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Fair Value Measurements Level 4 Significant Unobservable Inputs (Details) - USD ($) | 3 Months Ended | 9 Months Ended | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016 | Dec. 31, 2016 | Jul. 01, 2017 | Jun. 30, 2017 | Jul. 01, 2016 | Jun. 30, 2016 | Dec. 31, 2015
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value, Assets, Level 2 to Level 1 Transfers, Amount | $ 0 | $ 0 | $ 0 | $ 0 |  | $ 0 |  | $ 0 |  |
Fair Value Inputs, Comparability Adjustments | 0.00% |  | 0.00% |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value | $ 4,021,000,000 | 4,727,000,000 | $ 4,021,000,000 | 4,727,000,000 | $ 4,422,000,000 |  | $ 4,318,000,000 |  | $ 4,428,000,000 | $ 3,911,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings | (14,000,000) | (94,000,000) | (95,000,000) | (102,000,000) |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) | 34,000,000 | 42,000,000 | 101,000,000 | 72,000,000 |  |  |  |  |  |
Limited partnerships and other alternative investments | 2,533,000,000 |  | 2,533,000,000 |  | 2,456,000,000 |  |  |  |  |
Available-for-sale Securities, Debt Securities | 57,669,000,000 |  | 57,669,000,000 |  | 56,003,000,000 |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases | 189,000,000 | 636,000,000 | 1,202,000,000 | 1,303,000,000 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements | 126,000,000 | 93,000,000 | 598,000,000 | 399,000,000 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales | (48,000,000) | (82,000,000) | (343,000,000) | (211,000,000) |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 | 26,000,000 | 125,000,000 | 154,000,000 | 684,000,000 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 | (358,000,000) | (235,000,000) | (822,000,000) | (531,000,000) |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) | (13,000,000) | (96,000,000) | (103,000,000) | (60,000,000) |  |  |  |  |  |
Business Combination, Contingent Consideration, Liability | 60 |  | $ 60 |  |  |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, Change in Range of Outcomes, Contingent Consideration, Liability, Significant Inputs |  |  | The future expected payout is discounted back to the valuation date using a risk-adjusted discount rate of 18.8%. The risk-adjusted discount rate is an internally generated and significant unobservable input to fair value. |  |  |  |  |  |  |
Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value | 226,000,000 | 325,000,000 | $ 226,000,000 | 325,000,000 | 201,000,000 |  | 192,000,000 |  | 171,000,000 | 139,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings | 0 | 1,000,000 | 3,000,000 | 1,000,000 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) | 3,000,000 | (1,000,000) | 5,000,000 | 5,000,000 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value | 121,000,000 | 356,000,000 | 121,000,000 | 356,000,000 | 299,000,000 |  | 198,000,000 |  | 440,000,000 | 288,000,000
Available-for-sale Securities, Debt Securities | 3,445,000,000 |  | 3,445,000,000 |  | 3,810,000,000 |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings | 57,000,000 | 101,000,000 | 190,000,000 | (18,000,000) |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Other Comprehensive Income (Loss) | 0 | 0 | 0 | 0 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements | 20,000,000 | (17,000,000) | (12,000,000) | (50,000,000) |  |  |  |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss) | 57,000,000 | 78,000,000 | 190,000,000 | (41,000,000) |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases | 37,000,000 | 165,000,000 | 148,000,000 | 226,000,000 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements | 1,000,000 | 3,000,000 | 7,000,000 | 12,000,000 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales | (2,000,000) | (11,000,000) | (45,000,000) | (27,000,000) |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 | 0 | 10,000,000 | 10,000,000 | 16,000,000 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 | 3,000,000 | 7,000,000 | 89,000,000 | (23,000,000) |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) | 0 | 0 | 1,000,000 |  |  |  |  |  |  |
Derivative [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs | 182,000,000 | 269,000,000 | 182,000,000 | 269,000,000 | 228,000,000 |  | 176,000,000 |  | 279,000,000 | 267,000,000
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings | (3,000,000) | (69,000,000) | (60,000,000) | (77,000,000) |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss) | 0 | 0 | 0 | 0 |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases | 9,000,000 | 63,000,000 | 14,000,000 | 79,000,000 |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements | 0 | (4,000,000) | 0 | (6,000,000) |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Sales | 0 | 0 | 0 | 0 |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3 | 0 | 0 | 0 | 0 |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers out of Level 3 | 0 | 0 | 0 | 6,000,000 |  |  |  |  |  |
Fixed Maturities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value | 0 | 9,000,000 | 0 | 9,000,000 | $ 11,000,000 |  |  |  | 6,000,000 | 16,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings |  | 0 | 0 | (1,000,000) |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) |  | 0 | 0 | 0 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases |  | 5,000,000 | 4,000,000 | 11,000,000 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements |  | 1,000,000 | 2,000,000 | 3,000,000 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales |  | (1,000,000) | (13,000,000) | (4,000,000) |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 |  | 0 | 0 | 0 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 |  | 0 |  | (10,000,000) |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) | 0 | 0 | $ 0 | 0 |  |  |  |  |  |
CMBS [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Measurements, Valuation Techniques |  |  | Discounted cash flows |  | Discounted cash flows |  |  |  |  |
Positive or negative relationship of change in input to change in fair value measurement |  |  | Decrease |  | Decrease |  |  |  |  |
CMBS [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Counterparty Credit Risk |  |  | 1816.00% |  | 1273.00% |  |  |  |  |
CMBS [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Counterparty Credit Risk |  |  | 9.00% |  | 10.00% |  |  |  |  |
CMBS [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Counterparty Credit Risk |  |  | 352.00% |  | 366.00% |  |  |  |  |
Corporate [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Measurements, Valuation Techniques |  |  | Discounted cash flows |  | Discounted cash flows |  |  |  |  |
Positive or negative relationship of change in input to change in fair value measurement |  |  | Decrease |  | Decrease |  |  |  |  |
Corporate [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Counterparty Credit Risk |  |  | 940.00% |  | 1302.00% |  |  |  |  |
Corporate [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Counterparty Credit Risk |  |  | 102.00% |  | 122.00% |  |  |  |  |
Corporate [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Counterparty Credit Risk |  |  | 270.00% |  | 359.00% |  |  |  |  |
Municipal [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Measurements, Valuation Techniques |  |  | Discounted cash flows |  | Discounted cash flows |  |  |  |  |
Positive or negative relationship of change in input to change in fair value measurement |  |  | Decrease |  | Decrease |  |  |  |  |
Municipal [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Treasury Yield |  |  | 239.00% |  | 286.00% |  |  |  |  |
Municipal [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Treasury Yield |  |  | 184.00% |  | 135.00% |  |  |  |  |
Municipal [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Treasury Yield |  |  | 201.00% |  | 221.00% |  |  |  |  |
RMBS [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Measurements, Valuation Techniques |  |  | Discounted cash flows |  | Discounted cash flows |  |  |  |  |
RMBS [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Counterparty Credit Risk |  |  | 501.00% |  | 1830.00% |  |  |  |  |
Fair Value Inputs, Prepayment Rate |  |  | 13.00% |  | 20.00% |  |  |  |  |
Fair Value Inputs, Probability of Default |  |  | 9.00% |  | 11.00% |  |  |  |  |
Fair Value Inputs, Loss Severity |  |  | 100.00% |  | 100.00% |  |  |  |  |
RMBS [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Counterparty Credit Risk |  |  | 26.00% |  | 16.00% |  |  |  |  |
Fair Value Inputs, Prepayment Rate |  |  | 0.00% |  | 0.00% |  |  |  |  |
Fair Value Inputs, Probability of Default |  |  | 2.00% |  | 0.00% |  |  |  |  |
Fair Value Inputs, Loss Severity |  |  | 0.00% |  | 0.00% |  |  |  |  |
RMBS [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Counterparty Credit Risk |  |  | 76.00% |  | 192.00% |  |  |  |  |
Fair Value Inputs, Prepayment Rate |  |  | 5.00% |  | 4.00% |  |  |  |  |
Fair Value Inputs, Probability of Default |  |  | 4.00% |  | 5.00% |  |  |  |  |
Fair Value Inputs, Loss Severity |  |  | 68.00% |  | 75.00% |  |  |  |  |
Reinsurance Recoverable [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value | 51,000,000 |  | $ 51,000,000 |  | $ 73,000,000 |  | 57,000,000 |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings | (9,000,000) |  | (33,000,000) |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) | 0 |  | 0 |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases | 0 |  | 0 |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements | 3,000,000 |  | 11,000,000 |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales | 0 |  | 0 |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 | 0 |  | 0 |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 | 0 |  | $ 0 |  |  |  |  |  |  |
Spread [Member] | CMBS [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Measurements, Significant Assumptions |  |  | Spread (encompasses prepayment, default risk and loss severity) |  | Spread (encompasses prepayment, default risk and loss severity) |  |  |  |  |
Spread [Member] | Corporate [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Measurements, Significant Assumptions |  |  | Spread |  | Spread |  |  |  |  |
Spread [Member] | Municipal [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Measurements, Significant Assumptions |  |  | Spread |  | Spread |  |  |  |  |
Spread [Member] | RMBS [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Measurements, Significant Assumptions |  |  | Spread |  | Spread |  |  |  |  |
Positive or negative relationship of change in input to change in fair value measurement |  |  | Decrease |  | Decrease |  |  |  |  |
Prepayment Rate [Member] | RMBS [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Measurements, Significant Assumptions |  |  | Constant prepayment rate |  | Constant prepayment rate |  |  |  |  |
Positive or negative relationship of change in input to change in fair value measurement |  |  | Decrease [5] |  | Decrease [5] |  |  |  |  |
Probability of Default [Member] | RMBS [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Measurements, Significant Assumptions |  |  | Constant default rate |  | Constant default rate |  |  |  |  |
Positive or negative relationship of change in input to change in fair value measurement |  |  | Decrease |  | Decrease |  |  |  |  |
Loss Severity [Member] | RMBS [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Measurements, Significant Assumptions |  |  | Loss severity |  | Loss severity |  |  |  |  |
Positive or negative relationship of change in input to change in fair value measurement |  |  | Decrease |  | Decrease |  |  |  |  |
Asset-backed Securities [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities | 2,305,000,000 |  | $ 2,305,000,000 |  | $ 2,382,000,000 |  |  |  |  |
Asset-backed Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities | 56,000,000 |  | 56,000,000 |  | 82,000,000 |  |  |  |  |
Foreign Government Debt Securities [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities | 1,365,000,000 |  | 1,365,000,000 |  | 1,171,000,000 |  |  |  |  |
Foreign Government Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities | 33,000,000 |  | 33,000,000 |  | 64,000,000 |  |  |  |  |
RMBS [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities | 4,205,000,000 |  | 4,205,000,000 |  | 4,767,000,000 |  |  |  |  |
RMBS [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities | 1,950,000,000 |  | 1,950,000,000 |  | 1,972,000,000 |  |  |  |  |
Municipal [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities | 12,435,000,000 |  | 12,435,000,000 |  | 11,486,000,000 |  |  |  |  |
Municipal [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities | 86,000,000 |  | 86,000,000 |  | 118,000,000 |  |  |  |  |
Corporate [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities | 25,746,000,000 |  | 25,746,000,000 |  | 25,666,000,000 |  |  |  |  |
Corporate [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities | 1,039,000,000 |  | 1,039,000,000 |  | 1,080,000,000 |  |  |  |  |
CMBS [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities | 5,120,000,000 |  | 5,120,000,000 |  | 4,936,000,000 |  |  |  |  |
CMBS [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities | 93,000,000 |  | 93,000,000 |  | 80,000,000 |  |  |  |  |
Collateralized Debt Obligations [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities | 2,395,000,000 |  | 2,395,000,000 |  | 1,916,000,000 |  |  |  |  |
Collateralized Debt Obligations [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities | 188,000,000 |  | 188,000,000 |  | 414,000,000 |  |  |  |  |
Fair Value, Measurements, Recurring [Member] | RMBS [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities | 1,950,000,000 |  | 1,950,000,000 |  | 1,963,000,000 |  |  |  |  |
Fair Value, Measurements, Recurring [Member] | Municipal [Member] | Non-Broker Priced [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities | 70,000,000 |  | 70,000,000 |  | 101,000,000 |  |  |  |  |
Fair Value, Measurements, Recurring [Member] | Corporate [Member] | Non-Broker Priced [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities | 496,000,000 |  | 496,000,000 |  | 510,000,000 |  |  |  |  |
Fair Value, Measurements, Recurring [Member] | CMBS [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities | 49,000,000 |  | $ 49,000,000 |  | $ 52,000,000 |  |  |  |  |
Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member] | Withdrawal Utilization [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Positive or negative relationship of change in input to change in fair value measurement |  |  | Increase |  | Increase |  |  |  |  |
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, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Unobservable Input Range |  |  | 100.00% |  | 100.00% |  |  |  |  |
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, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Unobservable Input Range |  |  | 15.00% |  | 15.00% |  |  |  |  |
Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member] | Withdrawal Rates [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Positive or negative relationship of change in input to change in fair value measurement |  |  | Increase |  | Increase |  |  |  |  |
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, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Unobservable Input Range |  |  | 8.00% |  | 8.00% |  |  |  |  |
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, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Unobservable Input Range |  |  | 0.00% |  | 0.00% |  |  |  |  |
Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member] | Lapse Rates [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Positive or negative relationship of change in input to change in fair value measurement |  |  | Decrease |  | Decrease |  |  |  |  |
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, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Unobservable Input Range |  |  | 40.00% |  | 40.00% |  |  |  |  |
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, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Unobservable Input Range |  |  | 0.00% |  | 0.00% |  |  |  |  |
Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member] | Reset Elections [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Positive or negative relationship of change in input to change in fair value measurement |  |  | Increase |  | Increase |  |  |  |  |
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, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Unobservable Input Range |  |  | 75.00% |  | 75.00% |  |  |  |  |
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, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Unobservable Input Range |  |  | 20.00% |  | 20.00% |  |  |  |  |
Equity Contract [Member] | Derivative [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs | 2,000,000 | 0 | $ 2,000,000 | 0 | $ 0 |  | 2,000,000 |  | 1,000,000 | 0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings | 0 | (1,000,000) | (3,000,000) | (16,000,000) |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss) | 0 | 0 | 0 | 0 |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases | 0 | 0 | 5,000,000 | 16,000,000 |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements | 0 | 0 | 0 | 0 |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Sales | 0 | 0 | 0 | 0 |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3 | 0 | 0 | 0 | 0 |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers out of Level 3 | 0 | 0 | $ 0 | 0 |  |  |  |  |  |
Other Contract [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Measurements, Valuation Techniques |  |  | Discounted cash flows |  | Discounted cash flows |  |  |  |  |
Fair Value Measurements, Significant Assumptions |  |  | Equity volatility |  | Equity volatility |  |  |  |  |
Positive or negative relationship of change in input to change in fair value measurement |  |  | Increase |  | Increase |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net | 62,000,000 |  | $ 62,000,000 |  | $ 100,000,000 |  |  |  |  |
Other Contract [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Assumptions, Expected Volatility Rate |  |  | 30.00% |  | 30.00% |  |  |  |  |
Other Contract [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Assumptions, Expected Volatility Rate |  |  | 7.00% |  | 12.00% |  |  |  |  |
Other Contract [Member] | Derivative [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs | 0 | 2,000,000 | $ 0 | 2,000,000 | $ 1,000,000 |  |  |  | 4,000,000 | 7,000,000
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings |  | (2,000,000) | (1,000,000) | (5,000,000) |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss) |  | 0 | 0 | 0 |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases |  | 0 | 0 | 0 |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements |  | 0 | 0 | 0 |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Sales |  | 0 | 0 | 0 |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3 |  | 0 | 0 | 0 |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers out of Level 3 |  | 0 | $ 0 | 0 |  |  |  |  |  |
Other Contract [Member] | Equity Volatility [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Positive or negative relationship of change in input to change in fair value measurement |  |  | Increase |  | Increase |  |  |  |  |
Other Contract [Member] | Equity Volatility [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Unobservable Input Range |  |  | 30.00% |  | 30.00% |  |  |  |  |
Other Contract [Member] | Equity Volatility [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Unobservable Input Range |  |  | 7.00% |  | 12.00% |  |  |  |  |
Equity Option [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Measurements, Valuation Techniques |  |  | Option model |  | Option model |  |  |  |  |
Fair Value Measurements, Significant Assumptions |  |  | Equity volatility |  | Equity volatility |  |  |  |  |
Positive or negative relationship of change in input to change in fair value measurement |  |  | Increase |  | Increase |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net | 190,000,000 |  | $ 190,000,000 |  | $ 188,000,000 |  |  |  |  |
Equity Option [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Assumptions, Expected Volatility Rate |  |  | 30.00% |  | 28.00% |  |  |  |  |
Equity Option [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Assumptions, Expected Volatility Rate |  |  | 15.00% |  | 17.00% |  |  |  |  |
Interest Rate Swap [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
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 |  |  |  |  |
Positive or negative relationship of change in input to change in fair value measurement |  |  | Decrease |  | Decrease |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net | (29,000,000) |  | $ (29,000,000) |  | $ (29,000,000) |  |  |  |  |
Interest Rate Swap [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Measurements, Unobservable Swap Curve |  |  | 3.00% |  | 3.00% |  |  |  |  |
Interest Rate Swap [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Measurements, Unobservable Swap Curve |  |  | 2.00% |  | 3.00% |  |  |  |  |
Interest Rate Swaption [Member] | Long [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Measurements, Valuation Techniques |  |  | Option model |  | Option model |  |  |  |  |
Fair Value Measurements, Significant Assumptions |  |  | Interest rate volatility |  | Interest rate volatility |  |  |  |  |
Positive or negative relationship of change in input to change in fair value measurement |  |  | Increase |  | Increase |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net | 2,000,000 |  | $ 2,000,000 |  | $ 8,000,000 |  |  |  |  |
Interest Rate Swaption [Member] | Long [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Assumptions, Expected Volatility Rate |  |  | 3.00% |  | 2.00% |  |  |  |  |
Interest Rate Swaption [Member] | Long [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Assumptions, Expected Volatility Rate |  |  | 2.00% |  | 2.00% |  |  |  |  |
Variance Swap [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Measurements, Valuation Techniques |  |  | Option model |  | Option model |  |  |  |  |
Fair Value Measurements, Significant Assumptions |  |  | Equity volatility |  | Equity volatility |  |  |  |  |
Positive or negative relationship of change in input to change in fair value measurement |  |  | Increase |  | Increase |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net | (40,000,000) |  | $ (40,000,000) |  | $ (36,000,000) |  |  |  |  |
Variance Swap [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Assumptions, Expected Volatility Rate |  |  | 19.00% |  | 23.00% |  |  |  |  |
Variance Swap [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Assumptions, Expected Volatility Rate |  |  | 12.00% |  | 20.00% |  |  |  |  |
Reinsurance Recoverable [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value |  | 98,000,000 |  | 98,000,000 |  |  |  |  | 106,000,000 | 83,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings |  | (12,000,000) |  | 4,000,000 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) |  | 0 |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases |  | 0 |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements |  | 4,000,000 |  | 11,000,000 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales |  | 0 |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 |  | 0 |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 |  | 0 |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) | (9,000,000) | (12,000,000) | $ (33,000,000) | 4,000,000 |  |  |  |  |  |
U.S. Macro Hedge Program [Member] | Derivative [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs | 183,000,000 | 168,000,000 | 183,000,000 | 168,000,000 | $ 167,000,000 |  | 160,000,000 |  | 141,000,000 | 147,000,000
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings | 14,000,000 | (32,000,000) | 7,000,000 | (36,000,000) |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss) | 0 | 0 | 0 | 0 |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases | 9,000,000 | 63,000,000 | 9,000,000 | 63,000,000 |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements | 0 | (4,000,000) | 0 | (6,000,000) |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Sales | 0 | 0 | 0 | 0 |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3 | 0 | 0 | 0 | 0 |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers out of Level 3 | 0 | 0 | 0 | 0 |  |  |  |  |  |
U.S. GMWB Hedging Instruments [Member] | Derivative [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs | 24,000,000 | 131,000,000 | 24,000,000 | 131,000,000 | 81,000,000 |  | 40,000,000 |  | 165,000,000 | 135,000,000
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings | (16,000,000) | (34,000,000) | (57,000,000) | (10,000,000) |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss) | 0 | 0 | 0 | 0 |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases | 0 | 0 | 0 | 0 |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements | 0 | 0 | 0 | 0 |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Sales | 0 | 0 | 0 | 0 |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3 | 0 | 0 | 0 | 0 |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers out of Level 3 | 0 | 0 | 0 | 6,000,000 |  |  |  |  |  |
Interest Rate Contract [Member] | Derivative [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs | (27,000,000) | (32,000,000) | (27,000,000) | (32,000,000) | (21,000,000) |  | (26,000,000) |  | (32,000,000) | (22,000,000)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings | (1,000,000) | 0 | (6,000,000) | (10,000,000) |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss) | 0 | 0 | 0 | 0 |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases | 0 | 0 | 0 | 0 |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements | 0 | 0 | 0 | 0 |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Sales | 0 | 0 | 0 | 0 |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3 | 0 | 0 | 0 | 0 |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers out of Level 3 | 0 | 0 | 0 | 0 |  |  |  |  |  |
Available-for-sale Securities [Member] | Fixed Maturities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value | 3,445,000,000 | 3,926,000,000 | 3,445,000,000 | 3,926,000,000 | 3,810,000,000 |  | 3,795,000,000 |  | 3,769,000,000 | 3,313,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings | (2,000,000) | (13,000,000) | (5,000,000) | (28,000,000) |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) | 35,000,000 | 43,000,000 | 105,000,000 | 60,000,000 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases | 120,000,000 | 399,000,000 | 1,009,000,000 | 981,000,000 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements | 128,000,000 | 89,000,000 | 600,000,000 | 389,000,000 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales | (46,000,000) | (70,000,000) | (285,000,000) | (175,000,000) |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 | 26,000,000 | 115,000,000 | 144,000,000 | 668,000,000 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 | 355,000,000 | 228,000,000 | 733,000,000 | (504,000,000) |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) | (1,000,000) | (13,000,000) | (14,000,000) | (15,000,000) |  |  |  |  |  |
Available-for-sale Securities [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value | 117,000,000 | 100,000,000 | 117,000,000 | 100,000,000 | 99,000,000 |  | 98,000,000 |  | 97,000,000 | 93,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings | 0 | (1,000,000) | 0 | (1,000,000) |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) | (4,000,000) | 0 | (9,000,000) | 7,000,000 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases | 23,000,000 | 4,000,000 | 27,000,000 | 6,000,000 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements | 0 | 0 | 0 | 0 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales | 0 |  | 0 | (5,000,000) |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 | 0 |  | 0 | 0 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 | 0 | 0 | 0 | 0 |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) | 0 | (1,000,000) | 0 | (1,000,000) |  |  |  |  |  |
Available-for-sale Securities [Member] | Asset-backed Securities [Member] | Fixed Maturities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value | 56,000,000 | 31,000,000 | 56,000,000 | 31,000,000 | 82,000,000 |  | 96,000,000 |  | 41,000,000 | 37,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings | 0 |  | 0 |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) | 0 | 0 | 0 | 0 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases | 0 | 18,000,000 | 70,000,000 | 18,000,000 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements | 6,000,000 | 0 | 12,000,000 | 7,000,000 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales | (6,000,000) | (2,000,000) | (6,000,000) | (2,000,000) |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 | 7,000,000 | 0 | 33,000,000 | 18,000,000 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 | 35,000,000 | 26,000,000 | 111,000,000 | 33,000,000 |  |  |  |  |  |
Available-for-sale Securities [Member] | Foreign Government Debt Securities [Member] | Fixed Maturities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value | 33,000,000 | 74,000,000 | 33,000,000 | 74,000,000 | 64,000,000 |  | 29,000,000 |  | 72,000,000 | 60,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings | 0 | 0 | 0 | 1,000,000 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) | 1,000,000 | 2,000,000 | 4,000,000 | 11,000,000 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases | 9,000,000 | 9,000,000 | 15,000,000 | 24,000,000 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements | 0 | 1,000,000 | 2,000,000 | 3,000,000 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales | 0 | (8,000,000) | (2,000,000) | (19,000,000) |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 | 0 | 0 | 0 | 0 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 | 6,000,000 | 0 | 46,000,000 | 0 |  |  |  |  |  |
Available-for-sale Securities [Member] | RMBS [Member] | Fixed Maturities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value | 1,950,000,000 | 2,055,000,000 | 1,950,000,000 | 2,055,000,000 | 1,972,000,000 |  | 2,011,000,000 |  | 1,873,000,000 | 1,622,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings | 0 | 0 | 0 | 0 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) | 27,000,000 | 15,000,000 | 60,000,000 | 11,000,000 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases | 40,000,000 | 253,000,000 | 263,000,000 | 683,000,000 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements | 119,000,000 | 78,000,000 | 329,000,000 | 236,000,000 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales | 0 | (8,000,000) | (7,000,000) | (8,000,000) |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 | 0 | 0 | 0 | 5,000,000 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 | 9,000,000 | 0 | 9,000,000 | (22,000,000) |  |  |  |  |  |
Available-for-sale Securities [Member] | Municipal [Member] | Fixed Maturities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value | 86,000,000 | 126,000,000 | 86,000,000 | 126,000,000 | 118,000,000 |  | 86,000,000 |  | 90,000,000 | 49,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings | 0 | 0 | 4,000,000 | 0 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) | 0 | 2,000,000 | 4,000,000 | 7,000,000 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases | 0 | 34,000,000 | 0 | 54,000,000 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements | 0 | 0 | 0 | 0 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales | 0 |  | (40,000,000) | 0 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 | 0 | 0 | 0 | 16,000,000 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 | 0 | 0 | 0 | 0 |  |  |  |  |  |
Available-for-sale Securities [Member] | Corporate [Member] | Fixed Maturities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value | 1,039,000,000 | 1,094,000,000 | 1,039,000,000 | 1,094,000,000 | 1,080,000,000 |  | 1,136,000,000 |  | 1,136,000,000 | 854,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings | (1,000,000) | (12,000,000) | (7,000,000) | (26,000,000) |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) | 8,000,000 | 27,000,000 | 38,000,000 | 39,000,000 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases | 42,000,000 | 69,000,000 | 257,000,000 | 136,000,000 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements | 1,000,000 | 3,000,000 | 39,000,000 | 52,000,000 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales | (40,000,000) | (52,000,000) | (230,000,000) | (143,000,000) |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 | 19,000,000 | 115,000,000 | 111,000,000 | 628,000,000 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 | 126,000,000 | (192,000,000) | 171,000,000 | 342,000,000 |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) | (1,000,000) | (13,000,000) | (13,000,000) | (14,000,000) |  |  |  |  |  |
Available-for-sale Securities [Member] | CMBS [Member] | Fixed Maturities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value | 93,000,000 | 77,000,000 | 93,000,000 | 77,000,000 | 80,000,000 |  | 98,000,000 |  | 79,000,000 | 150,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings | (1,000,000) | (1,000,000) | (2,000,000) | (2,000,000) |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) | 0 | 0 | 1,000,000 | (3,000,000) |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases | 0 | 15,000,000 | 75,000,000 | 65,000,000 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements | 4,000,000 | 6,000,000 | 10,000,000 | 24,000,000 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales | 0 | 0 | 0 | (3,000,000) |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 | 0 | 0 | 0 | 1,000,000 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 | 0 | 10,000,000 | 51,000,000 | (107,000,000) |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) | 0 | 0 | (1,000,000) | (1,000,000) |  |  |  |  |  |
Available-for-sale Securities [Member] | Collateralized Debt Obligations [Member] | Fixed Maturities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value | 188,000,000 | 469,000,000 | 188,000,000 | 469,000,000 | $ 414,000,000 |  | 339,000,000 |  | 478,000,000 | 541,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings | 0 |  | 0 | (1,000,000) |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) | (1,000,000) | (3,000,000) | (2,000,000) | (5,000,000) |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases | 29,000,000 | 1,000,000 | 329,000,000 | 1,000,000 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements | 0 | 7,000,000 | 208,000,000 | 67,000,000 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales | 0 | 0 | 0 | 0 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 | 0 | 0 |  | 0 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 | 179,000,000 | 0 | $ 345,000,000 | 0 |  |  |  |  |  |
Hedge Funds, Equity [Member] | Equity Option [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Measurements, Valuation Techniques |  |  | Option model |  | Option model |  |  |  |  |
Fair Value Measurements, Significant Assumptions |  |  | Equity volatility |  | Equity volatility |  |  |  |  |
Positive or negative relationship of change in input to change in fair value measurement |  |  | Increase |  | Increase |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net | 2,000,000 |  | $ 2,000,000 |  | $ 17,000,000 |  |  |  |  |
Hedge Funds, Equity [Member] | Equity Option [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Assumptions, Expected Volatility Rate |  |  | 27.00% |  | 30.00% |  |  |  |  |
Hedge Funds, Equity [Member] | Equity Option [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value Assumptions, Expected Volatility Rate |  |  | 27.00% |  | 27.00% |  |  |  |  |
Other Policyholder Funds and Benefits Payable [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings | 58,000,000 | 78,000,000 | $ 193,000,000 | (41,000,000) |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Other Comprehensive Income (Loss) | 0 | 0 | 0 | 0 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements | 20,000,000 | (17,000,000) | (12,000,000) | (50,000,000) |  |  |  |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss) | 58,000,000 | 78,000,000 | 193,000,000 | (41,000,000) |  |  |  |  |  |
Other Policyholder Funds and Benefits Payable [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value | 93,000,000 | 379,000,000 | 93,000,000 | 379,000,000 | $ 274,000,000 |  | 171,000,000 |  | 440,000,000 | 288,000,000
Other Liabilities [Member] | Equity Contract [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net | 2,000,000 |  | 2,000,000 |  | 33,000,000 |  |  |  |  |
Other Liabilities [Member] | Equity Contract [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net | 2,000,000 |  | 2,000,000 |  | 0 |  |  |  |  |
Other Liabilities [Member] | Macro Hedge Program [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net | 8,000,000 |  | 8,000,000 |  | 50,000,000 |  |  |  |  |
Other Liabilities [Member] | Macro Hedge Program [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net | 25,000,000 |  | 25,000,000 |  | 47,000,000 |  |  |  |  |
Other Liabilities [Member] | U.S. GMWB Hedging Instruments [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net | 26,000,000 |  | 26,000,000 |  | 20,000,000 |  |  |  |  |
Other Liabilities [Member] | U.S. GMWB Hedging Instruments [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net | (16,000,000) |  | (16,000,000) |  | 21,000,000 |  |  |  |  |
Other Liabilities [Member] | Interest Rate Contract [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net | (479,000,000) |  | (479,000,000) |  | (542,000,000) |  |  |  |  |
Other Liabilities [Member] | Interest Rate Contract [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net | $ (27,000,000) |  | $ (27,000,000) |  | $ (21,000,000) |  |  |  |  |
Separate Accounts [Member] | Hedge Funds [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Redemption Restriction, Percentage | 45.00% |  | 45.00% |  | 39.00% |  |  |  |  |
Separate Accounts [Member] | Private Equity Funds [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Redemption Restriction, Percentage | 16.00% |  | 16.00% |  | 11.00% |  |  |  |  |
Equity Linked Notes [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value | $ 0 | 31,000,000 | $ 0 | 31,000,000 | $ 33,000,000 |  | 37,000,000 |  | 28,000,000 | 26,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings | 0 | (3,000,000) | (4,000,000) | (5,000,000) |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Other Comprehensive Income (Loss) | 0 |  | 0 |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements | 37,000,000 |  | 37,000,000 | 0 |  |  |  |  |  |
Equity Linked Notes [Member] | Other Policyholder Funds and Benefits Payable [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements |  | 0 |  |  |  |  |  |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss) | 0 | (3,000,000) | (4,000,000) | (5,000,000) |  |  |  |  |  |
Obligations [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value | 28,000,000 | (23,000,000) | 28,000,000 | (23,000,000) | 25,000,000 |  | 27,000,000 |  | 0 | 0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings | 23,000,000 |  |  | 23,000,000 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements | 0 |  | 0 |  |  |  |  |  |  |
Obligations [Member] | Other Liabilities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings | (1,000,000) |  |  |  |  |  |  |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss) |  | 0 | (3,000,000) | 0 |  |  |  |  |  |
Guaranteed Minimum Withdrawal Benefit [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value | (93,000,000) | 348,000,000 | (93,000,000) | 348,000,000 | $ 241,000,000 |  | $ 134,000,000 |  | $ 412,000,000 | $ 262,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings | 58,000,000 | 81,000,000 | 197,000,000 | (36,000,000) |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Other Comprehensive Income (Loss) | 0 | 0 | 0 | 0 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements | (17,000,000) | (17,000,000) | (49,000,000) | (50,000,000) |  |  |  |  |  |
Guaranteed Minimum Withdrawal Benefit [Member] | Other Policyholder Funds and Benefits Payable [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss) | $ 58,000,000 | $ 81,000,000 | $ 197,000,000 | $ (36,000,000) |  |  |  |  |  |

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- Definition Fair value of investments in certain entities that calculate net asset value per share, including, but not limited to, by unit, membership interest, or other ownership interest. Investments include, but are not limited to, investments in certain hedge funds, venture capital funds, private equity funds, real estate partnerships or funds. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 6A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=SL6742756-110258 + Details
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- Definition Amount of debt securities categorized neither as held-to-maturity nor trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=65884222&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66010992&loc=d3e26610-111562 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27161-111563 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 2 -Subparagraph (b)-(g) -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62557-112803 + Details
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- Definition Amount of liability recognized arising from contingent consideration in a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 35 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6911338&loc=d3e6819-128478 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6408-128476 + Details
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- Definition Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958 + Details
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- Definition Amount of unrealized (holding) gain (loss) which is included in the statement of income (or changes in net assets) related to those assets still held at the reporting date for which fair value is measured on a recurring basis using significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Measure of dispersion, in percentage terms (for instance, the standard deviation or variance), for a given stock price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Percentage of adjustment to the observed price for a similar asset or liability when an identical transaction does not exist, used as an input to measure fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Risk that one party to the contract will default expressed as a percentage, used as an input to measure fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Loss, including interest and principal, incurred on a defaulted security, expressed as a percentage of the original principal balance, used as an input to measure fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Rate at which loans or a loan portfolio are expected to prepay principal balances, used as an input to measure fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Percentage of likelihood a loan will not be repaid and instead default, used as an input to measure fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition The percentage of the total value of investments that cannot be redeemed because of a redemption restriction as of the statement of financial position date. + References No definition available. + Details
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- Definition Amount of gain (loss) recognized in the income statement for financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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