XML 78 R60.htm IDEA: XBRL DOCUMENT v3.23.1
Insurance Contracts Financial Guarantee Insurance Contracts - Components of Loss and Loss Expense Reserves and Subrogation Recoverable (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Dec. 31, 2022
Dec. 31, 2021
Components of Loss and Loss Expense Reserves and Subrogation Recoverable [Line Items]        
Ceded Loss And Loss Expenses Paid Not Yet Recovered   $ 0    
Policyholder Benefits and Claims Incurred, Ceded $ 20 7    
Subrogation recoverable (146)   $ (271)  
Claim liability reported on Balance Sheet, before reinsurance 598   444  
Liability for Claims and Claims Adjustment Expense 851   805  
Liability for Claim and Claim Adjustment Expenses Net of Subrogation recoverables 705 $ (647) 534 $ (522)
Property and Casualty, Commercial Insurance        
Components of Loss and Loss Expense Reserves and Subrogation Recoverable [Line Items]        
Liability for Claims and Claims Adjustment Expense 107   90  
Liability for Claim and Claim Adjustment Expenses Net of Subrogation recoverables 107   90  
Present Value of Expected Net Cash Flows- Claims and Loss Expenses [Member]        
Components of Loss and Loss Expense Reserves and Subrogation Recoverable [Line Items]        
Subrogation recoverable 2   5  
Claim liability reported on Balance Sheet, before reinsurance 824   791  
Liability for Claims and Claims Adjustment Expense 822   787  
Present Value of Expected Net Cash Flows-Recoveries [Member]        
Components of Loss and Loss Expense Reserves and Subrogation Recoverable [Line Items]        
Subrogation recoverable (148)   (276)  
Claim liability reported on Balance Sheet, before reinsurance (196)   (319)  
Liability for Claims and Claims Adjustment Expense (48)   (44)  
Unearned Premium Reserve [Member]        
Components of Loss and Loss Expense Reserves and Subrogation Recoverable [Line Items]        
Subrogation recoverable 0   0  
Claim liability reported on Balance Sheet, before reinsurance (30)   (28)  
Liability for Claims and Claims Adjustment Expense $ (30)   $ (28)