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Financial Instruments (Tables) | 3 Months Ended
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Mar. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items] |
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] | The following table summarizes the fair value and presentation in the Condensed Consolidated Balance Sheets for derivative instruments as of March 31, 2019 and December 31, 2018:
(dollars in millions) | Balance Sheet Location | March 31, 2019 |  | December 31, 2018
Derivatives designated as hedging instruments: |  |  |  |
Foreign exchange contracts | Asset Derivatives: |  |  |
| Other assets, current | $ | 6 |  |  | $ | 10 |
| Other assets | 10 |  |  | 12 |
| Total asset derivatives | $ | 16 |  |  | $ | 22 |
| Liability Derivatives: |  |  |
| Accrued liabilities | (54 | ) |  | (83 | )
| Other long-term liabilities | (63 | ) |  | (111 | )
| Total liability derivatives | $ | (117 | ) |  | $ | (194 | )
Derivatives not designated as hedging instruments: |  |  |  |
Foreign exchange contracts | Asset Derivatives: |  |  |
| Other assets, current | 42 |  |  | 44 |
| Other assets | 12 |  |  | 19 |
| Total asset derivatives | $ | 54 |  |  | $ | 63 |
| Liability Derivatives: |  |  |
| Accrued liabilities | (47 | ) |  | (89 | )
| Other long-term liabilities | (37 | ) |  | (3 | )
| Total liability derivatives | $ | (84 | ) |  | $ | (92 | )
Reclassification out of Accumulated Other Comprehensive Income [Member] |
Derivative Instruments, Gain (Loss) [Line Items] |
Derivative Instruments, Gain (Loss) [Table Text Block] | The effect of cash flow hedging relationships on accumulated other comprehensive income for the quarters ended March 31, 2019 and 2018 are presented in the table below. The amounts of gain or (loss) are attributable to foreign exchange contract activity and are recorded as a component of Product sales when reclassified from accumulated other comprehensive income.
| Quarter Ended March 31,
(dollars in millions) | 2019 |  | 2018
Gain recorded in Accumulated other comprehensive loss | $ | 7 |  |  | $ | 45 |
Loss (gain) reclassified from Accumulated other comprehensive loss into Product sales | 4 |  |  | (27 | )
Other Income [Member] |
Derivative Instruments, Gain (Loss) [Line Items] |
Derivative Instruments, Gain (Loss) [Table Text Block] | The effect of derivatives not designated as hedging instruments within Other income, net, on the Condensed Consolidated Statement of Operations was as follows:
| Quarter Ended March 31,
(dollars in millions) | 2019 |  | 2018
Foreign exchange contracts | $ | 18 |  |  | $ | 51 |

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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/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4E -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624181-113959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959 + Details
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- Definition Tabular disclosure of the location and fair value amounts of derivative instruments (and nonderivative instruments that are designated and qualify as hedging instruments) reported in the statement of financial position. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959 + Details
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