v3.25.0.1
Benefit Plans: (Obligations and Funded Status) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Fair value of plan assets, beginning balance $ 3    
Employer contributions, net of refunds (110) $ (21) $ 3
Fair value of plan assets, ending balance 3 3  
Pension      
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Benefit obligation, beginning balance 10,567 8,606  
Service cost 218 174 233
Interest cost 234 258 78
Benefits paid (434) (520)  
Employee contributions 157 145  
Settlement, curtailment and plan amendment (12) (17)  
Actuarial losses (gains) 460 1,209  
Currency (708) 763  
Other (26) (51)  
Benefit obligation, ending balance 10,456 10,567 8,606
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Fair value of plan assets, beginning balance 8,851 7,939  
Actual return on plan assets 973 643  
Employer contributions, net of refunds 110 21  
Employee contributions 157 145  
Benefits paid (434) (520)  
Settlement (10) (17)  
Currency (600) 639  
Other (17) 1  
Fair value of plan assets, ending balance 9,030 8,851 7,939
Net benefit liability (1,426) (1,716)  
Post- retirement      
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Benefit obligation, beginning balance 246 229  
Service cost 3 4 2
Interest cost 13 12 6
Benefits paid (14) (13)  
Employee contributions 0 0  
Settlement, curtailment and plan amendment (1) 0  
Actuarial losses (gains) 2 24  
Currency 5 (4)  
Other (6) (6)  
Benefit obligation, ending balance 248 246 229
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Fair value of plan assets, beginning balance 3 3  
Actual return on plan assets 0 0  
Employer contributions, net of refunds 14 13  
Employee contributions 0 0  
Benefits paid (14) (13)  
Settlement (1) 0  
Currency 1 0  
Other 0 0  
Fair value of plan assets, ending balance   3 $ 3
Net benefit liability $ (245) $ (243)