Income Taxes

6 Months Ended

Jun. 30, 2019

Income Tax Disclosure [Abstract]

Income taxes

3. Income taxes

Our estimated annual effective tax rate is about 16%, which does not include discrete tax items. This differs from the 21% statutory corporate tax rate due to the effect of U.S. tax benefits.

Provision for income taxes is based on the following:

	For Three Months Ended						For Six Months Ended
	June 30,						June 30,
	2019			2018			2019			2018
Taxes calculated using the estimated annual effective tax rate	$	238		$	344		$	458		$	660
Discrete tax items		(29	)		(43	)		(89	)		(172	)
Provision for income taxes	$	209		$	301		$	369		$	488
Actual effective tax rate		14	%		18	%		13	%		15	%