v3.26.3
Equity (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Equity beginning balance $ 68,116 $ 64,206 $ 67,102 $ 61,923
Tax benefit (expense) 10 20 51 (4)
Equity ending balance 70,964 66,359 70,964 66,359
Accumulated Other Comprehensive Loss        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Equity beginning balance (3,309) (2,391) (2,718) (3,755)
Other comprehensive income (loss) before reclassifications, net 24 (8) (540) 1,434
Amounts reclassified, pre-tax (33) (53) (101) (107)
Tax benefit (expense) 10 20 51 (4)
Equity ending balance (3,308) (2,432) (3,308) (2,432)
Foreign Currency Translation        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Equity beginning balance 116 414 492 (949)
Other comprehensive income (loss) before reclassifications, net 33 29 (319) 1,391
Amounts reclassified, pre-tax 0 (13) 0 (13)
Tax benefit (expense) 4 (1) (20) 0
Equity ending balance 153 429 153 429
Defined Benefit Pension and Postretirement Plans        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Equity beginning balance (3,323) (2,896) (3,304) (2,679)
Other comprehensive income (loss) before reclassifications, net (6) 20 11 (159)
Amounts reclassified, pre-tax (26) (32) (75) (109)
Tax benefit (expense) 6 7 19 46
Equity ending balance (3,349) (2,901) (3,349) (2,901)
Unrealized Hedging Gains (Losses)        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Equity beginning balance (102) 91 94 (127)
Other comprehensive income (loss) before reclassifications, net (3) (57) (232) 202
Amounts reclassified, pre-tax (7) (8) (26) 15
Tax benefit (expense) 0 14 52 (50)
Equity ending balance $ (112) $ 40 $ (112) $ 40