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The change in such unrealized losses between measurement dates are included in the statement of income.No authoritative reference available.falsefalseGross unrealized losses125false0us-gaap_TradingSecuritiesus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse10716760001071676000falsefalsefalsefalsefalse2truefalsefalse795539000795539000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe total of financial instruments that are bought and held principally for the purpose of selling them in the near term (thus held for only a short period of time) or for debt and equity securities formerly categorized as available-for-sale or held-to-maturity which the entity held as of the date it opted to account for such securities at fair value. An enterprise may also categorize such a security as trading without the intent to sell it in the near term assuming the decision to categorize the security as trading occurred at acquisition; this is the reason why the trading category of investments in debt and equity securities are bought and sold "principally" for sale in the near term. Transfers into and out of the trading category should be rare. Such financial instruments that are held as of the reporting date are measured at fair value with unrealized holding gains and losses (the difference between fair value and the previously reported carrying amount) included in earnings.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 159 -Paragraph 29 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 13 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Implementation Guide (Q and A) -Number FAS115 -Paragraph 35 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 12 -Subparagraph a truefalseFair value130false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.partnerre.com/role/disclosureinvestmentsdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse23falsefalseUSDtruefalse{pre_TradingSecuritiesByBalanceSheetDisclosureAxis} : Trading securities [Member] {us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsMajorTypesOfTradingSecuritiesAndAssetsAxis} : Fixed maturities [Member] 12/31/2010 USD ($) $AS_OF_Dec31_2010_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsMajorTypesOfTradingSecuritiesAndAssetsAxis_FixedMaturitiesMember_pre_TradingSecuritiesByBalanceSheetDisclosureAxis_TradingSecuritiesMemberhttp://www.sec.gov/CIK0000911421instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseTrading securities [Member]pre_TradingSecuritiesByBalanceSheetDisclosureAxisxbrldihttp://xbrl.org/2006/xbrldipre_TradingSecuritiesMemberpre_TradingSecuritiesByBalanceSheetDisclosureAxisexplicitMemberfalsefalseFixed maturities [Member]us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsMajorTypesOfTradingSecuritiesAndAssetsAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FixedMaturitiesMemberus-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsMajorTypesOfTradingSecuritiesAndAssetsAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$24falsefalseUSDtruefalse{pre_TradingSecuritiesByBalanceSheetDisclosureAxis} : Trading securities [Member] {us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsMajorTypesOfTradingSecuritiesAndAssetsAxis} : Fixed maturities [Member] 12/31/2009 USD ($) $AS_OF_Dec31_2009_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsMajorTypesOfTradingSecuritiesAndAssetsAxis_FixedMaturitiesMember_pre_TradingSecuritiesByBalanceSheetDisclosureAxis_TradingSecuritiesMemberhttp://www.sec.gov/CIK0000911421instant2009-12-31T00:00:000001-01-01T00:00:00falsefalseTrading securities [Member]pre_TradingSecuritiesByBalanceSheetDisclosureAxisxbrldihttp://xbrl.org/2006/xbrldipre_TradingSecuritiesMemberpre_TradingSecuritiesByBalanceSheetDisclosureAxisexplicitMemberfalsefalseFixed maturities [Member]us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsMajorTypesOfTradingSecuritiesAndAssetsAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FixedMaturitiesMemberus-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsMajorTypesOfTradingSecuritiesAndAssetsAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseTrading securities [Member] | Fixed maturities [Member]131true0us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItemsus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli: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.falsefalseSchedule Of Trading Securities And Other Trading Assets [Line Items]132false0pre_TradingSecuritiesCostprefalsedebitinstantThis item represents a parenthetical disclosure for the cost of securities classified as trading.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse1239479700012394797000falsefalsefalsefalsefalse2truefalsefalse1385684000013856840000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThis item represents a parenthetical disclosure for the cost of securities classified as trading.No authoritative reference available.falsefalseCost133false0pre_TradingSecuritiesGrossUnrealizedGainsprefalsedebitinstantThis item represents the gross unrealized gains for securities which are categorized as trading. Such gross unrealized losses...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse491330000491330000falsefalsefalsefalsefalse2truefalsefalse381461000381461000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThis item represents the gross unrealized gains for securities which are categorized as trading. Such gross unrealized losses are the excess of the carrying value of the trading securities over their fair value as of the reporting date. The change in such unrealized losses between measurement dates are included in the statement of income.No authoritative reference available.falsefalseGross unrealized gains134false0pre_TradingSecuritiesGrossUnrealizedLossesprefalsedebitinstantThis item represents the gross unrealized losses for securities which are categorized as trading. Such gross unrealized...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse-61738000-61738000falsefalsefalsefalsefalse2truefalsefalse-95208000-95208000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThis item represents the gross unrealized losses for securities which are categorized as trading. Such gross unrealized losses are the excess of the carrying value of the trading securities over their fair value as of the reporting date. The change in such unrealized losses between measurement dates are included in the statement of income.No authoritative reference available.falsefalseGross unrealized losses135false0us-gaap_TradingSecuritiesus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse1282438900012824389000falsetruefalsefalsefalse2truefalsefalse1414309300014143093000falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe total of financial instruments that are bought and held principally for the purpose of selling them in the near term (thus held for only a short period of time) or for debt and equity securities formerly categorized as available-for-sale or held-to-maturity which the entity held as of the date it opted to account for such securities at fair value. An enterprise may also categorize such a security as trading without the intent to sell it in the near term assuming the decision to categorize the security as trading occurred at acquisition; this is the reason why the trading category of investments in debt and equity securities are bought and sold "principally" for sale in the near term. Transfers into and out of the trading category should be rare. Such financial instruments that are held as of the reporting date are measured at fair value with unrealized holding gains and losses (the difference between fair value and the previously reported carrying amount) included in earnings.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 159 -Paragraph 29 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 13 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Implementation Guide (Q and A) -Number FAS115 -Paragraph 35 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 12 -Subparagraph a truefalseFair value288Investments (Details) (USD $)NoRoundingUnKnownUnKnownUnKnowntruetrue