v3.26.1
Other Comprehensive Income (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Other comprehensive income (loss) before reclassifications $ (237) $ (593)
Amounts reclassified from accumulated OCI (295) (344)
Net other comprehensive income (loss) (532) (937)
Accumulated Other Comprehensive Income (Loss)    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Accumulated other comprehensive income, beginning balance (860) 795
Net other comprehensive income (loss) (532) (937)
Accumulated other comprehensive income, ending balance (1,392) (142)
Foreign Currency Translation Adjustment    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Accumulated other comprehensive income, beginning balance (1,401) (1,755)
Other comprehensive income (loss) before reclassifications 34 21
Amounts reclassified from accumulated OCI 0 0
Net other comprehensive income (loss) 34 21
Accumulated other comprehensive income, ending balance (1,367) (1,734)
Net Unrealized Gains (Losses) on Securities    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Accumulated other comprehensive income, beginning balance (28) (46)
Other comprehensive income (loss) before reclassifications (1) 10
Amounts reclassified from accumulated OCI 0 1
Net other comprehensive income (loss) (1) 11
Accumulated other comprehensive income, ending balance (29) (35)
Net Unrealized Gains (Losses) on Derivative Instruments    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Accumulated other comprehensive income, beginning balance (1,209) (604)
Other comprehensive income (loss) before reclassifications (270) (624)
Amounts reclassified from accumulated OCI 11 11
Net other comprehensive income (loss) (259) (613)
Accumulated other comprehensive income, ending balance (1,468) (1,217)
Defined Benefit Postretirement Plans    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Accumulated other comprehensive income, beginning balance 1,778 3,200
Other comprehensive income (loss) before reclassifications 0 0
Amounts reclassified from accumulated OCI (306) (356)
Net other comprehensive income (loss) (306) (356)
Accumulated other comprehensive income, ending balance $ 1,472 $ 2,844