Consolidated Balance Sheet (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Assets:
Cash and cash equivalents	$ 1,705	$ 1,324
Investments:
Fixed maturities, available for sale at fair value (amortized cost - $22,083 and $20,562)	24,118	21,807
Fixed maturities, trading at fair value	321	440
Equity securities, at fair value (cost - $778 and $744)	939	928
Mortgage loans	607	401
Policy loans	228	252
Real estate and other investments	531	425
Total cash and investments	28,449	25,577
Recoverables from reinsurers	3,750	2,942
Prepaid reinsurance premiums	471	409
Agents' balances and premiums receivable	636	565
Deferred policy acquisition costs	550	901
Assets of managed investment entities	3,225	3,058
Other receivables	539	895
Variable annuity assets (separate accounts)	580	548
Other assets	786	757
Goodwill	185	186
Total assets	39,171	35,838
Liabilities and Equity:
Unpaid losses and loss adjustment expenses	6,845	6,520
Unearned premiums	1,651	1,484
Annuity benefits accumulated	17,609	15,420
Life, accident and health reserves	2,059	1,727
Payable to reinsurers	475	475
Liabilities of managed investment entities	2,892	2,787
Long-term debt	953	934
Variable annuity liabilities (separate accounts)	580	548
Other liabilities	1,359	1,386
Total liabilities	34,423	31,281
Shareholders' equity:
Common Stock, no par value - 200,000,000 shares authorized - 88,979,303 and 97,846,402 shares outstanding	89	98
Capital surplus	1,063	1,121
Retained earnings:
Appropriated - managed investment entities	75	173
Unappropriated	2,520	2,439
Accumulated other comprehensive income, net of tax	831	580
Total shareholders' equity	4,578	4,411
Noncontrolling interests	170	146
Total equity	4,748	4,557
Total liabilities and equity	$ 39,171	$ 35,838