v3.26.3
Accumulated Other Comprehensive Income (Loss) - Schedule of Components of Accumulated Other Comprehensive Loss in the Equity Section of the Balance Sheet (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning Balance $ 65,349 $ 65,572 $ 64,487 $ 64,796
Other comprehensive income (loss) 22 (172) (243) 399
Ending Balance 65,991 64,923 65,991 64,923
Defined Benefit Plans        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning Balance     (335)  
Other comprehensive income (loss)     40  
Ending Balance (295)   (295)  
Unrealized Holding Gain/(Loss) on Securities        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning Balance     8  
Other comprehensive income (loss)     (20)  
Ending Balance (12)   (12)  
Foreign Currency Translation        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning Balance     (5,602)  
Other comprehensive income (loss)     (263)  
Ending Balance (5,865)   (5,865)  
Unrealized Gain/(Loss) on Hedging Activities        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning Balance     18  
Other comprehensive income (loss)     0  
Ending Balance 18   18  
Accum. Other Comprehensive Income (Loss)        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning Balance (6,176) (5,902) (5,911) (6,473)
Other comprehensive income (loss) 22 (172) (243) 399
Ending Balance $ (6,154) $ (6,074) $ (6,154) $ (6,074)