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Financial Instruments - Narrative (Details)
SFr in Millions, $ in Millions, € in Billions, ¥ in Billions
3 Months Ended
Mar. 31, 2026
USD ($)
derivative
Mar. 31, 2025
USD ($)
Mar. 31, 2026
EUR (€)
Mar. 31, 2026
CNY (¥)
Mar. 31, 2026
CHF (SFr)
Dec. 31, 2025
USD ($)
Derivative [Line Items]            
Different types of derivatives, number | derivative 3          
Notional value $ 13,539         $ 13,653
Gain on exchange rate movements (6,291)         (6,353)
Designated as Hedging Instrument            
Derivative [Line Items]            
Notional value 3,712         $ 3,980
Net Investment Hedging            
Derivative [Line Items]            
Cumulative deferred gain 1,228          
Derivative deferred gain (loss) 330          
Net Investment Hedging | Line of Credit            
Derivative [Line Items]            
Cumulative deferred gain 45          
Derivative deferred gain (loss) 63          
Forward exchange contracts, net interest income 18 $ 8        
Net Investment Hedging | Designated as Hedging Instrument            
Derivative [Line Items]            
Gain on exchange rate movements 91          
Net Investment Hedging | Designated as Hedging Instrument | Intercompany Loans            
Derivative [Line Items]            
Euro-denominated notes and intercompany loans 20,000   € 17.3      
CNY-denominated intercompany loans 800     ¥ 5.2    
CHF-denominated intercompany loans 625       SFr 500  
Credit Default Swap            
Derivative [Line Items]            
Notional value $ 74          
Maximum | Credit Default Swap            
Derivative [Line Items]            
Derivative term 22 months          
Maximum | Forecasted Transactions            
Derivative [Line Items]            
Derivative term 4 years          
Maximum | Commodity contracts            
Derivative [Line Items]            
Derivative term 3 years          
Credit Default Swap            
Derivative [Line Items]            
Notional value $ 42          
Credit Default Swap | Maximum            
Derivative [Line Items]            
Derivative term 24 months