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Derivative instruments (Tables) | 12 Months Ended
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Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Schedule of notional amounts and interest rates for cross-currency swaps | The notional amounts and interest rates of our cross-currency swaps as of December 31, 2017, were as follows (notional amounts in millions):
|  | Foreign currency |  | U.S. dollars
Hedged notes |  | Notional amount |  | Interest rate |  | Notional amount |  | Interest rate
2.125% 2019 euro Notes |  | € | 675 |  |  | 2.125 | % |  | $ | 864 |  |  | 2.6 | %
1.25% 2022 euro Notes |  | € | 1,250 |  |  | 1.25 | % |  | $ | 1,388 |  |  | 3.2 | %
0.41 % 2023 Swiss franc Bonds |  | CHF | 700 |  |  | 0.41 | % |  | $ | 704 |  |  | 3.4 | %
2.00% 2026 euro Notes |  | € | 750 |  |  | 2.00 | % |  | $ | 833 |  |  | 3.9 | %
5.50% 2026 pound sterling Notes |  | £ | 475 |  |  | 5.50 | % |  | $ | 747 |  |  | 6.0 | %
4.00% 2029 pound sterling Notes |  | £ | 700 |  |  | 4.00 | % |  | $ | 1,111 |  |  | 4.5 | %
Effective portion of the unrealized gain (loss) recognized in Other Comprehensive Income for our derivative instruments designated as cash flow hedges | The effective portions of unrealized gains and losses recognized in AOCI for our derivative instruments designated as cash flow hedges were as follows (in millions):
|  |  |  | Years ended December 31,
Derivatives in cash flow hedging relationships |  |  |  | 2017 |  | 2016 |  | 2015
Foreign currency contracts |  |  |  | $ | (402 | ) |  | $ | 115 |  |  | $ | 425 |
Cross-currency swap contracts |  |  |  | 581 |  |  | (281 | ) |  | (275 | )
Forward interest rate contracts |  |  |  | 13 |  |  | (10 | ) |  | — |
Total unrealized gains (losses) |  |  |  | $ | 192 |  |  | $ | (176 | ) |  | $ | 150 |
Location in the Consolidated Statements of Income and the effective portion of gain (loss) reclassified from Accumulated Other Comprehensive Income into earnings for our derivative instruments designated as cash flow hedges | The locations in the Consolidated Statements of Income and the effective portions of the gains and losses reclassified out of AOCI and into earnings for our derivative instruments designated as cash flow hedges were as follows (in millions):
|  |  |  | Years ended December 31,
Derivatives in cash flow hedging relationships |  | Consolidated Statements of Income location |  | 2017 |  | 2016 |  | 2015
Foreign currency contracts |  | Product sales |  | $ | 65 |  |  | $ | 308 |  |  | $ | 326 |
Cross-currency swap contracts |  | Interest and other income, net |  | 574 |  |  | (446 | ) |  | (182 | )
Forward interest rate contracts |  | Interest expense, net |  | (1 | ) |  | (1 | ) |  | (1 | )
Total realized gains (losses) |  |  |  | $ | 638 |  |  | $ | (139 | ) |  | $ | 143 |
Location in the Consolidated Statements of Income and the amount of gain (loss) recognized in earnings for the derivative instruments not designated as hedging instruments | The location in the Consolidated Statements of Income and the amount of gains (losses) recognized in earnings for our derivative instruments not designated as hedging instruments were as follows (in millions):
|  |  |  | Years ended December 31,
Derivatives not designated as hedging instruments |  | Consolidated Statements of Income location |  | 2017 |  | 2016 |  | 2015
Foreign currency contracts |  | Interest and other income, net |  | $ | 24 |  |  | $ | (56 | ) |  | $ | (16 | )
Fair values of derivatives included in the Consolidated Balance Sheets | The fair values of derivatives included on the Consolidated Balance Sheets were as follows (in millions):
|  | Derivative assets |  | Derivative liabilities
December 31, 2017 |  | Consolidated Balance Sheet location |  | Fair value |  | Consolidated Balance Sheet location |  | Fair value
Derivatives designated as hedging instruments: |  |  |  |  |  |  |  |
Foreign currency contracts |  | Other current assets/ Other noncurrent assets |  | $ | 6 |  |  | Accrued liabilities/ Other noncurrent liabilities |  | $ | 204 |
Cross-currency swap contracts |  | Other current assets/ Other noncurrent assets |  | 270 |  |  | Accrued liabilities/ Other noncurrent liabilities |  | 220 |
Interest rate swap contracts |  | Other current assets/ Other noncurrent assets |  | 10 |  |  | Accrued liabilities/ Other noncurrent liabilities |  | 61 |
Total derivatives designated as hedging instruments |  |  |  | $ | 286 |  |  |  |  | $ | 485 |
|  | Derivative assets |  | Derivative liabilities
December 31, 2016 |  | Consolidated Balance Sheet location |  | Fair value |  | Consolidated Balance Sheet location |  | Fair value
Derivatives designated as hedging instruments: |  |  |  |  |  |  |  |
Foreign currency contracts |  | Other current assets/ Other noncurrent assets |  | $ | 203 |  |  | Accrued liabilities/ Other noncurrent liabilities |  | $ | 4 |
Cross-currency swap contracts |  | Other current assets/ Other noncurrent assets |  | — |  |  | Accrued liabilities/ Other noncurrent liabilities |  | 523 |
Interest rate swap contracts |  | Other current assets/ Other noncurrent assets |  | 41 |  |  | Accrued liabilities/ Other noncurrent liabilities |  | 7 |
Total derivatives designated as hedging instruments |  |  |  | $ | 244 |  |  |  |  | $ | 534 |

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- Definition Tabular disclosure of the location in the Consolidated Statements of Income and the amount of gain (loss) recognized in earnings for the derivative instruments not designated as hedging instruments. + References No definition available. + Details
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- Definition Tabular disclosure of the effective portion of the gains and losses on derivative instruments designated (and non-derivative instruments) designated and qualifying in cash flow hedges and net investment hedges that was recognized in other comprehensive income (loss) during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959 + Details
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