v3.26.1
Provisions - additional information (Detail) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Disclosure Of Other Provisions [Line Items]    
Balance as of 31 December 2025 $ 3,217  
Increase in provisions recognized in the income statement 843  
Release of provisions recognized in the income statement (157)  
Provisions used in conformity with designated purpose (818)  
Foreign currency translation and other movements 13  
Balance as of 30 June 2026 3,098  
Litigation, regulatory and similar matters    
Disclosure Of Other Provisions [Line Items]    
Balance as of 31 December 2025 2,109  
Increase in provisions recognized in the income statement 326  
Release of provisions recognized in the income statement (61)  
Provisions used in conformity with designated purpose (451)  
Foreign currency translation and other movements 12  
Balance as of 30 June 2026 1,935  
Restructuring    
Disclosure Of Other Provisions [Line Items]    
Balance as of 31 December 2025 560  
Increase in provisions recognized in the income statement 462  
Release of provisions recognized in the income statement (54)  
Provisions used in conformity with designated purpose (329)  
Foreign currency translation and other movements (10)  
Balance as of 30 June 2026 628  
Personnel-related restructuring provisions 357 $ 282
Provisions for onerous contracts related to real estate 186 229
Provisions for onerous contracts related to technology 40 $ 48
Real estate    
Disclosure Of Other Provisions [Line Items]    
Balance as of 31 December 2025 229  
Increase in provisions recognized in the income statement 4  
Release of provisions recognized in the income statement (10)  
Provisions used in conformity with designated purpose (8)  
Foreign currency translation and other movements (9)  
Balance as of 30 June 2026 205  
Other    
Disclosure Of Other Provisions [Line Items]    
Balance as of 31 December 2025 319  
Increase in provisions recognized in the income statement 51  
Release of provisions recognized in the income statement (32)  
Provisions used in conformity with designated purpose (29)  
Foreign currency translation and other movements 20  
Balance as of 30 June 2026 $ 329