v3.26.1
Fair Value Measurements (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Carrying value of investment $ 316   $ 316   $ 301
Exchange traded equity securities 14   14   12
Equity investments without readily determinable market value 17   17   17
Private Equity Investments          
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Carrying value of investment 234   234   220
Equity method investment (losses) income (5) $ 8 (1) $ 10  
Commitments for potential future investments 210   210    
Private Insurance and Consulting          
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Carrying value of investment 82   82   81
Equity Securities          
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Exchange traded equity securities $ 26   26   $ 24
Mark-to-market gains (losses) on other investments   $ (1) $ 2 $ 2  
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