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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, 2013
Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis $ 11,979 $ 12,174
Fair value financial liabilities measured on recurring basis 6,926 6,926
Variable Interest Entity [Member] | Loans Receivable [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 1,819 1,881
Variable Interest Entity [Member] | Loan Repurchase Commitments [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 1,176 1,086
Cash And Cash Equivalents [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 862 814
Cash [Member] | Variable Interest Entity [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 72 176
State And Municipal Bonds [Member] | Variable Interest Entity [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 37 41
Corporate Obligations [Member] | Variable Interest Entity [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 288 293
Residential Mortgage-Backed Non-Agency [Member] | Mortgage-Backed Securities [Member] | Variable Interest Entity [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 899 875
Commercial Mortgage-Backed [Member] | Mortgage-Backed Securities [Member] | Variable Interest Entity [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 444 417
Collateralized Debt Obligations [Member] | Asset-Backed Securities [Member] | Variable Interest Entity [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 324 340
Other Asset-Backed [Member] | Asset-Backed Securities [Member] | Variable Interest Entity [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 164 184
Money Market Securities [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 700 593
Money Market Securities [Member] | Variable Interest Entity [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 220 210
Perpetual Debt And Equity Securities [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 49 57
Medium-Term Notes [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial liabilities measured on recurring basis 181 165
Fixed-Maturity Investments [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 4,921 5,203
Fixed-Maturity Investments [Member] | U.S. Treasury And Government Agency [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 740 884
Fixed-Maturity Investments [Member] | State And Municipal Bonds [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 1,527 1,532
Fixed-Maturity Investments [Member] | Foreign Governments [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 209 196
Fixed-Maturity Investments [Member] | Corporate Obligations [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 1,144 1,216
Fixed-Maturity Investments [Member] | Residential Mortgage-Backed Agency [Member] | Mortgage-Backed Securities [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 931 988
Fixed-Maturity Investments [Member] | Residential Mortgage-Backed Non-Agency [Member] | Mortgage-Backed Securities [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 90 98
Fixed-Maturity Investments [Member] | Commercial Mortgage-Backed [Member] | Mortgage-Backed Securities [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 37 48
Fixed-Maturity Investments [Member] | Collateralized Debt Obligations [Member] | Asset-Backed Securities [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 98 96
Fixed-Maturity Investments [Member] | Other Asset-Backed [Member] | Asset-Backed Securities [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 145 145
Derivative Assets [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 4 4
Derivative Assets [Member] | Interest Rate Derivatives [Member] | Non-Insured Derivatives [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 4 4
Derivative Liabilities [Member] | Interest Rate Derivatives [Member] | Variable Interest Entity [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial liabilities measured on recurring basis 126 141
Derivative Liabilities [Member] | Interest Rate Derivatives [Member] | Non-Insured Derivatives [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial liabilities measured on recurring basis (1) (2)
Derivative Liabilities [Member] | Credit Derivatives [Member] | Insured Derivatives [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial liabilities measured on recurring basis 3,006 2,934
Derivative Liabilities [Member] | Currency Derivatives [Member] | Variable Interest Entity [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial liabilities measured on recurring basis 23 21
Derivative Liabilities [Member] | Currency Derivatives [Member] | Non-Insured Derivatives [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial liabilities measured on recurring basis 1 2
Other Liabilities [Member] | Warrants [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial liabilities measured on recurring basis 12 6
Variable Interest Entity Notes [Member] | Variable Interest Entity [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial liabilities measured on recurring basis 3,578 3,659
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 2,625 2,678
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Cash And Cash Equivalents [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 862 814
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Cash [Member] | Variable Interest Entity [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 72 176
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Money Market Securities [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 693 585
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Money Market Securities [Member] | Variable Interest Entity [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 220 210
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Perpetual Debt And Equity Securities [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 27 23
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Fixed-Maturity Investments [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 751 870
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Fixed-Maturity Investments [Member] | U.S. Treasury And Government Agency [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 641 784
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Fixed-Maturity Investments [Member] | Foreign Governments [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 110 86
Significant Other Observable Inputs (Level 2) [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 5,943 6,049
Fair value financial liabilities measured on recurring basis 2,092 2,175
Significant Other Observable Inputs (Level 2) [Member] | State And Municipal Bonds [Member] | Variable Interest Entity [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 37 41
Significant Other Observable Inputs (Level 2) [Member] | Corporate Obligations [Member] | Variable Interest Entity [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 209 215
Significant Other Observable Inputs (Level 2) [Member] | Residential Mortgage-Backed Non-Agency [Member] | Mortgage-Backed Securities [Member] | Variable Interest Entity [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 893 869
Significant Other Observable Inputs (Level 2) [Member] | Commercial Mortgage-Backed [Member] | Mortgage-Backed Securities [Member] | Variable Interest Entity [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 416 410
Significant Other Observable Inputs (Level 2) [Member] | Collateralized Debt Obligations [Member] | Asset-Backed Securities [Member] | Variable Interest Entity [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 207 215
Significant Other Observable Inputs (Level 2) [Member] | Other Asset-Backed [Member] | Asset-Backed Securities [Member] | Variable Interest Entity [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 117 120
Significant Other Observable Inputs (Level 2) [Member] | Money Market Securities [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 7 8
Significant Other Observable Inputs (Level 2) [Member] | Perpetual Debt And Equity Securities [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 12 20
Significant Other Observable Inputs (Level 2) [Member] | Fixed-Maturity Investments [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 3,964 4,062
Significant Other Observable Inputs (Level 2) [Member] | Fixed-Maturity Investments [Member] | U.S. Treasury And Government Agency [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 99 100
Significant Other Observable Inputs (Level 2) [Member] | Fixed-Maturity Investments [Member] | State And Municipal Bonds [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 1,504 1,429
Significant Other Observable Inputs (Level 2) [Member] | Fixed-Maturity Investments [Member] | Foreign Governments [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 91 107
Significant Other Observable Inputs (Level 2) [Member] | Fixed-Maturity Investments [Member] | Corporate Obligations [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 1,087 1,140
Significant Other Observable Inputs (Level 2) [Member] | Fixed-Maturity Investments [Member] | Residential Mortgage-Backed Agency [Member] | Mortgage-Backed Securities [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 931 988
Significant Other Observable Inputs (Level 2) [Member] | Fixed-Maturity Investments [Member] | Residential Mortgage-Backed Non-Agency [Member] | Mortgage-Backed Securities [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 89 94
Significant Other Observable Inputs (Level 2) [Member] | Fixed-Maturity Investments [Member] | Commercial Mortgage-Backed [Member] | Mortgage-Backed Securities [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 24 20
Significant Other Observable Inputs (Level 2) [Member] | Fixed-Maturity Investments [Member] | Collateralized Debt Obligations [Member] | Asset-Backed Securities [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 61 65
Significant Other Observable Inputs (Level 2) [Member] | Fixed-Maturity Investments [Member] | Other Asset-Backed [Member] | Asset-Backed Securities [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 78 119
Significant Other Observable Inputs (Level 2) [Member] | Derivative Assets [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 81 89
Significant Other Observable Inputs (Level 2) [Member] | Derivative Assets [Member] | Interest Rate Derivatives [Member] | Non-Insured Derivatives [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 81 89
Significant Other Observable Inputs (Level 2) [Member] | Derivative Liabilities [Member] | Interest Rate Derivatives [Member] | Variable Interest Entity [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial liabilities measured on recurring basis 126 141
Significant Other Observable Inputs (Level 2) [Member] | Derivative Liabilities [Member] | Interest Rate Derivatives [Member] | Non-Insured Derivatives [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial liabilities measured on recurring basis 265 287
Significant Other Observable Inputs (Level 2) [Member] | Derivative Liabilities [Member] | Credit Derivatives [Member] | Insured Derivatives [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial liabilities measured on recurring basis 12 13
Significant Other Observable Inputs (Level 2) [Member] | Derivative Liabilities [Member] | Currency Derivatives [Member] | Non-Insured Derivatives [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial liabilities measured on recurring basis   1
Significant Other Observable Inputs (Level 2) [Member] | Other Liabilities [Member] | Warrants [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial liabilities measured on recurring basis 12 6
Significant Other Observable Inputs (Level 2) [Member] | Variable Interest Entity Notes [Member] | Variable Interest Entity [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial liabilities measured on recurring basis 1,677 1,727
Significant Unobservable Inputs (Level 3) [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 3,492 3,537
Fair value financial liabilities measured on recurring basis 5,103 5,044
Significant Unobservable Inputs (Level 3) [Member] | Variable Interest Entity [Member] | Loans Receivable [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 1,819 1,881
Significant Unobservable Inputs (Level 3) [Member] | Variable Interest Entity [Member] | Loan Repurchase Commitments [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 1,176 1,086
Significant Unobservable Inputs (Level 3) [Member] | Corporate Obligations [Member] | Variable Interest Entity [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 79 [1] 78 [1]
Significant Unobservable Inputs (Level 3) [Member] | Residential Mortgage-Backed Non-Agency [Member] | Mortgage-Backed Securities [Member] | Variable Interest Entity [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 6 [1] 6 [1]
Significant Unobservable Inputs (Level 3) [Member] | Commercial Mortgage-Backed [Member] | Mortgage-Backed Securities [Member] | Variable Interest Entity [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 28 [1] 7 [1]
Significant Unobservable Inputs (Level 3) [Member] | Collateralized Debt Obligations [Member] | Asset-Backed Securities [Member] | Variable Interest Entity [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 117 [1] 125 [1]
Significant Unobservable Inputs (Level 3) [Member] | Other Asset-Backed [Member] | Asset-Backed Securities [Member] | Variable Interest Entity [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 47 [1] 64 [1]
Significant Unobservable Inputs (Level 3) [Member] | Perpetual Debt And Equity Securities [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 10 [1] 14 [1]
Significant Unobservable Inputs (Level 3) [Member] | Medium-Term Notes [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial liabilities measured on recurring basis 181 [1] 165 [1]
Significant Unobservable Inputs (Level 3) [Member] | Fixed-Maturity Investments [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 206 271
Significant Unobservable Inputs (Level 3) [Member] | Fixed-Maturity Investments [Member] | State And Municipal Bonds [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 23 [1] 103 [1]
Significant Unobservable Inputs (Level 3) [Member] | Fixed-Maturity Investments [Member] | Foreign Governments [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 8 [1] 3 [1]
Significant Unobservable Inputs (Level 3) [Member] | Fixed-Maturity Investments [Member] | Corporate Obligations [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 57 [1] 76 [1]
Significant Unobservable Inputs (Level 3) [Member] | Fixed-Maturity Investments [Member] | Residential Mortgage-Backed Non-Agency [Member] | Mortgage-Backed Securities [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 1 [1] 4 [1]
Significant Unobservable Inputs (Level 3) [Member] | Fixed-Maturity Investments [Member] | Commercial Mortgage-Backed [Member] | Mortgage-Backed Securities [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 13 [1] 28 [1]
Significant Unobservable Inputs (Level 3) [Member] | Fixed-Maturity Investments [Member] | Collateralized Debt Obligations [Member] | Asset-Backed Securities [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 37 [1] 31 [1]
Significant Unobservable Inputs (Level 3) [Member] | Fixed-Maturity Investments [Member] | Other Asset-Backed [Member] | Asset-Backed Securities [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 67 [1] 26 [1]
Significant Unobservable Inputs (Level 3) [Member] | Derivative Assets [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 4 5
Significant Unobservable Inputs (Level 3) [Member] | Derivative Assets [Member] | Interest Rate Derivatives [Member] | Non-Insured Derivatives [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis 4 [1] 5 [1]
Significant Unobservable Inputs (Level 3) [Member] | Derivative Liabilities [Member] | Interest Rate Derivatives [Member] | Non-Insured Derivatives [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial liabilities measured on recurring basis 3 [1] 4 [1]
Significant Unobservable Inputs (Level 3) [Member] | Derivative Liabilities [Member] | Credit Derivatives [Member] | Insured Derivatives [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial liabilities measured on recurring basis 2,994 2,921
Significant Unobservable Inputs (Level 3) [Member] | Derivative Liabilities [Member] | Currency Derivatives [Member] | Variable Interest Entity [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial liabilities measured on recurring basis 23 [1] 21 [1]
Significant Unobservable Inputs (Level 3) [Member] | Derivative Liabilities [Member] | Currency Derivatives [Member] | Non-Insured Derivatives [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial liabilities measured on recurring basis 1 [1] 1 [1]
Significant Unobservable Inputs (Level 3) [Member] | Variable Interest Entity Notes [Member] | Variable Interest Entity [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial liabilities measured on recurring basis 1,901 1,932
Counterparty and Cash Collateral Netting [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis (81) (90)
Fair value financial liabilities measured on recurring basis (269) (293)
Counterparty and Cash Collateral Netting [Member] | Derivative Assets [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis (81) (90)
Counterparty and Cash Collateral Netting [Member] | Derivative Assets [Member] | Interest Rate Derivatives [Member] | Non-Insured Derivatives [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial assets measured on recurring basis (81) (90)
Counterparty and Cash Collateral Netting [Member] | Derivative Liabilities [Member] | Interest Rate Derivatives [Member] | Non-Insured Derivatives [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value financial liabilities measured on recurring basis $ (269) $ (293)
[1] Unobservable inputs are either not developed by the Company or do not significantly impact the overall fair values of the aggregate financial assets and liabilities.