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Fair Value Measurements Level 4 Fair Value Level 3 Roll Forward (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015 | Mar. 31, 2016 | Dec. 31, 2015 | Mar. 31, 2015 | Dec. 31, 2014
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale Equity Securities, Amortized Cost Basis |  | $ 772 |  |  |  | $ 772 |  |  |  |  | $ 1,135 |  |  |
Available-for-sale Securities, Debt Securities |  | 61,241 |  |  |  | 61,241 |  |  |  |  | 59,196 |  |  |
Financial and Nonfinancial Liabilities, Fair Value Disclosure |  | 1,432 |  |  |  | 1,432 |  |  |  |  | 1,086 |  |  |
Other Short-term Investments |  | 2,497 |  |  |  | 2,497 |  |  |  |  | 1,843 |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Marketable Securities, Fixed Maturities |  | 411 |  |  |  | 411 |  |  |  |  | 503 |  |  |
Trading Securities, Equity |  | 11 |  |  |  | 11 |  |  |  |  | 11 | [1] |  |
Available-for-sale Securities, Equity Securities |  | 827 |  |  |  | 827 |  |  |  |  | 1,121 |  |  |
Separate Account Assets |  | 117,851 |  |  |  | 117,851 |  |  |  |  | 120,123 |  |  |
Assets, Fair Value Disclosure |  | 180,046 |  |  |  | 180,046 |  |  |  |  | 181,633 |  |  |
Fixed Maturities [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure |  | 411 |  |  |  | 411 |  |  |  |  | 503 |  |  |
Equity Securities [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure |  | 0 |  |  |  | 0 |  |  |  |  | 282 |  |  |
Fair Value, Inputs, Level 1 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities |  | 509 |  |  |  | 509 |  |  |  |  | 740 |  |  |
Financial and Nonfinancial Liabilities, Fair Value Disclosure |  | 0 |  |  |  | 0 |  |  |  |  | 0 |  |  |
Other Short-term Investments |  | 457 |  |  |  | 457 |  |  |  |  | 333 |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Marketable Securities, Fixed Maturities |  | 0 |  |  |  | 0 |  |  |  |  | 2 |  |  |
Trading Securities, Equity |  | 11 |  |  |  | 11 |  |  |  |  | 11 | [1] |  |
Available-for-sale Securities, Equity Securities |  | 564 |  |  |  | 564 |  |  |  |  | 874 |  |  |
Assets, Fair Value Disclosure |  | 75,346 |  |  |  | 75,346 |  |  |  |  | 80,070 |  |  |
Fair Value, Inputs, Level 2 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities |  | 56,963 |  |  |  | 56,963 |  |  |  |  | 55,143 |  |  |
Financial and Nonfinancial Liabilities, Fair Value Disclosure |  | 1,131 |  |  |  | 1,131 |  |  |  |  | 900 |  |  |
Other Short-term Investments |  | 2,040 |  |  |  | 2,040 |  |  |  |  | 1,510 |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Marketable Securities, Fixed Maturities |  | 405 |  |  |  | 405 |  |  |  |  | 485 |  |  |
Trading Securities, Equity |  | 0 |  |  |  | 0 |  |  |  |  |  | [1] |  |
Available-for-sale Securities, Equity Securities |  | 166 |  |  |  | 166 |  |  |  |  | 154 |  |  |
Assets, Fair Value Disclosure |  | 99,380 |  |  |  | 99,380 |  |  |  |  | 95,907 |  |  |
Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities |  | 3,769 |  |  |  | 3,769 |  |  |  |  | 3,313 |  |  |
Financial and Nonfinancial Liabilities, Fair Value Disclosure |  | 301 |  |  |  | 301 |  |  |  |  | 186 |  |  |
Other Short-term Investments |  | 0 |  |  |  | 0 |  |  |  |  | 0 |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value |  | 171 |  | $ 286 |  | 171 |  | $ 286 |  | $ 154 | 139 |  | $ 137 | $ 112
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings | [2],[3],[4] |  |  |  |  | 0 |  | 1 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) | [5] | 3 |  | (1) |  | 7 |  | (1) |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases |  | 22 |  | 222 |  | 61 |  | 260 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements |  | (3) |  | (5) |  | (9) |  | (10) |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales |  | 6 |  | 19 |  | 16 |  | 25 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 | [6] | 3 |  | 5 |  | 6 |  | 6 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 |  | 2 | [6] | 53 |  | 17 | [6] | 57 | [6] |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) | [3],[7] |  |  |  |  | 0 |  | 1 |  |  |  |  |  |
Marketable Securities, Fixed Maturities |  | 6 |  |  |  | 6 |  |  |  |  | 16 |  |  |
Trading Securities, Equity |  | 0 |  |  |  | 0 |  |  |  |  |  | [1] |  |
Available-for-sale Securities, Equity Securities |  | 97 |  |  |  | 97 |  |  |  |  | 93 |  |  |
Assets, Fair Value Disclosure |  | 4,289 |  |  |  | 4,289 |  |  |  |  | 3,810 |  |  |
Fair Value, Inputs, Level 3 [Member] | Fixed Maturities [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value |  | 6 |  | 86 |  | 6 |  | 86 |  | 14 | 16 |  | 85 | 92
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings | [2],[3],[4] | 1 |  | (2) |  | (1) |  | (7) |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases |  | 1 |  | 7 |  | 6 |  | 19 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements |  | (1) |  |  |  | (2) |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales |  | 3 |  | 3 |  | 3 |  | 7 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 |  | 6 | [8] | 1 | [6] | 10 | [6] | 11 | [6] |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) | [3],[7] |  |  | (3) |  | (1) |  | (5) |  |  |  |  |  |
Fair Value, Inputs, Level 3 [Member] | Derivative [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3 | [6],[8] |  |  | 10 |  |  |  | 10 |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers out of Level 3 | [6],[8] | 6 |  | 23 |  | 6 |  | 23 |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs | [8] | 279 |  | 291 |  | 279 |  | 291 |  | 271 | 267 |  | 336 | 313
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings | [2],[3],[4],[8] | 2 |  | (67) |  | (8) |  | (49) |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements | [8] |  |  | (5) |  | (2) |  | (40) |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases | [8] |  |  | (6) |  | 16 |  | 34 |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Change in Unrealized Gain (Loss) | [3],[7],[8] | 2 |  | (57) |  | (8) |  | (50) |  |  |  |  |  |
GMWB Reinsurance [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value |  | 106 |  |  |  | 106 |  |  |  |  |  |  |  |
Credit Risk Contract [Member] | Fair Value, Inputs, Level 3 [Member] | Derivative [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers out of Level 3 | [6] |  |  | 23 |  |  |  | 23 |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs |  |  |  | 0 |  |  |  | 0 |  |  |  |  | (11) | (9)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings | [2],[3],[4] |  |  | (6) |  |  |  | (1) |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases |  |  |  | (6) |  |  |  | (13) |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Change in Unrealized Gain (Loss) | [3],[7] |  |  | (3) |  |  |  | 2 |  |  |  |  |  |
Commodity Contract [Member] | Fair Value, Inputs, Level 3 [Member] | Derivative [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3 | [6] |  |  | 10 |  |  |  | 10 |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs |  |  |  | 3 |  |  |  | 3 |  |  |  |  | 0 | 0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings | [2],[3],[4] |  |  | (7) |  |  |  | (7) |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Change in Unrealized Gain (Loss) | [3],[7] |  |  | (8) |  |  |  | (8) |  |  |  |  |  |
Equity Contract [Member] | Fair Value, Inputs, Level 3 [Member] | Derivative [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs |  | 1 |  | 3 |  | 1 |  | 3 |  | 5 | 0 |  | 8 | 6
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings | [2],[3],[4] | (4) |  | (5) |  | (15) |  | 12 |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements |  |  |  |  |  |  |  | (15) |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases |  |  |  |  |  | 16 |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Change in Unrealized Gain (Loss) | [3],[7] | (4) |  |  |  | (15) |  | 3 |  |  |  |  |  |
Interest Rate Contract [Member] | Fair Value, Inputs, Level 3 [Member] | Derivative [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs |  | (32) |  | (14) |  | (32) |  | (14) |  | (28) | (22) |  | (18) | (7)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings | [2],[3],[4] | (4) |  | 9 |  | (10) |  | (2) |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements |  |  |  | (5) |  |  |  | (5) |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Change in Unrealized Gain (Loss) | [3],[7] | (4) |  | 7 |  | (10) |  | (12) |  |  |  |  |  |
Other Contract [Member] | Fair Value, Inputs, Level 3 [Member] | Derivative [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs |  | 4 |  | 9 |  | 4 |  | 9 |  | 5 | 7 |  | 11 | 12
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings | [2],[3],[4] | (1) |  | (2) |  | (3) |  | (3) |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Change in Unrealized Gain (Loss) | [3],[7] | (1) |  | (3) |  | (3) |  | (4) |  |  |  |  |  |
Other Policyholder Funds and Benefits Payable [Member] | Equity Linked Notes [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value |  | (28) |  |  |  | (28) |  |  |  |  |  |  |  |
Fair Value, Measurements, Recurring [Member] | Other Liabilities [Member] | Embedded Derivative Financial Instruments [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) | [5] |  |  | 0 |  |  |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value |  |  |  | (3) |  |  |  | (3) |  |  |  |  | (3) | (3)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings | [2],[3],[4] |  |  | 0 |  |  |  | 0 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements |  |  |  | 0 |  |  |  | 0 |  |  |  |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss) | [3],[7] |  |  | 0 |  |  |  | 0 |  |  |  |  |  |
Fair Value, Measurements, Recurring [Member] | Other Policyholder Funds and Benefits Payable [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) | [5] |  |  | 0 |  |  |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value |  | (440) |  | (138) |  | (440) |  | (138) |  | (386) | (288) |  | (202) | (165)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings | [2],[3],[4] | (38) |  | 78 |  | (119) |  | 59 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Other Comprehensive Income (Loss) | [5] |  |  |  |  | 0 |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements |  | (16) |  | (14) |  | (33) |  | (32) |  |  |  |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss) | [3],[7] | (38) |  | 78 |  | (119) |  | 59 |  |  |  |  |  |
Fair Value, Measurements, Recurring [Member] | Other Policyholder Funds and Benefits Payable [Member] | Equity Linked Notes [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) | [5] |  |  | 0 |  |  |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value |  | (28) |  | (26) |  | (28) |  | (26) |  | (25) | (26) |  | (26) | (26)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings | [2],[3],[4] | (3) |  | 0 |  | (2) |  | 0 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Other Comprehensive Income (Loss) | [5] |  |  |  |  | 0 |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements |  | 0 |  | 0 |  | 0 |  | 0 |  |  |  |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss) | [3],[7] | (3) |  | 0 |  | (2) |  | 0 |  |  |  |  |  |
UNITED STATES | Reinsurance Recoverable [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value |  | 106 |  | 50 |  | 106 |  | 50 |  | 99 | 83 |  | 65 | 56
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings | [2],[3],[4] | 3 |  | (20) |  | 16 |  | (15) |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements |  | 4 |  | 5 |  | (7) |  | 9 |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) | [3],[7] | 3 |  | (20) |  | 16 |  | (15) |  |  |  |  |  |
UNITED STATES | US GMWB Hedging Instruments [Member] | Fair Value, Inputs, Level 3 [Member] | Derivative [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers out of Level 3 | [6] | 6 |  |  |  | 6 |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs |  | 165 |  | 125 |  | 165 |  | 125 |  | 144 | 135 |  | 159 | 170
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings | [2],[3],[4] | 15 |  | (34) |  | 24 |  | (25) |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements |  |  |  |  |  |  |  | (20) |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Change in Unrealized Gain (Loss) | [3],[7] | 15 |  | (32) |  | 24 |  | (16) |  |  |  |  |  |
UNITED STATES | US Macro Hedge Program [Member] | Fair Value, Inputs, Level 3 [Member] | Derivative [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs |  | 141 |  | 165 |  | 141 |  | 165 |  | 145 | 147 |  | 187 | 141
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings | [2],[3],[4] | (4) |  | (22) |  | (4) |  | (23) |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements |  |  |  |  |  | (2) |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases |  |  |  |  |  |  |  | 47 |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Change in Unrealized Gain (Loss) | [3],[7] | (4) |  | (18) |  | (4) |  | (15) |  |  |  |  |  |
UNITED STATES | Other Policyholder Funds and Benefits Payable [Member] | Guaranteed Minimum Withdrawal Benefit [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value |  | (412) |  | (112) |  | (412) |  | (112) |  | (361) | (262) |  | (176) | (139)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings | [2],[3],[4] | (35) |  | 78 |  | (117) |  | 59 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements |  | 16 |  | 14 |  | 33 |  | 32 |  |  |  |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss) | [3],[7] | (35) |  | 78 |  | (117) |  | 59 |  |  |  |  |  |
Equity Securities [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale Equity Securities, Amortized Cost Basis |  |  |  |  |  |  |  |  |  |  | 293 |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Equity Securities |  | 0 |  |  |  | 0 |  |  |  |  | 282 |  |  |
Available-for-sale Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fixed Maturities [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value |  | 3,769 |  | 3,391 |  | 3,769 |  | 3,391 |  | 3,554 | 3,313 |  | 3,700 | 3,475
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings | [2],[3],[4] | (1) |  | 1 |  | (15) |  | (7) |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) | [5] | 40 |  | (24) |  | 17 |  | (38) |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases |  | 165 |  | 206 |  | 582 |  | 590 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements |  | (226) |  | (135) |  | (300) |  | (204) |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales |  | 78 |  | 109 |  | 105 |  | 163 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 |  | 488 | [8] | 55 | [6] | 553 | [6] | 204 | [6] |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 |  | 173 | [8] | 303 | [6] | 276 | [6] | 466 | [6] |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) | [3],[7] | (1) |  | (1) |  | (2) |  | (5) |  |  |  |  |  |
Available-for-sale Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Equity Securities [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value |  | 97 |  | 97 |  | 97 |  | 97 |  | 92 | 93 |  | 102 | 98
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings | [2],[3],[4] | 1 |  | 11 |  |  |  | 12 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) | [5] | 5 |  | (1) |  | 7 |  | (4) |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases |  | 2 |  | 4 |  | 2 |  | 12 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales |  | 3 |  | 14 |  | 5 |  | 16 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 | [6] |  |  | 5 |  |  |  | 5 |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) | [3],[7] |  |  |  |  |  |  | 1 |  |  |  |  |  |
US Treasury Securities [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities |  | 4,619 |  |  |  | 4,619 |  |  |  |  | 4,665 |  |  |
US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities |  | 509 |  |  |  | 509 |  |  |  |  | 740 |  |  |
US Treasury Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities |  | 4,110 |  |  |  | 4,110 |  |  |  |  | 3,925 |  |  |
US Treasury Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities |  | 0 |  |  |  | 0 |  |  |  |  | 0 |  |  |
Residential Mortgage Backed Securities [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities |  | 4,826 |  |  |  | 4,826 |  |  |  |  | 4,046 |  |  |
Residential Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities |  | 0 |  |  |  | 0 |  |  |  |  | 0 |  |  |
Residential Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities |  | 2,953 |  |  |  | 2,953 |  |  |  |  | 2,424 |  |  |
Residential Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities |  | 1,873 |  |  |  | 1,873 |  |  |  |  | 1,622 |  |  |
Residential Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities |  | 1,873 |  |  |  | 1,873 |  |  |  |  | 1,622 |  |  |
Residential Mortgage Backed Securities [Member] | Available-for-sale Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fixed Maturities [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value |  | 1,873 |  | 1,540 |  | 1,873 |  | 1,540 |  | 1,886 | 1,622 |  | 1,463 | 1,281
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings | [2],[3],[4] |  |  | (1) |  |  |  | (2) |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) | [5] | 10 |  | 1 |  | (4) |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases |  | 97 |  | 135 |  | 430 |  | 445 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements |  | (101) |  | (47) |  | (158) |  | (93) |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales |  |  |  | 54 |  |  |  | 85 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 |  | 3 | [8] | 43 | [6] | 5 | [6] | 47 | [6] |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 |  | 22 | [8] |  |  | 22 | [6] | 53 | [6] |  |  |  |  |
Corporate Debt Securities [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities |  | 27,158 |  |  |  | 27,158 |  |  |  |  | 26,802 |  |  |
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities |  | 0 |  |  |  | 0 |  |  |  |  | 0 |  |  |
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities |  | 26,022 |  |  |  | 26,022 |  |  |  |  | 25,948 |  |  |
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities |  | 1,136 |  |  |  | 1,136 |  |  |  |  | 854 |  |  |
Corporate Debt Securities [Member] | Available-for-sale Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fixed Maturities [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value |  | 1,136 |  | 931 |  | 1,136 |  | 931 |  | 834 | 854 |  | 1,112 | 1,040
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings | [2],[3],[4] | (1) |  |  |  | (14) |  | (4) |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) | [5] | 19 |  | (14) |  | 12 |  | (42) |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases |  | 37 |  | 18 |  | 67 |  | 23 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements |  | (50) |  | (30) |  | (55) |  | (29) |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales |  | 66 |  | 26 |  | 91 |  | 33 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 |  | 455 | [8] | 12 | [6] | 513 | [6] | 151 | [6] |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 |  | 92 | [8] | 141 | [6] | 150 | [6] | 175 | [6] |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) | [3],[7] | (1) |  | 1 |  | (1) |  | (1) |  |  |  |  |  |
US States and Political Subdivisions Debt Securities [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities |  | 12,611 |  |  |  | 12,611 |  |  |  |  | 12,121 |  |  |
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities |  | 0 |  |  |  | 0 |  |  |  |  | 0 |  |  |
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities |  | 12,521 |  |  |  | 12,521 |  |  |  |  | 12,072 |  |  |
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities |  | 90 |  |  |  | 90 |  |  |  |  | 49 |  |  |
US States and Political Subdivisions Debt Securities [Member] | Available-for-sale Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fixed Maturities [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value |  | 90 |  | 49 |  | 90 |  | 49 |  | 50 | 49 |  | 64 | 66
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings | [2],[3],[4] |  |  | 1 |  |  |  | 1 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) | [5] | 4 |  | (3) |  | 5 |  | (5) |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases |  | 20 |  |  |  | 20 |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements |  |  |  | (13) |  |  |  | (13) |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 |  | 16 | [8] |  |  | 16 | [6] |  |  |  |  |  |  |
Collateralized Debt Obligations [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities | [9] | 2,867 |  |  |  | 2,867 |  |  |  |  | 3,038 |  |  |
Collateralized Debt Obligations [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities |  | 0 |  |  |  | 0 |  |  |  |  | 0 |  |  |
Collateralized Debt Obligations [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities |  | 2,389 |  |  |  | 2,389 |  |  |  |  | 2,497 |  |  |
Collateralized Debt Obligations [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities |  | 478 |  |  |  | 478 |  |  |  |  | 541 |  |  |
Collateralized Debt Obligations [Member] | Available-for-sale Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fixed Maturities [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value |  | 478 |  | 564 |  | 478 |  | 564 |  | 542 | 541 |  | 584 | 623
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings | [2],[3],[4] | (1) |  | (2) |  | (1) |  | (4) |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) | [5] | (2) |  | (2) |  | (2) |  | 17 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements |  | (61) |  | (16) |  | (60) |  | (25) |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 | [6] |  |  |  |  |  |  | 47 |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) | [3],[7] |  |  | (2) |  |  |  | (4) |  |  |  |  |  |
Commercial Mortgage Backed Securities [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities |  | 5,195 |  |  |  | 5,195 |  |  |  |  | 4,717 |  |  |
Commercial Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities |  | 0 |  |  |  | 0 |  |  |  |  | 0 |  |  |
Commercial Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities |  | 5,116 |  |  |  | 5,116 |  |  |  |  | 4,567 |  |  |
Commercial Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities |  | 79 |  |  |  | 79 |  |  |  |  | 150 |  |  |
Commercial Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities |  | 58 |  |  |  | 58 |  |  |  |  | 122 |  |  |
Commercial Mortgage Backed Securities [Member] | Available-for-sale Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fixed Maturities [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value |  | 79 |  | 214 |  | 79 |  | 214 |  | 134 | 150 |  | 268 | 284
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings | [2],[3],[4] |  |  | 2 |  | (1) |  | 1 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) | [5] | 5 |  |  |  | (3) |  | (3) |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases |  | 10 |  | 18 |  | 50 |  | 39 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements |  | (9) |  | (25) |  | (18) |  | (38) |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales |  | 3 |  | 6 |  | 3 |  | 6 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 |  | 1 | [8] |  |  | 1 | [6] | 5 | [6] |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 |  | 59 | [8] | 43 | [6] | 97 | [6] | 68 | [6] |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) | [3],[7] |  |  | (1) |  | (1) |  | (1) |  |  |  |  |  |
Asset-backed Securities [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities |  | 2,777 |  |  |  | 2,777 |  |  |  |  | 2,499 |  |  |
Asset-backed Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities |  | 0 |  |  |  | 0 |  |  |  |  | 0 |  |  |
Asset-backed Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities |  | 2,736 |  |  |  | 2,736 |  |  |  |  | 2,462 |  |  |
Asset-backed Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities |  | 41 |  |  |  | 41 |  |  |  |  | 37 |  |  |
Asset-backed Securities [Member] | Available-for-sale Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fixed Maturities [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value |  | 41 |  | 53 |  | 41 |  | 53 |  | 32 | 37 |  | 161 | 122
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings | [2],[3],[4] |  |  | 1 |  |  |  | 1 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) | [5] |  |  | (2) |  |  |  | (2) |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases |  |  |  | 28 |  |  |  | 71 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements |  | (4) |  | (3) |  | (7) |  | (4) |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales |  |  |  | 13 |  |  |  | 13 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 |  | 13 | [8] |  |  | 18 | [6] | 1 | [6] |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 | [6] |  |  | 119 |  | 7 |  | 123 |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) | [3],[7] |  |  | 1 |  |  |  | 1 |  |  |  |  |  |
Foreign Government Debt Securities [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities |  | 1,188 |  |  |  | 1,188 |  |  |  |  | 1,308 |  |  |
Foreign Government Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities |  | 0 |  |  |  | 0 |  |  |  |  | 0 |  |  |
Foreign Government Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities |  | 1,116 |  |  |  | 1,116 |  |  |  |  | 1,248 |  |  |
Foreign Government Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Debt Securities |  | 72 |  |  |  | 72 |  |  |  |  | 60 |  |  |
Foreign Government Debt Securities [Member] | Available-for-sale Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fixed Maturities [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value |  | 72 |  | 40 |  | 72 |  | 40 |  | $ 76 | $ 60 |  | $ 48 | $ 59
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings | [2],[3],[4] | 1 |  |  |  | 1 |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) | [5] | 4 |  | (4) |  | 9 |  | (3) |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases |  | 1 |  | 7 |  | 15 |  | 12 |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements |  | (1) |  | (1) |  | (2) |  | (2) |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales |  | $ 9 |  | $ 10 |  | $ 11 |  | $ 26 |  |  |  |  |  |
[1] | [1]Included in other investments on the Condensed Consolidated Balance Sheets.
[2] | [1]The Company classifies realized and unrealized gains (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 derivatives and embedded derivatives.
[3] | [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.
[4] | [6]Includes both market and non-market impacts in deriving realized and unrealized gains (losses).
[5] | [3]All amounts are before income taxes and amortization of DAC.
[6] | [4]Transfers in and/or (out) of Level 3 are primarily attributable to the availability of market observable information and the re-evaluation of the observability of pricing inputs.
[7] | [7]Amounts presented are for Level 3 only and therefore may not agree to other disclosures included herein.
[8] | [5]Derivative instruments are reported in this table on a net basis for asset (liability) positions and reported in the Condensed Consolidated Balance Sheets in other investments and other liabilities.
[9] | Gross unrealized gains (losses) exclude the fair value of bifurcated embedded derivatives within certain securities. Subsequent changes in value are recorded in net realized capital gains (losses).

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