v3.26.1
Fair Value Measurements (excluding Consolidated Investment Entities) - Level 3 Financial Instruments (Details) - Level 3 - Measured at fair value on a recurring basis - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Managed custody guarantees    
Derivatives Rollforward:    
Fair Value, Derivatives, beginning balance $ (5)  
Gains (losses) from standalone derivatives recognized in Net gains (losses) (2)  
Total Realized/Unrealized Gains (Losses) Included in OCI 0  
Purchases 0  
Issuances 0  
Sales 0  
Settlements 0  
Transfers in to Level 3 0  
Transfers out of Level 3 0  
Change In Unrealized Gains (Losses) Included in Earnings 0  
Change In Unrealized Gains (Losses) Included in OCI 0  
Embedded derivatives within reinsurance    
Derivatives Rollforward:    
Fair Value, Derivatives, beginning balance   $ (53)
Gains (losses) from standalone derivatives recognized in Net gains (losses) 0 1
Total Realized/Unrealized Gains (Losses) Included in OCI   0
Purchases   0
Issuances   0
Sales   0
Settlements   0
Transfers in to Level 3   0
Transfers out of Level 3   0
Fair Value, Derivatives, ending balance   (52)
Change In Unrealized Gains (Losses) Included in Earnings   0
Change In Unrealized Gains (Losses) Included in OCI   0
Short-term investments and cash equivalents    
Derivatives Rollforward:    
Fair Value, Derivatives, beginning balance   23
Gains (losses) from standalone derivatives recognized in Net gains (losses)   0
Total Realized/Unrealized Gains (Losses) Included in OCI   1
Purchases   0
Issuances   0
Sales   0
Settlements   0
Transfers in to Level 3   0
Transfers out of Level 3   0
Fair Value, Derivatives, ending balance   24
Change In Unrealized Gains (Losses) Included in Earnings   0
Change In Unrealized Gains (Losses) Included in OCI   1
Fixed maturities    
Assets Rollforward:    
Fair Value, Assets, beginning balance 3,239 2,127
Total Realized/Unrealized Gains (Losses) Included in Net income (6) (24)
Total Realized/Unrealized Gains (Losses) Included in OCI (34) 49
Purchases 496 375
Issuances 0 0
Sales (43) (18)
Settlements (123) (30)
Transfers in to Level 3 120 0
Transfers out of Level 3 (74) (16)
Fair Value, Assets, ending balance 3,575 2,463
Change In Unrealized Gains (Losses) Included in Earnings (2) (22)
Derivatives Rollforward:    
Change In Unrealized Gains (Losses) Included in OCI (35) 47
U.S. corporate public securities    
Assets Rollforward:    
Fair Value, Assets, beginning balance 78 59
Total Realized/Unrealized Gains (Losses) Included in Net income 0 (1)
Total Realized/Unrealized Gains (Losses) Included in OCI (1) 2
Purchases 0 1
Issuances 0 0
Sales 0 (11)
Settlements 0 0
Transfers in to Level 3 0 0
Transfers out of Level 3 0 (2)
Fair Value, Assets, ending balance 77 48
Change In Unrealized Gains (Losses) Included in Earnings 0 0
Derivatives Rollforward:    
Change In Unrealized Gains (Losses) Included in OCI (1) 0
U.S. corporate private securities    
Assets Rollforward:    
Fair Value, Assets, beginning balance 2,100 1,497
Total Realized/Unrealized Gains (Losses) Included in Net income (3) (1)
Total Realized/Unrealized Gains (Losses) Included in OCI (27) 19
Purchases 283 194
Issuances 0 0
Sales (41) (7)
Settlements (101) (25)
Transfers in to Level 3 120 0
Transfers out of Level 3 (25) 0
Fair Value, Assets, ending balance 2,306 1,677
Change In Unrealized Gains (Losses) Included in Earnings 0 0
Derivatives Rollforward:    
Change In Unrealized Gains (Losses) Included in OCI (27) 19
Foreign corporate public securities and foreign governments    
Assets Rollforward:    
Fair Value, Assets, beginning balance 60 60
Total Realized/Unrealized Gains (Losses) Included in Net income 0 0
Total Realized/Unrealized Gains (Losses) Included in OCI (1) (1)
Purchases 0 0
Issuances 0 0
Sales 0 0
Settlements 0 0
Transfers in to Level 3 0 0
Transfers out of Level 3 0 0
Fair Value, Assets, ending balance 59 59
Change In Unrealized Gains (Losses) Included in Earnings 0 0
Derivatives Rollforward:    
Change In Unrealized Gains (Losses) Included in OCI (1) (1)
Foreign corporate private securities    
Assets Rollforward:    
Fair Value, Assets, beginning balance 631 421
Total Realized/Unrealized Gains (Losses) Included in Net income (1) (19)
Total Realized/Unrealized Gains (Losses) Included in OCI (6) 29
Purchases 124 161
Issuances 0 0
Sales 0 0
Settlements (8) (2)
Transfers in to Level 3 0 0
Transfers out of Level 3 0 0
Fair Value, Assets, ending balance 740 590
Change In Unrealized Gains (Losses) Included in Earnings 0 (19)
Derivatives Rollforward:    
Change In Unrealized Gains (Losses) Included in OCI (7) 29
Residential mortgage-backed securities    
Assets Rollforward:    
Fair Value, Assets, beginning balance 71 67
Total Realized/Unrealized Gains (Losses) Included in Net income (2) (3)
Total Realized/Unrealized Gains (Losses) Included in OCI 0 0
Purchases 11 16
Issuances 0 0
Sales 0 0
Settlements 0 0
Transfers in to Level 3 0 0
Transfers out of Level 3 (5) (10)
Fair Value, Assets, ending balance 75 70
Change In Unrealized Gains (Losses) Included in Earnings (2) (3)
Derivatives Rollforward:    
Change In Unrealized Gains (Losses) Included in OCI 0 0
Other asset-backed securities    
Assets Rollforward:    
Fair Value, Assets, beginning balance 299 23
Total Realized/Unrealized Gains (Losses) Included in Net income 0 0
Total Realized/Unrealized Gains (Losses) Included in OCI 1 0
Purchases 78 3
Issuances 0 0
Sales (2) 0
Settlements (14) (3)
Transfers in to Level 3 0 0
Transfers out of Level 3 (44) (4)
Fair Value, Assets, ending balance 318 19
Change In Unrealized Gains (Losses) Included in Earnings 0 0
Derivatives Rollforward:    
Change In Unrealized Gains (Losses) Included in OCI 1 0
Equity securities, at fair value    
Assets Rollforward:    
Fair Value, Assets, beginning balance 94 98
Total Realized/Unrealized Gains (Losses) Included in Net income 0 3
Total Realized/Unrealized Gains (Losses) Included in OCI 0 0
Purchases 0 9
Issuances 0 0
Sales (11) 0
Settlements 0 0
Transfers in to Level 3 0 0
Transfers out of Level 3 0 0
Fair Value, Assets, ending balance 83 110
Change In Unrealized Gains (Losses) Included in Earnings 0 3
Derivatives Rollforward:    
Change In Unrealized Gains (Losses) Included in OCI 0 0
Contingent Consideration    
Liabilities Rollforward:    
Fair Value, Liabilities, Ending Balance (147) (2)
Total Realized/Unrealized Gains (Losses) Included in Net income (4) (2)
Total Realized/Unrealized Gains (Losses) Included in OCI 0 0
Purchases 0 0
Issuances 0 (149)
Sales 0 0

Settlements 129 1
Transfers into Level 3 0 0
Transfers out of Level 3 0 0
Fair Value, Liabilities, Ending Balance (22) (152)
Change In Unrealized Gains (Losses) Included in Earnings 0 0
Derivatives Rollforward:    
Change In Unrealized Gains (Losses) Included in OCI 0 0
Managed custody guarantees    
Liabilities Rollforward:    
Fair Value, Liabilities, Ending Balance   (19)
Total Realized/Unrealized Gains (Losses) Included in Net income   3
Total Realized/Unrealized Gains (Losses) Included in OCI   0
Purchases   0
Issuances   0
Sales   0

Settlements   0
Transfers into Level 3   0
Transfers out of Level 3   0
Fair Value, Liabilities, Ending Balance (7) (16)
Change In Unrealized Gains (Losses) Included in Earnings   0
Derivatives Rollforward:    
Change In Unrealized Gains (Losses) Included in OCI   0
Assets held in separate accounts    
Assets Rollforward:    
Fair Value, Assets, beginning balance 388 340
Total Realized/Unrealized Gains (Losses) Included in Net income (4) 4
Total Realized/Unrealized Gains (Losses) Included in OCI 0 0
Purchases 38 8
Issuances 0 0
Sales (7) (14)
Settlements 0 0
Transfers in to Level 3 12 0
Transfers out of Level 3 (1) 0
Fair Value, Assets, ending balance 426 338
Change In Unrealized Gains (Losses) Included in Earnings 0 0
Derivatives Rollforward:    
Change In Unrealized Gains (Losses) Included in OCI $ 0 $ 0