Consolidated Balance Sheets (Unaudited) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Investments:
Fixed maturity securities available-for-sale, at estimated fair value (amortized cost: $47,307 and $44,215, respectively)	$ 52,485	$ 47,781
Equity securities available-for-sale, at estimated fair value (cost: $293 and $295, respectively)	289	252
Other securities, at estimated fair value	8	3,665
Mortgage loans (net of valuation allowances of $41 and $61, respectively; includes $2,879 and $3,138, respectively, at estimated fair value, relating to variable interest entities)	9,394	9,800
Policy loans	1,227	1,203
Real estate and real estate joint ventures	540	503
Other limited partnership interests	1,839	1,696
Short-term investments, principally at estimated fair value	1,935	2,578
Other invested assets, principally at estimated fair value	3,140	3,354
Total investments	70,857	70,832
Cash and cash equivalents, principally at estimated fair value	1,316	745
Accrued investment income (includes $14 and $14, respectively, relating to variable interest entities)	628	568
Premiums, reinsurance and other receivables	20,740	20,223
Deferred policy acquisition costs and value of business acquired	3,871	4,188
Current income tax recoverable	335	140
Goodwill	559	953
Other assets	810	856
Separate account assets	84,543	72,559
Total assets	183,659	171,064
Liabilities
Future policy benefits	27,006	25,483
Policyholder account balances	37,550	42,075
Other policy-related balances	3,132	2,989
Payables for collateral under securities loaned and other transactions	9,467	8,079
Long-term debt (includes $2,790 and $3,065, respectively, at estimated fair value, relating to variable interest entities)	3,582	3,857
Deferred income tax liability	1,542	935
Other liabilities (includes $14 and $14, respectively, relating to variable interest entities)	6,195	5,384
Separate account liabilities	84,543	72,559
Total liabilities	173,017	161,361
Contingencies, Commitments and Guarantees (Note 9)
Stockholders' Equity
Common stock, par value $2.50 per share; 40,000,000 shares authorized; 34,595,317 shares issued and outstanding at September 30, 2012 and December 31, 2011	86	86
Additional paid-in capital	6,692	6,673
Retained earnings	1,339	1,173
Accumulated other comprehensive income (loss)	2,525	1,771
Total stockholders' equity	10,642	9,703
Total liabilities and stockholders' equity	$ 183,659	$ 171,064