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Fair Value Measurements Level 4 Fair Value by Hierarchy (Details) - Fair Value, Option, Eligible Item or Group [Domain] - USD ($) $ in Millions | Jun. 30, 2015 | Dec. 31, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Sep. 30, 2013
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Fair Value, Assets, Level 1 to Level 2 Transfers, Amount |  | $ 0 |  |  |  | $ 0 |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Total fixed maturities |  | 59,128 |  | $ 59,384 |  |  |  |
Fixed maturities, FVO |  | 553 |  | 488 |  |  |  |
Trading Securities, Equity |  | 11 |  | 11 | [1] |  |  |
Available-for-sale Securities, Equity Securities |  | 856 |  | 1,047 |  |  |  |
Short-term investments |  | 3,278 |  | 4,883 |  |  |  |
Alternative Investments, Fair Value Disclosure |  | 3,033 |  | 2,942 |  |  |  |
Reinsurance recoverable for U.S. GMWB |  | 22,891 |  | 22,920 |  |  |  |
Separate account assets |  | 131,489 |  | 134,702 |  |  |  |
Assets, Fair Value Disclosure |  | 192,758 |  | 199,248 |  |  |  |
Liabilities, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Total liabilities accounted for at fair value on a recurring basis |  | (1,020) |  | (1,095) |  |  |  |
Derivative Liability, Fair Value, Amount Offset Against Collateral |  | 210 |  | 137 |  |  |  |
Other policyholder funds and benefits payable [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | (138) |  |  |  |  |  |
Credit derivative [Member] | Other Investments [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 33 |  | 8 |  |  |  |
Credit derivative [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | (26) |  |  |  |  |  |
Commodity Contract [Member] | Other Investments [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 2 |  |  |  |  |  |
Commodity Contract [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 1 |  |  |  |  |  |
Equity Contract [Member] | Other Investments [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  |  | 3 |  |  |  |
Equity Contract [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 28 |  |  |  |  |  |
Foreign Exchange Contract [Member] | Other Investments [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 9 |  |  |  |  |  |
Foreign Exchange Contract [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | (479) |  |  |  |  |  |
Interest Rate Contract [Member] | Other Investments [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 68 |  | 129 |  |  |  |
Interest Rate Contract [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | (515) |  |  |  |  |  |
Other Contract [Member] | Other Investments [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 9 |  | 12 |  |  |  |
Derivative Financial Instruments, Assets [Member] | Other Investments [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net | [1] | 308 |  | 364 | [2] |  |  |
Derivative Financial Instruments, Liabilities [Member] |  |  |  |  |  |  |  |
Liabilities, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Liability, Fair Value, Amount Offset Against Collateral |  | 289 |  | 413 |  |  |  |
Derivative Financial Instruments, Liabilities [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net | [3] | (879) |  | (927) | [4] |  |  |
Embedded Derivative Financial Instruments [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | (3) | [4] | (3) | [5] |  |  |
ABS [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Total fixed maturities |  | 2,890 |  | 2,472 |  |  |  |
Collateralized Debt Obligations [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Total fixed maturities | [6] | 3,218 |  | 2,841 |  |  |  |
CMBS [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Total fixed maturities |  | 4,664 |  | 4,415 |  |  |  |
Corporate [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Total fixed maturities |  | 26,610 |  | 27,359 |  |  |  |
Foreign Government Debt Securities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Total fixed maturities |  | 1,313 |  | 1,636 |  |  |  |
Municipal [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Total fixed maturities |  | 12,298 |  | 12,871 |  |  |  |
RMBS [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Total fixed maturities |  | 3,969 |  | 3,918 |  |  |  |
U.S. Treasuries [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Total fixed maturities |  | 4,166 |  | 3,872 |  |  |  |
Level 1 [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Total fixed maturities |  | 471 |  | 106 |  |  |  |
Fixed maturities, FVO |  | 0 |  | 0 |  |  |  |
Trading Securities, Equity |  | 11 |  | 11 | [1] |  |  |
Available-for-sale Securities, Equity Securities |  | 588 |  | 786 |  |  |  |
Short-term investments |  | 588 |  | 349 |  |  |  |
Assets, Fair Value Disclosure |  | 88,954 |  | 92,789 |  |  |  |
Liabilities, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Total liabilities accounted for at fair value on a recurring basis |  | 0 |  | 0 |  |  |  |
Level 1 [Member] | Other policyholder funds and benefits payable [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 |  |  |  |  |  |
Level 1 [Member] | Credit derivative [Member] | Other Investments [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 |  | 0 |  |  |  |
Level 1 [Member] | Credit derivative [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 |  |  |  |  |  |
Level 1 [Member] | Commodity Contract [Member] | Other Investments [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 |  |  |  |  |  |
Level 1 [Member] | Commodity Contract [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 |  |  |  |  |  |
Level 1 [Member] | Equity Contract [Member] | Other Investments [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  |  | 0 |  |  |  |
Level 1 [Member] | Equity Contract [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 |  |  |  |  |  |
Level 1 [Member] | Foreign Exchange Contract [Member] | Other Investments [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 |  |  |  |  |  |
Level 1 [Member] | Foreign Exchange Contract [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 |  |  |  |  |  |
Level 1 [Member] | Interest Rate Contract [Member] | Other Investments [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 |  | 0 |  |  |  |
Level 1 [Member] | Interest Rate Contract [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 |  |  |  |  |  |
Level 1 [Member] | Other Contract [Member] | Other Investments [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 |  | 0 |  |  |  |
Level 1 [Member] | Derivative Financial Instruments, Liabilities [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 | [3] | 0 | [4] |  |  |
Level 1 [Member] | Embedded Derivative Financial Instruments [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 | [4] | 0 | [5] |  |  |
Level 1 [Member] | ABS [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Total fixed maturities |  | 0 |  | 0 |  |  |  |
Level 1 [Member] | Collateralized Debt Obligations [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Total fixed maturities |  | 0 |  | 0 |  |  |  |
Level 1 [Member] | CMBS [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Total fixed maturities |  | 0 |  | 0 |  |  |  |
Level 1 [Member] | Corporate [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Total fixed maturities |  | 0 |  | 0 |  |  |  |
Level 1 [Member] | Foreign Government Debt Securities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Total fixed maturities |  | 0 |  | 0 |  |  |  |
Level 1 [Member] | Municipal [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Total fixed maturities |  | 0 |  | 0 |  |  |  |
Level 1 [Member] | RMBS [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Total fixed maturities |  | 0 |  | 0 |  |  |  |
Level 1 [Member] | U.S. Treasuries [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Total fixed maturities |  | 471 |  | 106 |  |  |  |
Level 2 [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Total fixed maturities |  | 55,266 |  | 55,803 |  |  |  |
Fixed maturities, FVO |  | 467 |  | 396 |  |  |  |
Trading Securities, Equity |  | 0 |  | 0 | [1] |  |  |
Available-for-sale Securities, Equity Securities |  | 171 |  | 163 |  |  |  |
Short-term investments |  | 2,690 |  | 4,534 |  |  |  |
Assets, Fair Value Disclosure |  | 99,009 |  | 101,735 |  |  |  |
Liabilities, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Total liabilities accounted for at fair value on a recurring basis |  | (964) |  | (1,004) |  |  |  |
Level 2 [Member] | Other policyholder funds and benefits payable [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 |  |  |  |  |  |
Level 2 [Member] | Credit derivative [Member] | Other Investments [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 33 |  | 10 |  |  |  |
Level 2 [Member] | Credit derivative [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | (26) |  |  |  |  |  |
Level 2 [Member] | Commodity Contract [Member] | Other Investments [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 |  |  |  |  |  |
Level 2 [Member] | Commodity Contract [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 |  |  |  |  |  |
Level 2 [Member] | Equity Contract [Member] | Other Investments [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  |  | 0 |  |  |  |
Level 2 [Member] | Equity Contract [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 25 |  |  |  |  |  |
Level 2 [Member] | Foreign Exchange Contract [Member] | Other Investments [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 9 |  |  |  |  |  |
Level 2 [Member] | Foreign Exchange Contract [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | (479) |  |  |  |  |  |
Level 2 [Member] | Interest Rate Contract [Member] | Other Investments [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 54 |  | 113 |  |  |  |
Level 2 [Member] | Interest Rate Contract [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | (487) |  |  |  |  |  |
Level 2 [Member] | Other Contract [Member] | Other Investments [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 |  | 0 |  |  |  |
Level 2 [Member] | Derivative Financial Instruments, Assets [Member] | Other Investments [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 102 | [1] | 128 | [2] |  |  |
Level 2 [Member] | Derivative Financial Instruments, Liabilities [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | (964) | [3] | (1,004) | [4] |  |  |
Level 2 [Member] | Embedded Derivative Financial Instruments [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 | [4] | 0 | [5] |  |  |
Level 2 [Member] | ABS [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Total fixed maturities |  | 2,837 |  | 2,350 |  |  |  |
Level 2 [Member] | Collateralized Debt Obligations [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Total fixed maturities |  | 2,654 |  | 2,218 |  |  |  |
Level 2 [Member] | CMBS [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Total fixed maturities |  | 4,450 |  | 4,131 |  |  |  |
Level 2 [Member] | Corporate [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Total fixed maturities |  | 25,679 |  | 26,319 |  |  |  |
Level 2 [Member] | Foreign Government Debt Securities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Total fixed maturities |  | 1,273 |  | 1,577 |  |  |  |
Level 2 [Member] | Municipal [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Total fixed maturities |  | 12,249 |  | 12,805 |  |  |  |
Level 2 [Member] | RMBS [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Total fixed maturities |  | 2,429 |  | 2,637 |  |  |  |
Level 2 [Member] | U.S. Treasuries [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Total fixed maturities |  | 3,695 |  | 3,766 |  |  |  |
Level 3 [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Total fixed maturities |  | 3,391 |  | 3,475 |  |  |  |
Fixed maturities, FVO |  | 86 |  | 92 |  |  |  |
Trading Securities, Equity |  | 0 |  | 0 | [1] |  |  |
Available-for-sale Securities, Equity Securities |  | 97 |  | 98 |  |  |  |
Short-term investments |  | 0 |  | 0 |  |  |  |
Assets, Fair Value Disclosure |  | 4,795 |  | 4,724 |  |  |  |
Liabilities, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Total liabilities accounted for at fair value on a recurring basis |  | (56) |  | (91) |  |  |  |
Level 3 [Member] | Other policyholder funds and benefits payable [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | (138) |  |  |  |  |  |
Level 3 [Member] | Credit derivative [Member] | Other Investments [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 |  | (2) |  |  |  |
Level 3 [Member] | Credit derivative [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 |  |  |  |  |  |
Level 3 [Member] | Commodity Contract [Member] | Other Investments [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 2 |  |  |  |  |  |
Level 3 [Member] | Commodity Contract [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 1 |  |  |  |  |  |
Level 3 [Member] | Equity Contract [Member] | Other Investments [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  |  | 3 |  |  |  |
Level 3 [Member] | Equity Contract [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 3 |  |  |  |  |  |
Level 3 [Member] | Foreign Exchange Contract [Member] | Other Investments [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 |  |  |  |  |  |
Level 3 [Member] | Foreign Exchange Contract [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 |  |  |  |  |  |
Level 3 [Member] | Interest Rate Contract [Member] | Other Investments [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 14 |  | 16 |  |  |  |
Level 3 [Member] | Interest Rate Contract [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | (28) |  |  |  |  |  |
Level 3 [Member] | Other Contract [Member] | Other Investments [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 9 |  | 12 |  |  |  |
Level 3 [Member] | Derivative Financial Instruments, Assets [Member] | Other Investments [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 206 | [1] | 236 | [2] |  |  |
Level 3 [Member] | Derivative Financial Instruments, Liabilities [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 85 | [3] | 77 | [4] |  |  |
Level 3 [Member] | Embedded Derivative Financial Instruments [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | (3) | [4] | (3) | [5] |  |  |
Level 3 [Member] | ABS [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Total fixed maturities |  | 53 |  | 122 |  |  |  |
Level 3 [Member] | Collateralized Debt Obligations [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Total fixed maturities |  | 564 |  | 623 |  |  |  |
Level 3 [Member] | CMBS [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Total fixed maturities |  | 214 |  | 284 |  |  |  |
Level 3 [Member] | Corporate [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Total fixed maturities |  | 931 |  | 1,040 |  |  |  |
Level 3 [Member] | Foreign Government Debt Securities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Total fixed maturities |  | 40 |  | 59 |  |  |  |
Level 3 [Member] | Municipal [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Total fixed maturities |  | 49 |  | 66 |  |  |  |
Level 3 [Member] | RMBS [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Total fixed maturities |  | 1,540 |  | 1,281 |  |  |  |
Level 3 [Member] | U.S. Treasuries [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Total fixed maturities |  | 0 |  | 0 |  |  |  |
Fair Value, Measurements, Recurring [Member] | Other policyholder funds and benefits payable [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  |  | (165) |  |  |  |
Fair Value, Measurements, Recurring [Member] | Credit derivative [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  |  | (16) |  |  |  |
Fair Value, Measurements, Recurring [Member] | Equity Contract [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  |  | 28 |  |  |  |
Fair Value, Measurements, Recurring [Member] | Foreign Exchange Contract [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  |  | (445) |  |  |  |
Fair Value, Measurements, Recurring [Member] | Interest Rate Contract [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  |  | (597) |  |  |  |
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Other policyholder funds and benefits payable [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  |  | 0 |  |  |  |
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Credit derivative [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  |  | 0 |  |  |  |
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Equity Contract [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  |  | 0 |  |  |  |
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Foreign Exchange Contract [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  |  | 0 |  |  |  |
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Interest Rate Contract [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  |  | 0 |  |  |  |
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Other policyholder funds and benefits payable [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  |  | 0 |  |  |  |
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Credit derivative [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  |  | (9) |  |  |  |
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Equity Contract [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  |  | 25 |  |  |  |
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Foreign Exchange Contract [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  |  | (445) |  |  |  |
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Interest Rate Contract [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  |  | (574) |  |  |  |
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Alternative Investments, Fair Value Disclosure |  | 230 |  | 189 |  |  |  |
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Other policyholder funds and benefits payable [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  |  | (165) |  |  |  |
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Credit derivative [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  |  | (7) |  |  |  |
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Equity Contract [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  |  | 3 |  |  |  |
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Foreign Exchange Contract [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  |  | 0 |  |  |  |
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Interest Rate Contract [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  |  | (23) |  |  |  |
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | CMBS [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Total fixed maturities |  | 214 |  | 284 |  |  |  |
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | RMBS [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Total fixed maturities |  | 1,540 |  | 1,281 |  |  |  |
Interim Period [Member] | U.S. Treasuries [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Fair Value, Assets, Level 1 to Level 2 Transfers, Amount |  | 417 |  |  |  | 309 |  |
Fair Value, Assets, Level 1 to Level 2 Transfers, Amount |  | 0 |  |  |  |  | $ 0 |
Annual Period [Member] | U.S. Treasuries [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Fair Value, Assets, Level 1 to Level 2 Transfers, Amount |  | 524 |  |  |  | $ 1,600 |  |
Fair Value, Assets, Level 1 to Level 2 Transfers, Amount |  | 0 |  |  |  |  |  | $ 0
US GMWB Hedging Instruments [Member] | Level 3 [Member] | Other Contract [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 125 |  | 124 |  |  |  |
US GMWB Hedging Instruments [Member] | UNITED STATES | Other Investments [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 87 |  | 119 |  |  |  |
US GMWB Hedging Instruments [Member] | UNITED STATES | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 47 |  | 55 |  |  |  |
US GMWB Hedging Instruments [Member] | UNITED STATES | Level 1 [Member] | Other Investments [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 |  | 0 |  |  |  |
US GMWB Hedging Instruments [Member] | UNITED STATES | Level 1 [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 |  | 0 |  |  |  |
US GMWB Hedging Instruments [Member] | UNITED STATES | Level 2 [Member] | Other Investments [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 6 |  | 5 |  |  |  |
US GMWB Hedging Instruments [Member] | UNITED STATES | Level 2 [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 3 |  | (1) |  |  |  |
US GMWB Hedging Instruments [Member] | UNITED STATES | Level 3 [Member] | Other Investments [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 81 |  | 114 |  |  |  |
US GMWB Hedging Instruments [Member] | UNITED STATES | Level 3 [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 44 |  | 56 |  |  |  |
Equity Linked Notes [Member] | Other policyholder funds and benefits payable [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | (26) |  |  |  |  |  |
Equity Linked Notes [Member] | Level 1 [Member] | Other policyholder funds and benefits payable [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 |  |  |  |  |  |
Equity Linked Notes [Member] | Level 2 [Member] | Other policyholder funds and benefits payable [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 |  |  |  |  |  |
Equity Linked Notes [Member] | Level 3 [Member] | Other policyholder funds and benefits payable [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | (26) |  |  |  |  |  |
Equity Linked Notes [Member] | Fair Value, Measurements, Recurring [Member] | Other policyholder funds and benefits payable [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  |  | (26) |  |  |  |
Equity Linked Notes [Member] | Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Other policyholder funds and benefits payable [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  |  | 0 |  |  |  |
Equity Linked Notes [Member] | Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Other policyholder funds and benefits payable [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  |  | 0 |  |  |  |
Equity Linked Notes [Member] | Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Other policyholder funds and benefits payable [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  |  | (26) |  |  |  |
GMWB Reinsurance [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Reinsurance recoverable for U.S. GMWB |  | 50 |  | 56 |  |  |  |
GMWB Reinsurance [Member] | Level 1 [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Reinsurance recoverable for U.S. GMWB |  | 0 |  | 0 |  |  |  |
GMWB Reinsurance [Member] | Level 2 [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Reinsurance recoverable for U.S. GMWB |  | 0 |  | 0 |  |  |  |
GMWB Reinsurance [Member] | Level 3 [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Reinsurance recoverable for U.S. GMWB |  | 50 |  | 56 |  |  |  |
Coinsurance and Modified Coinsurance Reinsurance Contracts [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Reinsurance recoverable for U.S. GMWB |  | 60 |  | 34 |  |  |  |
Coinsurance and Modified Coinsurance Reinsurance Contracts [Member] | Level 1 [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Reinsurance recoverable for U.S. GMWB |  | 0 |  | 0 |  |  |  |
Coinsurance and Modified Coinsurance Reinsurance Contracts [Member] | Level 2 [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Reinsurance recoverable for U.S. GMWB |  | 60 |  | 34 |  |  |  |
Coinsurance and Modified Coinsurance Reinsurance Contracts [Member] | Level 3 [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Reinsurance recoverable for U.S. GMWB |  | 0 |  | 0 |  |  |  |
Macro Hedge Program [Member] | UNITED STATES | Other Investments [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 100 |  | 93 |  |  |  |
Macro Hedge Program [Member] | UNITED STATES | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 65 |  | 48 |  |  |  |
Macro Hedge Program [Member] | UNITED STATES | Level 1 [Member] | Other Investments [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 |  | 0 |  |  |  |
Macro Hedge Program [Member] | UNITED STATES | Level 1 [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 |  | 0 |  |  |  |
Macro Hedge Program [Member] | UNITED STATES | Level 2 [Member] | Other Investments [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 |  | 0 |  |  |  |
Macro Hedge Program [Member] | UNITED STATES | Level 2 [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 |  | 0 |  |  |  |
Macro Hedge Program [Member] | UNITED STATES | Level 3 [Member] | Other Investments [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 100 |  | 93 |  |  |  |
Macro Hedge Program [Member] | UNITED STATES | Level 3 [Member] | Other liabilities [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 65 |  | 48 |  |  |  |
Guaranteed Minimum Withdrawal Benefit [Member] | UNITED STATES | Other policyholder funds and benefits payable [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | (112) |  |  |  |  |  |
Guaranteed Minimum Withdrawal Benefit [Member] | UNITED STATES | Level 1 [Member] | Other policyholder funds and benefits payable [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 |  |  |  |  |  |
Guaranteed Minimum Withdrawal Benefit [Member] | UNITED STATES | Level 2 [Member] | Other policyholder funds and benefits payable [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 |  |  |  |  |  |
Guaranteed Minimum Withdrawal Benefit [Member] | UNITED STATES | Level 3 [Member] | Other policyholder funds and benefits payable [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | (112) |  |  |  |  |  |
Guaranteed Minimum Withdrawal Benefit [Member] | UNITED STATES | Fair Value, Measurements, Recurring [Member] | Other policyholder funds and benefits payable [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  |  | (139) |  |  |  |
Guaranteed Minimum Withdrawal Benefit [Member] | UNITED STATES | Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Other policyholder funds and benefits payable [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  |  | 0 |  |  |  |
Guaranteed Minimum Withdrawal Benefit [Member] | UNITED STATES | Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Other policyholder funds and benefits payable [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  |  | 0 |  |  |  |
Guaranteed Minimum Withdrawal Benefit [Member] | UNITED STATES | Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Other policyholder funds and benefits payable [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  |  | (139) |  |  |  |
Portion at Fair Value Measurement [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Alternative Investments, Fair Value Disclosure |  | 835 | [2] | 770 | [7] |  |  |
Separate account assets |  | 127,679 | [7] | 132,211 | [3] |  |  |
Portion at Fair Value Measurement [Member] | Level 1 [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Alternative Investments, Fair Value Disclosure |  | 0 | [2] | 0 | [7] |  |  |
Separate account assets |  | 87,296 | [7] | 91,537 | [3] |  |  |
Portion at Fair Value Measurement [Member] | Level 2 [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Alternative Investments, Fair Value Disclosure |  | 605 | [2] | 581 | [7] |  |  |
Separate account assets |  | 39,648 | [7] | 40,096 | [3] |  |  |
Portion at Fair Value Measurement [Member] | Level 3 [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Alternative Investments, Fair Value Disclosure |  | 230 | [2] | 189 | [7] |  |  |
Separate account assets |  | 735 | [7] | 578 | [3] |  |  |
Portion at Other than Fair Value Measurement [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |
Separate account assets | [7] | $ 3,800 |  | $ 2,500 |  |  |  |
[1] | [1]Included in other investments on the Condensed Consolidated Balance Sheets.
[2] | [2]Includes over-the-counter ("OTC") and OTC-cleared derivative instruments in a net positive fair value position after consideration of the accrued interest and impact of collateral posting requirements which may be imposed by agreements, clearing house rules and applicable law. As of June 30, 2015 and December 31, 2014, $289 and $413, respectively, of cash collateral liability was netted against the derivative asset value in the Condensed Consolidated Balance Sheets and is excluded from the preceding table. See the following footnote 4 for derivative liabilities.
[3] | [4]Approximately $3.8 billion and $2.5 billion of investment sales receivable, as of June 30, 2015 and December 31, 2014, respectively, are excluded from this disclosure requirement because they are trade receivables in the ordinary course of business where the carrying amount approximates fair value.
[4] | [5]Includes OTC and OTC-cleared derivative instruments in a net negative fair market value position (derivative liability) after consideration of the accrued interest and impact of collateral posting requirements which may be imposed by agreements, clearing house rules and applicable law. In the following Level 3 roll-forward table in this Note 4, the derivative assets and liabilities are referred to as “freestanding derivatives” and are presented on a net basis.
[5] | [6]Represents embedded derivatives associated with non-funding agreement-backed consumer equity linked notes.
[6] | Gross unrealized gains (losses) exclude the fair value of bifurcated, embedded derivative features of certain securities. Subsequent changes in value are recorded in net realized capital gains (losses).
[7] | [3]Represents hedge funds where investment company accounting has been applied to a wholly-owned fund of funds measured at fair value.

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