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 $ 3,785  
Increase in provisions recognized in the income statement 1,046  
Release of provisions recognized in the income statement (212)  
Provisions used in conformity with designated purpose (1,104)  
Reclassifications 134  
Foreign currency translation and other movements (4)  
Balance as of 30 June 2026 3,645  
Litigation, regulatory and similar matters    
Disclosure Of Other Provisions [Line Items]    
Balance as of 31 December 2025 2,200  
Increase in provisions recognized in the income statement 181  
Release of provisions recognized in the income statement (87)  
Provisions used in conformity with designated purpose (454)  
Reclassifications 134  
Foreign currency translation and other movements (9)  
Balance as of 30 June 2026 1,964  
Restructuring    
Disclosure Of Other Provisions [Line Items]    
Balance as of 31 December 2025 891  
Increase in provisions recognized in the income statement 807  
Release of provisions recognized in the income statement (76)  
Provisions used in conformity with designated purpose (587)  
Reclassifications 0  
Foreign currency translation and other movements (15)  
Balance as of 30 June 2026 1,020  
Personnel-related restructuring provisions 651 $ 493
Provisions for onerous contracts related to real estate 226 270
Provisions for onerous contracts related to technology 97 $ 128
Real estate    
Disclosure Of Other Provisions [Line Items]    
Balance as of 31 December 2025 245  
Increase in provisions recognized in the income statement 4  
Release of provisions recognized in the income statement (12)  
Provisions used in conformity with designated purpose (8)  
Reclassifications 0  
Foreign currency translation and other movements 1  
Balance as of 30 June 2026 229  
Other    
Disclosure Of Other Provisions [Line Items]    
Balance as of 31 December 2025 449  
Increase in provisions recognized in the income statement 54  
Release of provisions recognized in the income statement (36)  
Provisions used in conformity with designated purpose (55)  
Reclassifications 0  
Foreign currency translation and other movements 20  
Balance as of 30 June 2026 $ 432