SCHEDULE I - SUMMARY OF INVESTMENTS - OTHER THAN INVESTMENTS IN RELATED PARTIES (Details) $ in Millions	Dec. 31, 2016 USD ($)
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost	$ 58,051
Fair Value	59,194
Carrying Value	58,447
U.S. Treasury, government and agency
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost	10,739
Fair Value	10,336
Carrying Value	10,336
States and political subdivisions
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost	432
Fair Value	493
Carrying Value	493
Foreign Government Debt
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost	365
Fair Value	378
Carrying Value	378
Public Utility, Bonds
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost	3,437
Fair Value	3,617
Carrying Value	3,617
All Other Corporate Bonds
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost	16,663
Fair Value	17,224
Carrying Value	17,224
Redeemable preferred stock
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost	487
Fair Value	522
Carrying Value	522
Fixed maturities
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost	32,123
Fair Value	32,570
Carrying Value	32,570
Industrial, Miscellaneous, and All Others
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost	113
Fair Value	113
Carrying Value	113
Mortgage loans on real estate
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost	9,765
Fair Value	9,608
Carrying Value	9,757
Policy loans
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost	3,361
Fair Value	4,257
Carrying Value	3,361
Other Limited Partnership Interests And Equity Investments
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost	1,286
Fair Value	1,286
Carrying Value	1,286
Trading Securities
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost	9,177
Fair Value	9,134
Carrying Value	9,134
Other Invested Assets
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost	2,226
Fair Value	2,226
Carrying Value	$ 2,226

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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