Quarterly Results of Operations (Unaudited)

12 Months Ended

Dec. 31, 2015

Quarterly Financial Information Disclosure [Abstract]

Quarterly Results of Operations (Unaudited)

The following table summarizes quarterly unaudited results of operations for the years ended December 31, 2015 and 2014.



	For The Quarter Ended
	March 31, 2015		June 30, 2015		September 30, 2015		December 31, 2015
	(In millions, except per-share data)
Premium revenue	$	2,971	$	3,304	$	3,377	$	3,589
Service revenue	52		47		47		107
Operating income	82		116		113		76
Income from continuing operations	28		39		46		30
Net income	28		39		46		30
Net income per share (1):
Basic	$	0.58	$	0.78	$	0.84	$	0.54
Diluted	$	0.56	$	0.72	$	0.77	$	0.52



	For The Quarter Ended
	March 31, 2014		June 30, 2014		September 30, 2014		December 31, 2014
	(In millions, except per-share data)
Premium revenue	$	1,940	$	2,167	$	2,317	$	2,599
Service revenue	54		50		52		54
Operating income	24		32		40		97
Income from continuing operations	4		8		16		34
Net income	4		8		16		34
Net income per share (1):
Basic	$	0.10	$	0.17	$	0.34	$	0.70
Diluted	$	0.09	$	0.16	$	0.33	$	0.69

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(1)

The dilutive effect of all potentially dilutive common shares is calculated using the treasury-stock method. Certain potentially dilutive common shares issuable are not included in the computation of diluted net income per share because to do so would be anti-dilutive. For the year ended December 31, 2014, the 1.125% Warrants were excluded from diluted shares outstanding because the exercise price exceeded the average market price of our common stock.