Consolidated Statements of Stockholders' Equity $ in Millions	USD ($)
Balance, beginning of year at Dec. 31, 2012	$ 683
Balance, end of year at Dec. 31, 2013	683
Balance, beginning of year at Dec. 31, 2012	2,146
Additional Paid-In Capital
Stock-based compensation	(1)
Balance, end of year at Dec. 31, 2013	2,145
Balance, beginning of year at Dec. 31, 2012	8,774
Retained Earnings (Accumulated Deficit)
Dividends paid to common stockholders	(216)
Net income (loss)	937
Balance, end of year at Dec. 31, 2013	9,495
Accumulated other comprehensive income (loss), beginning balance at Dec. 31, 2012	831
Accumulated Other Comprehensive Income (Loss)
Other Comprehensive Income (Loss)	(389)
Accumulated other comprehensive income (loss), ending balance at Dec. 31, 2013	442
Balance, beginning of year at Dec. 31, 2012	(99)
Treasury Stock
Stock Based Compensation and Other	8
Balance, end of year at Dec. 31, 2013	(91)
Balance, beginning of year at Dec. 31, 2012	(21)
Notes Receivable for the Issuance of Common Stock
(Decrease) increase in notes receivable from the issuance of common stock	(2)
Balance, end of year at Dec. 31, 2013	(23)
Notes Receivable for the Issuance of Common Stock
Total stockholder's equty	12,651
Balance, end of year at Dec. 31, 2014	683
Additional Paid-In Capital
Stock-based compensation	6
Balance, end of year at Dec. 31, 2014	2,151
Retained Earnings (Accumulated Deficit)
Dividends paid to common stockholders	(541)
Net income (loss)	691	[1]
Balance, end of year at Dec. 31, 2014	9,645
Accumulated Other Comprehensive Income (Loss)
Other Comprehensive Income (Loss)	(42)
Accumulated other comprehensive income (loss), ending balance at Dec. 31, 2014	400
Treasury Stock
Stock Based Compensation and Other	7
Balance, end of year at Dec. 31, 2014	(84)
Notes Receivable for the Issuance of Common Stock
(Decrease) increase in notes receivable from the issuance of common stock	22
Balance, end of year at Dec. 31, 2014	(1)
Notes Receivable for the Issuance of Common Stock
Total stockholder's equty	12,794
Balance, end of year at Dec. 31, 2015	683
Additional Paid-In Capital
Stock-based compensation	2
Balance, end of year at Dec. 31, 2015	2,153
Retained Earnings (Accumulated Deficit)
Dividends paid to common stockholders	(811)
Net income (loss)	479	[2]
Balance, end of year at Dec. 31, 2015	9,313
Accumulated Other Comprehensive Income (Loss)
Other Comprehensive Income (Loss)	(715)
Accumulated other comprehensive income (loss), ending balance at Dec. 31, 2015	(315)
Treasury Stock
Stock Based Compensation and Other	6
Balance, end of year at Dec. 31, 2015	(78)
Notes Receivable for the Issuance of Common Stock
(Decrease) increase in notes receivable from the issuance of common stock	1
Balance, end of year at Dec. 31, 2015	0
Notes Receivable for the Issuance of Common Stock
Total stockholder's equty	$ 11,756

[1] Net income in the first quarter of 2014 included the impairment loss on the sale of CAC.

[2] Net income in the fourth quarter of 2015 included a charge related to recognition of a premium deficiency in our long term care business.