2.2.0.25truefalse04060 - Disclosure - Business Combination (Details)truefalseIn Millions, unless otherwise specifiedfalse1falsefalseUSDfalsefalse1/1/2009 - 12/31/2009 USD ($) USD ($) / shares $FROM_Jan01_2009_TO_Dec31_2009http://www.sec.gov/CIK0000911421duration2009-01-01T00:00:002009-12-31T00:00:00PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170EPSDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0USDUSD$2falsefalsefalsefalse12/7/2009 AS_OF_Dec07_2009http://www.sec.gov/CIK0000911421instant2009-12-07T00:00:000001-01-01T00:00:00PureStandardhttp://www.xbrl.org/2003/instancepurexbrli03falsefalseUSDtruefalse{us-gaap_BusinessAcquisitionAxis} : Paris Re [Member] 12/31/2009 USD ($) $AS_OF_Dec31_2009_us-gaap_BusinessAcquisitionAxis_ParisReMemberhttp://www.sec.gov/CIK0000911421instant2009-12-31T00:00:000001-01-01T00:00:00falsefalseParis Re [Member]us-gaap_BusinessAcquisitionAxisxbrldihttp://xbrl.org/2006/xbrldipre_ParisReMemberus-gaap_BusinessAcquisitionAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$4falsefalsetruefalse{us-gaap_BusinessAcquisitionAxis} : Paris Re [Member] 12/7/2009 AS_OF_Dec07_2009_us-gaap_BusinessAcquisitionAxis_ParisReMemberhttp://www.sec.gov/CIK0000911421instant2009-12-07T00:00:000001-01-01T00:00:00falsefalseParis Re [Member]us-gaap_BusinessAcquisitionAxisxbrldihttp://xbrl.org/2006/xbrldipre_ParisReMemberus-gaap_BusinessAcquisitionAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli05falsefalsetruefalse{us-gaap_BusinessAcquisitionAxis} : Paris Re [Member] 10/2/2009 AS_OF_Oct02_2009_us-gaap_BusinessAcquisitionAxis_ParisReMemberhttp://www.sec.gov/CIK0000911421instant2009-10-02T00:00:000001-01-01T00:00:00falsefalseParis Re [Member]us-gaap_BusinessAcquisitionAxisxbrldihttp://xbrl.org/2006/xbrldipre_ParisReMemberus-gaap_BusinessAcquisitionAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli06falsefalsetruefalse{us-gaap_BusinessAcquisitionAxis} : Paris Re [Member] 7/31/2009 AS_OF_Jul31_2009_us-gaap_BusinessAcquisitionAxis_ParisReMemberhttp://www.sec.gov/CIK0000911421instant2009-07-31T00:00:000001-01-01T00:00:00falsefalseParis Re [Member]us-gaap_BusinessAcquisitionAxisxbrldihttp://xbrl.org/2006/xbrldipre_ParisReMemberus-gaap_BusinessAcquisitionAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli02true0us-gaap_BusinessAcquisitionLineItemsus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalseOtherxbrli:stringItemTypestringLine items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.falsefalseBusiness Acquisition [Line Items]3false0us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquiredus-gaaptruenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00falsefalsefalsefalsefalse2truetruefalse1.001.00falsefalsefalsefalsefalse3falsetruefalse00falsefalsefalsetruefalse4truetruefalse1.001.00falsefalsefalsetruefalse5truetruefalse0.830.83falsefalsefalsetruefalse6falsetruefalse00falsefalsefalsetruefalseOtherus-types:percentItemTypepurePercentage of voting equity interests acquired in the business combination.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 68 -Subparagraph c falsefalsePercentage of voting interests acquired4false0pre_BusinessCombinationStepAcquisitionPriorPercentageEquityInterestInAcquireeprefalsenainstantIn a business combination achieved in stages, this element represents the acquisition-date percentage of equity in the...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsetruefalse00falsefalsefalsefalsefalse2falsetruefalse00falsefalsefalsefalsefalse3falsetruefalse00falsefalsefalsetruefalse4falsetruefalse00falsefalsefalsetruefalse5falsetruefalse00falsefalsefalsetruefalse6truetruefalse0.060.06falsefalsefalsetruefalseOtherus-types:percentItemTypepureIn a business combination achieved in stages, this element represents the acquisition-date percentage of equity in the acquiree held by the acquirer immediately before the acquisition date.No authoritative reference available.falsefalsePercentage of voting interests ownership prior to acquisition5false0pre_IncreaseInPercentageVotingInterestsOwnedprefalsenainstantIn a business combination achieved in stages, this element represents the additional percentage of the acquiree's outstanding...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsetruefalse00falsefalsefalsefalsefalse2falsetruefalse00falsefalsefalsefalsefalse3falsetruefalse00falsefalsefalsetruefalse4falsetruefalse00falsefalsefalsetruefalse5truetruefalse0.770.77falsefalsefalsetruefalse6falsetruefalse00falsefalsefalsetruefalseOtherus-types:percentItemTypepureIn a business combination achieved in stages, this element represents the additional percentage of the acquiree's outstanding equity that was acquired by the acquirer on the acquisition date.No authoritative reference available.falsefalsePercentage of voting interests acquired in a transaction6false0us-gaap_BusinessAcquisitionCostOfAcquiredEntityPurchasePriceus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3truefalsefalse19797000001979.7falsetruefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe total cost of the acquired entity including the cash paid to shareholders of acquired entities, fair value of debt and equity securities issued to shareholders of acquired entities, the fair value of the liabilities assumed, and direct costs of the acquisition.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph d falsefalseAggregate purchase price paid by the Company to acquire 100% of the outstanding Paris Re common shares and warrants7false0us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3truefalsefalse19537000001953.7falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe net amount recognized as of the acquisition date for the aggregate identifiable assets acquired in excess of or less than the aggregate liabilities assumed.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 68 -Subparagraph i falsefalseTotal identifiable net assets acquired, at fair value8false0us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillAmountus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3truefalsefalse2600000026falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryAmount of goodwill arising from a business combination, which is the excess of the cost of the acquired entity over the amounts assigned to assets acquired and liabilities assumed.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 52 -Subparagraph c Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 53 -Subparagraph d falsefalseGoodwill recorded in connection with acquisition9false0us-gaap_NetIncomeLossAttributableToNoncontrollingInterestus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse43000004.3falsetruefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe portion of net income (loss) attributable to the noncontrolling interest (if any) deducted in order to derive the portion attributable to the parent.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph a Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph c(1) Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A1, A4, A5 falsefalseAmount of net income attributable to non-controlling interest of subsidiary for the period October 2, 2009 to December 7, 200968Business Combination (Details) (USD $)HundredThousandsUnKnownUnKnownUnKnowntruetrue