Income Taxes

6 Months Ended

Jun. 30, 2019

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes

The provision for income taxes in interim periods requires us to make a best estimate of the effective tax rate expected to be applicable for the full year, adjusted for any discrete items for the applicable period. This estimated effective tax rate is then applied to interim consolidated pre-tax operating income to determine the interim provision for income taxes.

The following table presents our provision for income tax and effective tax provision rate:

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
	(Dollars in millions)
Provision for income taxes	$	14		$	12		$	22		$	21
Effective tax provision rate	18.9		%	20.4		%	18.7		%	20.2		%

We believe that it is unlikely that our unrecognized tax benefits will change by a material amount during the next 12 months. We recognize interest and penalties related to unrecognized tax benefits in provision for income taxes.