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Stockholders' equity (Tables) | 3 Months Ended
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Mar. 31, 2020
Equity [Abstract] |
Summary of activity under our stock repurchase program | Activity under our stock repurchase program, on a trade date basis, was as follows (in millions):
| 2020 |  | 2019
| Shares |  | Dollars |  | Shares |  | Dollars
First quarter | 4.3 |  |  | $ | 933 |  |  | 15.9 |  |  | $ | 3,031 |
Components of accumulated other comprehensive income | The components of Accumulated other comprehensive income (loss) (AOCI) were as follows (in millions):
| Foreign currency translation |  | Cash flow hedges |  | Available-for-sale securities |  | Other |  | AOCI
Balance as of December 31, 2019 | $ | (718 | ) |  | $ | 175 |  |  | $ | 22 |  |  | $ | (7 | ) |  | $ | (528 | )
Foreign currency translation adjustments | (52 | ) |  | — |  |  | — |  |  | — |  |  | (52 | )
Unrealized (losses) gains | — |  |  | (162 | ) |  | 8 |  |  | — |  |  | (154 | )
Reclassification adjustments to income | — |  |  | 84 |  |  | (33 | ) |  | — |  |  | 51 |
Other | — |  |  | — |  |  | — |  |  | (2 | ) |  | (2 | )
Income taxes | — |  |  | 17 |  |  | 6 |  |  | — |  |  | 23 |
Balance as of March 31, 2020 | $ | (770 | ) |  | $ | 114 |  |  | $ | 3 |  |  | $ | (9 | ) |  | $ | (662 | )
Reclassifications out of accumulated other comprehensive income | Reclassifications out of AOCI and into earnings were as follows (in millions):
|  | Three months ended March 31, |  |
Components of AOCI |  | 2020 |  | 2019 |  | Condensed Consolidated Statements of Income locations
Cash flow hedges: |  |  |  |  |  |
Foreign currency contract gains |  | $ | 49 |  |  | $ | 14 |  |  | Product sales
Cross-currency swap contract losses |  | (133 | ) |  | (42 | ) |  | Interest and other income, net
|  | (84 | ) |  | (28 | ) |  | Income before income taxes
|  | 18 |  |  | 6 |  |  | Provision for income taxes
|  | $ | (66 | ) |  | $ | (22 | ) |  | Net income
Available-for-sale securities: |  |  |  |  |  |
Net realized gains (losses) |  | $ | 33 |  |  | $ | (4 | ) |  | Interest and other income, net
|  | (7 | ) |  | — |  |  | Provision for income taxes
|  | $ | 26 |  |  | $ | (4 | ) |  | Net income

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- Definition Tabular disclosure of information about items reclassified out of accumulated other comprehensive income (loss). + References No definition available. + Details
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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669686-108580 + Details
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