| Component: (Network and Table) | |
|---|---|
| Network | 2404406 - Disclosure - Balance Sheet Account Details - Summary of Accounts Receivable (Details) (http://www.illumina.com/role/BalanceSheetAccountDetailsSummaryOfAccountsReceivableDetails) |
| Table | Schedule of Accounts, Notes, Loans and Financing Receivable [Table] |
| Reporting Entity [Axis] | 0001110803 (http://www.sec.gov/CIK) |
| Accounts Receivable [Line Items] | Period [Axis] | |||||
|---|---|---|---|---|---|---|
2017-01-01 | 2016-01-03 | |||||
| Accounts, Notes, Loans and Financing Receivable by Receivable Type [Axis] | Accounts, Notes, Loans and Financing Receivable by Receivable Type [Axis] | |||||
| Accounts receivable from product and service sales [Member] | Other receivables [Member] | Receivable Type [Domain] | Accounts receivable from product and service sales [Member] | Other receivables [Member] | Receivable Type [Domain] | |
Total accounts receivable, gross | ||||||
Allowance for doubtful accounts | ( | ( | ||||
Total accounts receivable, net | 381,316,000 | 385,529,000 | ||||