Income Taxes (Tables)

3 Months Ended

Mar. 31, 2019

Income Tax Disclosure [Abstract]

Schedule of Income Taxes and Effective Tax Rate

The following summarizes income tax expense (benefit) and effective tax rates:

	Three Months Ended
	March 31,
millions except percentages	2019			2018
Current income tax expense (benefit)	$	168		$	90
Deferred income tax expense (benefit)	(2		)	36
Total income tax expense (benefit)	$	166		$	126
Income (loss) before income taxes	262			300
Effective tax rate	63		%	42		%