Investments (Details 4) (USD $) In Millions, unless otherwise specified	Jun. 30, 2011	Dec. 31, 2010
Major industry types that comprise the corporate fixed maturity securities holdings
Fixed maturity securities available-for-sale, at estimated fair value (amortized cost: $330,903 and $317,617, respectively; includes $3,357 and $3,330, respectively, relating to variable interest entities)	$ 341,744	$ 324,797
Foreign corporate securities [Member]
Major industry types that comprise the corporate fixed maturity securities holdings
Fixed maturity securities available-for-sale, at estimated fair value (amortized cost: $330,903 and $317,617, respectively; includes $3,357 and $3,330, respectively, relating to variable interest entities)	70,538	67,888
% of Total	42.20%	42.50%
Corporate fixed maturity securities [Member]
Major industry types that comprise the corporate fixed maturity securities holdings
Fixed maturity securities available-for-sale, at estimated fair value (amortized cost: $330,903 and $317,617, respectively; includes $3,357 and $3,330, respectively, relating to variable interest entities)	167,335	159,660
% of Total	100.00%	100.00%
Other domestic corporate fixed maturity securities [Member]
Major industry types that comprise the corporate fixed maturity securities holdings
Fixed maturity securities available-for-sale, at estimated fair value (amortized cost: $330,903 and $317,617, respectively; includes $3,357 and $3,330, respectively, relating to variable interest entities)	3,245	3,198
% of Total	1.90%	2.00%
Consumer Domestic Corporate Debt Securities [Member]
Major industry types that comprise the corporate fixed maturity securities holdings
Fixed maturity securities available-for-sale, at estimated fair value (amortized cost: $330,903 and $317,617, respectively; includes $3,357 and $3,330, respectively, relating to variable interest entities)	22,910	21,482
% of Total	13.70%	13.50%
Industrial Domestic Corporate Debt Securities [Member]
Major industry types that comprise the corporate fixed maturity securities holdings
Fixed maturity securities available-for-sale, at estimated fair value (amortized cost: $330,903 and $317,617, respectively; includes $3,357 and $3,330, respectively, relating to variable interest entities)	24,270	22,070
% of Total	14.50%	13.80%
Utility Domestic Corporate Debt Securities [Member]
Major industry types that comprise the corporate fixed maturity securities holdings
Fixed maturity securities available-for-sale, at estimated fair value (amortized cost: $330,903 and $317,617, respectively; includes $3,357 and $3,330, respectively, relating to variable interest entities)	18,242	16,902
% of Total	10.90%	10.60%
Finance Domestic Corporate Debt Securities [Member]
Major industry types that comprise the corporate fixed maturity securities holdings
Fixed maturity securities available-for-sale, at estimated fair value (amortized cost: $330,903 and $317,617, respectively; includes $3,357 and $3,330, respectively, relating to variable interest entities)	20,397	20,785
% of Total	12.20%	13.00%
Communications Domestic Corporate Debt Securities [Member]
Major industry types that comprise the corporate fixed maturity securities holdings
Fixed maturity securities available-for-sale, at estimated fair value (amortized cost: $330,903 and $317,617, respectively; includes $3,357 and $3,330, respectively, relating to variable interest entities)	$ 7,733	$ 7,335
% of Total	4.60%	4.60%

Investments (Details 4) (USD $)
In Millions, unless otherwise specified

Jun. 30, 2011

Dec. 31, 2010

Major industry types that comprise the corporate fixed maturity securities holdings

Fixed maturity securities available-for-sale, at estimated fair value (amortized cost: $330,903 and $317,617, respectively; includes $3,357 and $3,330, respectively, relating to variable interest entities)

$ 341,744

$ 324,797

Foreign corporate securities [Member]

Major industry types that comprise the corporate fixed maturity securities holdings

70,538

67,888

% of Total

42.20%

42.50%

Corporate fixed maturity securities [Member]

Major industry types that comprise the corporate fixed maturity securities holdings

167,335

159,660

% of Total

100.00%

Other domestic corporate fixed maturity securities [Member]

Major industry types that comprise the corporate fixed maturity securities holdings

3,245

3,198

% of Total

1.90%

2.00%

Consumer Domestic Corporate Debt Securities [Member]

Major industry types that comprise the corporate fixed maturity securities holdings

22,910

21,482

% of Total

13.70%

13.50%

Industrial Domestic Corporate Debt Securities [Member]

Major industry types that comprise the corporate fixed maturity securities holdings

24,270

22,070

% of Total

14.50%

13.80%

Utility Domestic Corporate Debt Securities [Member]

Major industry types that comprise the corporate fixed maturity securities holdings

18,242

16,902

% of Total

10.90%

10.60%

Finance Domestic Corporate Debt Securities [Member]

Major industry types that comprise the corporate fixed maturity securities holdings

20,397

20,785

% of Total

12.20%

13.00%

Communications Domestic Corporate Debt Securities [Member]

Major industry types that comprise the corporate fixed maturity securities holdings

$ 7,733

$ 7,335

% of Total

4.60%

- Definition

For an unclassified balance sheet, total of debt securities categorized neither as held-to-maturity nor trading. Such securities are reported at fair value; unrealized gains and losses of such securities are excluded from earnings and included in other comprehensive income, a separate component of shareholders' equity, unless the Available-for-sale Security is designated as a hedge or is determined to have had an other than temporary decline in fair value below its amortized cost basis. All or a portion of the unrealized holding gain or loss of an Available-for-sale Security that is designated as being hedged in a fair value hedge shall be recognized in earnings during the period of the hedge, as should other than temporary declines in fair value below costs basis.

+ References+ Details