Consolidated Balance Sheet (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Assets
Fixed maturities, available for sale, at fair value (amortized cost $60,829 and $59,994)	$ 65,393	$ 64,232
Equity securities, available for sale, at fair value (cost $462 and $414)	645	559
Real estate investments	883	865
Short-term securities	3,483	3,594
Other investments	3,434	3,451
Total investments	73,838	72,701
Cash	330	214	200	255
Investment income accrued	752	768
Premiums receivable	5,872	5,730
Reinsurance recoverables	10,712	11,155
Ceded unearned premiums	856	828
Deferred acquisition costs	1,792	1,786	1,782
Deferred taxes		7
Contractholder receivables	4,806	5,186
Goodwill	3,365	3,365
Other intangible assets	381	433
Other assets	2,234	2,402
Total assets	104,938	104,575
Liabilities
Claims and claim adjustment expense reserves	50,922	51,392	51,581
Unearned premium reserves	11,241	11,102	10,921
Contractholder payables	4,806	5,186
Payables for reinsurance premiums	346	389
Deferred taxes	338
Debt	6,350	6,605
Other liabilities	5,530	5,424
Total liabilities	79,533	80,098
Shareholders' equity
Common stock (1,750.0 shares authorized; 377.4 and 392.8 shares issued and outstanding)	21,161	20,732	20,162	19,593
Retained earnings	21,352	19,579	18,847	16,315
Accumulated other comprehensive income	2,236	2,005	1,255	1,219
Treasury stock, at cost (372.3 and 349.0 shares)	(19,344)	(17,839)	(14,857)	(9,791)
Total shareholders' equity	25,405	24,477	25,475
Total liabilities and shareholders' equity	$ 104,938	$ 104,575