v3.25.4
Equity Activity - AOCI Rollforward (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Sep. 30, 2024
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Balance at the beginning of the period   $ 27,393 $ 22,613 $ 22,021
Balance at the end of the period   32,740 27,393 22,613
Pension settlement charges $ 2,700 0 3,113 0
Pension settlement charge, net of tax $ 2,000   2,400  
Accumulated Other Comprehensive Income/(Loss)        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Balance at the beginning of the period   (15,269) (18,761) (16,740)
Other comprehensive income before reclassifications   (630) 215 (2,331)
Amount reclassified from accumulated other comprehensive income   185 3,278 310
Other comprehensive income/(loss)   (445) 3,492 (2,021)
Balance at the end of the period   (15,713) (15,269) (18,761)
Foreign Currency Translation Adjustments        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Balance at the beginning of the period   (3,512) (3,488) (3,591)
Other comprehensive income before reclassifications   (445) (23) 103
Other comprehensive income/(loss)   (445) (23) 103
Balance at the end of the period   (3,956) (3,512) (3,488)
Net Unrealized Gains/(Losses) on Available- For-Sale Securities        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Balance at the beginning of the period   0 (1) (1)
Other comprehensive income before reclassifications   (1) 1 0
Other comprehensive income/(loss)   (1) 1 0
Balance at the end of the period   0 0 (1)
Net Unrealized Gains/(Losses) on Cash Flow Hedges        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Balance at the beginning of the period   237 (106) (135)
Other comprehensive income before reclassifications   (58) 276 144
Amount reclassified from accumulated other comprehensive income   (336) 67 (115)
Other comprehensive income/(loss)   (394) 343 28
Balance at the end of the period   (157) 237 (106)
Net Change Retirement- Related Benefit Plans        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Balance at the beginning of the period   (11,994) (15,165) (13,013)
Other comprehensive income before reclassifications   (127) (39) (2,577)
Amount reclassified from accumulated other comprehensive income   521 3,210 425
Other comprehensive income/(loss)   394 3,171 (2,152)
Balance at the end of the period   $ (11,600) $ (11,994) $ (15,165)