v3.26.1
Fair Value Measurements (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Carrying value of investment $ 324   $ 301
Exchange traded equity securities 13   12
Equity investments without readily determinable market value 16   17
Private Equity Investments      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Carrying value of investment 237   220
Equity method investment income 4 $ 2  
Commitments for potential future investments 102    
Private Insurance and Consulting      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Carrying value of investment 87   81
Equity Securities      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Exchange traded equity securities 26   $ 24
Mark-to-market gains on other investments $ 2 $ 3  
Minimum      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Revenue target period (in years) 2 years 2 years  
Maximum      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Revenue target period (in years) 4 years 4 years