v3.26.3
Accumulated Other Comprehensive Loss (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Jun. 30, 2026
Mar. 31, 2026
Sep. 30, 2025
Jun. 30, 2025
Mar. 31, 2025
Sep. 30, 2026
Sep. 30, 2025
Accumulated Other Comprehensive Income (Loss) [Roll Forward]                
Balance $ 10,424 $ 10,980 $ 11,491 $ 11,081 $ 10,822 $ 10,647 $ 11,491 $ 10,647
Foreign currency translation adjustment (24)     (6)     (71) 87
Tax on foreign currency translation adjustment (7)     0     1 (8)
Foreign currency translation adjustment 1     1     3 (2)
Balance 10,272 10,424 10,980 11,219 11,081 10,822 10,272 11,219
Total                
Accumulated Other Comprehensive Income (Loss) [Roll Forward]                
Balance (302) (229) (220) (222) (337) (435) (220) (435)
Foreign currency translation adjustment (24) (53) 16 (6) 37 56    
Amount of gain recognized relating to divestiture of foreign subsidiaries reclassified into net income   (3)            
Amount of currency translation adjustment relating to divestiture of foreign subsidiaries reclassified into net income 7 (13) 5     8    
Other Comprehensive Income (Loss) before Reclassifications, Tax (11) 3 18          
Unrealized loss on derivative hedge agreements 2 4 (8) 1 15 15    
Foreign currency translation adjustment for post-retirement benefit plans       1   (1)    
Foreign currency translation adjustment for post-retirement benefit plans         (2)      
Foreign currency translation adjustment 1 2     1      
Unrealized loss on derivative hedge agreements   1 2          
Balance (307) (302) (229) (233) (222) (337) (307) (233)
Foreign Currency Translation                
Accumulated Other Comprehensive Income (Loss) [Roll Forward]                
Balance (257) (188) (191) (182) (284) (368) (191) (368)
Foreign currency translation adjustment (24) (53) 16 (6) 37 56    
Amount of currency translation adjustment relating to divestiture of foreign subsidiaries reclassified into net income 7 (13) 5     8    
Other Comprehensive Income (Loss) before Reclassifications, Tax (11) 3 18 3 (65) (20)    
Balance (263) (257) (188) (191) (182) (284) (263) (191)
Postretirement Benefit Plans                
Accumulated Other Comprehensive Income (Loss) [Roll Forward]                
Balance (40) (40) (39) (55) (54) (53) (39) (53)
Amount of gain recognized relating to divestiture of foreign subsidiaries reclassified into net income   (3)            
Foreign currency translation adjustment for post-retirement benefit plans       1   (1)    
Foreign currency translation adjustment for post-retirement benefit plans         (2)      
Foreign currency translation adjustment 1 2     1      
Balance (39) (40) (40) (54) (55) (54) (39) (54)
Derivative Instruments                
Accumulated Other Comprehensive Income (Loss) [Roll Forward]                
Balance (5) (1) 10 15 1 (14) 10 (14)
Other Comprehensive Income (Loss) before Reclassifications, Tax       1 (2) 2    
Unrealized loss on derivative hedge agreements 2 4 (8) 1 15 15    
Unrealized loss on derivative hedge agreements   1 2     0    
Balance (5) (5) (1) 12 15 1 $ (5) $ 12
Location, Statement of Income, Balance [Axis]: us-gaap:CostOfRevenue | Total                
Accumulated Other Comprehensive Income (Loss) [Roll Forward]                
Tax on foreign currency translation adjustment (1)              
Reclassification of unrealized gain on foreign exchange agreements into cost of revenue   (2) (2) (2) (1) (1)    
Location, Statement of Income, Balance [Axis]: us-gaap:CostOfRevenue | Derivative Instruments                
Accumulated Other Comprehensive Income (Loss) [Roll Forward]                
Tax on foreign currency translation adjustment (1)              
Reclassification of unrealized gain on foreign exchange agreements into cost of revenue   (2) (2) (2) (1) (1)    
Location, Statement of Income, Balance [Axis]: us-gaap:OtherNonoperatingIncomeExpense | Total                
Accumulated Other Comprehensive Income (Loss) [Roll Forward]                
Amortization of prior service credit   1 (1)          
Location, Statement of Income, Balance [Axis]: us-gaap:OtherNonoperatingIncomeExpense | Postretirement Benefit Plans                
Accumulated Other Comprehensive Income (Loss) [Roll Forward]                
Amortization of prior service credit   1 (1)          
Location, Statement of Income, Balance [Axis]: us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax | Total                
Accumulated Other Comprehensive Income (Loss) [Roll Forward]                
Tax on foreign currency translation adjustment 3 1   (3) 2      
Reclassification of unrealized gain on foreign exchange agreements into cost of revenue     (3)     3    
Location, Statement of Income, Balance [Axis]: us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax | Derivative Instruments                
Accumulated Other Comprehensive Income (Loss) [Roll Forward]                
Tax on foreign currency translation adjustment $ 3 $ 1            
Reclassification of unrealized gain on foreign exchange agreements into cost of revenue     $ (3) $ (3) $ 2 $ 3