XML 89 R77.htm IDEA: XBRL DOCUMENT v3.21.2
Contingencies, Commitments and Guarantees (Commitments and Guarantees - Narrative) (Details) - USD ($)
$ in Millions
Sep. 30, 2021
Dec. 31, 2020
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Cumulative maximum indemnities and guarantees contractual limitation $ 118  
Liabilities for indemnities, guarantees and commitments 1 $ 1
Minimum    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Indemnities And Guarantees Contractual Limitation Range 1  
Minimum | Non-litigation loss    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Loss Contingency, Range of Possible Loss, Portion Not Accrued 0  
Maximum    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Loss Contingency, Range of Possible Loss, Portion Not Accrued 10  
Indemnities And Guarantees Contractual Limitation Range 112  
Maximum | Non-litigation loss    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Loss Contingency, Range of Possible Loss, Portion Not Accrued 250  
Mortgage Loan Commitments    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability 734 210
Commitments to Fund Partnership Investments and Private Corporate Bond Investments    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability $ 2,300 $ 1,700