v3.23.1
Lending Activities - Credit quality performance indicators for commercial mortgages (Details)
$ in Millions
Dec. 31, 2022
USD ($)
loan
Dec. 31, 2021
USD ($)
loan
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Financing Receivable, Credit Quality Indicator [Line Items]        
Total $ 45,166 $ 39,884    
Allowance for credit losses $ 600 $ 496 $ 657 $ 357
Commercial Mortgages        
Financing Receivable, Credit Quality Indicator [Line Items]        
Number of Loans | loan 611 624    
Total $ 32,993 $ 30,528    
Allowance for credit losses $ 531 $ 423 $ 546 $ 266
Percent of Total 100.00% 100.00%    
Percentage of total, allowance for credit losses 2.00% 1.00%    
Commercial Mortgages | In good standing        
Financing Receivable, Credit Quality Indicator [Line Items]        
Number of Loans | loan 599 613    
Total $ 32,344 $ 30,079    
Percent of Total 98.00% 99.00%    
Commercial Mortgages | Restructured        
Financing Receivable, Credit Quality Indicator [Line Items]        
Number of Loans | loan 9 7    
Total $ 482 $ 390    
Percent of Total 1.00% 1.00%    
Commercial Mortgages | 90 days or less delinquent        
Financing Receivable, Credit Quality Indicator [Line Items]        
Number of Loans | loan 0 0    
Total $ 0 $ 0    
Percent of Total 0.00% 0.00%    
Commercial Mortgages | >90 days delinquent or in process of foreclosure        
Financing Receivable, Credit Quality Indicator [Line Items]        
Number of Loans | loan 3 4    
Total $ 167 $ 59    
Percent of Total 1.00% 0.00%    
Commercial Mortgages | Apartments        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total $ 13,226 $ 12,394    
Allowance for credit losses 89 93    
Commercial Mortgages | Apartments | In good standing        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 13,226 12,394    
Commercial Mortgages | Apartments | Restructured        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 0 0    
Commercial Mortgages | Apartments | 90 days or less delinquent        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 0 0    
Commercial Mortgages | Apartments | >90 days delinquent or in process of foreclosure        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 0 0    
Commercial Mortgages | Offices        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 8,966 8,698    
Allowance for credit losses 294 193    
Commercial Mortgages | Offices | In good standing        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 8,470 8,370    
Commercial Mortgages | Offices | Restructured        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 329 269    
Commercial Mortgages | Offices | 90 days or less delinquent        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 0 0    
Commercial Mortgages | Offices | >90 days delinquent or in process of foreclosure        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 167 59    
Commercial Mortgages | Retail        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 3,286 4,043    
Allowance for credit losses 54 69    
Commercial Mortgages | Retail | In good standing        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 3,192 4,026    
Commercial Mortgages | Retail | Restructured        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 94 17    
Commercial Mortgages | Retail | 90 days or less delinquent        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 0 0    
Commercial Mortgages | Retail | >90 days delinquent or in process of foreclosure        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 0 0    
Commercial Mortgages | Industrial        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 5,417 3,262    
Allowance for credit losses 65 39    
Commercial Mortgages | Industrial | In good standing        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 5,417 3,262    
Commercial Mortgages | Industrial | Restructured        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 0 0    
Commercial Mortgages | Industrial | 90 days or less delinquent        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 0 0    
Commercial Mortgages | Industrial | >90 days delinquent or in process of foreclosure        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 0 0    
Commercial Mortgages | Hotel        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 1,808 1,830    
Allowance for credit losses 23 23    
Commercial Mortgages | Hotel | In good standing        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 1,749 1,726    
Commercial Mortgages | Hotel | Restructured        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 59 104    
Commercial Mortgages | Hotel | 90 days or less delinquent        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 0 0    
Commercial Mortgages | Hotel | >90 days delinquent or in process of foreclosure        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 0 0    
Commercial Mortgages | Others        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 290 301    
Allowance for credit losses 6 6    
Commercial Mortgages | Others | In good standing        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 290 301    
Commercial Mortgages | Others | Restructured        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 0 0    
Commercial Mortgages | Others | 90 days or less delinquent        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 0 0    
Commercial Mortgages | Others | >90 days delinquent or in process of foreclosure        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total $ 0 $ 0