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Fair Value Measurements Level 4 Fair Value by Hierarchy (Details) - USD ($) $ in Millions | Dec. 31, 2015 | Dec. 31, 2014
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Available-for-sale Securities, Debt Securities |  | $ 59,196 | $ 59,384
Assets, Fair Value Disclosure [Abstract] |  |  |
Marketable Securities, Fixed Maturities |  | 503 | 488
Trading Securities, Equity | [1] | 11 | 11
Available-for-sale Securities, Equity Securities |  | 1,121 | 1,047
Other Short-term Investments |  | 1,843 | 4,883
Alternative Investments, Fair Value Disclosure |  | 2,874 | 2,942
Reinsurance Recoverables |  | 23,189 | 22,920
Separate Account Assets |  | 120,123 | 134,702
Assets, Fair Value Disclosure |  | 181,633 | 199,248
Liabilities, Fair Value Disclosure [Abstract] |  |  |
Financial and Nonfinancial Liabilities, Fair Value Disclosure |  | (1,086) | (1,095)
Derivative Liability, Fair Value, Amount Offset Against Collateral |  | 23 | 137
Fair Value, Inputs, Level 1 [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Available-for-sale Securities, Debt Securities |  | 740 | 106
Assets, Fair Value Disclosure [Abstract] |  |  |
Marketable Securities, Fixed Maturities |  | 2 | 0
Trading Securities, Equity | [1] | 11 | 11
Available-for-sale Securities, Equity Securities |  | 874 | 786
Other Short-term Investments |  | 333 | 349
Assets, Fair Value Disclosure |  | 80,070 | 92,789
Liabilities, Fair Value Disclosure [Abstract] |  |  |
Financial and Nonfinancial Liabilities, Fair Value Disclosure |  | 0 | 0
Fair Value, Inputs, Level 2 [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Available-for-sale Securities, Debt Securities |  | 55,143 | 55,803
Assets, Fair Value Disclosure [Abstract] |  |  |
Marketable Securities, Fixed Maturities |  | 485 | 396
Trading Securities, Equity | [1] | 0 | 0
Available-for-sale Securities, Equity Securities |  | 154 | 163
Other Short-term Investments |  | 1,510 | 4,534
Assets, Fair Value Disclosure |  | 97,314 | 101,735
Liabilities, Fair Value Disclosure [Abstract] |  |  |
Financial and Nonfinancial Liabilities, Fair Value Disclosure |  | (900) | (1,004)
Fair Value, Inputs, Level 3 [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Available-for-sale Securities, Debt Securities |  | 3,313 | 3,475
Assets, Fair Value Disclosure [Abstract] |  |  |
Marketable Securities, Fixed Maturities |  | 16 | 92
Trading Securities, Equity | [1] | 0 | 0
Available-for-sale Securities, Equity Securities |  | 93 | 98
Other Short-term Investments |  | 0 | 0
Assets, Fair Value Disclosure |  | 4,249 | 4,724
Liabilities, Fair Value Disclosure [Abstract] |  |  |
Financial and Nonfinancial Liabilities, Fair Value Disclosure |  | (186) | (91)
Asset-backed Securities [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Available-for-sale Securities, Debt Securities |  | 2,499 | 2,472
Asset-backed Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Available-for-sale Securities, Debt Securities |  | 0 | 0
Asset-backed Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Available-for-sale Securities, Debt Securities |  | 2,462 | 2,350
Asset-backed Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Available-for-sale Securities, Debt Securities |  | 37 | 122
Collateralized Debt Obligations [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Available-for-sale Securities, Debt Securities |  | 3,038 | 2,841
Collateralized Debt Obligations [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Available-for-sale Securities, Debt Securities |  | 0 | 0
Collateralized Debt Obligations [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Available-for-sale Securities, Debt Securities |  | 2,497 | 2,218
Collateralized Debt Obligations [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Available-for-sale Securities, Debt Securities |  | 541 | 623
Commercial Mortgage Backed Securities [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Available-for-sale Securities, Debt Securities |  | 4,717 | 4,415
Commercial Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Available-for-sale Securities, Debt Securities |  | 0 | 0
Commercial Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Available-for-sale Securities, Debt Securities |  | 4,567 | 4,131
Commercial Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Available-for-sale Securities, Debt Securities |  | 150 | 284
Commercial Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Available-for-sale Securities, Debt Securities |  | 122 | 284
Corporate Debt Securities [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Available-for-sale Securities, Debt Securities |  | 26,802 | 27,359
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Available-for-sale Securities, Debt Securities |  | 0 | 0
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Available-for-sale Securities, Debt Securities |  | 25,948 | 26,319
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Available-for-sale Securities, Debt Securities |  | 854 | 1,040
Foreign Government Debt Securities [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Available-for-sale Securities, Debt Securities |  | 1,308 | 1,636
Foreign Government Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Available-for-sale Securities, Debt Securities |  | 0 | 0
Foreign Government Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Available-for-sale Securities, Debt Securities |  | 1,248 | 1,577
Foreign Government Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Available-for-sale Securities, Debt Securities |  | 60 | 59
US States and Political Subdivisions Debt Securities [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Available-for-sale Securities, Debt Securities |  | 12,121 | 12,871
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Available-for-sale Securities, Debt Securities |  | 0 | 0
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Available-for-sale Securities, Debt Securities |  | 12,072 | 12,805
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Available-for-sale Securities, Debt Securities |  | 49 | 66
Residential Mortgage Backed Securities [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Available-for-sale Securities, Debt Securities |  | 4,046 | 3,918
Residential Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Available-for-sale Securities, Debt Securities |  | 0 | 0
Residential Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Available-for-sale Securities, Debt Securities |  | 2,424 | 2,637
Residential Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Available-for-sale Securities, Debt Securities |  | 1,622 | 1,281
Residential Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Available-for-sale Securities, Debt Securities |  | 1,622 | 1,281
US Treasury Securities [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Available-for-sale Securities, Debt Securities |  | 4,665 | 3,872
US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Available-for-sale Securities, Debt Securities |  | 740 | 106
US Treasury Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Available-for-sale Securities, Debt Securities |  | 3,925 | 3,766
US Treasury Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Available-for-sale Securities, Debt Securities |  | 0 | 0
Other Policyholder Funds and Benefits Payable [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | (288) |
Other Policyholder Funds and Benefits Payable [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 |
Other Policyholder Funds and Benefits Payable [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 |
Other Policyholder Funds and Benefits Payable [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | (288) |
Other Policyholder Funds and Benefits Payable [Member] | Fair Value, Measurements, Recurring [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  | (165)
Other Policyholder Funds and Benefits Payable [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  | 0
Other Policyholder Funds and Benefits Payable [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  | 0
Other Policyholder Funds and Benefits Payable [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  | (165)
Credit Risk Contract [Member] | Other Investments [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 21 | 8
Credit Risk Contract [Member] | Other Investments [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 | 0
Credit Risk Contract [Member] | Other Investments [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 21 | 10
Credit Risk Contract [Member] | Other Investments [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 | (2)
Credit Risk Contract [Member] | Other Liabilities [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | (16) |
Credit Risk Contract [Member] | Other Liabilities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 |
Credit Risk Contract [Member] | Other Liabilities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | (16) |
Credit Risk Contract [Member] | Other Liabilities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 |
Credit Risk Contract [Member] | Other Liabilities [Member] | Fair Value, Measurements, Recurring [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  | (16)
Credit Risk Contract [Member] | Other Liabilities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  | 0
Credit Risk Contract [Member] | Other Liabilities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  | (9)
Credit Risk Contract [Member] | Other Liabilities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  | (7)
Equity Contract [Member] | Other Investments [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  | 3
Equity Contract [Member] | Other Investments [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  | 0
Equity Contract [Member] | Other Investments [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  | 0
Equity Contract [Member] | Other Investments [Member] | Fair Value, Inputs, Level 3 [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 |  | 41 |
Equity Contract [Member] | Other Liabilities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 |
Equity Contract [Member] | Other Liabilities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 41 |
Equity Contract [Member] | Other Liabilities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 |
Equity Contract [Member] | Other Liabilities [Member] | Fair Value, Measurements, Recurring [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  | 28
Equity Contract [Member] | Other Liabilities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  | 0
Equity Contract [Member] | Other Liabilities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  | 25
Equity Contract [Member] | Other Liabilities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  | 3
Foreign Exchange Contract [Member] | Other Investments [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 15 |
Foreign Exchange Contract [Member] | Other Investments [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 |
Foreign Exchange Contract [Member] | Other Investments [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 15 |
Foreign Exchange Contract [Member] | Other Investments [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 |
Foreign Exchange Contract [Member] | Other Liabilities [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | (374) |
Foreign Exchange Contract [Member] | Other Liabilities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 |
Foreign Exchange Contract [Member] | Other Liabilities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | (374) |
Foreign Exchange Contract [Member] | Other Liabilities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 |
Foreign Exchange Contract [Member] | Other Liabilities [Member] | Fair Value, Measurements, Recurring [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  | (445)
Foreign Exchange Contract [Member] | Other Liabilities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  | 0
Foreign Exchange Contract [Member] | Other Liabilities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  | (445)
Foreign Exchange Contract [Member] | Other Liabilities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  | 0
Interest Rate Contract [Member] | Other Investments [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | (227) | 129
Interest Rate Contract [Member] | Other Investments [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 | 0
Interest Rate Contract [Member] | Other Investments [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | (227) | 113
Interest Rate Contract [Member] | Other Investments [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 | 16
Interest Rate Contract [Member] | Other Liabilities [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | (569) |
Interest Rate Contract [Member] | Other Liabilities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 |
Interest Rate Contract [Member] | Other Liabilities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | (547) |
Interest Rate Contract [Member] | Other Liabilities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | (22) |
Interest Rate Contract [Member] | Other Liabilities [Member] | Fair Value, Measurements, Recurring [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  | (597)
Interest Rate Contract [Member] | Other Liabilities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  | 0
Interest Rate Contract [Member] | Other Liabilities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  | (574)
Interest Rate Contract [Member] | Other Liabilities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  | (23)
Other Contract [Member] | Other Investments [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 7 | 12
Other Contract [Member] | Other Investments [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 | 0
Other Contract [Member] | Other Investments [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 | 0
Other Contract [Member] | Other Investments [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 7 | 12
Derivative Financial Instruments, Assets [Member] | Other Investments [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net | [2] | 1 | 364
Derivative Financial Instruments, Assets [Member] | Other Investments [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net | [2] | (164) | 128
Derivative Financial Instruments, Assets [Member] | Other Investments [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net | [2] | 165 | 236
Derivative Financial Instruments, Liabilities [Member] |  |  |
Liabilities, Fair Value Disclosure [Abstract] |  |  |
Derivative Liability, Fair Value, Amount Offset Against Collateral |  | 283 | 413
Derivative Financial Instruments, Liabilities [Member] | Other Liabilities [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net | [3] | (798) | (927)
Derivative Financial Instruments, Liabilities [Member] | Other Liabilities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net | [3] | 0 | 0
Derivative Financial Instruments, Liabilities [Member] | Other Liabilities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net | [3] | (900) | (1,004)
Derivative Financial Instruments, Liabilities [Member] | Other Liabilities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net | [3] | 102 | 77
Embedded Derivative Financial Instruments [Member] | Other Liabilities [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net | [4] |  | (3)
Embedded Derivative Financial Instruments [Member] | Other Liabilities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net | [4] |  | 0
Embedded Derivative Financial Instruments [Member] | Other Liabilities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net | [4] |  | 0
Embedded Derivative Financial Instruments [Member] | Other Liabilities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net | [4] |  | (3)
US GMWB Hedging Instruments [Member] | Other Contract [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 131 | 124
GMWB Reinsurance [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Reinsurance Recoverables |  | 83 | 56
GMWB Reinsurance [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Reinsurance Recoverables |  | 0 | 0
GMWB Reinsurance [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Reinsurance Recoverables |  | 0 | 0
GMWB Reinsurance [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Reinsurance Recoverables |  |  | 56
Coinsurance and Modified Coinsurance Reinsurance Contracts [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Reinsurance Recoverables |  | 79 | 34
Coinsurance and Modified Coinsurance Reinsurance Contracts [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Reinsurance Recoverables |  | 0 | 0
Coinsurance and Modified Coinsurance Reinsurance Contracts [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Reinsurance Recoverables |  | 79 | 34
Coinsurance and Modified Coinsurance Reinsurance Contracts [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Reinsurance Recoverables |  | 0 | 0
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] | Other Policyholder Funds and Benefits Payable [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 |
Equity Linked Notes [Member] | Other Policyholder Funds and Benefits Payable [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 |
Equity Linked Notes [Member] | Other Policyholder Funds and Benefits Payable [Member] | Fair Value, Measurements, Recurring [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  | (26)
Equity Linked Notes [Member] | Other Policyholder Funds and Benefits Payable [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  | 0
Equity Linked Notes [Member] | Other Policyholder Funds and Benefits Payable [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  | 0
Equity Linked Notes [Member] | Other Policyholder Funds and Benefits Payable [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  | (26)
UNITED STATES | US GMWB Hedging Instruments [Member] | Other Investments [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 111 | 119
UNITED STATES | US GMWB Hedging Instruments [Member] | Other Investments [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 | 0
UNITED STATES | US GMWB Hedging Instruments [Member] | Other Investments [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 27 | 5
UNITED STATES | US GMWB Hedging Instruments [Member] | Other Investments [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 84 | 114
UNITED STATES | US GMWB Hedging Instruments [Member] | Other Liabilities [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 47 | 55
UNITED STATES | US GMWB Hedging Instruments [Member] | Other Liabilities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 | 0
UNITED STATES | US GMWB Hedging Instruments [Member] | Other Liabilities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | (4) | (1)
UNITED STATES | US GMWB Hedging Instruments [Member] | Other Liabilities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 51 | 56
UNITED STATES | Macro Hedge Program [Member] | Other Investments [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 74 | 93
UNITED STATES | Macro Hedge Program [Member] | Other Investments [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 | 0
UNITED STATES | Macro Hedge Program [Member] | Other Investments [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 | 0
UNITED STATES | Macro Hedge Program [Member] | Other Investments [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 74 | 93
UNITED STATES | Macro Hedge Program [Member] | Other Liabilities [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 73 | 48
UNITED STATES | Macro Hedge Program [Member] | Other Liabilities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 | 0
UNITED STATES | Macro Hedge Program [Member] | Other Liabilities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 | 0
UNITED STATES | Macro Hedge Program [Member] | Other Liabilities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 73 | 48
Portion at Other than Fair Value Measurement [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Separate Account Assets |  | 1,800 | 2,500
Portion at Fair Value Measurement [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Alternative Investments, Fair Value Disclosure | [5] | 622 | 770
Separate Account Assets | [6] | 118,174 | 132,211
Portion at Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Alternative Investments, Fair Value Disclosure | [5] | 0 | 0
Separate Account Assets | [6] | 78,110 | 91,537
Portion at Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Alternative Investments, Fair Value Disclosure | [5] | 548 | 581
Separate Account Assets | [6] | 39,559 | 40,096
Portion at Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Alternative Investments, Fair Value Disclosure | [5] | 74 | 189
Separate Account Assets | [6] | 505 | 578
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 |  | (262) |
Guaranteed Minimum Withdrawal Benefit [Member] | UNITED STATES | Other Policyholder Funds and Benefits Payable [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 |
Guaranteed Minimum Withdrawal Benefit [Member] | UNITED STATES | Other Policyholder Funds and Benefits Payable [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | 0 |
Guaranteed Minimum Withdrawal Benefit [Member] | UNITED STATES | Other Policyholder Funds and Benefits Payable [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | $ (262) |
Guaranteed Minimum Withdrawal Benefit [Member] | UNITED STATES | Other Policyholder Funds and Benefits Payable [Member] | Fair Value, Measurements, Recurring [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  | (139)
Guaranteed Minimum Withdrawal Benefit [Member] | UNITED STATES | Other Policyholder Funds and Benefits Payable [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  | 0
Guaranteed Minimum Withdrawal Benefit [Member] | UNITED STATES | Other Policyholder Funds and Benefits Payable [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  | 0
Guaranteed Minimum Withdrawal Benefit [Member] | UNITED STATES | Other Policyholder Funds and Benefits Payable [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  |  | $ (139)
[1] | [1]Included in other investments on the Consolidated Balance Sheets.
[2] | [2]Includes 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 December 31, 2015 and 2014, $283 and $413, respectively, of cash collateral liability was netted against the derivative asset value in the Consolidated Balance Sheets and is excluded from the preceding table. See footnote 5 for derivative liabilities.
[3] | [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.
[4] | [6]Represents embedded derivatives associated with non-funding agreement-backed consumer equity linked notes
[5] | Represents hedge funds where investment company accounting has been applied to a wholly-owned fund of funds measured at fair value.
[6] | [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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