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Benefit Plans - Projected Benefit Obligations, Plan Assets and Funded Status of Pension Plans (Details) - Pension Plans - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Fair value of plan assets at January 1 $ 12,724    
Fair value of plan assets at December 31 8,538 $ 12,724  
U.S. Plans      
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Projected benefit obligation at January 1 1,729 1,887  
Service cost 5 6 $ 6
Interest cost 51 42 49
Benefits paid (39) (31)  
Settlements paid (71) (113)  
Actuarial (gains)/losses (482) (63)  
Acquisitions 0 0  
Currency 0 0  
Other 0 1  
Projected benefit obligation at December 31 1,193 1,729 1,887
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Fair value of plan assets at January 1 1,826 1,959  
Actual return on plan assets (455) 1  
Contributions 4 10  
Benefits paid (39) (31)  
Settlements paid (71) (113)  
Other 0 0  
Other 0 0  
Fair value of plan assets at December 31 1,265 1,826 1,959
Net pension assets at December 31 72 97  
Non-U.S. Plans      
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Projected benefit obligation at January 1 10,821 11,658  
Service cost 88 137 121
Interest cost 172 130 149
Benefits paid (461) (533)  
Settlements paid 0 0  
Actuarial (gains)/losses (2,844) (269)  
Acquisitions 18 0  
Currency (957) (308)  
Other 41 6  
Projected benefit obligation at December 31 6,878 10,821 11,658
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Fair value of plan assets at January 1 11,021 10,972  
Actual return on plan assets (2,388) 548  
Contributions 211 292  
Benefits paid (461) (533)  
Settlements paid 0 0  
Other (992) (258)  
Other (2) 0  
Fair value of plan assets at December 31 7,389 11,021 $ 10,972
Net pension assets at December 31 $ 511 $ 200