Income Taxes

6 Months Ended

Jun. 30, 2019

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes

Income tax expense was $65 million for the three months ended June 30, 2019, compared to $57 million for the same period of the prior year. The effective tax rate, expressed by calculating the income tax expense as a percentage of Income before income taxes, was 24.7% for both the three months ended June 30, 2019 and 2018 and differed from the US federal statutory rate of 21.0% primarily due to state income taxes partially offset by excess tax benefits on equity-based compensation.

Income tax expense was $103 million for the six months ended June 30, 2019, compared to $96 million for the same period of the prior year. The effective tax rate was 22.8% and 24.1% for the six months ended June 30, 2019 and 2018, respectively, and differed from the US federal statutory rate of 21.0% primarily due to state income taxes partially offset by excess tax benefits on equity-based compensation.