v2.4.0.6
Condensed Consolidating Financial Information Provided In Connection With Outstanding Debt Of Subsidiaries (Condensed Consolidating Balance Sheet) (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Jun. 30, 2011
Dec. 31, 2010
Assets        
Total investments $ 6,590,610 $ 6,209,252    
Cash and cash equivalents 264,232 216,984 237,737 277,738
Investments in subsidiaries 0 0    
Due from subsidiaries and affiliates 0 0    
Premiums receivable 971,546 471,878    
Prepaid reinsurance premiums 278,242 58,522    
Reinsurance recoverable 198,777 404,029    
Accrued investment income 35,938 33,523    
Deferred acquisition costs 106,027 43,721    
Other assets 514,146 307,003    
Total assets 8,959,518 7,744,912    
Liabilities        
Reserve for claims and claim expenses 1,801,247 1,992,354    
Unearned premiums 964,499 347,655    
Debt 354,293 353,620    
Amounts due to subsidiaries and affiliates 0 0    
Reinsurance balances payable 396,669 256,883    
Other liabilities 693,052 514,633    
Liabilities of discontinued operations held for sale 1,959 13,507    
Total liabilities 4,211,719 3,478,652    
Redeemable noncontrolling interest - DaVinciRe 900,878 657,727    
Shareholders' Equity        
Total shareholders' equity 3,846,921 3,608,533 3,518,701  
Total liabilities, noncontrolling interests and shareholders' equity 8,959,518 7,744,912    
RenaissanceRe Holdings Ltd. (Parent Guarantor) [Member]
        
Assets        
Total investments 348,875 593,973    
Cash and cash equivalents 4,749 10,606 3,014 3,414
Investments in subsidiaries 3,277,526 2,776,997    
Due from subsidiaries and affiliates 117,128 172,069    
Premiums receivable 0 0    
Prepaid reinsurance premiums 0 0    
Reinsurance recoverable 0 0    
Accrued investment income 3,030 4,106    
Deferred acquisition costs 0 0    
Other assets 209,827 206,171    
Total assets 3,961,135 3,763,922    
Liabilities        
Reserve for claims and claim expenses 0 0    
Unearned premiums 0 0    
Debt 100,000 100,000    
Amounts due to subsidiaries and affiliates 0 30,519    
Reinsurance balances payable 0 0    
Other liabilities 18,125 28,210    
Liabilities of discontinued operations held for sale 0 0    
Total liabilities 118,125 158,729    
Redeemable noncontrolling interest - DaVinciRe 0 0    
Shareholders' Equity        
Total shareholders' equity 3,843,010 3,605,193    
Total liabilities, noncontrolling interests and shareholders' equity 3,961,135 3,763,922    
RenRe North America Holdings Inc. (Subsidiary Issuer) [Member]
        
Assets        
Total investments 41,934 104,869    
Cash and cash equivalents 871 4,920 276 3,940
Investments in subsidiaries 104,976 83,031    
Due from subsidiaries and affiliates 0 846    
Premiums receivable 0 0    
Prepaid reinsurance premiums 0 0    
Reinsurance recoverable 0 0    
Accrued investment income 79 311    
Deferred acquisition costs 0 0    
Other assets 27,710 27,198    
Total assets 175,570 221,175    
Liabilities        
Reserve for claims and claim expenses 0 0    
Unearned premiums 0 0    
Debt 249,293 249,247    
Amounts due to subsidiaries and affiliates 5,215 6,081    
Reinsurance balances payable 0 0    
Other liabilities 5,571 3,755    
Liabilities of discontinued operations held for sale 1,959 13,507    
Total liabilities 262,038 272,590    
Redeemable noncontrolling interest - DaVinciRe 0 0    
Shareholders' Equity        
Total shareholders' equity (86,468) (51,415)    
Total liabilities, noncontrolling interests and shareholders' equity 175,570 221,175    
Other RenaissanceRe Holdings Ltd. Subsidiaries And Eliminations (Non-Guarantor Subsidiaries) [Member]
        
Assets        
Total investments 6,199,801 [1] 5,510,410 [1]    
Cash and cash equivalents 258,612 [1] 201,458 [1] 234,447 [1] 270,384 [1]
Investments in subsidiaries 0 [1] 0 [1]    
Due from subsidiaries and affiliates 0 [1] 0 [1]    
Premiums receivable 971,546 [1] 471,878 [1]    
Prepaid reinsurance premiums 278,242 [1] 58,522 [1]    
Reinsurance recoverable 198,777 [1] 404,029 [1]    
Accrued investment income 32,829 [1] 29,106 [1]    
Deferred acquisition costs 106,027 [1] 43,721 [1]    
Other assets 495,109 [1] 275,092 [1]    
Total assets 8,540,943 [1] 6,994,216 [1]    
Liabilities        
Reserve for claims and claim expenses 1,801,247 [1] 1,992,354 [1]    
Unearned premiums 964,499 [1] 347,655 [1]    
Debt 5,000 [1] 4,373 [1]    
Amounts due to subsidiaries and affiliates 0 [1] 0 [1]    
Reinsurance balances payable 396,669 [1] 256,883 [1]    
Other liabilities 670,814 [1] 482,668 [1]    
Liabilities of discontinued operations held for sale 0 [1] 0 [1]    
Total liabilities 3,838,229 [1] 3,083,933 [1]    
Redeemable noncontrolling interest - DaVinciRe 900,878 [1] 657,727 [1]    
Shareholders' Equity        
Total shareholders' equity 3,801,836 [1] 3,252,556 [1]    
Total liabilities, noncontrolling interests and shareholders' equity 8,540,943 [1] 6,994,216 [1]    
Consolidating Adjustments [Member]
        
Assets        
Total investments 0 [2] 0 [2]    
Cash and cash equivalents 0 [2] 0 [2]    
Investments in subsidiaries (3,382,502) [2] (2,860,028) [2]    
Due from subsidiaries and affiliates (117,128) [2] (172,915) [2]    
Premiums receivable 0 [2] 0 [2]    
Prepaid reinsurance premiums 0 [2] 0 [2]    
Reinsurance recoverable 0 [2] 0 [2]    
Accrued investment income 0 [2] 0 [2]    
Deferred acquisition costs 0 [2] 0 [2]    
Other assets (218,500) [2] (201,458) [2]    
Total assets (3,718,130) [2] (3,234,401) [2]    
Liabilities        
Reserve for claims and claim expenses 0 [2] 0 [2]    
Unearned premiums 0 [2] 0 [2]    
Debt 0 [2] 0 [2]    
Amounts due to subsidiaries and affiliates (5,215) [2] (36,600) [2]    
Reinsurance balances payable 0 [2] 0 [2]    
Other liabilities (1,458) [2] 0 [2]    
Liabilities of discontinued operations held for sale 0 [2] 0 [2]    
Total liabilities (6,673) [2] (36,600) [2]    
Redeemable noncontrolling interest - DaVinciRe 0 [2] 0 [2]    
Shareholders' Equity        
Total shareholders' equity (3,711,457) [2] (3,197,801) [2]    
Total liabilities, noncontrolling interests and shareholders' equity $ (3,718,130) [2] $ (3,234,401) [2]    
[1] Includes all other subsidiaries of RenaissanceRe Holdings Ltd. and eliminations.
[2] Includes Parent Guarantor and Subsidiary Issuer consolidating adjustments.