v3.26.1
Financial Instruments - Narrative (Details)
SFr in Millions, $ in Millions
6 Months Ended
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jul. 31, 2026
CHF (SFr)
Jun. 30, 2026
CHF (SFr)
Dec. 31, 2025
USD ($)
Dec. 31, 2025
CHF (SFr)
Derivative Instruments, Gain (Loss) [Line Items]            
Unrealized gain expected to be reclassified over the next 12 months $ 5          
Weighted Average            
Derivative Instruments, Gain (Loss) [Line Items]            
Effective interest rate 5.79%     5.79%    
Cross-currency fixed interest rate swap | Not Designated as Hedging Instrument            
Derivative Instruments, Gain (Loss) [Line Items]            
Notional amount $ 1,028       $ 1,090  
Cross-currency fixed interest rate swap | Designated as Hedging Instrument | Net Investment Hedging            
Derivative Instruments, Gain (Loss) [Line Items]            
Notional amount | SFr       SFr 1,000   SFr 1,000
Investment income interest 23 $ 22        
Cross-currency fixed interest rate swap | Designated as Hedging Instrument | Net Investment Hedging | Subsequent Event            
Derivative Instruments, Gain (Loss) [Line Items]            
Notional amount of derivative with maturity extended | SFr     SFr 200      
Interest rate swaps | Designated as Hedging Instrument            
Derivative Instruments, Gain (Loss) [Line Items]            
Notional amount 2,300       2,300  
Derivatives not yet effective $ 1,450       $ 850