v3.26.3
Accumulated other comprehensive income (loss) - Schedule of Accumulated Other Comprehensive Income/Loss Net of Tax (Detail) - 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]        
Beginning balance $ 7,757 $ 6,834 $ 7,914 $ 5,380
Total other comprehensive income (loss) (90) (44) (164) 700
Ending balance 7,984 7,254 7,984 7,254
Foreign currency translation attributable to non-controlling interests     27  
Foreign currency translation adjustments        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Beginning balance     (2,152) (2,857)
Other comprehensive income (loss) before reclassifications     (131) 509
Amounts reclassified to the statements of income     0 0
Release of cumulative translation adjustments     (6) 181
Net other comprehensive income (loss) before tax     (137) 690
Corresponding income tax     (3) (45)
Total other comprehensive income (loss)     (140) 645
Ending balance (2,292) (2,212) (2,292) (2,212)
Derivative financial instruments        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Beginning balance     (199) (238)
Other comprehensive income (loss) before reclassifications     (35) 0
Amounts reclassified to the statements of income     13 30
Release of cumulative translation adjustments     0 0
Net other comprehensive income (loss) before tax     (23) 30
Corresponding income tax     0 0
Total other comprehensive income (loss)     (23) 30
Ending balance (222) (208) (222) (208)
Actuarial gains (losses) and prior service (costs) credits        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Beginning balance     (39) (52)
Other comprehensive income (loss) before reclassifications     0 0
Amounts reclassified to the statements of income     (2) (2)
Release of cumulative translation adjustments     0 0
Net other comprehensive income (loss) before tax     (2) (2)
Corresponding income tax     0 0
Total other comprehensive income (loss)     (2) (2)
Ending balance (41) (54) (41) (54)
Total        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Beginning balance (2,465) (2,431) (2,391) (3,148)
Other comprehensive income (loss) before reclassifications     (167) 509
Amounts reclassified to the statements of income     11 28
Release of cumulative translation adjustments     (6) 181
Net other comprehensive income (loss) before tax     (162) 718
Corresponding income tax     (3) (45)
Total other comprehensive income (loss)     (165) 673
Ending balance $ (2,556) $ (2,475) $ (2,556) $ (2,475)