v3.25.4
Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Accumulated Other Comprehensive Income (Loss) [Roll Forward]      
Beginning balance $ 46,372 $ 37,635 $ 46,058
Other comprehensive income (loss), net of taxes 658 216 (393)
Ending balance 52,662 46,372 37,635
Derivatives      
Accumulated Other Comprehensive Income (Loss) [Roll Forward]      
Beginning balance 242 (24) 73
Other comprehensive income (loss) before reclassification adjustments, pretax (577) 508 114
Tax 124 (109) (24)
Other comprehensive income (loss) before reclassification adjustments, net of taxes (453) 399 90
Reclassification adjustments, pretax 134 (168) (237)
Tax (28) 35 50
Reclassification adjustments, net of taxes 106 (133) (187)
Other comprehensive income (loss), net of taxes (347) 266 (97)
Ending balance (105) 242 (24)
Employee Benefit Plans      
Accumulated Other Comprehensive Income (Loss) [Roll Forward]      
Beginning balance (2,327) (2,793) (2,408)
Other comprehensive income (loss) before reclassification adjustments, pretax 1,101 647 (413)
Tax (232) (138) 86
Other comprehensive income (loss) before reclassification adjustments, net of taxes 869 509 (327)
Reclassification adjustments, pretax (53) (60) (64)
Tax 12 17 6
Reclassification adjustments, net of taxes (41) (43) (58)
Other comprehensive income (loss), net of taxes 828 466 (385)
Ending balance (1,499) (2,327) (2,793)
Pension Plan Net Loss      
Accumulated Other Comprehensive Income (Loss) [Roll Forward]      
Pension and other postretirement benefit plans, net loss (gain) and prior service (credit) included in AOCI 2,000 3,000  
Other Postretirement Benefit Plan Net Gain      
Accumulated Other Comprehensive Income (Loss) [Roll Forward]      
Pension and other postretirement benefit plans, net loss (gain) and prior service (credit) included in AOCI (365) (400)  
Pension Plan Prior Service Credit      
Accumulated Other Comprehensive Income (Loss) [Roll Forward]      
Pension and other postretirement benefit plans, net loss (gain) and prior service (credit) included in AOCI (146) (174)  
Other Postretirement Benefit Plan Prior Service Credit      
Accumulated Other Comprehensive Income (Loss) [Roll Forward]      
Pension and other postretirement benefit plans, net loss (gain) and prior service (credit) included in AOCI (29) (61)  
Foreign Currency Translation Adjustment      
Accumulated Other Comprehensive Income (Loss) [Roll Forward]      
Beginning balance (2,860) (2,344) (2,433)
Other comprehensive income (loss) before reclassification adjustments, pretax 254 (559) 17
Tax (77) 23 63
Other comprehensive income (loss) before reclassification adjustments, net of taxes 177 (536) 80
Reclassification adjustments, pretax 0 20 9
Tax 0 0 0
Reclassification adjustments, net of taxes 0 20 9
Other comprehensive income (loss), net of taxes 177 (516) 89
Ending balance (2,683) (2,860) (2,344)
Accumulated Other Comprehensive Loss      
Accumulated Other Comprehensive Income (Loss) [Roll Forward]      
Beginning balance (4,945) (5,161) (4,768)
Other comprehensive income (loss) before reclassification adjustments, pretax 778 596 (282)
Tax (185) (224) 125
Other comprehensive income (loss) before reclassification adjustments, net of taxes 593 372 (157)
Reclassification adjustments, pretax 81 (208) (292)
Tax (16) 52 56
Reclassification adjustments, net of taxes 65 (156) (236)
Other comprehensive income (loss), net of taxes 658 216 (393)
Ending balance $ (4,287) $ (4,945) $ (5,161)