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Employee Benefit Plans (Schedule of Defined Benefit Plan Disclosures) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]      
Other $ 8 $ (51) $ 65
Fair value of plan assets 46,414 48,945  
Non-current liability (2,104) (2,385)  
Pension Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Benefit obligations 46,322 49,592 49,028
Service cost 189 222 470
Interest cost 2,385 2,507 1,520
Actuarial (gain) loss (2,013) 1,909  
Total benefits paid (1) (3,633) (4,258)  
Net settlement, curtailment, and special termination benefits 9 5  
Plan amendments 36 19  
Business combinations and divestitures (23) 0  
Other (220) 160  
Fair value of plan assets 46,414 48,945 $ 47,960
Actual return on plan assets 1,092 4,730  
Employer contributions (1) 235 363  
Total benefits paid (1) (3,633) (4,258)  
Settlements (3) (2)  
Business combinations and divestitures 0 0  
Other (2) (222) 152  
Funded status of plan 92 (647)  
Non-current assets 1,819 1,296  
Current liability (195) (206)  
Non-current liability (1,532) (1,737)  
Net amount recognized 92 (647)  
Net actuarial loss (gain) 4,926 4,311  
Prior service credit (1,044) (1,246)  
Net amount recognized 3,882 3,065  
Pension Plan [Member] | Continuing operations [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 189 222  
Other Postretirement Benefits Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Benefit obligations 898 962  
Fair value of plan assets 314 316  
Funded status of plan (584) (646)  
Non-current assets 0 0  
Current liability (61) (64)  
Non-current liability (523) (582)  
Net amount recognized (584) (646)  
Net actuarial loss (gain) (296) (325)  
Prior service credit (1) (3)  
Net amount recognized $ (297) $ (328)