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Pensions Benefit Plans and Other Postretirement Benefits - Components of Net Periodic Pension and Postretirement Cost (Income) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Other:      
Pension settlement charges $ (74) $ (26) $ (26)
Pension Benefit Plans | Funded Plan      
Other:      
Accumulated benefit obligation 2,210 2,692  
Pension Benefit Plans | U.S. | Funded Plan      
Components of net periodic pension cost      
Service cost 13 11 12
Interest cost 40 50 58
Expected asset return (82) (85) (86)
Amortization:      
Amortization of actuarial loss 61 56 41
Net periodic pension cost 32 32 25
Other:      
Pension settlement charges 74 26 26
Pension Benefit Plans | Non-U.S. Pension Plans | Funded Plan      
Components of net periodic pension cost      
Service cost 12 13 12
Interest cost 21 26 33
Expected asset return (46) (45) (48)
Amortization:      
Amortization of actuarial loss 13 12 10
Net periodic pension cost   6 7
Pension Benefit Plans | Canadian Pension Plans | Funded Plan      
Other:      
Annuity contract purchase for settlement of pension obligation 239 31  
Postretirement Benefits Other Than Pensions | U.S. | Funded Plan      
Components of net periodic pension cost      
Interest cost 2 2 4
Amortization:      
Amortization of actuarial loss (9) (11) 1
Prior service cost 9 5 (8)
Net amortization   (6) (7)
Net periodic pension cost 2 (4) (3)
Postretirement Benefits Other Than Pensions | Non-U.S. Pension Plans | Funded Plan      
Components of net periodic pension cost      
Service cost 2 2 1
Interest cost 2 2 3
Amortization:      
Prior service cost   (1)  
Net amortization   (1)  
Net periodic pension cost $ 4 $ 3 $ 4