ended September 30, 2020 and 2019, respectively. The effective tax rates for the nine and three months ended September 30, 2020 are higher than the effective tax rates for the comparable periods in 2019 primarily due to U.K. tax law changes enacted in July 2020, partially offset by favorable state apportionment changes as a result of our acquisition of Ellie Mae, as well as favorable changes in certain international tax provisions as part of the U.S. Federal Tax Cuts and Jobs Act, or TCJA, during the three months ended September 30, 2019. In 2015 and 2016, the U.K. enacted corporate income tax rate reductions from 19% to 17% to be effective prospectively on April 1, 2020 and we recorded associated deferred tax benefits in those years. In July 2020, the U.K. enacted a reinstatement of the U.K. corporate income tax rate back to 19%, effective April 1, 2020. As a result, we revalued our U.K. deferred tax assets and liabilities back to the rate of 19% and recorded an additional $65 million deferred tax expense during the three months ended September 30, 2020. We also reflected the rate change in our estimated annual effective tax rate during the three months ended September 30, 2020. On March 27, 2020, the Coronavirus Aid, Relief, and Economic Security Act, or CARES Act, was enacted and certain income tax related relief was provided under the CARES Act. There is no material impact of the CARES Act on our income tax provision for the nine and three months ended September 30, 2020.

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.