v3.26.1
Derivative Instruments - Schedule of Aggregate Contractual Notional Amounts and Fair Values of Derivatives (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Assets    
Fair Value $ 701 $ 448
Freestanding derivatives    
Derivative [Line Items]    
Contractual/Notional Amount 101,494 97,830
Assets    
Fair Value 682 430
Liabilities    
Fair Value 226 235
Net Fair Value, Asset (Liability) 456 195
Freestanding derivatives | Cross-currency swaps    
Derivative [Line Items]    
Contractual/Notional Amount 1,595 1,379
Assets    
Fair Value 140 133
Liabilities    
Fair Value 100 114
Net Fair Value, Asset (Liability) 40 19
Freestanding derivatives | Equity index futures    
Derivative [Line Items]    
Contractual/Notional Amount 45,209 43,905
Assets    
Fair Value 0 0
Liabilities    
Fair Value 0 0
Net Fair Value, Asset (Liability) 0 0
Freestanding derivatives | Equity index put options    
Derivative [Line Items]    
Contractual/Notional Amount 20,000 16,500
Assets    
Fair Value 361 114
Liabilities    
Fair Value 0 0
Net Fair Value, Asset (Liability) 361 114
Freestanding derivatives | Interest rate swaps - cleared    
Derivative [Line Items]    
Contractual/Notional Amount 3,695 2,485
Assets    
Fair Value 0 0
Liabilities    
Fair Value 0 0
Net Fair Value, Asset (Liability) 0 0
Freestanding derivatives | Interest rate futures    
Derivative [Line Items]    
Contractual/Notional Amount 19,195 21,874
Assets    
Fair Value 0 0
Liabilities    
Fair Value 0 0
Net Fair Value, Asset (Liability) 0 0
Freestanding derivatives | Total return swaps    
Derivative [Line Items]    
Contractual/Notional Amount 3,516 3,544
Assets    
Fair Value 69 22
Liabilities    
Fair Value 37 43
Net Fair Value, Asset (Liability) 32 (21)
Freestanding derivatives | Bond forwards    
Derivative [Line Items]    
Contractual/Notional Amount 8,284 8,143
Assets    
Fair Value 112 161
Liabilities    
Fair Value 89 78
Net Fair Value, Asset (Liability) 23 83
Embedded derivatives    
Assets    
Fair Value 0 0
Liabilities    
Fair Value 6,317 6,906
Net Fair Value, Asset (Liability) (6,317) (6,906)
Embedded derivatives | Fixed index annuity embedded derivatives    
Assets    
Fair Value 0 0
Liabilities    
Fair Value 818 863
Net Fair Value, Asset (Liability) (818) (863)
Embedded derivatives | Registered index linked annuity embedded derivatives    
Assets    
Fair Value 0 0
Liabilities    
Fair Value 5,499 6,043
Net Fair Value, Asset (Liability) (5,499) (6,043)
Derivatives related to funds withheld under reinsurance treaties    
Derivative [Line Items]    
Contractual/Notional Amount 912 1,291
Assets    
Fair Value 1,784 1,770
Liabilities    
Fair Value 12 22
Net Fair Value, Asset (Liability) 1,772 1,748
Derivatives related to funds withheld under reinsurance treaties | Cross-currency swaps    
Derivative [Line Items]    
Contractual/Notional Amount 158 158
Assets    
Fair Value 12 11
Liabilities    
Fair Value 0 1
Net Fair Value, Asset (Liability) 12 10
Derivatives related to funds withheld under reinsurance treaties | Cross-currency forwards    
Derivative [Line Items]    
Contractual/Notional Amount 754 1,133
Assets    
Fair Value 7 7
Liabilities    
Fair Value 12 21
Net Fair Value, Asset (Liability) (5) (14)
Derivatives related to funds withheld under reinsurance treaties | Funds withheld embedded derivative    
Assets    
Fair Value 1,765 1,752
Liabilities    
Fair Value 0 0
Net Fair Value, Asset (Liability) 1,765 1,752
Derivative assets    
Derivative [Line Items]    
Contractual/Notional Amount 102,406 99,121
Assets    
Fair Value 2,466 2,200
Derivative liabilities    
Liabilities    
Fair Value 6,555 7,163
Derivative    
Liabilities    
Net Fair Value, Asset (Liability) $ (4,089) $ (4,963)