Annual report [Section 13 and 15(d), not S-K Item 405]

Summary of Significant Accounting Policies (Property, Plant and Equipment) (Details)

v3.25.4
Summary of Significant Accounting Policies (Property, Plant and Equipment) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Property, Plant and Equipment [Line Items]      
Property and equipment, net $ 104 $ 94  
Depreciation expense 35 44 $ 49
Software and Software Development Costs      
Property, Plant and Equipment [Line Items]      
Property and equipment, net 53 50  
Depreciation expense $ 32 $ 36 $ 40
Building      
Property, Plant and Equipment [Line Items]      
Useful life 30 years    
Building improvements      
Property, Plant and Equipment [Line Items]      
Useful life 15 years    
Leasehold Improvements      
Property, Plant and Equipment [Line Items]      
Useful life 20 years    
Minimum | Furniture, fixtures and equipment      
Property, Plant and Equipment [Line Items]      
Useful life 3 years    
Minimum | Software and Software Development Costs      
Property, Plant and Equipment [Line Items]      
Useful life 3 years    
Maximum | Furniture, fixtures and equipment      
Property, Plant and Equipment [Line Items]      
Useful life 7 years    
Maximum | Software and Software Development Costs      
Property, Plant and Equipment [Line Items]      
Useful life 5 years