Balance Sheet Account Details - Narrative - Property and Equipment (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2017 |
Jan. 01, 2017 |
Jan. 03, 2016 |
|
| Property, Plant and Equipment [Line Items] | |||
| Non-cash expenditures included in property and equipment, net | $ 117 | $ 220 | $ 24 |
| Construction In Progress And Build to Suit Lease Liability [Member] | |||
| Property, Plant and Equipment [Line Items] | |||
| Non-cash expenditures included in property and equipment, net | $ 79 | $ 193 | $ 10 |