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Pension and Other Postretirement Benefit Plans - Net Periodic Costs Recognized in Operating Profit and Interest and Sundry (Income) Expense (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Other Postretirement Benefits    
Defined Benefit Plan Disclosure [Line Items]    
Net periodic cost $ 3 $ (3)
Operating profit | Other Postretirement Benefits    
Defined Benefit Plan Disclosure [Line Items]    
Net periodic cost 2 2
Interest and sundry (income) expense | Other Postretirement Benefits    
Defined Benefit Plan Disclosure [Line Items]    
Net periodic cost 1 (5)
United States Pension Benefits | Pension Benefits    
Defined Benefit Plan Disclosure [Line Items]    
Net periodic cost 0 (1)
United States Pension Benefits | Operating profit | Pension Benefits    
Defined Benefit Plan Disclosure [Line Items]    
Net periodic cost 1 1
United States Pension Benefits | Interest and sundry (income) expense | Pension Benefits    
Defined Benefit Plan Disclosure [Line Items]    
Net periodic cost (1) (2)
Foreign Pension Benefits | Pension Benefits    
Defined Benefit Plan Disclosure [Line Items]    
Net periodic cost 1 3
Foreign Pension Benefits | Operating profit | Pension Benefits    
Defined Benefit Plan Disclosure [Line Items]    
Net periodic cost 2 1
Foreign Pension Benefits | Interest and sundry (income) expense | Pension Benefits    
Defined Benefit Plan Disclosure [Line Items]    
Net periodic cost $ (1) $ 2