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Fair Value Measurements Level 4 Fair Value by Hierarchy (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Fair Value Measurement [Domain] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Alternative Investments, Fair Value Disclosure | $ 0 | $ 622 |
Separate Account Assets | 111,634 | 118,174 |
Fair Value Measurement [Domain] | Fair Value, Inputs, Level 1 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Alternative Investments, Fair Value Disclosure | 0 | 0 |
Separate Account Assets | 71,606 | 78,110 |
Fair Value Measurement [Domain] | Fair Value, Inputs, Level 2 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Alternative Investments, Fair Value Disclosure | 0 | 0 |
Separate Account Assets | 38,856 | 38,700 |
Fair Value Measurement [Domain] | Fair Value, Inputs, Level 3 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Alternative Investments, Fair Value Disclosure | 0 | 0 |
Separate Account Assets | 201 | 140 |
Available-for-sale Securities, Debt Securities | 56,003 | 59,196 |
Marketable Securities, Fixed Maturities | 293 | 503 |
Trading Securities, Equity | 11 | 11 |
Available-for-sale Securities, Equity Securities | 1,097 | 1,121 |
Other Short-term Investments | 3,244 | 1,843 |
Alternative Investments, Fair Value Disclosure | 2,456 | 2,874 |
Reinsurance Recoverables, Including Reinsurance Premium Paid | 23,311 | 23,189 |
Separate Account Assets | 115,665 | 120,123 |
Assets, Fair Value Disclosure | 172,243 | 181,633 |
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value | 299 | 288 | $ 168
Liabilities, Fair Value Disclosure [Abstract] |  |  |
Financial and Nonfinancial Liabilities, Fair Value Disclosure | (988) | (1,086) |
Derivative Liability, Fair Value, Amount Offset Against Collateral | 56 | 23 |
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 | 620 | 740 |
Assets, Fair Value Disclosure [Abstract] |  |  |
Marketable Securities, Fixed Maturities | 1 | 2 |
Trading Securities, Equity | 11 | 11 |
Available-for-sale Securities, Equity Securities | 821 | 874 |
Other Short-term Investments | 878 | 333 |
Assets, Fair Value Disclosure | 73,937 | 80,070 |
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 | 51,573 | 55,143 |
Assets, Fair Value Disclosure [Abstract] |  |  |
Marketable Securities, Fixed Maturities | 281 | 485 |
Trading Securities, Equity | 0 | 0 |
Available-for-sale Securities, Equity Securities | 177 | 154 |
Other Short-term Investments | 2,366 | 1,510 |
Assets, Fair Value Disclosure | 92,960 | 95,907 |
Liabilities, Fair Value Disclosure [Abstract] |  |  |
Financial and Nonfinancial Liabilities, Fair Value Disclosure | (736) | (900) |
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 | 3,810 | 3,313 |
Assets, Fair Value Disclosure [Abstract] |  |  |
Marketable Securities, Fixed Maturities | 11 | 16 |
Trading Securities, Equity | 0 | 0 |
Available-for-sale Securities, Equity Securities | 99 | 93 |
Other Short-term Investments | 0 | 0 |
Assets, Fair Value Disclosure | 4,375 | 3,810 |
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value | 274 | (288) |
Liabilities, Fair Value Disclosure [Abstract] |  |  |
Financial and Nonfinancial Liabilities, Fair Value Disclosure | (252) | (186) |
Asset-backed Securities [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Available-for-sale Securities, Debt Securities | 2,382 | 2,499 |
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 | 2,300 | 2,462 |
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 | 82 | 37 |
Collateralized Debt Obligations [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Available-for-sale Securities, Debt Securities | 1,916 | 3,038 |
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 | 1,502 | 2,497 |
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 | 414 | 541 |
Commercial Mortgage Backed Securities [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Available-for-sale Securities, Debt Securities | 4,936 | 4,717 |
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 | 4,856 | 4,567 |
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 | 80 | 150 |
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 | 52 | 122 |
Corporate Debt Securities [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Available-for-sale Securities, Debt Securities | 25,666 | 26,802 |
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 | 24,586 | 25,948 |
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 | 1,080 | 854 |
Foreign Government Debt Securities [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Available-for-sale Securities, Debt Securities | 1,171 | 1,308 |
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 | 1,107 | 1,248 |
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 | 64 | 60 |
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 | 11,486 | 12,121 |
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 | 11,368 | 12,072 |
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 | 118 | 49 |
Residential Mortgage Backed Securities [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Available-for-sale Securities, Debt Securities | 4,767 | 4,046 |
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 | 2,795 | 2,424 |
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 | 1,972 | 1,622 |
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 | 1,963 | 1,622 |
US Treasury Securities [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Available-for-sale Securities, Debt Securities | 3,679 | 4,665 |
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 | 620 | 740 |
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 | 3,059 | 3,925 |
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] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value |  | 288 | 165
US GMWB Hedging Instruments [Member] | Other Investments [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net | 74 | 111 |
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 |
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 | 14 | 27 |
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 | 60 | 84 |
US GMWB Hedging Instruments [Member] | Other Liabilities [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net | 20 | 47 |
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 |
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 | (1) | (4) |
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 | 21 | 51 |
Macro Hedge Program [Member] | Other Investments [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net | 128 | 74 |
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 |
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 | 8 | 0 |
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 | 120 | 74 |
Macro Hedge Program [Member] | Other Liabilities [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net | 50 | 73 |
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 |
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 | 3 | 0 |
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 | 47 | 73 |
GMWB Reinsurance [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Reinsurance Recoverables, Including Reinsurance Premium Paid | 73 | 83 |
GMWB Reinsurance [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Reinsurance Recoverables, Including Reinsurance Premium Paid | 0 | 0 |
GMWB Reinsurance [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Reinsurance Recoverables, Including Reinsurance Premium Paid | 0 | 0 |
GMWB Reinsurance [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Reinsurance Recoverables, Including Reinsurance Premium Paid |  | 83 |
Coinsurance and Modified Coinsurance Reinsurance Contracts [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Reinsurance Recoverables, Including Reinsurance Premium Paid | 68 | 79 |
Coinsurance and Modified Coinsurance Reinsurance Contracts [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Reinsurance Recoverables, Including Reinsurance Premium Paid | 0 | 0 |
Coinsurance and Modified Coinsurance Reinsurance Contracts [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Reinsurance Recoverables, Including Reinsurance Premium Paid | 68 | 79 |
Coinsurance and Modified Coinsurance Reinsurance Contracts [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Reinsurance Recoverables, Including Reinsurance Premium Paid | 0 | 0 |
Credit Risk Contract [Member] | Other Investments [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net | 17 | 21 |
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 | 17 | 21 |
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 | 0 |
Credit Risk Contract [Member] | Other Liabilities [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net | (13) |  |
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 | (13) |  |
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 |  | (16) |
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 |  | 0 |
Equity Contract [Member] | Other Liabilities [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net | 33 |  |
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 | 33 |  |
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 |  | 41 |
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 |  | 41 |
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 |  | 0 |
Foreign Exchange Contract [Member] | Other Investments [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net | 27 | 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 | 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 | 27 | 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 | 0 |
Foreign Exchange Contract [Member] | Other Liabilities [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net | (237) |  |
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 | (237) |  |
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 |  | (374) |
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 |  | (374) |
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 | (427) | (227) |
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 | (427) | (227) |
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 | 0 |
Interest Rate Contract [Member] | Other Liabilities [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net | (542) |  |
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 | (521) |  |
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 | (21) |  |
Interest Rate Contract [Member] | Other Liabilities [Member] | Fair Value, Measurements, Recurring [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | (569) |
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 |  | (547) |
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 |  | (22) |
Other Contract [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net | 100 | 131 |
Other Contract [Member] | Other Investments [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net | 1 | 7 |
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 | 1 | 7 |
Derivative Financial Instruments, Assets [Member] | Other Investments [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net | (180) | 1 |
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 | (361) | (164) |
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 | 181 | 165 |
Derivative Financial Instruments, Liabilities [Member] | Other Liabilities [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net | (689) | (798) |
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 | 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 | (736) | (900) |
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 | 47 | 102 |
Embedded Derivative Financial Instruments [Member] | Other Liabilities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value |  | 0 | 3
Portion at Other than Fair Value Measurement [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
HIG_FairValueAssetLevel1toLevel2Transfers | 1,700 | 1,900 |
Assets, Fair Value Disclosure [Abstract] |  |  |
Separate Account Assets | 4,000 | 1,800 |
Guaranteed Minimum Withdrawal Benefit [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Obligations, Fair Value Disclosure | (241) | (262) |
Guaranteed Minimum Withdrawal Benefit [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Obligations, Fair Value Disclosure | 0 | 0 |
Guaranteed Minimum Withdrawal Benefit [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Obligations, Fair Value Disclosure | 0 | 0 |
Guaranteed Minimum Withdrawal Benefit [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Obligations, Fair Value Disclosure |  | (262) |
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value |  | 262 |
Guaranteed Minimum Withdrawal Benefit [Member] | Other Policyholder Funds and Benefits Payable [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value | 241 | 262 | 139
Liability [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Obligations, Fair Value Disclosure | (274) | (288) |
Liability [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Obligations, Fair Value Disclosure | 0 | 0 |
Liability [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Obligations, Fair Value Disclosure | 0 | 0 |
Liability [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Obligations, Fair Value Disclosure | (274) | (288) |
Equity Linked Notes [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Obligations, Fair Value Disclosure | (33) | (26) |
Equity Linked Notes [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Obligations, Fair Value Disclosure | 0 | 0 |
Equity Linked Notes [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Obligations, Fair Value Disclosure | 0 | 0 |
Equity Linked Notes [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Obligations, Fair Value Disclosure |  | (26) |
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value | 33 | 26 |
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] |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value |  | 26 | $ 26
Obligations [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value | (25) | $ 0 |
Obligations [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Obligations, Fair Value Disclosure | (25) |  |
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value | $ (25) |  |
Hedge Funds [Member] | Separate Accounts [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Redemption Restriction, Percentage | 39.00% | 30.00% |
Private Equity Funds [Member] | Separate Accounts [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Redemption Restriction, Percentage | 11.00% | 2.00% |

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