v3.25.4
Goodwill and Specifically Identifiable Intangible Assets - Schedule of Intangible Assets by Reportable Segment (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Finite-Lived Intangible Assets [Line Items]    
Accumulated Amortization $ 301 $ 265
Intangible Assets, Net    
Gross Carrying Amount 712 712
Accumulated Amortization 301 265
Life Insurance    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 100 100
Accumulated Amortization 79 75
Intangible Assets, Net    
Accumulated Amortization 79 75
Group Protection | VOCRA    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 576 576
Accumulated Amortization 205 175
Intangible Assets, Net    
Accumulated Amortization 205 175
Group Protection | VODA    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 31 31
Accumulated Amortization 17 15
Intangible Assets, Net    
Accumulated Amortization 17 15
Retirement Plan Services    
Finite-Lived Intangible Assets [Line Items]    
Indefinite-lived intangible assets $ 5 $ 5