v3.26.1
Financial Instruments - Additional Information (Details)
$ / shares in Units, $ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2026
USD ($)
$ / shares
shares
Mar. 31, 2025
USD ($)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Derivative [Line Items]        
Trade and other receivables $ 449   $ 500  
Debt securities interest income 117   105  
Net loss on equity method investment 21 $ 23    
Net loss on equity and other investments 1,061 1,021    
Klaviyo, Inc.        
Derivative [Line Items]        
Net loss on equity and other investments 54 86    
Equity Securities Without Readily Determinable Fair Value        
Derivative [Line Items]        
Equity and Other Investments $ 970 $ 709 $ 963 $ 717
Call Option | Klaviyo, Inc.        
Derivative [Line Items]        
Option to purchase series B common shares | shares 15,743,174      
Exercise price (in dollars per share) | $ / shares $ 88.93      
Discount for Lack of Marketability | Klaviyo, Inc.        
Derivative [Line Items]        
Derivative asset, measurement input 0.20   0.21  
Fair value $ 21   $ 75  
Foreign Exchange Forward        
Derivative [Line Items]        
Foreign exchange forward contracts, notional value 745   702  
Level 3 | Fair Value, Nonrecurring        
Derivative [Line Items]        
Equity and Other Investments 803      
Accrued interest        
Derivative [Line Items]        
Trade and other receivables $ 34   $ 39