v3.25.0.1
Benefit Plans: (Movements in Other Comprehensive Earnings (Losses)) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Amortization:      
Net losses (gains) $ 175 $ 96 $ 266
Prior service cost (credit) (6) 7 (4)
Net transition obligation (asset) 0 0  
Other income/expense:      
Net losses (gains) 2 12 3
Prior service cost (credit) 0 0 1
Deferred income taxes (36) (28) (49)
Amortization of net losses, prior service costs and net transition costs 135 87 217
Other movements during the year:      
Deferred income taxes 8 182 (132)
Net gains (losses) and prior service costs (10) (861) 843
Total accumulated other comprehensive losses      
Other movements during the year:      
Net (losses) gains (19) (1,035) 970
Prior service (cost) credit 4 0 3
Deferred income taxes 8 181 (132)
Net gains (losses) and prior service costs (7) (854) 841
Total movements in other comprehensive earnings (losses) 128 (767) 1,058
Pension      
Amortization:      
Net losses (gains) 88 19 178
Prior service cost (credit) (6) 7 (4)
Net transition obligation (asset) 0 0  
Other income/expense:      
Net losses (gains) 1 11 2
Prior service cost (credit) 0 0 0
Deferred income taxes (13) (9) (28)
Amortization of net losses, prior service costs and net transition costs 70 28 148
Other movements during the year:      
Net (losses) gains 114 (918) 878
Prior service (cost) credit 4 0 3
Deferred income taxes (24) 154 (112)
Net gains (losses) and prior service costs 94 (764) 769
Total movements in other comprehensive earnings (losses) 164 (736) 917
Post- retirement      
Amortization:      
Net losses (gains) 1 1 3
Prior service cost (credit) 0 0 0
Net transition obligation (asset) 0 0  
Other income/expense:      
Net losses (gains) 1 1 1
Prior service cost (credit) 0 0 0
Deferred income taxes (2) (1) (1)
Amortization of net losses, prior service costs and net transition costs 0 1 3
Other movements during the year:      
Net (losses) gains (2) (24) 46
Prior service (cost) credit 0 0 0
Deferred income taxes 2 6 (9)
Net gains (losses) and prior service costs 0 (18) 37
Total movements in other comprehensive earnings (losses) 0 (17) 40
Post- employment      
Amortization:      
Net losses (gains) 86 76 85
Prior service cost (credit) 0 0 0
Net transition obligation (asset) 0 0  
Other income/expense:      
Net losses (gains) 0 0 0
Prior service cost (credit) 0 0 1
Deferred income taxes (21) (18) (20)
Amortization of net losses, prior service costs and net transition costs 65 58 66
Other movements during the year:      
Net (losses) gains (131) (93) 46
Prior service (cost) credit 0 0 0
Deferred income taxes 30 21 (11)
Net gains (losses) and prior service costs (101) (72) 35
Total movements in other comprehensive earnings (losses) $ (36) $ (14) $ 101