v3.25.4
Investments in debt and equity securities - Available-for-sale debt securities in an unrealized loss position (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Less than 12 months    
Fair Value $ 177 $ 875
Unrealized Losses 0 6
12 months or more    
Fair Value 763 1,290
Unrealized Losses 26 75
Total - Fair Value 940 2,165
Total - Unrealized losses 26 81
Other U.S. and non-U.S. government bonds    
Less than 12 months    
Fair Value 0 0
Unrealized Losses 0 0
12 months or more    
Fair Value 17 55
Unrealized Losses 0 4
Total - Fair Value 17 55
Total - Unrealized losses 0 4
Corporate bonds and other debt securities    
Less than 12 months    
Fair Value 130 729
Unrealized Losses 0 3
12 months or more    
Fair Value 306 812
Unrealized Losses 6 33
Total - Fair Value 436 1,541
Total - Unrealized losses 6 36
Asset-backed securities    
Less than 12 months    
Fair Value 38 7
Unrealized Losses 0 0
12 months or more    
Fair Value 43 37
Unrealized Losses 1 2
Total - Fair Value 81 44
Total - Unrealized losses 1 2
U.S. governmental agency    
Less than 12 months    
Fair Value 3 126
Unrealized Losses 0 3
12 months or more    
Fair Value 307 273
Unrealized Losses 15 30
Total - Fair Value 310 399
Total - Unrealized losses 15 33
Residential    
Less than 12 months    
Fair Value 0  
Unrealized Losses 0  
12 months or more    
Fair Value 1  
Unrealized Losses 1  
Total - Fair Value 1  
Total - Unrealized losses 1  
Commercial    
Less than 12 months    
Fair Value 6 13
Unrealized Losses 0 0
12 months or more    
Fair Value 89 113
Unrealized Losses 3 6
Total - Fair Value 95 126
Total - Unrealized losses $ 3 $ 6