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Valuation and Qualifying Accounts | 12 Months Ended
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Dec. 31, 2017
Valuation and Qualifying Accounts [Abstract] |
Valuation and Qualifying Accounts |
Description | Balance at Beginning of Period |  | Additions |  | Deductions |  |
Charged to Costs and Expenses |  | Charged to Other Accounts(a) |  | Write-Offs and Reclassifications |  | Balance at End of Period
December 31, 2017 |  |  |  |  |  |  |  |  |
Allowances deducted from assets to which they apply |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts | $ | 50 |  |  | $ | 8 |  |  | $ | 2 |  |  | $ | 22 |  | (b) | $ | 38 |
Allowances for sales discounts | 18 |  |  | 247 |  |  | — |  |  | 247 |  | (c) | 18 |
December 31, 2016 |  |  |  |  |  |  |  |  |
Allowances deducted from assets to which they apply |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts | $ | 50 |  |  | $ | 8 |  |  | $ | 3 |  |  | $ | 11 |  | (b) | $ | 50 |
Allowances for sales discounts | 15 |  |  | 254 |  |  | — |  |  | 251 |  | (c) | 18 |
December 31, 2015 |  |  |  |  |  |  |  |  |
Allowances deducted from assets to which they apply |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts | $ | 50 |  |  | $ | 12 |  |  | $ | (10 | ) |  | $ | 2 |  | (b) | $ | 50 |
Allowances for sales discounts | 16 |  |  | 256 |  |  | (1 | ) |  | 256 |  | (c) | 15 |
(a) | Includes bad debt recoveries and the effects of changes in foreign currency exchange rates.
(b) | Primarily uncollectible receivables written off.
(c) | Sales discounts allowed.
|  |  | Additions |  |  |  |
Description | Balance at Beginning of Period |  | Charged to Costs and Expenses |  | Charged to Other Accounts |  | Deductions(a) |  | Balance at End of Period
December 31, 2017 |  |  |  |  |  |  |  |  |
Deferred taxes |  |  |  |  |  |  |  |  |
Valuation allowance | $ | 225 |  |  | $ | (59 | ) |  | $ | — |  |  | $ | (10 | ) |  | $ | 176 |
December 31, 2016 |  |  |  |  |  |  |  |  |
Deferred taxes |  |  |  |  |  |  |  |  |
Valuation allowance | $ | 274 |  |  | $ | (45 | ) |  | $ | — |  |  | $ | 4 |  |  | $ | 225 |
December 31, 2015 |  |  |  |  |  |  |  |  |
Deferred taxes |  |  |  |  |  |  |  |  |
Valuation allowance | $ | 215 |  |  | $ | 78 |  |  | $ | — |  |  | $ | 19 |  |  | $ | 274 |
(a) | Represents the net currency effects of translating valuation allowances at current rates of exchange.

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- Definition The entire disclosure for any allowance and reserve accounts (their beginning and ending balances, as well as a reconciliation by type of activity during the period). Alternatively, disclosure of the required information may be within the footnotes to the financial statements or a supplemental schedule to the financial statements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration