v3.25.4
Retirement Benefits (Reconciliation of Net Actuarial Loss) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Changes in plan assets and benefit obligations recognized in other comprehensive income (loss):      
Total amount recognized as change in plan assets and benefit obligations $ 389 $ 400 $ 503
Pension  Benefits      
Recognized as component of net benefit (credit) cost:      
Recognized actuarial loss (gain) 42 31 22
Net benefit (credit) cost (168) (240) (214)
Post-retirement Benefits      
Recognized as component of net benefit (credit) cost:      
Recognized actuarial loss (gain) (1) (6) (3)
Net benefit (credit) cost 2 (5) (2)
U.S. | Pension  Benefits      
Reconciliation of unrecognized net actuarial gain loss [Roll Forward]      
Beginning balance (1,427) (1,347)  
Recognized as component of net benefit (credit) cost:      
Recognized actuarial loss (gain) 24 21 19
Net benefit (credit) cost (14) (32) (32)
Changes in plan assets and benefit obligations recognized in other comprehensive income (loss):      
Liability experience (63) 107  
Asset experience 30 (208)  
Total amount recognized as change in plan assets and benefit obligations (33) (101)  
Ending balance (1,436) (1,427) (1,347)
U.S. | Post-retirement Benefits      
Reconciliation of unrecognized net actuarial gain loss [Roll Forward]      
Beginning balance 2 4  
Recognized as component of net benefit (credit) cost:      
Recognized actuarial loss (gain) 0 (1) (2)
Net benefit (credit) cost 1 0 (1)
Changes in plan assets and benefit obligations recognized in other comprehensive income (loss):      
Liability experience (3) (2)  
Asset experience 0 0  
Total amount recognized as change in plan assets and benefit obligations (3) (2)  
Ending balance (1) 2 4
Non-U.S. | Pension  Benefits      
Reconciliation of unrecognized net actuarial gain loss [Roll Forward]      
Beginning balance (3,519) (3,219)  
Recognized as component of net benefit (credit) cost:      
Recognized actuarial loss (gain) 18 10 3
Net benefit (credit) cost (154) (208) (182)
Amortization of net gain (loss) 18 10  
Effect of settlement 10 2  
Total recognized as component of net benefit cost (credit) 28 12  
Changes in plan assets and benefit obligations recognized in other comprehensive income (loss):      
Liability experience 244 423  
Asset experience (373) (831)  
Total amount recognized as change in plan assets and benefit obligations (129) (408)  
Exchange rate adjustments (277) 96  
Ending balance (3,897) (3,519) (3,219)
Non-U.S. | Post-retirement Benefits      
Reconciliation of unrecognized net actuarial gain loss [Roll Forward]      
Beginning balance 3 17  
Recognized as component of net benefit (credit) cost:      
Recognized actuarial loss (gain) (1) (5) (1)
Net benefit (credit) cost 1 (5) (1)
Amortization of net gain (loss) (1) (5)  
Effect of settlement 0 0  
Total recognized as component of net benefit cost (credit) (1) (5)  
Changes in plan assets and benefit obligations recognized in other comprehensive income (loss):      
Liability experience 1 (9)  
Asset experience 0 0  
Total amount recognized as change in plan assets and benefit obligations 1 (9)  
Exchange rate adjustments 0 0  
Ending balance $ 3 $ 3 $ 17