Accounting Policies [Abstract] Accounting Policies [Abstract] Accounts Payable And Accrued Liabilities Current And Noncurrent Accounts payable and accrued liabilities Accounts Receivable Net Accounts receivable Accretion Amortization Of Discounts And Premiums Investments Net amortization of premiums and discounts Accrued Income Taxes Income taxes payable Accrued Insurance Current And Noncurrent Accrued retrospective premiums receivable Accrued Investment Income Receivable Accrued interest receivable Accumulated Other Comprehensive Income Loss Net Of Tax Accumulated other comprehensive income Accumulated Other Comprehensive Income [Member] Accumulated Other Comprehensive Income Attributable to Enstar Group Limited [Member] Acquisition Costs Acquisition costs Active Underwriting Segment [Member] Active Underwriting Segment [Member] Active Underwriting [Member] Additional Paid In Capital Common Stock Additional paid-in capital Additional Paid In Capital [Member] Additional Paid-in Capital [Member] Adjustments to additional Paid in capital Amortization Of Share Awards. Adjustments To Additional Paid In Capital Amortization Of Share Awards Amortization of equity incentive plan Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract] Adjustments to reconcile net earnings to cash flows provided by operating activities: Adoption of New Accounting Standards. Adoption Of New Accounting Standards Policy [Text Block] New Accounting Standards Adopted in 2014 Advised Case Reserves Advised Case Reserves Reserves with an estimate aggregate value Allocated Share Based Compensation Expense Compensation costs recognized in earnings Alternative Investments Fair Value Disclosure Total Fair Value Amendment Flag Amendment Flag Amortization of fair value adjustments. Amortization Of Fair Value Adjustments Amortization of fair value adjustments Amortization Of Fair Value Adjustments In Current Period Amortization Of Fair Value Adjustments In Current Period Amortization of fair value adjustments, Current Period Amortization Of Fair Value Adjustments In Prior Period Amortization Of Fair Value Adjustments In Prior Period Amortization of fair value adjustments, Prior Period Amortization Of Intangible Assets Amortization of Intangible Assets Intangible assets with a definite life, Intangible assets amortization Intangible assets, Accumulated Amortization Amortized Cost and Fair Value Debt Securities [Abstract] Amortized Cost And Fair Value Debt Securities [Abstract] Amortized Cost and Fair Value Debt Securities [Abstract] Annual Incentive Compensation Program Two Thousand Eleven Through Two Thousand Fifteen. Annual Incentive Compensation Program Two Thousand Eleven Through Two Thousand Fifteen [Member] 2011-2015 Annual Incentive Compensation Program [Member] Arden Reinsurance Company Limited [Member] Arden Reinsurance Company Limited [Member] Arden [Member] Asset Backed Securities [Member] Asset-Backed [Member] Assets Total assets TOTAL ASSETS Assets [Abstract] ASSETS Assumed Premiums Earned Assumed, Premiums Earned Assumed Premiums Written Assumed, Premiums Written Atrium Holding [Member] Atrium Holding [Member] Atrium [Member] Atrium [Member] Atrium [Member] Atrium [Member] Available For Sale Debt Securities Amortized Cost Basis Amortized Cost Amount of accumulated pre-tax unrealized gains before deducting pre-tax unrealized losses on investments in available-for-sale securities impacting investments. Available For Sale Debt Securities Gross Unrealized Gain Accumulated In Investments Gross Unrealized Holding Gains Amount of accumulated pre-tax unrealized loss before deducting pre-tax unrealized gain on investments in available-for-sale debt securities impacting investments. Available For Sale Debt Securities Gross Unrealized Loss Accumulated In Investments Gross Unrealized Holding Losses Non-OTTI Available For Sale Securities Fair Value Total fair value Amount of accumulated pre-tax unrealized loss on investments in available-for-sale securities that have been in a loss position for twelve months or longer impacting investments. Available For Sale Securities Continuous Unrealized Loss Position 12 Months Or Longer Aggregate Losses Accumulated In Investments Unrealized Losses, 12 Months or Greater Amount of accumulated pre-tax unrealized loss on investments on securities classified as available-for-sale securities impacting investments. Available For Sale Securities Continuous Unrealized Loss Position Aggregate Losses Accumulated In Investments Unrealized Losses, Total Available For Sale Securities Continuous Unrealized Loss Position Fair Value Fair value of securities classified as available-for-sale in an unrealized loss position Fair Value, Total Amount of accumulated pre-tax unrealized loss on investments in available-for-sale securities that have been in a loss position for less than twelve months impacting investments. Available For Sale Securities Continuous Unrealized Loss Position Less Than 12 Months Aggregate Losses Accumulated In Investments Unrealized Losses, Less Than 12 Months Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value Fair Value, Less Than 12 Months Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value Fair Value, 12 Months or Greater Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost Due after five years through ten years, Amortized Cost Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value Due after five years through ten years, Fair Value Available for sale securities debt maturities after five through ten years percent of fair value. Available For Sale Securities Debt Maturities After Five Through Ten Years Percent Of Fair Value Due after five years through ten years, Percentage of Total Fair Value Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost Due after one year through five years, Amortized Cost Available For Sale Securities Debt Maturities After One Through Five Years Fair Value Due after one year through five years, Fair Value Available for sale securities debt maturities after one through five years percent of fair value. Available For Sale Securities Debt Maturities After One Through Five Years Percent Of Fair Value Due after one year through five years, Percentage of Total Fair Value Available For Sale Securities Debt Maturities After Ten Years Amortized Cost Due after ten years, Amortized cost Available For Sale Securities Debt Maturities After Ten Years Fair Value Due after ten years, Fair Value Available for sale securities debt maturities after ten years percent of fair value. Available For Sale Securities Debt Maturities After Ten Years Percent Of Fair Value Due after ten years, Percentage of Total Fair Value Available For Sale Securities Debt Maturities Amortized Cost Amortized Cost Total amortized cost Available For Sale Securities Debt Maturities Remainder Of Fiscal Year Amortized Cost Basis Due in one year or less, Amortized Cost Available For Sale Securities Debt Maturities Remainder Of Fiscal Year Fair Value Due in one year or less, Fair Value Available for sale securities debt maturities remainder of fiscal year percent of fair value. Available For Sale Securities Debt Maturities Remainder Of Fiscal Year Percent Of Fair Value Due in one year or less, Percentage of Total Fair Value Available For Sale Securities Debt Maturities Single Maturity Date Total fair value or available for sale debt securities due in years Available For Sale Securities Debt Maturities Single Maturity Date Amortized Cost Basis Amortized cost due in years, Total Available for sale securities debt maturities with single maturity date percent of fair value. Available For Sale Securities Debt Maturities With Single Maturity Date Percent Of Fair Value Percentage of Total Fair Value Available For Sale Securities Debt Securities Fair Value Available For Sale Securities Debt Securities Current Short-term investments, available-for-sale, at fair value (amortized cost: 2014-$13,022; 2013-$32,477) Available For Sale Securities Debt Securities Noncurrent Fixed maturity investments, available-for-sale, at fair value (amortized cost: 2014 - $225,595; 2013-$210,825) Available for sale securities debt securities percent of fair value. Available For Sale Securities Debt Securities Percent Of Fair Value Percentage of Total Fair Value Available For Sale Securities Gross Realized Gains Gross realized gains on available-for-sale securities Available For Sale Securities Gross Realized Losses Gross realized losses on available-for-sale securities Availableforsale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions 1 Number of securities classified as available-for-sale in an unrealized loss position Availableforsale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions Greater Than Or Equal To One Year Number of securities classified as available-for-sale in an unrealized loss position for twelve months or longer Available For Sale Securities Short Term Investments Amortized Cost Short-term investments, available-for-sale, at fair value, amortized cost Available For Sale Securities [Text Block] Amortized Cost and Estimated Fair Values of Company's Fixed Maturity And Short-term Investments Classified as Available-for-Sale Bay Shore [Member] Bay Shore [Member] Bayshore [Member] Benefits Losses And Expenses Total expenses Total expenses Benefits Losses And Expenses [Abstract] EXPENSES B M Bermuda [Member] Brand [Member] Brand [Member] Brand [Member] Business Acquisition Acquiree [Domain] Business Acquisition, Acquiree [Domain] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition Date Of Acquisition Agreement 1 Amalgamation agreement date Business Acquisition Equity Interest Issued Or Issuable Trading Period Business Acquisition Equity Interest Issued Or Issuable Trading Period Average closing price of voting ordinary shares prior to trading period Business Acquisition Equity Interest Issued Or Issuable Value Assigned Company contributed purchase price Business Acquisition [Line Items] Business Acquisition [Line Items] Business Acquisition Percentage Of Voting Interests Acquired Interest owned by an entity Business Acquisition Purchase Price Allocation Redeemable Non Controlling Interest Business Acquisition Purchase Price Allocation Redeemable Non Controlling Interest Redeemable noncontrolling interest, initial contributions Business Acquisition Share Price Cash contribution Business combination assets and acquired and reinsurance reserves. Business Combination Assets And Acquired And Reinsurance Reserves Total assets and assumed gross reinsurance reserves received Business Combination Consideration Transferred 1 Acquisition purchase price Business Combination Disclosure [Text Block] Acquisitions Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Net Purchase price for amalgamation Business Combinations [Abstract] Business Combinations [Abstract] Business Combination Separately Recognized Transactions [Axis] Business Combination, Separately Recognized Transactions [Axis] Business Combination Separately Recognized Transactions [Domain] Business Combination, Separately Recognized Transactions [Domain] Business Combination Step Acquisition Equity Interest In Acquiree Fair Value 1 Contribution for share held Business Combination Step Acquisition Equity Interest In Acquiree Percentage Interest owned by an entity Carrying Reported Amount Fair Value Disclosure [Member] Fair Value [Member] Cash And Cash Equivalents At Carrying Value CASH AND CASH EQUIVALENTS, END OF PERIOD CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD Cash and cash equivalents Cash And Cash Equivalents Period Increase Decrease NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS Cash Cash Equivalents And Short Term Investments Assets on deposit with regulatory authorities Ceded Credit Risk [Axis] Ceded Credit Risk, Reinsurer [Axis] Ceded Credit Risk Concentrated Credit Risk [Member] Ceded Credit Risk, Concentrated Credit Risk [Member] Ceded Credit Risk [Line Items] Ceded Credit Risk [Line Items] Ceded Credit Risk Not Concentrated Credit Risk [Member] Ceded Credit Risk, Not Concentrated Credit Risk [Member] Ceded Credit Risk Reinsurer [Domain] Ceded Credit Risk, Reinsurer [Domain] Ceded Credit Risk Risk Classification [Axis] Ceded Credit Risk, Risk Classification [Axis] Ceded Credit Risk Risk Classification [Domain] Ceded Credit Risk, Risk Classification [Domain] Ceded Credit Risk [Table] Ceded Credit Risk [Table] Ceded Premiums Earned Ceded, Premiums Earned Ceded Premiums Written Ceded, Premiums Written Clarendon facility. Clarendon Facility [Member] Clarendon Facility [Member] Class Of Stock [Domain] Class of Stock [Domain] Closed Block Investments Fixed Maturity Available For Sale Amortized Cost Fixed maturity investments, available-for-sale, at fair value, amortized cost Collateralized Financings Collateral for secured letter of credit facility Commercial Mortgage Backed Securities [Member] Commercial Mortgage-Backed [Member] Commercial Mortgage Backed Securities Non Agency Residential Mortgage Backed Securities And Commercial Mortgage Backed Securities [Member] Commercial Mortgage Backed Securities Non Agency Residential Mortgage Backed Securities And Commercial Mortgage Backed Securities [Member] Residential and commercial mortgaged-backed securities [Member] Related party transaction capital commitment funded to entities affiliated. Commitment Funded Commitments, Funded Commitments And Contingencies COMMITMENTS AND CONTINGENCIES Commitments And Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Commitments And Contingencies Disclosure [Text Block] Commitments and Contingencies Commitments And Contingencies [Line Items] Commitments And Contingencies [Line Items] Commitments And Contingencies [Line Items] Commitments And Contingencies [Table] Commitments And Contingencies [Table] Commitments And Contingencies [Table] Common Stock [Member] Share Capital - Ordinary Shares [Member] Common Stock Ownership Percentage Common Stock Ownership Percentage Ordinary shares Common Stock Par Or Stated Value Per Share Common shares, par value Common Stock Shares Authorized Common shares, authorized Common Stock Shares Issued Ordinary shares, shares issued Common Stock Shares Outstanding Ordinary shares, shares outstanding Common Stock Value Ordinary shares Compensation And Retirement Disclosure [Abstract] Compensation and Retirement Disclosure [Abstract] Components of net realized and unrealized gains losses. Components Of Net Realized And Unrealized Gains Losses Table [Text Block] Components of Net Realized and Unrealized Gains (Losses) Comprehensive Income Net Of Tax COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSTAR GROUP LIMITED Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest Less comprehensive income attributable to noncontrolling interest Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest Comprehensive income Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Consolidation Policy [Text Block] Basis of Preparation and Consolidation Co Owner Ownership Percentage Co Owner Ownership Percentage Interest owned by co-investor Corporate Debt Securities [Member] Corporate [Member] Corsair [Member] Corsair [Member] Corsair [Member] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Credit rating of trading securities. Credit Rating Of Trading Securities Table [Text Block] Credit Ratings of Fixed Maturity and Short-Term Investments, Trading Credit Ratings Of Fixed Maturity Securities Classified As Available For Sale Table [Text Block] Credit Ratings Of Fixed Maturity Securities Classified As Available For Sale Table [Text Block] Credit Ratings Company's Fixed Maturity and Short-term Investments Available-for-Sale Credit Ratings of Fixed Maturity Securities Classified As Held To Maturity [Table Text Block] Credit Ratings Of Fixed Maturity Securities Classified As Held To Maturity Table [Text Block] Credit Ratings Company's Fixed Maturity Investments Held to Maturity Credit Rating Standard Poors [Axis] Credit Rating, Standard & Poor's [Axis] Cumulative Effect On Retained Earnings Net Of Tax 1 Adjustments recorded through retained earnings Current Federal Tax Expense Benefit Domestic (Bermuda) Current Fiscal Year End Date Current Fiscal Year End Date Current Foreign Tax Expense Benefit Foreign Current Income Tax Expense Benefit Current Current Income Tax Expense Benefit Continuing Operations [Abstract] Current: Debt Disclosure [Abstract] Debt Disclosure [Abstract] Debt Instrument Redemption Description Redemption request description Debt Security [Axis] Debt Security [Axis] Deferred Compensation And Ordinary Share Plan. Deferred Compensation And Ordinary Share Plan [Member] Enstar Group Limited Deferred Compensation and Ordinary Share Plan [Member] Deferred Compensation Arrangement With Individual Share Based Payments By Type Of Deferred Compensation [Axis] Type of Deferred Compensation [Axis] Deferred Compensation Arrangement With Individual Share Based Payments [Line Items] Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items] Deferred Federal Income Tax Expense Benefit Domestic (Bermuda) Deferred Foreign Income Tax Expense Benefit Foreign Deferred Income Tax Expense Benefit Deferred Deferred Income Tax Expense Benefit Continuing Operations [Abstract] Deferred: Deferred Tax Assets Liabilities Net Deferred tax assets Deferred Tax Liabilities Deferred tax liabilities Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plans Disclosures Defined Benefit Plans [Axis] Defined Benefit Plans and Other Postretirement Benefit Plans [Axis] Defined Benefit Plans [Domain] Defined Benefit Plan and Other Postretirement Benefit Plan [Domain] Depreciation Depletion And Amortization Depreciation and amortization Derivative By Nature [Axis] Derivative, by Nature [Axis] Derivative Fair Value Of Derivative Net Fair Value Derivative Inception Dates Contract Date Derivative Instruments And Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments And Hedging Activities Disclosure [Text Block] Derivative Instruments Derivative [Line Items] Derivative [Line Items] Derivative Maturity Dates Settlement Date Derivative Name [Domain] Derivative, Name [Domain] Derivative Notional Amount Contract Amount and Settlement Amount Derivative [Table] Derivative [Table] Director [Member] Mr. Carey [Member] Direct Premiums Earned Direct, Premiums Earned Direct Premiums Written Direct premiums written Direct, Premiums Written Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Disclosure Of Compensation Related Costs Share Based Payments [Text Block] Employee Benefits Distribution Channel [Member] Distribution Channel [Member] Distribution Channel [Member] Dividends Common Stock Cash Dividends paid Document And Entity Information [Abstract] Document And Entity Information [Abstract] Document And Entity Information [Abstract] Document Fiscal Period Focus Document Fiscal Period Focus Document Fiscal Year Focus Document Fiscal Year Focus Document Information [Line Items] Document Information [Line Items] Document Period End Date Document Period End Date Document Type Document Type Dowling [Member] Dowling [Member] Dowling [Member] Earnings Per Share [Abstract] Earnings Per Share [Abstract] Earnings Per Share Basic Net earnings per ordinary share attributable to Enstar Group Limited - basic Net earnings per ordinary share attributable to Enstar Group Limited shareholders Earnings Per Share Basic [Abstract] Basic earnings per ordinary share: EARNINGS PER SHARE-BASIC Earnings Per Share Diluted Net earnings per ordinary share attributable to Enstar Group Limited - diluted Net earnings per ordinary share attributable to Enstar Group Limited shareholders Earnings Per Share Diluted [Abstract] Diluted earnings per ordinary share: EARNINGS PER SHARE-DILUTED Earnings Per Share [Text Block] Earnings Per Share Effective Income Tax Rate Continuing Operations Effective tax rate Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate Expected tax rate