v3.26.1
Cover - shares
6 Months Ended
Jun. 30, 2026
Jul. 24, 2026
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2026  
Document Transition Report false  
Entity File Number 001-36052  
Entity Registrant Name SIRIUSPOINT LTD.  
Entity Incorporation, State or Country Code D0  
Entity Tax Identification Number 98-1599372  
Entity Address, Address Line One Point Building  
Entity Address, Address Line Two 3 Waterloo Lane  
Entity Address, City or Town Pembroke  
Entity Address, Postal Zip Code HM 08  
Entity Address, Country BM  
City Area Code 441  
Local Phone Number 542-3300  
Title of 12(b) Security Common Shares, $0.10 par value  
Trading Symbol SPNT  
Security Exchange Name NYSE  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   116,165,016
Entity Central Index Key 0001576018  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q2  
Amendment Flag false