Selected Quarterly Financial Information (unaudited)

12 Months Ended

Dec. 31, 2017

Quarterly Financial Information Disclosure [Abstract]

Selected Quarterly Financial Information (unaudited)

Note 19: Selected Quarterly Financial Information (unaudited)

The following table sets forth the historical unaudited quarterly financial data for the periods indicated. The information for each of these periods has been prepared on the same basis as the audited consolidated financial statements and, in our opinion, reflects all adjustments necessary to present fairly our financial results. Operating results for previous periods do not necessarily indicate results that may be achieved in any future period.

	2017
	First Quarter		Second Quarter		Third Quarter		Fourth Quarter			Year
	(in millions)
Revenues	$	684	$	733	$	688		$	686		$	2,791
Operating income		94		123		89			65			371
Net income		2,350		115		105			61			2,631
Net income attributable to stockholders		2,350		112		103			60			2,625
Earnings per share - Basic⁽¹⁾		11.65		0.52		0.48			0.28			12.38
Earnings per share - Diluted⁽¹⁾		11.02		0.52		0.48			0.28			12.21

⁽¹⁾	Per share amounts are calculated based on unrounded numbers and are calculated independently for each period presented, therefore, the sum of the quarterly EPS does not equal the EPS for the full year.

	2016
	First Quarter		Second Quarter		Third Quarter			Fourth Quarter			Year
	(in millions)
Revenues	$	661	$	725		$	671		$	670		$	2,727
Operating income		80		142			110			87			419
Net income		23		62			37			17			139
Net income attributable to stockholders		22		60			34			17			133
Earnings per share - Basic⁽¹⁾		0.11		0.30			0.17			0.09			0.67
Earnings per share - Diluted⁽¹⁾		0.11		0.30			0.17			0.09			0.67

⁽¹⁾	Basic and diluted earnings per share were calculated using the number of shares of common stock outstanding upon the completion of the spin-off. Per share amounts are calculated based on unrounded numbers and are calculated independently for each period presented.