SCHEDULE I - SUMMARY OF INVESTMENTS OTHER THAN INVESTMENTS IN RELATED PARTIES (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost	$ 36,529
Amount at which shown in the Balance Sheet	37,944
United States government, government agencies and authorities
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost	678
Fair value	766
Amount at which shown in the Balance Sheet	766
States, municipalities and political subdivisions
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost	3,135
Fair value	3,304
Amount at which shown in the Balance Sheet	3,304
Foreign government
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost	715
Fair value	792
Amount at which shown in the Balance Sheet	792
Public utilities
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost	4,810
Fair value	5,143
Amount at which shown in the Balance Sheet	5,143
Convertibles and bonds with warrants attached
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost	139
Fair value	106
Amount at which shown in the Balance Sheet	106
All other corporate bonds
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost	15,448
Fair value	16,067
Amount at which shown in the Balance Sheet	16,067
Asset-backed securities
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost	1,011
Fair value	1,007
Amount at which shown in the Balance Sheet	1,007
Residential mortgage-backed securities
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost	752
Fair value	790
Amount at which shown in the Balance Sheet	790
Commercial mortgage-backed securities
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost	724
Fair value	764
Amount at which shown in the Balance Sheet	764
Redeemable preferred stock
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost	15
Fair value	17
Amount at which shown in the Balance Sheet	17
Fixed income securities
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost	27,427
Fair value	28,756
Amount at which shown in the Balance Sheet	28,756
Public utilities
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost	34
Fair value	34
Amount at which shown in the Balance Sheet	34
Banks, trusts and insurance companies
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost	19
Fair value	20
Amount at which shown in the Balance Sheet	20
Industrial, miscellaneous and all other
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost	511
Fair value	595
Amount at which shown in the Balance Sheet	595
Nonredeemable preferred stocks
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost	1
Fair value	1
Amount at which shown in the Balance Sheet	1
Equity securities
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost	565
Fair value	650
Amount at which shown in the Balance Sheet	650
Mortgage loans on real estate
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost	4,173
Fair value	4,300
Amount at which shown in the Balance Sheet	4,173
Real estate investment
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost	46
Amount at which shown in the Balance Sheet	46
Real estate acquired in satisfaction of debt
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost	19
Amount at which shown in the Balance Sheet	19
Policy loans
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost	623
Amount at which shown in the Balance Sheet	623
Derivative instruments
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost	265
Fair value	266
Amount at which shown in the Balance Sheet	266
Limited partnership interests
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost	2,064
Amount at which shown in the Balance Sheet	2,064
Other long-term investments
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost	776
Amount at which shown in the Balance Sheet	776
Short-term investments
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost	590
Fair value	590
Amount at which shown in the Balance Sheet	$ 590