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Fair Value Measurements Level 4 Significant Unobservable Inputs (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Alternative Investments, Fair Value Disclosure |  | $ 2,874 |  | $ 2,942 |  |
Available-for-sale Securities, Debt Securities |  | 59,196 |  | 59,384 |  |
Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Available-for-sale Securities, Debt Securities |  | 3,313 |  | 3,475 |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs |  | 505 | [1] | 578 |  | $ 737
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings | [2],[3],[4] | 12 |  | 13 |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss) | [5] | (5) |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases |  | 394 |  | 339 |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements |  | (19) |  | 3 |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Sales |  | (265) |  | 201 |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3 | [1] | 12 |  | 37 |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers out of Level 3 | [1] | (202) |  | 344 |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Period Increase (Decrease) | [2],[6] | 11 |  | 8 |  |
Limited Partnerships and Other Alternative Investments [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs |  | 74 | [1] | 189 |  | $ 108
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings | [2],[3],[4] | (19) |  | 1 |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases |  | 55 |  | 130 |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements |  | 0 |  | 0 |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Sales |  | 20 |  | 24 |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3 | [1] |  |  | 53 |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers out of Level 3 | [1] | 131 |  | 79 |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Period Increase (Decrease) | [2],[6] | $ (19) |  | $ 1 |  |
Residential Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value Measurements, Valuation Techniques |  | Discounted cash flows |  | Discounted cash flows |  |
Residential Mortgage Backed Securities [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value Inputs, Loss Severity |  | 0.00% |  | 0.00% |  |
Fair Value Inputs, Probability of Default |  | 1.00% |  | 1.00% |  |
Fair Value Inputs, Prepayment Rate |  | 0.00% |  | 0.00% |  |
Fair Value Inputs, Counterparty Credit Risk |  | 30.00% |  | 23.00% |  |
Residential Mortgage Backed Securities [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value Inputs, Loss Severity |  | 0.00% |  | 100.00% |  |
Fair Value Inputs, Probability of Default |  | 10.00% |  | 14.00% |  |
Fair Value Inputs, Prepayment Rate |  | 20.00% |  | 7.00% |  |
Fair Value Inputs, Counterparty Credit Risk |  | 1696.00% |  | 1904.00% |  |
Residential Mortgage Backed Securities [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value Inputs, Loss Severity |  | 0.00% |  | 0.00% |  |
Fair Value Inputs, Probability of Default |  | 6.00% |  | 7.00% |  |
Fair Value Inputs, Prepayment Rate |  | 2.00% |  | 2.00% |  |
Fair Value Inputs, Counterparty Credit Risk |  | 178.00% | [7] | 142.00% | [8] |
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value Measurements, Valuation Techniques |  | Discounted cash flows |  | Discounted cash flows |  |
Fair Value Measurements, Significant Assumptions |  | Spread |  | Spread |  |
Fair Value Measurements, Sensitivity Analysis, Description | [8] | Decrease |  | Decrease |  |
US States and Political Subdivisions Debt Securities [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value Inputs, Treasury Yield |  | 193.00% |  | 212.00% |  |
US States and Political Subdivisions Debt Securities [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value Inputs, Treasury Yield |  | 193.00% |  | 212.00% |  |
US States and Political Subdivisions Debt Securities [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value Inputs, Treasury Yield |  | 193.00% | [7] | 212.00% | [8] |
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value Measurements, Valuation Techniques |  | Discounted cash flows |  | Discounted cash flows |  |
Fair Value Measurements, Significant Assumptions |  | Spread |  | Spread |  |
Fair Value Measurements, Sensitivity Analysis, Description | [8] | Decrease |  | Decrease |  |
Corporate Debt Securities [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value Inputs, Counterparty Credit Risk |  | 63.00% |  | 123.00% |  |
Corporate Debt Securities [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value Inputs, Counterparty Credit Risk |  | 800.00% |  | 765.00% |  |
Corporate Debt Securities [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value Inputs, Counterparty Credit Risk |  | 306.00% | [7] | 279.00% | [8] |
Commercial Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value Measurements, Valuation Techniques |  | Discounted cash flows |  | Discounted cash flows |  |
Fair Value Measurements, Significant Assumptions |  | Spread (encompasses prepayment, default risk and loss severity) |  | Spread (encompasses prepayment, default risk and loss severity) |  |
Fair Value Measurements, Sensitivity Analysis, Description | [8] | Decrease |  | Decrease |  |
Commercial Mortgage Backed Securities [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value Inputs, Counterparty Credit Risk |  | 31.00% |  | 46.00% |  |
Commercial Mortgage Backed Securities [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value Inputs, Counterparty Credit Risk |  | 1505.00% |  | 2475.00% |  |
Commercial Mortgage Backed Securities [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value Inputs, Counterparty Credit Risk |  | 266.00% | [7] | 284.00% | [8] |
Residential Mortgage Backed Securities [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Available-for-sale Securities, Debt Securities |  | $ 4,046 |  | $ 3,918 |  |
Residential Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Available-for-sale Securities, Debt Securities |  | 1,622 |  | 1,281 |  |
US States and Political Subdivisions Debt Securities [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Available-for-sale Securities, Debt Securities |  | 12,121 |  | 12,871 |  |
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Available-for-sale Securities, Debt Securities |  | 49 |  | 66 |  |
Corporate Debt Securities [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Available-for-sale Securities, Debt Securities |  | 26,802 |  | 27,359 |  |
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Available-for-sale Securities, Debt Securities |  | 854 |  | 1,040 |  |
Commercial Mortgage Backed Securities [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Available-for-sale Securities, Debt Securities |  | 4,717 |  | 4,415 |  |
Commercial Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Available-for-sale Securities, Debt Securities |  | $ 150 |  | 284 |  |
Fair Value, Measurements, Recurring [Member] | Limited Partnerships and Other Alternative Investments [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value Measurements, Valuation Processes, Description |  | The predominant valuation method uses a NAV calculated on a monthly basis and represents funds where the Company does not have the ability to redeem the investment in the near-term at that NAV, including an assessment of the investee's liquidity. |  |  |  |
Fair Value, Measurements, Recurring [Member] | Residential Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Available-for-sale Securities, Debt Securities |  | $ 1,622 |  | 1,281 |  |
Fair Value, Measurements, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member] | Non-Broker Priced [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Available-for-sale Securities, Debt Securities | [9] | 31 |  | 32 |  |
Fair Value, Measurements, Recurring [Member] | Corporate Debt Securities [Member] | Non-Broker Priced [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Available-for-sale Securities, Debt Securities | [9] | 339 |  | 568 |  |
Fair Value, Measurements, Recurring [Member] | Commercial Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Available-for-sale Securities, Debt Securities |  | $ 122 |  | $ 284 |  |
Spread [Member] | Residential Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value Measurements, Significant Assumptions |  | Spread |  | Spread |  |
Fair Value Measurements, Sensitivity Analysis, Description | [8] | Decrease |  | Decrease |  |
Prepayment Rate [Member] | Residential Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value Measurements, Significant Assumptions |  | Constant prepayment rate |  | Constant prepayment rate |  |
Fair Value Measurements, Sensitivity Analysis, Description | [8],[10] | Decrease [4] |  | Decrease [4] |  |
Probability of Default [Member] | Residential Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value Measurements, Significant Assumptions |  | Constant default rate |  | Constant default rate |  |
Fair Value Measurements, Sensitivity Analysis, Description | [8] | Decrease |  | Decrease |  |
Loss Severity [Member] | Residential Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value Measurements, Significant Assumptions |  | Loss severity |  | Loss severity |  |
Fair Value Measurements, Sensitivity Analysis, Description | [8] | Decrease |  | Decrease |  |
Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member] | Withdrawal Utilization [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value Measurements, Sensitivity Analysis, Description | [11] | Increase |  |  |  |
Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member] | Withdrawal Utilization [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value Unobservable Input Range | [12] | 20.00% |  |  |  |
Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member] | Withdrawal Utilization [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value Unobservable Input Range | [12] | 100.00% |  |  |  |
Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member] | Withdrawal Rates [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value Measurements, Sensitivity Analysis, Description | [11] | Increase |  |  |  |
Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member] | Withdrawal Rates [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value Unobservable Input Range | [13] | 0.00% |  |  |  |
Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member] | Withdrawal Rates [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value Unobservable Input Range | [13] | 8.00% |  |  |  |
Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member] | Lapse Rates [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value Measurements, Sensitivity Analysis, Description | [11] | Decrease |  |  |  |
Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member] | Lapse Rates [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value Unobservable Input Range | [14] | 0.00% |  |  |  |
Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member] | Lapse Rates [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value Unobservable Input Range | [14] | 75.00% |  |  |  |
Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member] | Reset Elections [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value Measurements, Sensitivity Analysis, Description | [11] | Increase |  |  |  |
Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member] | Reset Elections [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value Unobservable Input Range | [15] | 20.00% |  |  |  |
Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member] | Reset Elections [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value Unobservable Input Range | [15] | 75.00% |  |  |  |
Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member] | Equity Volatility [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value Measurements, Sensitivity Analysis, Description | [11] | Increase |  |  |  |
Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member] | Equity Volatility [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value Unobservable Input Range | [16] | 10.00% |  |  |  |
Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member] | Equity Volatility [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value Unobservable Input Range | [16] | 40.00% |  |  |  |
Interest Rate Contract [Member] | Interest Rate Swap [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | $ (30) |  | $ (29) |  |
Fair Value Measurements, Valuation Techniques |  | Discounted cash flows |  | Discounted cash flows |  |
Fair Value Measurements, Significant Assumptions |  | Swap curve beyond 30 years |  | Swap curve beyond 30 years |  |
Fair Value Measurements, Sensitivity Analysis, Description | [17] | Decrease |  | Decrease |  |
Interest Rate Contract [Member] | Interest Rate Swap [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value Measurements, Unobservable Swap Curve |  | 3.00% |  | 3.00% |  |
Interest Rate Contract [Member] | Interest Rate Swap [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value Measurements, Unobservable Swap Curve |  | 3.00% |  | 3.00% |  |
US GMWB Hedging Instruments [Member] | Equity Option [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | $ 35 |  | $ 46 |  |
Fair Value Measurements, Valuation Techniques |  | Option model |  | Option model |  |
Fair Value Measurements, Significant Assumptions |  | Equity volatility |  | Equity volatility |  |
Fair Value Measurements, Sensitivity Analysis, Description | [17] | Increase |  | Increase |  |
US GMWB Hedging Instruments [Member] | Equity Option [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value Assumptions, Expected Volatility Rate |  | 27.00% |  | 22.00% |  |
US GMWB Hedging Instruments [Member] | Equity Option [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value Assumptions, Expected Volatility Rate |  | 29.00% |  | 34.00% |  |
US GMWB Hedging Instruments [Member] | Other Contract [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | $ 131 |  | $ 124 |  |
Fair Value Measurements, Valuation Techniques |  | Discounted cash flows |  | Discounted cash flows |  |
Fair Value Measurements, Significant Assumptions |  | Equity volatility |  | Equity volatility |  |
Fair Value Measurements, Sensitivity Analysis, Description | [17] | Increase |  | Increase |  |
US GMWB Hedging Instruments [Member] | Other Contract [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value Assumptions, Expected Volatility Rate |  | 10.00% |  | 10.00% |  |
US GMWB Hedging Instruments [Member] | Other Contract [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value Assumptions, Expected Volatility Rate |  | 40.00% |  | 40.00% |  |
US Macro Hedge Program [Member] | Equity Option [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | $ 179 |  | $ 141 |  |
Fair Value Measurements, Valuation Techniques |  | Option model |  | Option model |  |
Fair Value Measurements, Significant Assumptions |  | Equity volatility |  | Equity volatility |  |
Fair Value Measurements, Sensitivity Analysis, Description | [17] | Increase |  | Increase |  |
US Macro Hedge Program [Member] | Equity Option [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value Assumptions, Expected Volatility Rate |  | 14.00% |  | 27.00% |  |
US Macro Hedge Program [Member] | Equity Option [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value Assumptions, Expected Volatility Rate |  | 28.00% |  | 28.00% |  |
Long [Member] | Interest Rate Contract [Member] | Interest Rate Swaption [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | $ 8 | [18] | $ 22 |  |
Fair Value Measurements, Valuation Techniques |  | Option model |  | Option model |  |
Fair Value Measurements, Significant Assumptions |  | Interest rate volatility |  | Interest rate volatility |  |
Fair Value Measurements, Sensitivity Analysis, Description | [17] | Increase |  | Increase |  |
Long [Member] | Interest Rate Contract [Member] | Interest Rate Swaption [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value Assumptions, Expected Volatility Rate |  | 1.00% |  | 1.00% |  |
Long [Member] | Interest Rate Contract [Member] | Interest Rate Swaption [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value Assumptions, Expected Volatility Rate |  | 2.00% |  | 1.00% |  |
Portion at Fair Value Measurement [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Alternative Investments, Fair Value Disclosure | [19] | $ 622 |  | $ 770 |  |
Portion at Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Alternative Investments, Fair Value Disclosure | [19] | $ 74 |  | $ 189 |  |
[1] | Transfers in and/or (out) of Level 3 are primarily attributable to the availability of market observable information, the re-evaluation of the observability of pricing inputs and liquidity restrictions.
[2] | All amounts in these rows are reported in net realized capital gains (losses). The realized/unrealized gains (losses) included in net income for separate account assets are offset by an equal amount for separate account liabilities, which results in a net zero impact on net income for the Company. All amounts are before income taxes and amortization of DAC.
[3] | Includes both market and non-market impacts in deriving realized and unrealized gains (losses).
[4] | The Company classifies gains and losses on GMWB reinsurance derivatives and GMWB embedded derivatives as unrealized gains (losses) for purposes of disclosure in this table because it is impracticable to track on a contract-by-contract basis the realized gains (losses) for these reinsurance derivatives and embedded derivatives.
[5] | All amounts are before income taxes and amortization of DAC.
[6] | [7]Amounts presented are for Level 3 only and therefore may not agree to other disclosures included herein.
[7] | [1]The weighted average is determined based on the fair value of the securities.
[8] | [2]Conversely, the impact of a decrease in input would have the opposite impact to the fair value as that presented in the table.
[9] | [3]Level 3 CMBS, corporate and municipal securities excludes those for which the Company bases fair value on broker quotations as noted in the following discussion.
[10] | [4]Decrease for above market rate coupons and increase for below market rate coupons.
[11] | Conversely, the impact of a decrease in input would have the opposite impact to the fair value as that presented in the table.
[12] | [2]Range represents assumed cumulative percentages of policyholders taking withdrawals.
[13] | [4]Range represents assumed annual percentages of full surrender of the underlying variable annuity contracts across all policy durations for in force business.
[14] | [4]Range represents assumed annual percentages of full surrender of the underlying variable annuity contracts across all policy durations for in force business.
[15] | [5]Range represents assumed cumulative percentages of policyholders that would elect to reset their guaranteed benefit base.
[16] | [6]Range represents implied market volatilities for equity indices based on multiple pricing sources.
[17] | Conversely, the impact of a decrease in input would have the opposite impact to the fair value as that presented in the table. Changes are based on long positions, unless otherwise noted. Changes in fair value will be inversely impacted for short positions.
[18] | The swaptions presented are purchased options that have the right to enter into a pay-fixed swap.
[19] | Represents hedge funds where investment company accounting has been applied to a wholly-owned fund of funds measured at fair value.

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