v3.26.1
Future Policy Benefits - Expected future benefits, expenses, and gross premiums (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Mar. 31, 2025
Individual Retirement    
Liability for Future Policy Benefit, Activity [Line Items]    
Undiscounted expected future benefits and expense $ 1,853 $ 1,831
Undiscounted expected future gross premiums 0 0
Group Retirement    
Liability for Future Policy Benefit, Activity [Line Items]    
Undiscounted expected future benefits and expense 404 438
Undiscounted expected future gross premiums 0 0
Life Insurance    
Liability for Future Policy Benefit, Activity [Line Items]    
Undiscounted expected future benefits and expense 28,973 30,663
Undiscounted expected future gross premiums 18,782 21,252
Discounted expected future gross premiums (at current discount rate) 12,682 14,159
Institutional Markets    
Liability for Future Policy Benefit, Activity [Line Items]    
Undiscounted expected future benefits and expense 53,779 44,348
Undiscounted expected future gross premiums 0 0
Corporate & Other    
Liability for Future Policy Benefit, Activity [Line Items]    
Undiscounted expected future benefits and expense 39,509 40,826
Undiscounted expected future gross premiums 1,765 1,932
Discounted expected future gross premiums (at current discount rate) $ 1,198 $ 1,297