Cover - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Feb. 20, 2023	Jun. 30, 2022
Entity Listings [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2022
Current Fiscal Year End Date	--12-31
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	Pembroke
Entity Address, Country	BM
Entity Address, Postal Zip Code	HM 08
City Area Code	441
Local Phone Number	542-3300
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 482.8
Entity Common Stock, Shares Outstanding		162,381,470
Documents Incorporated by Reference	Part III incorporates information from certain portions of the registrant’s definitive proxy statement to be filed with the Securities and Exchange Commission within 120 days after the fiscal year ended December 31, 2022.
Entity Central Index Key	0001576018
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	FY
Amendment Flag	false
Common Shares, $0.10 par value
Entity Listings [Line Items]
Title of 12(b) Security	Common Shares, $0.10 par value
Trading Symbol	SPNT
Security Exchange Name	NYSE
8.00% Resettable Fixed Rate Preference Shares, Series B, $0.10 par value, $25.00 liquidation preference per share
Entity Listings [Line Items]
Title of 12(b) Security	8.00% Resettable Fixed Rate Preference Shares, Series B, $0.10 par value, $25.00 liquidation preference per share
Trading Symbol	SPNT PB
Security Exchange Name	NYSE