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Other Expense, Net
 9 Months Ended
Sep. 30, 2021
Other Income and Expenses [Abstract]  
Other Expense, Net Other Expense, Net
Third quarter endedNine months ended
 September 30,September 30,
2021202020212020
Non-service related net periodic benefit cost$2 $8 $8 $19 
Interest income(1)(1)(2)(5)
Foreign currency (gains) losses, net(2)(5)1 (12)
Net loss from asset sales3 2 7 6 
Deferred compensation(1)4 5 1 
Other, net— — (6)(9)
Other expense, net$1 $8 $13 $—