Consolidated Balance Sheet (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Assets
Fixed maturities, available for sale, at fair value (amortized cost $60,801 and $62,196)	$ 63,474	$ 63,956
Equity securities, available for sale, at fair value (cost $579 and $686)	899	943
Real estate investments	938	938
Short-term securities	4,364	3,882
Other investments	3,586	3,441
Total investments	73,261	73,160
Cash	374	294	330	214
Investment income accrued	685	734
Premiums receivable	6,298	6,125
Reinsurance recoverables	9,260	9,713
Ceded unearned premiums	678	801
Deferred acquisition costs	1,835	1,804	1,792
Deferred taxes	33	303
Contractholder receivables	4,362	4,328
Goodwill	3,611	3,634
Other intangible assets	304	351
Other assets	2,377	2,565
Total assets	103,078	103,812
Liabilities
Claims and claim adjustment expense reserves	49,850	50,895	50,922
Unearned premium reserves	11,839	11,850	11,241
Contractholder payables	4,362	4,328
Payables for reinsurance premiums	336	298
Debt	6,349	6,346
Other liabilities	5,506	5,299
Total liabilities	78,242	79,016
Shareholders' equity
Common stock (1,750.0 shares authorized; 322.2 and 353.5 shares issued and outstanding)	21,843	21,500	21,161	20,732
Retained earnings	27,251	24,291	21,352	19,579
Accumulated other comprehensive income	880	810	2,236	2,005
Treasury stock, at cost (437.3 and 401.5 shares)	(25,138)	(21,805)	(19,344)	(17,839)
Total shareholders' equity	24,836	24,796	25,405
Total liabilities and shareholders' equity	$ 103,078	$ 103,812