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Derivative Instruments (Outstanding Derivative Instruments With Off-Balance-Sheet Risks) (Details) - USD ($) $ in Millions | Jun. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Outstanding derivative instruments with off-balance-sheet risks |  |  |
Notional Amounts |  | $ 128,031 |
Interest rate contracts [Member] |  |  |
Outstanding derivative instruments with off-balance-sheet risks |  |  |
Notional Amounts | [1] | 94,820 |
Foreign currency contracts [Member] |  |  |
Outstanding derivative instruments with off-balance-sheet risks |  |  |
Notional Amounts | [2] | 2,162 |
Equity market contracts [Member] |  |  |
Outstanding derivative instruments with off-balance-sheet risks |  |  |
Notional Amounts |  | 31,049 |
Total Derivative Instruments [Member] |  |  |
Outstanding derivative instruments with off-balance-sheet risks |  |  |
Notional Amounts |  | 128,031 | $ 110,350
Asset Fair Value |  | 2,456 | 2,563
Liability Fair Value |  | 2,400 | 2,563
Derivative investments [Member] | Interest rate contracts [Member] | Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member] |  |  |
Outstanding derivative instruments with off-balance-sheet risks |  |  |
Notional Amounts | [3] | 90,678 | 72,937
Asset Fair Value | [3] | 393 | 657
Liability Fair Value | [3] | 195 | 127
Derivative investments [Member] | Foreign currency contracts [Member] | Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member] |  |  |
Outstanding derivative instruments with off-balance-sheet risks |  |  |
Notional Amounts | [3] | 134 | 22
Derivative investments [Member] | Equity market contracts [Member] | Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member] |  |  |
Outstanding derivative instruments with off-balance-sheet risks |  |  |
Notional Amounts | [3] | 31,049 | 31,090
Asset Fair Value | [3] | 521 | 562
Liability Fair Value | [3] | 427 | 557
Derivative investments [Member] | Credit contracts [Member] | Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member] |  |  |
Outstanding derivative instruments with off-balance-sheet risks |  |  |
Notional Amounts | [3] |  | 52
Derivative investments [Member] | Cash Flow Hedges [Member] | Designated as Hedging Instrument [Member] |  |  |
Outstanding derivative instruments with off-balance-sheet risks |  |  |
Notional Amounts |  | 4,895 | 4,811
Asset Fair Value |  | 178 | 125
Liability Fair Value |  | 94 | 163
Derivative investments [Member] | Cash Flow Hedges [Member] | Interest rate contracts [Member] | Designated as Hedging Instrument [Member] |  |  |
Outstanding derivative instruments with off-balance-sheet risks |  |  |
Notional Amounts | [3] | 2,867 | 3,007
Asset Fair Value | [3] | 85 | 46
Liability Fair Value | [3] | 21 | 84
Derivative investments [Member] | Cash Flow Hedges [Member] | Foreign currency contracts [Member] | Designated as Hedging Instrument [Member] |  |  |
Outstanding derivative instruments with off-balance-sheet risks |  |  |
Notional Amounts | [3] | 2,028 | 1,804
Asset Fair Value | [3] | 93 | 79
Liability Fair Value | [3] | 73 | 79
Derivative investments [Member] | Fair Value Hedges [Member] | Interest rate contracts [Member] | Designated as Hedging Instrument [Member] |  |  |
Outstanding derivative instruments with off-balance-sheet risks |  |  |
Notional Amounts | [3] | 1,275 | 1,438
Asset Fair Value | [3] | 46 | 254
Liability Fair Value | [3] | 128 | 174
Other Assets [Member] | GLB Direct Embedded Derivatives [Member] | Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member] |  |  |
Outstanding derivative instruments with off-balance-sheet risks |  |  |
Asset Fair Value | [4],[5] | 1,248 | 903
Other Liabilities [Member] | GLB Ceded Embedded Derivatives [Member] | Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member] |  |  |
Outstanding derivative instruments with off-balance-sheet risks |  |  |
Asset Fair Value | [4],[5] | 41 | 51
Liability Fair Value | [4],[5] | 131 | 67
Reinsurance related embedded derivatives [Member] | Embedded derivatives - Reinsurance related [Member] | Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member] |  |  |
Outstanding derivative instruments with off-balance-sheet risks |  |  |
Liability Fair Value | [6] | 25 | 57
Future Contract Benefits [Member] | Indexed Annuity And Embedded Derivatives [Member] | Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member] |  |  |
Outstanding derivative instruments with off-balance-sheet risks |  |  |
Asset Fair Value | [4],[7] | 29 | 11
Liability Fair Value | [4],[7] | $ 1,400 | $ 1,418
[1] | As of June 30, 2018, the latest maturity date for which we were hedging our exposure to the variability in future cash flows for these instruments was April 2067.
[2] | As of June 30, 2018, the latest maturity date for which we were hedging our exposure to the variability in future cash flows for these instruments was September 2049.
[3] | Reported in derivative investments and other liabilities on our Consolidated Balance Sheets.
[4] | Reported in other assets on our Consolidated Balance Sheets.
[5] | Reported in other liabilities on our Consolidated Balance Sheets.
[6] | Reported in reinsurance related embedded derivatives on our Consolidated Balance Sheets.
[7] | Reported in future contract benefits on our Consolidated Balance Sheets.

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