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Other Expenses (Income), Net
 9 Months Ended
Sep. 30, 2021
Other Income and Expenses [Abstract]  
Other Expenses (Income), Net Other Expenses, Net
Third quarter ended September 30,Nine months ended September 30,
2021202020212020
Non-service costs — Pension and OPEB (G)
$13 $20 $49 $59 
Foreign currency losses, net2 5 2 13 
Interest income(1)— (1)(4)
Other, net1 2 2 1 
$15 $27 $52 $69