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Restructuring and Other Charges (Tables) | 9 Months Ended
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Sep. 30, 2018
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, 2016 | $ | 50 |  |  | $ | 9 |  |  | $ | 59 |
Cash payments | (59 | ) |  | (6 | ) |  | (65 | )
Restructuring charges | 64 |  |  | 1 |  |  | 65 |
Other(1) | 1 |  |  | (2 | ) |  | (1 | )
Reserve balances at December 31, 2017 | 56 |  |  | 2 |  |  | 58 |
Cash payments | (37 | ) |  | (1 | ) |  | (38 | )
Restructuring charges | 8 |  |  | 13 |  |  | 21 |
Other(1) | — |  |  | — |  |  | — |
Reserve balances at September 30, 2018 | $ | 27 |  |  | $ | 14 |  |  | $ | 41 |
(1) | Other includes reversals of previously recorded restructuring charges and credits, and the effects of foreign currency translation. In 2018, Other for layoff costs included the following: a reclassification of a $28 credit in postretirement benefits, as the impact to the liability was reflected in Arconic’s separate liability for postretirement benefits; a reclassification of $18 in pension costs, as this liability was reflected in Arconic’s separate liability for pension benefits; and reversals of $10 for previously recorded layoff charges. In 2017, Other for layoff costs included a reclassification of a stock awards reversal of $13 and reversals of $11 for previously recorded layoff reserves.

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- Definition Tabular disclosure of an entity's restructuring reserve that occurred during the period associated with the exit from or disposal of business activities or restructurings for each major type of cost. This element may also include a description of any reversal and other adjustment made during the period to the amount of an accrued liability for restructuring activities. This element may be used to encapsulate the roll forward presentations of an entity's restructuring reserve by type of cost and in total, and explanation of changes that occurred in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)(2)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 + Details
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