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Pensions Benefit Plans and Other Postretirement Benefits - Changes in the Benefit Obligation (Details) - Funded Plan - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Sep. 30, 2020
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Pension Benefit Plans | U.S.        
Changes in the pension and postretirement benefit obligations        
Obligations at beginning of year   $ 1,590 $ 1,505  
Change in benefit obligations:        
Service cost   13 11 $ 12
Interest cost   40 50 58
Actuarial (gain) loss   (73) 134  
Settlements   (252) (24)  
Benefit payments   (76) (86)  
Net change in benefit obligations   (348) 85  
Obligations at end of year   1,242 1,590 1,505
Pension Benefit Plans | Non-U.S. Pension Plans        
Changes in the pension and postretirement benefit obligations        
Obligations at beginning of year   1,127 1,150  
Change in benefit obligations:        
Service cost   12 13 12
Interest cost   21 26 33
Actuarial (gain) loss   (82) 67  
Settlements   (8) (63)  
Acquisitions (Divestiture)     (56)  
Participant contributions     1  
Benefit payments   (53) (51)  
Other   1 6  
Foreign currency translation   (28) 34  
Net change in benefit obligations   (137) (23)  
Obligations at end of year   990 1,127 1,150
Postretirement Benefits Other Than Pensions | U.S.        
Changes in the pension and postretirement benefit obligations        
Obligations at beginning of year   38 72  
Change in benefit obligations:        
Interest cost   2 2 4
Actuarial (gain) loss   (4) 14  
Benefit payments   (2) (11)  
Other     (39)  
Net change in benefit obligations $ 39 (4) (34)  
Obligations at end of year   34 38 72
Postretirement Benefits Other Than Pensions | Non-U.S. Pension Plans        
Changes in the pension and postretirement benefit obligations        
Obligations at beginning of year   80 71  
Change in benefit obligations:        
Service cost   2 2 1
Interest cost   2 2 3
Actuarial (gain) loss   (6) 5  
Benefit payments   (2) (2)  
Foreign currency translation     2  
Net change in benefit obligations   (4) 9  
Obligations at end of year   $ 76 $ 80 $ 71