SCHEDULE I - SUMMARY OF INVESTMENTS - OTHER THAN INVESTMENTS IN RELATED PARTIES (Details) $ in Millions	Dec. 31, 2015 USD ($)
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost	$ 51,896
Fair Value	53,561
Carrying Value	52,527
U.S. Treasury, government and agency
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost	8,800
Fair Value	8,775
Carrying Value	8,775
States and political subdivisions
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost	437
Fair Value	504
Carrying Value	504
Foreign Government Debt
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost	387
Fair Value	403
Carrying Value	403
Public Utility, Bonds
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost	3,280
Fair Value	3,437
Carrying Value	3,437
All Other Corporate Bonds
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost	17,738
Fair Value	18,160
Carrying Value	18,160
Redeemable preferred stock
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost	559
Fair Value	614
Carrying Value	614
Fixed maturities
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost	31,201
Fair Value	31,893
Carrying Value	31,893
Industrial, Miscellaneous, and All Others
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost	34
Fair Value	32
Carrying Value	32
Mortgage loans on real estate
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost	7,171
Fair Value	7,257
Carrying Value	7,171
Policy loans
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost	3,393
Fair Value	4,343
Carrying Value	3,393
Other Limited Partnership Interests And Equity Investments
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost	1,443
Fair Value	1,443
Carrying Value	1,445
Trading Securities
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost	6,866
Fair Value	6,805
Carrying Value	6,805
Other Invested Assets
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost	1,788
Fair Value	1,788
Carrying Value	$ 1,788

This element represents the carrying (reported) amount of the entity's investments as of the balance sheet date. This amount may represent the individual investment's or group of similar investments' original cost, fair value, or such other amount at which the investment is shown in the entity's balance sheet.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 7
-Subparagraph (SX 210.12-15)
-URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611379-123010

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