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	$ 78,628
Amount at which shown in the Balance Sheet	81,155
United States government, government agencies and authorities
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost	2,791
Fair value	2,913
Amount at which shown in the Balance Sheet	2,913
States, municipalities and political subdivisions
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost	8,446
Fair value	8,723
Amount at which shown in the Balance Sheet	8,723
Foreign government
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost	1,736
Fair value	1,824
Amount at which shown in the Balance Sheet	1,824
Public utilities
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost	6,284
Fair value	6,660
Amount at which shown in the Balance Sheet	6,660
Convertibles and bonds with warrants attached
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost	148
Fair value	113
Amount at which shown in the Balance Sheet	113
All other corporate bonds
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost	32,899
Fair value	33,830
Amount at which shown in the Balance Sheet	33,830
Asset-backed securities
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost	4,491
Fair value	4,518
Amount at which shown in the Balance Sheet	4,518
Residential mortgage-backed securities
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost	1,403
Fair value	1,474
Amount at which shown in the Balance Sheet	1,474
Commercial mortgage-backed securities
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost	788
Fair value	829
Amount at which shown in the Balance Sheet	829
Redeemable preferred stock
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost	22
Fair value	26
Amount at which shown in the Balance Sheet	26
Fixed income securities
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost	59,008
Fair value	60,910
Amount at which shown in the Balance Sheet	60,910
Public utilities
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost	373
Fair value	380
Amount at which shown in the Balance Sheet	380
Banks, trust and insurance companies
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost	300
Fair value	394
Amount at which shown in the Balance Sheet	394
Industrial, miscellaneous and all other
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost	3,755
Fair value	4,267
Amount at which shown in the Balance Sheet	4,267
Non-redeemable preferred stock
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost	45
Fair value	56
Amount at which shown in the Balance Sheet	56
Equity securities
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost	4,473
Fair value	5,097
Amount at which shown in the Balance Sheet	5,097
Mortgage loans on real estate
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost	4,721
Fair value	4,871
Amount at which shown in the Balance Sheet	4,721
Real estate
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost	126
Amount at which shown in the Balance Sheet	126
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	919
Amount at which shown in the Balance Sheet	919
Derivative instruments
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost	268
Fair value	269
Amount at which shown in the Balance Sheet	269
Limited partnership interests
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost	4,967
Amount at which shown in the Balance Sheet	4,967
Other long-term investments
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost	1,753
Amount at which shown in the Balance Sheet	1,753
Short-term investments
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost	2,393
Fair value	2,393
Amount at which shown in the Balance Sheet	$ 2,393