v3.25.4
Stockholders' Equity and Noncontrolling Interests - Accumulated Other Comprehensive Loss (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]      
Balance at beginning of period $ 65,590 $ 68,189 $ 71,927
Other comprehensive income (loss), net of tax 953 (1,137) (2,355)
Balance at end of period 63,168 65,590 68,189
Foreign Currency Translation Adjustments      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Balance at beginning of period (3,630) (2,457) (2,776)
Other comprehensive income (loss), net of tax 353 (1,173) 319
Balance at end of period (3,277) (3,630) (2,457)
Defined Benefit Plans      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Balance at beginning of period (7,669) (7,665) (4,851)
Other comprehensive loss and noncontrolling interests before reclassification adjustment 334 (207) (3,706)
Tax benefit (expense) (83) (91) 838
Other comprehensive loss and noncontrolling interests before reclassification adjustment, net of tax 251 (298) (2,868)
Reclassification adjustment, net of tax 88 294 54
Other comprehensive income (loss), net of tax 339 (4) (2,814)
Balance at end of period (7,330) (7,669) (7,665)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Balance at beginning of period 86 (20) (21)
Other comprehensive loss and noncontrolling interests before reclassification adjustment, net of tax 899 (313) 101
Reclassification adjustment, net of tax (759) 420 (99)
Other comprehensive income (loss), net of tax 140 106 1
Balance at end of period $ 226 $ 86 $ (20)