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Fair Value Of Financial Instruments (Company's Assets And Liabilities Measured At Fair Value On Recurring Basis) (Detail) (USD $) In Millions, unless otherwise specified | Mar. 31, 2014 | Dec. 31, 2013
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Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | $ 10,218 | $ 10,786
Fair value financial liabilities measured on recurring basis | 2,871 | 3,781
Variable Interest Entity Primary Beneficiary [Member] | Loans Receivable [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 1,557 | 1,612
Variable Interest Entity Primary Beneficiary [Member] | Loan Repurchase Commitments [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 364 | 359
State and municipal bonds [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Corporate Obligations [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 88 | 89
Residential Mortgage Backed Agency [Member] | Mortgage-backed [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Residential Mortgage Backed Non Agency [Member] | Mortgage-backed [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 213 | 259
Commercial Mortgage Backed Securities [Member] | Mortgage-backed [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 97 | 105
Collateralized Debt Obligations [Member] | Asset-backed [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 28 | 36
Other Asset Backed [Member] | Asset-backed [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 78 | 98
Money Market Securities [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 579 | 783
Money Market Securities [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 35 | 136
Medium Term Notes [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 215 | 203
Perpetual Debt And Equity Securities [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 55 | 51
Cash And Cash Equivalents [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 679 | 1,161
Fixed Maturities [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 6,387 | 5,996
Fixed Maturities [Member] | U S Treasury And Government [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 571 | 553
Fixed Maturities [Member] | State and municipal bonds [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 1,883 | 1,784
Fixed Maturities [Member] | Foreign Government Debt [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 272 | 189
Fixed Maturities [Member] | Corporate Obligations [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 2,002 | 1,824
Fixed Maturities [Member] | Residential Mortgage Backed Agency [Member] | Mortgage-backed [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 1,154 | 1,173
Fixed Maturities [Member] | Residential Mortgage Backed Non Agency [Member] | Mortgage-backed [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 85 | 92
Fixed Maturities [Member] | Commercial Mortgage Backed Securities [Member] | Mortgage-backed [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 41 | 39
Fixed Maturities [Member] | Collateralized Debt Obligations [Member] | Asset-backed [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 154 | 154
Fixed Maturities [Member] | Other Asset Backed [Member] | Asset-backed [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 225 | 188
Derivative Assets [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 4 | 4
Derivative Assets [Member] | Credit Derivatives [Member] | Non Insured Derivatives [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Derivative Assets [Member] | Credit Derivatives [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Derivative Assets [Member] | Interest Rate Derivatives [Member] | Non Insured Derivatives [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 4 | 4
Derivative Assets [Member] | Interest Rate Derivatives [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Derivative Assets [Member] | Other Derivatives [Member] | Non Insured Derivatives [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Assets Of Consolidated V I Es [Member] | Cash And Cash Equivalents [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 54 | 97
Derivative Liabilities [Member] | Credit Derivatives [Member] | Insured Derivatives [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 313 | 1,152
Derivative Liabilities [Member] | Credit Derivatives [Member] | Non Insured Derivatives [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 0 |
Derivative Liabilities [Member] | Credit Derivatives [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 0 | 0
Derivative Liabilities [Member] | Interest Rate Derivatives [Member] | Non Insured Derivatives [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 37 | 0
Derivative Liabilities [Member] | Interest Rate Derivatives [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 0 | 0
Derivative Liabilities [Member] | Currency Derivatives [Member] | Non Insured Derivatives [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 0 | 0
Derivative Liabilities [Member] | Currency Derivatives [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 5 | 11
Derivative Liabilities [Member] | Other Derivatives [Member] | Non Insured Derivatives [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 31 | 0
Other Liabilities [Member] | Warrant [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 76 | 59
Variable Interest Entity Notes [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 2,194 | 2,356
Fair Value Inputs Level 1 [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 2,025 | 2,713
Fair value financial liabilities measured on recurring basis | 0 | 0
Fair Value Inputs Level 1 [Member] | Variable Interest Entity Primary Beneficiary [Member] | Loans Receivable [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Fair Value Inputs Level 1 [Member] | Variable Interest Entity Primary Beneficiary [Member] | Loan Repurchase Commitments [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Fair Value Inputs Level 1 [Member] | State and municipal bonds [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Fair Value Inputs Level 1 [Member] | Corporate Obligations [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Fair Value Inputs Level 1 [Member] | Residential Mortgage Backed Agency [Member] | Mortgage-backed [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Fair Value Inputs Level 1 [Member] | Residential Mortgage Backed Non Agency [Member] | Mortgage-backed [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Fair Value Inputs Level 1 [Member] | Commercial Mortgage Backed Securities [Member] | Mortgage-backed [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Fair Value Inputs Level 1 [Member] | Collateralized Debt Obligations [Member] | Asset-backed [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Fair Value Inputs Level 1 [Member] | Other Asset Backed [Member] | Asset-backed [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Fair Value Inputs Level 1 [Member] | Money Market Securities [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 579 | 783
Fair Value Inputs Level 1 [Member] | Money Market Securities [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 35 | 136
Fair Value Inputs Level 1 [Member] | Medium Term Notes [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 0 | 0
Fair Value Inputs Level 1 [Member] | Perpetual Debt And Equity Securities [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 29 | 27
Fair Value Inputs Level 1 [Member] | Cash And Cash Equivalents [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 679 | 1,161
Fair Value Inputs Level 1 [Member] | Fixed Maturities [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 649 | 509
Fair Value Inputs Level 1 [Member] | Fixed Maturities [Member] | U S Treasury And Government [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 462 | 397
Fair Value Inputs Level 1 [Member] | Fixed Maturities [Member] | State and municipal bonds [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Fair Value Inputs Level 1 [Member] | Fixed Maturities [Member] | Foreign Government Debt [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 187 | 112
Fair Value Inputs Level 1 [Member] | Fixed Maturities [Member] | Corporate Obligations [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Fair Value Inputs Level 1 [Member] | Fixed Maturities [Member] | Residential Mortgage Backed Agency [Member] | Mortgage-backed [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Fair Value Inputs Level 1 [Member] | Fixed Maturities [Member] | Residential Mortgage Backed Non Agency [Member] | Mortgage-backed [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Fair Value Inputs Level 1 [Member] | Fixed Maturities [Member] | Commercial Mortgage Backed Securities [Member] | Mortgage-backed [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Fair Value Inputs Level 1 [Member] | Fixed Maturities [Member] | Collateralized Debt Obligations [Member] | Asset-backed [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Fair Value Inputs Level 1 [Member] | Fixed Maturities [Member] | Other Asset Backed [Member] | Asset-backed [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Fair Value Inputs Level 1 [Member] | Derivative Assets [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Fair Value Inputs Level 1 [Member] | Derivative Assets [Member] | Credit Derivatives [Member] | Non Insured Derivatives [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Fair Value Inputs Level 1 [Member] | Derivative Assets [Member] | Credit Derivatives [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Fair Value Inputs Level 1 [Member] | Derivative Assets [Member] | Interest Rate Derivatives [Member] | Non Insured Derivatives [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Fair Value Inputs Level 1 [Member] | Derivative Assets [Member] | Interest Rate Derivatives [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Fair Value Inputs Level 1 [Member] | Derivative Assets [Member] | Other Derivatives [Member] | Non Insured Derivatives [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Fair Value Inputs Level 1 [Member] | Assets Of Consolidated V I Es [Member] | Cash And Cash Equivalents [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 54 | 97
Fair Value Inputs Level 1 [Member] | Derivative Liabilities [Member] | Credit Derivatives [Member] | Insured Derivatives [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 0 | 0
Fair Value Inputs Level 1 [Member] | Derivative Liabilities [Member] | Credit Derivatives [Member] | Non Insured Derivatives [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 0 |
Fair Value Inputs Level 1 [Member] | Derivative Liabilities [Member] | Credit Derivatives [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 0 | 0
Fair Value Inputs Level 1 [Member] | Derivative Liabilities [Member] | Interest Rate Derivatives [Member] | Non Insured Derivatives [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 0 | 0
Fair Value Inputs Level 1 [Member] | Derivative Liabilities [Member] | Interest Rate Derivatives [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 0 | 0
Fair Value Inputs Level 1 [Member] | Derivative Liabilities [Member] | Currency Derivatives [Member] | Non Insured Derivatives [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 0 | 0
Fair Value Inputs Level 1 [Member] | Derivative Liabilities [Member] | Currency Derivatives [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 0 | 0
Fair Value Inputs Level 1 [Member] | Derivative Liabilities [Member] | Other Derivatives [Member] | Non Insured Derivatives [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 0 | 0
Fair Value Inputs Level 1 [Member] | Other Liabilities [Member] | Warrant [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 0 | 0
Fair Value Inputs Level 1 [Member] | Variable Interest Entity Notes [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 0 | 0
Fair Value Inputs Level 2 [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 5,841 | 5,763
Fair value financial liabilities measured on recurring basis | 1,652 | 1,645
Fair Value Inputs Level 2 [Member] | Variable Interest Entity Primary Beneficiary [Member] | Loans Receivable [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Fair Value Inputs Level 2 [Member] | Variable Interest Entity Primary Beneficiary [Member] | Loan Repurchase Commitments [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Fair Value Inputs Level 2 [Member] | State and municipal bonds [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Fair Value Inputs Level 2 [Member] | Corporate Obligations [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 24 | 41
Fair Value Inputs Level 2 [Member] | Residential Mortgage Backed Agency [Member] | Mortgage-backed [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Fair Value Inputs Level 2 [Member] | Residential Mortgage Backed Non Agency [Member] | Mortgage-backed [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 208 | 255
Fair Value Inputs Level 2 [Member] | Commercial Mortgage Backed Securities [Member] | Mortgage-backed [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 94 | 102
Fair Value Inputs Level 2 [Member] | Collateralized Debt Obligations [Member] | Asset-backed [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 14 | 14
Fair Value Inputs Level 2 [Member] | Other Asset Backed [Member] | Asset-backed [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 36 | 44
Fair Value Inputs Level 2 [Member] | Money Market Securities [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Fair Value Inputs Level 2 [Member] | Money Market Securities [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Fair Value Inputs Level 2 [Member] | Medium Term Notes [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 0 | 0
Fair Value Inputs Level 2 [Member] | Perpetual Debt And Equity Securities [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 11 | 13
Fair Value Inputs Level 2 [Member] | Cash And Cash Equivalents [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Fair Value Inputs Level 2 [Member] | Fixed Maturities [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 5,396 | 5,248
Fair Value Inputs Level 2 [Member] | Fixed Maturities [Member] | U S Treasury And Government [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 109 | 156
Fair Value Inputs Level 2 [Member] | Fixed Maturities [Member] | State and municipal bonds [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 1,821 | 1,765
Fair Value Inputs Level 2 [Member] | Fixed Maturities [Member] | Foreign Government Debt [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 78 | 65
Fair Value Inputs Level 2 [Member] | Fixed Maturities [Member] | Corporate Obligations [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 1,972 | 1,776
Fair Value Inputs Level 2 [Member] | Fixed Maturities [Member] | Residential Mortgage Backed Agency [Member] | Mortgage-backed [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 1,125 | 1,173
Fair Value Inputs Level 2 [Member] | Fixed Maturities [Member] | Residential Mortgage Backed Non Agency [Member] | Mortgage-backed [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 85 | 86
Fair Value Inputs Level 2 [Member] | Fixed Maturities [Member] | Commercial Mortgage Backed Securities [Member] | Mortgage-backed [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 27 | 25
Fair Value Inputs Level 2 [Member] | Fixed Maturities [Member] | Collateralized Debt Obligations [Member] | Asset-backed [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 39 | 72
Fair Value Inputs Level 2 [Member] | Fixed Maturities [Member] | Other Asset Backed [Member] | Asset-backed [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 140 | 130
Fair Value Inputs Level 2 [Member] | Derivative Assets [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 58 | 46
Fair Value Inputs Level 2 [Member] | Derivative Assets [Member] | Credit Derivatives [Member] | Non Insured Derivatives [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Fair Value Inputs Level 2 [Member] | Derivative Assets [Member] | Credit Derivatives [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Fair Value Inputs Level 2 [Member] | Derivative Assets [Member] | Interest Rate Derivatives [Member] | Non Insured Derivatives [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 58 | 46
Fair Value Inputs Level 2 [Member] | Derivative Assets [Member] | Interest Rate Derivatives [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Fair Value Inputs Level 2 [Member] | Derivative Assets [Member] | Other Derivatives [Member] | Non Insured Derivatives [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Fair Value Inputs Level 2 [Member] | Assets Of Consolidated V I Es [Member] | Cash And Cash Equivalents [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Fair Value Inputs Level 2 [Member] | Derivative Liabilities [Member] | Credit Derivatives [Member] | Insured Derivatives [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 4 | 5
Fair Value Inputs Level 2 [Member] | Derivative Liabilities [Member] | Credit Derivatives [Member] | Non Insured Derivatives [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 0 |
Fair Value Inputs Level 2 [Member] | Derivative Liabilities [Member] | Credit Derivatives [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 0 | 0
Fair Value Inputs Level 2 [Member] | Derivative Liabilities [Member] | Interest Rate Derivatives [Member] | Non Insured Derivatives [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 190 | 165
Fair Value Inputs Level 2 [Member] | Derivative Liabilities [Member] | Interest Rate Derivatives [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 0 | 0
Fair Value Inputs Level 2 [Member] | Derivative Liabilities [Member] | Currency Derivatives [Member] | Non Insured Derivatives [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 0 | 0
Fair Value Inputs Level 2 [Member] | Derivative Liabilities [Member] | Currency Derivatives [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 0 | 0
Fair Value Inputs Level 2 [Member] | Derivative Liabilities [Member] | Other Derivatives [Member] | Non Insured Derivatives [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 0 | 0
Fair Value Inputs Level 2 [Member] | Other Liabilities [Member] | Warrant [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 76 | 59
Fair Value Inputs Level 2 [Member] | Variable Interest Entity Notes [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 1,382 | 1,416
Fair Value Inputs Level 3 [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 2,406 | 2,352
Fair value financial liabilities measured on recurring basis | 1,372 | 2,301
Fair Value Inputs Level 3 [Member] | Variable Interest Entity Primary Beneficiary [Member] | Loans Receivable [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 1,557 | 1,612
Fair Value Inputs Level 3 [Member] | Variable Interest Entity Primary Beneficiary [Member] | Loan Repurchase Commitments [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 364 | 359
Fair Value Inputs Level 3 [Member] | State and municipal bonds [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Fair Value Inputs Level 3 [Member] | Corporate Obligations [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 64 | 48
Fair Value Inputs Level 3 [Member] | Residential Mortgage Backed Agency [Member] | Mortgage-backed [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Fair Value Inputs Level 3 [Member] | Residential Mortgage Backed Non Agency [Member] | Mortgage-backed [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 5 | 4
Fair Value Inputs Level 3 [Member] | Commercial Mortgage Backed Securities [Member] | Mortgage-backed [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 3 | 3
Fair Value Inputs Level 3 [Member] | Collateralized Debt Obligations [Member] | Asset-backed [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 14 | 22
Fair Value Inputs Level 3 [Member] | Other Asset Backed [Member] | Asset-backed [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 42 | 54
Fair Value Inputs Level 3 [Member] | Money Market Securities [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Fair Value Inputs Level 3 [Member] | Money Market Securities [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Fair Value Inputs Level 3 [Member] | Medium Term Notes [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 215 | 203
Fair Value Inputs Level 3 [Member] | Perpetual Debt And Equity Securities [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 15 | 11
Fair Value Inputs Level 3 [Member] | Cash And Cash Equivalents [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Fair Value Inputs Level 3 [Member] | Fixed Maturities [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 342 | 239
Fair Value Inputs Level 3 [Member] | Fixed Maturities [Member] | U S Treasury And Government [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Fair Value Inputs Level 3 [Member] | Fixed Maturities [Member] | State and municipal bonds [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 62 | 19
Fair Value Inputs Level 3 [Member] | Fixed Maturities [Member] | Foreign Government Debt [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 7 | 12
Fair Value Inputs Level 3 [Member] | Fixed Maturities [Member] | Corporate Obligations [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 30 | 48
Fair Value Inputs Level 3 [Member] | Fixed Maturities [Member] | Residential Mortgage Backed Agency [Member] | Mortgage-backed [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 29 | 0
Fair Value Inputs Level 3 [Member] | Fixed Maturities [Member] | Residential Mortgage Backed Non Agency [Member] | Mortgage-backed [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 6
Fair Value Inputs Level 3 [Member] | Fixed Maturities [Member] | Commercial Mortgage Backed Securities [Member] | Mortgage-backed [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 14 | 14
Fair Value Inputs Level 3 [Member] | Fixed Maturities [Member] | Collateralized Debt Obligations [Member] | Asset-backed [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 115 | 82
Fair Value Inputs Level 3 [Member] | Fixed Maturities [Member] | Other Asset Backed [Member] | Asset-backed [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 85 | 58
Fair Value Inputs Level 3 [Member] | Derivative Assets [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Fair Value Inputs Level 3 [Member] | Derivative Assets [Member] | Credit Derivatives [Member] | Non Insured Derivatives [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Fair Value Inputs Level 3 [Member] | Derivative Assets [Member] | Credit Derivatives [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Fair Value Inputs Level 3 [Member] | Derivative Assets [Member] | Interest Rate Derivatives [Member] | Non Insured Derivatives [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Fair Value Inputs Level 3 [Member] | Derivative Assets [Member] | Interest Rate Derivatives [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Fair Value Inputs Level 3 [Member] | Derivative Assets [Member] | Other Derivatives [Member] | Non Insured Derivatives [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Fair Value Inputs Level 3 [Member] | Assets Of Consolidated V I Es [Member] | Cash And Cash Equivalents [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Fair Value Inputs Level 3 [Member] | Derivative Liabilities [Member] | Credit Derivatives [Member] | Insured Derivatives [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 309 | 1,147
Fair Value Inputs Level 3 [Member] | Derivative Liabilities [Member] | Credit Derivatives [Member] | Non Insured Derivatives [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 0 |
Fair Value Inputs Level 3 [Member] | Derivative Liabilities [Member] | Credit Derivatives [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 0 | 0
Fair Value Inputs Level 3 [Member] | Derivative Liabilities [Member] | Interest Rate Derivatives [Member] | Non Insured Derivatives [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 0 | 0
Fair Value Inputs Level 3 [Member] | Derivative Liabilities [Member] | Interest Rate Derivatives [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 0 | 0
Fair Value Inputs Level 3 [Member] | Derivative Liabilities [Member] | Currency Derivatives [Member] | Non Insured Derivatives [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 0 | 0
Fair Value Inputs Level 3 [Member] | Derivative Liabilities [Member] | Currency Derivatives [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 5 | 11
Fair Value Inputs Level 3 [Member] | Derivative Liabilities [Member] | Other Derivatives [Member] | Non Insured Derivatives [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 31 | 0
Fair Value Inputs Level 3 [Member] | Other Liabilities [Member] | Warrant [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 0 | 0
Fair Value Inputs Level 3 [Member] | Variable Interest Entity Notes [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 812 | 940
Counterparty And Cash Collateral Netting [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | (54) | (42)
Fair value financial liabilities measured on recurring basis | (153) | (165)
Counterparty And Cash Collateral Netting [Member] | Variable Interest Entity Primary Beneficiary [Member] | Loans Receivable [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Counterparty And Cash Collateral Netting [Member] | Variable Interest Entity Primary Beneficiary [Member] | Loan Repurchase Commitments [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Counterparty And Cash Collateral Netting [Member] | State and municipal bonds [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Counterparty And Cash Collateral Netting [Member] | Corporate Obligations [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Counterparty And Cash Collateral Netting [Member] | Residential Mortgage Backed Agency [Member] | Mortgage-backed [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Counterparty And Cash Collateral Netting [Member] | Residential Mortgage Backed Non Agency [Member] | Mortgage-backed [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Counterparty And Cash Collateral Netting [Member] | Commercial Mortgage Backed Securities [Member] | Mortgage-backed [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Counterparty And Cash Collateral Netting [Member] | Collateralized Debt Obligations [Member] | Asset-backed [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Counterparty And Cash Collateral Netting [Member] | Other Asset Backed [Member] | Asset-backed [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Counterparty And Cash Collateral Netting [Member] | Money Market Securities [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Counterparty And Cash Collateral Netting [Member] | Money Market Securities [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Counterparty And Cash Collateral Netting [Member] | Medium Term Notes [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 0 | 0
Counterparty And Cash Collateral Netting [Member] | Perpetual Debt And Equity Securities [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Counterparty And Cash Collateral Netting [Member] | Cash And Cash Equivalents [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Counterparty And Cash Collateral Netting [Member] | Fixed Maturities [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Counterparty And Cash Collateral Netting [Member] | Fixed Maturities [Member] | U S Treasury And Government [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Counterparty And Cash Collateral Netting [Member] | Fixed Maturities [Member] | State and municipal bonds [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Counterparty And Cash Collateral Netting [Member] | Fixed Maturities [Member] | Foreign Government Debt [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Counterparty And Cash Collateral Netting [Member] | Fixed Maturities [Member] | Corporate Obligations [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Counterparty And Cash Collateral Netting [Member] | Fixed Maturities [Member] | Residential Mortgage Backed Agency [Member] | Mortgage-backed [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Counterparty And Cash Collateral Netting [Member] | Fixed Maturities [Member] | Residential Mortgage Backed Non Agency [Member] | Mortgage-backed [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Counterparty And Cash Collateral Netting [Member] | Fixed Maturities [Member] | Commercial Mortgage Backed Securities [Member] | Mortgage-backed [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Counterparty And Cash Collateral Netting [Member] | Fixed Maturities [Member] | Collateralized Debt Obligations [Member] | Asset-backed [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Counterparty And Cash Collateral Netting [Member] | Fixed Maturities [Member] | Other Asset Backed [Member] | Asset-backed [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Counterparty And Cash Collateral Netting [Member] | Derivative Assets [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | (54) | (42)
Counterparty And Cash Collateral Netting [Member] | Derivative Assets [Member] | Credit Derivatives [Member] | Non Insured Derivatives [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Counterparty And Cash Collateral Netting [Member] | Derivative Assets [Member] | Credit Derivatives [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Counterparty And Cash Collateral Netting [Member] | Derivative Assets [Member] | Interest Rate Derivatives [Member] | Non Insured Derivatives [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | (54) | (42)
Counterparty And Cash Collateral Netting [Member] | Derivative Assets [Member] | Interest Rate Derivatives [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Counterparty And Cash Collateral Netting [Member] | Derivative Assets [Member] | Other Derivatives [Member] | Non Insured Derivatives [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Counterparty And Cash Collateral Netting [Member] | Assets Of Consolidated V I Es [Member] | Cash And Cash Equivalents [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial assets measured on recurring basis | 0 | 0
Counterparty And Cash Collateral Netting [Member] | Derivative Liabilities [Member] | Credit Derivatives [Member] | Insured Derivatives [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 0 | 0
Counterparty And Cash Collateral Netting [Member] | Derivative Liabilities [Member] | Credit Derivatives [Member] | Non Insured Derivatives [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 0 |
Counterparty And Cash Collateral Netting [Member] | Derivative Liabilities [Member] | Credit Derivatives [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 0 | 0
Counterparty And Cash Collateral Netting [Member] | Derivative Liabilities [Member] | Interest Rate Derivatives [Member] | Non Insured Derivatives [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | (153) | (165)
Counterparty And Cash Collateral Netting [Member] | Derivative Liabilities [Member] | Interest Rate Derivatives [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 0 | 0
Counterparty And Cash Collateral Netting [Member] | Derivative Liabilities [Member] | Currency Derivatives [Member] | Non Insured Derivatives [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 0 | 0
Counterparty And Cash Collateral Netting [Member] | Derivative Liabilities [Member] | Currency Derivatives [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 0 | 0
Counterparty And Cash Collateral Netting [Member] | Derivative Liabilities [Member] | Other Derivatives [Member] | Non Insured Derivatives [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 0 | 0
Counterparty And Cash Collateral Netting [Member] | Other Liabilities [Member] | Warrant [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | 0 | 0
Counterparty And Cash Collateral Netting [Member] | Variable Interest Entity Notes [Member] | Variable Interest Entity Primary Beneficiary [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Fair value financial liabilities measured on recurring basis | $ 0 | $ 0

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