v3.26.1
Financial instruments - Activity in level 3 financial assets (Details) - Level 3 - Financial investments - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Measured at FVOCI    
Changes in fair value measurement, assets [abstract]    
Balance as of January 1 $ 196 $ 201
Additions 37 15
Net losses recognized in Consolidated Statement of Comprehensive (Loss)/Income (56) (34)
Amortization 0 0
Settlements 0 (11)
Balance as of June 30 177 171
Measured at FVPL    
Changes in fair value measurement, assets [abstract]    
Balance as of January 1 5 2
Additions 21 2
Net losses recognized in Consolidated Statement of Comprehensive (Loss)/Income 0 0
Amortization (2) (1)
Settlements 0 0
Balance as of June 30 $ 24 $ 3