v3.8.0.1

Quarterly Financial Information (unaudited) | 12 Months Ended
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Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract] |
Quarterly Financial Information (unaudited) | Quarterly Financial Information (unaudited) The following financial information reflects all normal recurring adjustments, which are, in the opinion of management, necessary for a fair statement of the results and cash flows of interim periods. All quarters for fiscal years 2017 and 2016 ended December 31, 2017 and January 1, 2017 were 13 weeks. Summarized quarterly data for fiscal years 2017 and 2016 are as follows (in millions, except per share amounts):
| First Quarter |  | Second Quarter |  | Third Quarter |  | Fourth Quarter
2017 |  |  |  |  |  |  |  |  |  |  |
Total revenue | $ | 598 |  |  | $ | 662 |  |  | $ | 714 |  |  | $ | 778 |
Gross profit | $ | 368 |  |  | $ | 434 |  |  | $ | 482 |  |  | $ | 542 |
Consolidated net income | $ | 348 |  |  | $ | 120 |  |  | $ | 152 |  |  | $ | 58 |
Net income attributable to Illumina stockholders (a) | $ | 367 |  |  | $ | 128 |  |  | $ | 163 |  |  | $ | 68 |
Earnings per share attributable to Illumina stockholders: |  |  |  |  |  |  |
Basic | $ | 2.50 |  |  | $ | 0.87 |  |  | $ | 1.12 |  |  | $ | 0.47 |
Diluted | $ | 2.48 |  |  | $ | 0.87 |  |  | $ | 1.11 |  |  | $ | 0.46 |
2016 |  |  |  |  |  |  |
Total revenue | $ | 572 |  |  | $ | 600 |  |  | $ | 607 |  |  | $ | 619 |
Gross profit | $ | 397 |  |  | $ | 424 |  |  | $ | 426 |  |  | $ | 419 |
Consolidated net income | $ | 88 |  |  | $ | 116 |  |  | $ | 117 |  |  | $ | 108 |
Net income attributable to Illumina stockholders | $ | 90 |  |  | $ | 120 |  |  | $ | 129 |  |  | $ | 124 |
Earnings per share attributable to Illumina stockholders: |  |  |  |  |  |  |
Basic | $ | 0.61 |  |  | $ | 0.83 |  |  | $ | 0.88 |  |  | $ | 0.84 |
Diluted | $ | 0.60 |  |  | $ | 0.82 |  |  | $ | 0.87 |  |  | $ | 0.84 |
Certain amounts may not recalculate using the rounded amounts provided. (a) First quarter of 2017 includes the results of GRAIL through February 28, 2017, the date of deconsolidation. Refer to note “2. Balance Sheet Account Details” for further discussions.

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- Definition The entire disclosure for quarterly financial data. Includes, but is not limited to, tabular presentation of financial information for fiscal quarters, effect of year-end adjustments, and an explanation of matters or transactions that affect comparability of the information. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -URI http://asc.fasb.org/topic&trid=2126967 + Details
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