Consolidated 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, Reportable Data [Line Items]
Cost or Amortized Cost	$ 470,781
Estimated Fair Value	488,779
Fixed Maturities [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost or Amortized Cost	333,599
Estimated Fair Value	350,187
Amount at Which Shown on Balance Sheet	350,187
Foreign government debt securities [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost or Amortized Cost	50,717
Estimated Fair Value	54,437
Amount at Which Shown on Balance Sheet	54,437
U.S. Treasury and agency securities [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost or Amortized Cost	43,928
Estimated Fair Value	45,123
Amount at Which Shown on Balance Sheet	45,123
Public utilities [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost or Amortized Cost	27,512
Estimated Fair Value	29,897
Amount at Which Shown on Balance Sheet	29,897
State and political subdivision securities [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost or Amortized Cost	13,233
Estimated Fair Value	13,830
Amount at Which Shown on Balance Sheet	13,830
All other corporate bonds [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost or Amortized Cost	130,469
Estimated Fair Value	137,682
Amount at Which Shown on Balance Sheet	137,682
Total bonds [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost or Amortized Cost	265,859
Estimated Fair Value	280,969
Amount at Which Shown on Balance Sheet	280,969
Mortgage-backed and asset-backed securities [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost or Amortized Cost	65,740
Estimated Fair Value	67,176
Amount at Which Shown on Balance Sheet	67,176
Redeemable preferred stock [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost or Amortized Cost	2,000
Estimated Fair Value	2,042
Amount at Which Shown on Balance Sheet	2,042
Fair value option and trading securities [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost or Amortized Cost	16,403
Estimated Fair Value	17,423
Amount at Which Shown on Balance Sheet	17,423
Equity Securities, Investment Summary [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost or Amortized Cost	3,012
Estimated Fair Value	3,402
Amount at Which Shown on Balance Sheet	3,402
Industrial, miscellaneous and all others [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost or Amortized Cost	1,760
Estimated Fair Value	2,143
Amount at Which Shown on Balance Sheet	2,143
Banks, trust and insurance companies [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost or Amortized Cost	167
Estimated Fair Value	210
Amount at Which Shown on Balance Sheet	210
Non-redeemable preferred stock [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost or Amortized Cost	1,085
Estimated Fair Value	1,049
Amount at Which Shown on Balance Sheet	1,049
Mortgage loans, net [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost or Amortized Cost	57,706
Estimated Fair Value	57,706
Held-for-investment [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost or Amortized Cost	57,703
Estimated Fair Value	57,703
Held-for-sale [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost or Amortized Cost	3
Estimated Fair Value	3
Policy loans [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost or Amortized Cost	11,764
Estimated Fair Value	11,764
Real estate and real estate joint ventures [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost or Amortized Cost	10,267
Estimated Fair Value	10,267
Real estate acquired in satisfaction of debt [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost or Amortized Cost	445
Estimated Fair Value	445
Other limited partnership interests [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost or Amortized Cost	7,401
Estimated Fair Value	7,401
Short-term investments [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost or Amortized Cost	13,955
Estimated Fair Value	13,955
Other invested assets [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost or Amortized Cost	16,229
Estimated Fair Value	$ 16,229