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Acquisition Business Combination- Pro Forma Information (Tables) | 12 Months Ended
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Dec. 31, 2017
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items] |
Business Acquisition, Pro Forma Information [Table Text Block] | The following pro forma information presents the combined results of operations of Gilead and Kite as if the acquisition of Kite had been completed on January 1, 2016, with adjustments to give effect to pro forma events that are directly attributable to the acquisition (in millions, unaudited):
|  | Year Ended December 31,
|  | 2017 |  | 2016
Total revenues |  | $ | 26,127 |  |  | $ | 30,390 |
Net income attributable to Gilead |  | $ | 4,508 |  |  | $ | 12,928 |

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- Definition Tabular disclosure of pro forma results of operations for a material business acquisition or series of individually immaterial business acquisitions that are material in the aggregate. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2)-(3) -URI http://asc.fasb.org/extlink&oid=65885119&loc=d3e1392-128463 + Details
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