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Outstanding Exposure - Schedule of Non-Financial Guaranty Exposure (Details) - USD ($)
$ in Millions
Sep. 30, 2022
Dec. 31, 2021
Schedule of Insured Financial Obligations [Line Items]    
Gross Exposure $ 1,656 $ 1,605
Net Exposure 1,169 1,071
Life insurance transactions    
Schedule of Insured Financial Obligations [Line Items]    
Gross Exposure 1,301 1,250
Net Exposure 969 871
Life insurance transactions | Maximum    
Schedule of Insured Financial Obligations [Line Items]    
Net Exposure 1,100  
Aircraft residual value insurance policies    
Schedule of Insured Financial Obligations [Line Items]    
Gross Exposure 355 355
Net Exposure $ 200 $ 200