v3.26.1
Changes in Accumulated Other Comprehensive Losses (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Accumulated Other Comprehensive Income (Loss) [Roll Forward]    
Beginning balance $ 192,176 $ 153,157
Components of Other Comprehensive Income (Loss):    
Other Comprehensive Gain (Loss), Net of Tax (129) 51
Ending balance 189,371 150,080
Related income taxes 1,653 2,071
Total    
Accumulated Other Comprehensive Income (Loss) [Roll Forward]    
Beginning balance (2,464) (2,760)
Components of Other Comprehensive Income (Loss):    
Before Reclassifications (145) 8
Reclassifications 16 43
Other Comprehensive Gain (Loss), Net of Tax (129) 51
Ending balance (2,593) (2,709)
Currency Translation Adjustment    
Accumulated Other Comprehensive Income (Loss) [Roll Forward]    
Beginning balance (199) (259)
Components of Other Comprehensive Income (Loss):    
Before Reclassifications (18) 16
Reclassifications 0 0
Other Comprehensive Gain (Loss), Net of Tax (18) 16
Ending balance (217) (243)
Unrealized Holding Gains (Losses) on Securities    
Accumulated Other Comprehensive Income (Loss) [Roll Forward]    
Beginning balance (4) (19)
Components of Other Comprehensive Income (Loss):    
Before Reclassifications (1) 5
Reclassifications 0 0
Other Comprehensive Gain (Loss), Net of Tax (1) 5
Ending balance (5) (14)
Derivatives    
Accumulated Other Comprehensive Income (Loss) [Roll Forward]    
Beginning balance 8 (14)
Components of Other Comprehensive Income (Loss):    
Before Reclassifications (117) (21)
Reclassifications (10) 17
Other Comprehensive Gain (Loss), Net of Tax (127) (4)
Ending balance (119) (18)
Defined Benefit Plans    
Accumulated Other Comprehensive Income (Loss) [Roll Forward]    
Beginning balance (2,269) (2,468)
Components of Other Comprehensive Income (Loss):    
Before Reclassifications (9) 8
Reclassifications 26 26
Other Comprehensive Gain (Loss), Net of Tax 17 34
Ending balance (2,252) $ (2,434)
Defined Benefit Plans | Reclassification out of Accumulated Other Comprehensive Income    
Components of Other Comprehensive Income (Loss):    
Employee benefits for reclassified components 35  
Related income taxes $ 9