v3.25.4
Changes in Accumulated Other Comprehensive Losses (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning balance $ 153,157 $ 161,929 $ 160,242
Components of Other Comprehensive Income (Loss):      
Other Comprehensive Gain (Loss), Net of Tax 296 200 (162)
Ending balance 192,176 153,157 161,929
Income tax expense (benefit) 7,258 9,757 8,173
Total      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning balance (2,760) (2,960) (2,798)
Components of Other Comprehensive Income (Loss):      
Before Reclassifications 24 0 (401)
Reclassifications 272 200 239
Other Comprehensive Gain (Loss), Net of Tax 296 200 (162)
Ending balance (2,464) (2,760) (2,960)
Currency Translation Adjustments      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning balance (259) (192) (203)
Components of Other Comprehensive Income (Loss):      
Before Reclassifications 60 (67) 11
Reclassifications 0 0 0
Other Comprehensive Gain (Loss), Net of Tax 60 (67) 11
Ending balance (199) (259) (192)
Unrealized Holding Gains (Losses) on Securities      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning balance (19) (11) (12)
Components of Other Comprehensive Income (Loss):      
Before Reclassifications 15 (8) 1
Reclassifications 0 0 0
Other Comprehensive Gain (Loss), Net of Tax 15 (8) 1
Ending balance (4) (19) (11)
Derivatives      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning balance (14) 5 (12)
Components of Other Comprehensive Income (Loss):      
Before Reclassifications (5) (44) (16)
Reclassifications 27 25 33
Other Comprehensive Gain (Loss), Net of Tax 22 (19) 17
Ending balance 8 (14) 5
Defined Benefit Plans      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning balance (2,468) (2,762) (2,571)
Components of Other Comprehensive Income (Loss):      
Before Reclassifications (46) 119 (397)
Reclassifications 245 175 206
Other Comprehensive Gain (Loss), Net of Tax 199 294 (191)
Ending balance (2,269) $ (2,468) $ (2,762)
Defined Benefit Plans | Reclassification out of Accumulated Other Comprehensive Income      
Components of Other Comprehensive Income (Loss):      
Reclassification, before tax amount 325    
Income tax expense (benefit) $ 80