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Restructuring and Other Charges (Tables)
 3 Months Ended
Mar. 31, 2019
Restructuring and Related Activities [Abstract]  
Activity and Reserve Balances for Restructuring Charges
Activity and reserve balances for restructuring and other charges were as follows:
 
Layoff
costs
 
Other exit
costs
 
Total
Reserve balances at December 31, 2017
$
56

 
$
2

 
$
58

Cash payments
(47
)
 
(2
)
 
(49
)
Restructuring charges
111

 
13

 
124

Other(1)
(110
)
 
2

 
(108
)
Reserve balances at December 31, 2018
10

 
15

 
25

Cash payments
(14
)
 
(3
)
 
(17
)
Restructuring charges
11

 
—

 
11

Other(1)
57

 
(9
)
 
48

Reserve balances at March 31, 2019
$
64

 
$
3

 
$
67

(1) 
Other includes adjustments of previously recorded restructuring charges and credits, and the effects of foreign currency translation. In 2019, Other for layoff costs included reclassifications of a $58 credit for elimination of life insurance benefits for U.S. salaried and non-bargaining hourly retirees and a $2 pension settlement charge, as the impacts were reflected in Arconic's separate liabilities for Accrued pension benefits and Accrued postretirement benefits. Other for other exit costs included a reclassification of $9 in lease exit costs to right-of-use assets within Other noncurrent assets in accordance with the new lease accounting standard. In 2018, Other for layoff costs included reclassifications of $119 in pension costs and a $28 credit in postretirement benefits, as the impacts were reflected in Arconic's separate liabilities for Accrued pension benefits and Accrued postretirement benefits, and reversals of previously recorded restructuring charges of $19.