v3.8.0.1
Balance Sheet Account Details - Summary of Changes in Reserve for Product Warranties (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Jan. 01, 2017
Jan. 03, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]      
Balance as of beginning of period $ 13 $ 17 $ 16
Additions charged to cost of revenue 26 21 28
Repairs and replacements (22) (25) (27)
Balance as of end of period $ 17 $ 13 $ 17