v3.26.1
Investments (Allowance for Credit Losses) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Financing Receivable, Allowance for Credit Loss [Roll Forward]    
Allowance, beginning of period $ 469 $ 574
Addition to (release of) allowance for expected losses 17 58
Other 1  
Allowance, end of period 487 632
Commercial Mortgage Loans    
Financing Receivable, Allowance for Credit Loss [Roll Forward]    
Allowance, beginning of period 366 407
Addition to (release of) allowance for expected losses (17) 53
Other 1  
Allowance, end of period 350 460
Agricultural Property Loans    
Financing Receivable, Allowance for Credit Loss [Roll Forward]    
Allowance, beginning of period 48 121
Addition to (release of) allowance for expected losses 11 2
Other 0  
Allowance, end of period 59 123
Residential Mortgage Loans    
Financing Receivable, Allowance for Credit Loss [Roll Forward]    
Allowance, beginning of period 15 0
Addition to (release of) allowance for expected losses 7 0
Other 0  
Allowance, end of period 22 0
Other Collateralized Loans    
Financing Receivable, Allowance for Credit Loss [Roll Forward]    
Allowance, beginning of period 40 32
Addition to (release of) allowance for expected losses (9) 2
Other 0  
Allowance, end of period 31 34
Uncollateralized Loans    
Financing Receivable, Allowance for Credit Loss [Roll Forward]    
Allowance, beginning of period 0 14
Addition to (release of) allowance for expected losses 25 1
Other 0  
Allowance, end of period $ 25 $ 15