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Pensions Benefit Plans and Other Postretirement Benefits - Amortized From AOCI (Details)
$ in Millions
Dec. 31, 2019
USD ($)
U.S. | Pension Benefit Plans  
Amortization:  
Actuarial loss $ 56
U.S. | Other Postretirement Benefits  
Amortization:  
Actuarial loss 1
Prior service credit (8)
Net amortization (7)
Non-U.S. | Pension Benefit Plans  
Amortization:  
Actuarial loss 13
Non-U.S. | Other Postretirement Benefits  
Amortization:  
Actuarial loss (1)
Net amortization $ (1)