Consolidated Summary of Investments - Other Than Investments in Related Parties (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Investments:
Amortized cost of fixed maturity securities available-for-sale	$ 340,870	$ 329,811
Fixed maturity securities relating to variable interest entities	374,266	350,271
Cost of trading securities	16,496
Trading and other securities relating to variable interest entities	16,348
Cost of equity securities available-for-sale	2,838
Equity securities	2,891	3,023
Mortgage loans:
Mortgage loans, at estimated fair value, relating to variable interest entities	56,592	56,915
Held-for-sale, principally at estimated fair value (includes $49 and $10,716, respectively, under the fair value option)	414	15,178
Mortgage loans, net	57,006	72,093
Policy loans	11,884	11,892
Real estate and real estate joint ventures	9,430
Real estate acquired in satisfaction of debt	488
Other limited partnership interests relating to variable interest entities	6,688	6,378
Short-term investments, principally at estimated fair value	16,906	17,310
Other invested assets relating to variable interest entities	21,145	23,581
Total Investments	483,751
Total investments	517,052	511,379
Foreign government debt securities [Member]
Investments:
Amortized cost of fixed maturity securities available-for-sale	51,967
Fixed maturity securities relating to variable interest entities	57,336
U.S. Treasury and agency securities [Member]
Investments:
Amortized cost of fixed maturity securities available-for-sale	41,874
Fixed maturity securities relating to variable interest entities	47,967
Public Utility, Bonds [Member]
Investments:
Amortized cost of fixed maturity securities available-for-sale	28,110
Fixed maturity securities relating to variable interest entities	32,200
Cost of equity securities available-for-sale	0
Equity securities	0
State and political subdivision securities [Member]
Investments:
Amortized cost of fixed maturity securities available-for-sale	12,949
Fixed maturity securities relating to variable interest entities	15,048
All Other Corporate Bonds [Member]
Investments:
Amortized cost of fixed maturity securities available-for-sale	134,062
Fixed maturity securities relating to variable interest entities	146,796
Total Bonds [Member]
Investments:
Amortized cost of fixed maturity securities available-for-sale	268,962
Fixed maturity securities relating to variable interest entities	299,347
Mortgage-backed and asset-backed securities [Member]
Investments:
Amortized cost of fixed maturity securities available-for-sale	69,605
Fixed maturity securities relating to variable interest entities	72,605
Redeemable preferred stock [Member]
Investments:
Amortized cost of fixed maturity securities available-for-sale	2,303
Fixed maturity securities relating to variable interest entities	2,314
Other fixed maturity securities [Member]
Investments:
Amortized cost of fixed maturity securities available-for-sale	0
Fixed maturity securities relating to variable interest entities	0
Non-redeemable preferred stock [Member]
Investments:
Cost of equity securities available-for-sale	804
Equity securities	729
Industrial, Miscellaneous, and All Others [Member]
Investments:
Cost of equity securities available-for-sale	1,863
Equity securities	1,978
Financial Services Industry [Member]
Investments:
Cost of equity securities available-for-sale	171
Equity securities	$ 184

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