CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) $ in Millions	12 Months Ended
Dec. 31, 2021 USD ($)
Statement of Cash Flows [Abstract]
Fair value of securities transferred from available for sale to fixed maturities, held to maturity	$ 405

Transfer To Investments Available For Sale To Fixed Maturities

No definition available.

Name:	axs_TransferToInvestmentsAvailableForSaleToFixedMaturities
Namespace Prefix:	axs_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration