v3.24.0.1
Benefit Plans: (Movements in Other Comprehensive Earnings (Losses)) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Amortization:      
Net losses (gains) $ 96 $ 266 $ 383
Prior service cost (credit) 7 (4) 6
Net transition obligation 0    
Other income/expense:      
Net losses (gains) 12 3 6
Prior service cost (credit) 0 1  
Deferred income taxes (28) (49) (72)
Amortization of net losses, prior service costs and net transition costs 87 217 323
Other movements during the year:      
Deferred income taxes 182 (132) (210)
Net gains (losses) and prior service costs (861) 843 1,055
Total accumulated other comprehensive losses      
Other movements during the year:      
Net (losses) gains (1,035) 970 1,218
Prior service (cost) credit 0 3 42
Deferred income taxes 181 (132) (210)
Net gains (losses) and prior service costs (854) 841 1,050
Total movements in other comprehensive earnings (losses) (767) 1,058 1,373
Pension Plan      
Amortization:      
Net losses (gains) 19 178 294
Prior service cost (credit) 7 (4) 7
Net transition obligation 0    
Other income/expense:      
Net losses (gains) 11 2 5
Prior service cost (credit) 0 0 0
Deferred income taxes (9) (28) (51)
Amortization of net losses, prior service costs and net transition costs 28 148 255
Other movements during the year:      
Net (losses) gains (918) 878 1,353
Prior service (cost) credit 0 3 42
Deferred income taxes 154 (112) (241)
Net gains (losses) and prior service costs (764) 769 1,154
Total movements in other comprehensive earnings (losses) (736) 917 1,409
Postretirement      
Amortization:      
Net losses (gains) 1 3 4
Prior service cost (credit) 0 0 (1)
Net transition obligation 0    
Other income/expense:      
Net losses (gains) 1 1 1
Prior service cost (credit) 0 0 0
Deferred income taxes (1) (1) (1)
Amortization of net losses, prior service costs and net transition costs 1 3 3
Other movements during the year:      
Net (losses) gains (24) 46 (5)
Prior service (cost) credit 0 0 0
Deferred income taxes 6 (9) 1
Net gains (losses) and prior service costs (18) 37 (4)
Total movements in other comprehensive earnings (losses) (17) 40 (1)
Postemployment Benefit Plans      
Amortization:      
Net losses (gains) 76 85 85
Prior service cost (credit) 0 0 0
Net transition obligation 0    
Other income/expense:      
Net losses (gains) 0 0 0
Prior service cost (credit) 0 1 0
Deferred income taxes (18) (20) (20)
Amortization of net losses, prior service costs and net transition costs 58 66 65
Other movements during the year:      
Net (losses) gains (93) 46 (130)
Prior service (cost) credit 0 0 0
Deferred income taxes 21 (11) 30
Net gains (losses) and prior service costs (72) 35 (100)
Total movements in other comprehensive earnings (losses) $ (14) $ 101 $ (35)