v3.8.0.1

Investments Investments (Restricted Assets and Special Deposits) (Details) - USD ($) $ in Millions | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Financial Instruments Owned and Pledged as Collateral [Line Items] |  |
Financial Instruments Owned and Pledged as Collateral | $ 16,254 | $ 16,402
Securities Sold under Agreements to Repurchase |  |
Financial Instruments Owned and Pledged as Collateral [Line Items] |  |
Financial Instruments Owned and Pledged as Collateral | 8,400 | 7,606
Cash Collateral For Loaned Securities |  |
Financial Instruments Owned and Pledged as Collateral [Line Items] |  |
Financial Instruments Owned and Pledged as Collateral | 4,354 | 4,333
Separate Account Liabilities |  |
Financial Instruments Owned and Pledged as Collateral [Line Items] |  |
Financial Instruments Owned and Pledged as Collateral | 3,064 | 3,462
Policyholders' Account Balances |  |
Financial Instruments Owned and Pledged as Collateral [Line Items] |  |
Financial Instruments Owned and Pledged as Collateral | $ 436 | $ 1,001

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- Definition Financial Instruments Owned and Pledged As Collateral Associated Liabilities + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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