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Fair Value Measurements and Financial Instruments (Tables) | 3 Months Ended
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Mar. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance [Table Text Block] | Gains and losses on derivative financial instruments for the three months ended March 31, 2018 and 2017 are as follows:
|  | Recorded Income (Loss) into AOCI, net of tax |  | Reclassified from AOCI into Income (Loss) |  | Recorded in Income (Loss)
|  | 2018 |  | 2017 |  | 2018 |  | 2017 |  | 2018 |  | 2017
|  | (Dollars in Millions)
Three Months Ended March 31, 2018 |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency risk - Sales: |  |  |  |  |  |  |  |  |  |  |  |
Cash flow hedges |  | $ | 1 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Non-designated cash flow hedges |  | — |  |  | — |  |  | — |  |  | — |  |  | 1 |  |  | — |
Foreign currency risk - Cost of sales: |  |  |  |  |  |  |  |  |  |  |  |
Cash flow hedges |  | 1 |  |  | 2 |  |  | — |  |  | (2 | ) |  | — |  |  | — |
Non-designated cash flow hedges |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 1 |
Interest rate risk - Interest expense, net: |  |  |  |  |  |  |  |  |  |  |  |
Interest rate swap |  | 1 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Net investment hedges |  | (6 | ) |  | (1 | ) |  | — |  |  | — |  |  | — |  |  | — |
|  | $ | (3 | ) |  | $ | 1 |  |  | $ | — |  |  | $ | (2 | ) |  | $ | 1 |  |  | $ | 1 |

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- Definition Tabular disclosure of the location and amount of derivative instruments and nonderivative instruments designated as hedging instruments reported before netting adjustments, and the amount of gain (loss) on derivative instruments and nonderivative instruments designated and qualified as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5618551-113959 + Details
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