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Net Income Per Share Attributable to Gilead Common Shareholders (Tables) | 12 Months Ended
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Dec. 31, 2021
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted | The following table shows the calculation of basic and diluted net income per share attributable to Gilead common stockholders:
|  | Year Ended December 31,
(in millions, except per share amounts) |  | 2021 |  | 2020 |  | 2019
Net income attributable to Gilead |  | $ | 6,225 |  |  | $ | 123 |  |  | $ | 5,386 |
Shares used in per share calculation - basic |  | 1,256 |  |  | 1,257 |  |  | 1,270 |
Dilutive effect of stock options and equivalents |  | 6 |  |  | 6 |  |  | 7 |
Shares used in per share calculation - diluted |  | 1,262 |  |  | 1,263 |  |  | 1,277 |
Net income per share attributable to Gilead common stockholders - basic |  | $ | 4.96 |  |  | $ | 0.10 |  |  | $ | 4.24 |
Net income per share attributable to Gilead common stockholders - diluted |  | $ | 4.93 |  |  | $ | 0.10 |  |  | $ | 4.22 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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