Annual report [Section 13 and 15(d), not S-K Item 405]

Employee Benefit Plans - Narrative (Details)

v3.25.0.1
Employee Benefit Plans - Narrative (Details) - USD ($)
shares in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]      
Increase (decrease) from change in weighted average discount rates $ (767,000,000) $ 511,000,000  
Increase (decrease) in level 3 plan assets 23,000,000 16,000,000 $ (222,000,000)
Fair value of plan assets 19,280,000,000 19,655,000,000  
Increase (decrease) in level 3 plan assets due to unrealized gains (losses) (5,000,000) 4,000,000 (8,000,000)
Increase (decrease) in level 3 plan assets due to purchases 28,000,000 12,000,000  
Increase (decrease) in level 3 plan assets due to sales and settlements     (214,000,000)
Cost recognized $ 1,300,000,000 $ 1,200,000,000 1,200,000,000
Number of common stock shares held in plan (in shares) 153 178  
Dividend payments to the plan $ 165,000,000 $ 166,000,000 153,000,000
Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 460,000,000 437,000,000 421,000,000
Equity securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3,795,000,000 4,027,000,000  
Equity securities | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
U.S. | Other Pension Plan      
Defined Benefit Plan Disclosure [Line Items]      
Company contributions 0 0  
U.S. | Other Pension Plan | Nonqualified      
Defined Benefit Plan Disclosure [Line Items]      
Estimated future employer contributions in next fiscal year 90,000,000    
Fair value of plan assets 1,739,000,000 1,849,000,000 1,886,000,000
U.S. | Pension Plan | Qualified      
Defined Benefit Plan Disclosure [Line Items]      
Estimated future employer contributions in next fiscal year $ 0    
Percentage of prior years market gains (losses) recognized at next measurement date 60.00%    
Percentage of prior years market gains (losses) recognized equally over four year period 40.00%    
Fair value of plan assets $ 17,624,000,000 17,632,000,000 17,258,000,000
U.S. | Pension Plan | Qualified | Equity securities      
Defined Benefit Plan Disclosure [Line Items]      
Amount of employer and related party securities included in plan assets $ 386,000,000 $ 299,000,000  
Actual plan asset allocations 2.19% 1.69%  
U.S. | Postretirement Health and Life Plans      
Defined Benefit Plan Disclosure [Line Items]      
Estimated future employer contributions in next fiscal year $ 29,000,000    
Percentage of unrecognized gain (loss) recognized during the period 50.00%    
Health care cost trend rate assumed for next fiscal year 6.25%    
Ultimate health care cost trend rate 5.00%    
Fair value of plan assets $ 88,000,000 $ 98,000,000 107,000,000
Non-U.S. | Pension Plan      
Defined Benefit Plan Disclosure [Line Items]      
Estimated future employer contributions in next fiscal year 13,000,000    
Fair value of plan assets $ 1,580,000,000 $ 1,779,000,000 $ 1,728,000,000