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Employee Benefit Plans - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Other income, net $ 4 $ 3 $ 13 $ 10
Expected future employer contributions in remaining year $ 19   19  
U.S. Plans        
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Cash contributions by employer     12  
Foreign Plan        
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Cash contributions by employer     $ 5