Share-based Compensation Expense - Narrative (Details) $ in Millions |
6 Months Ended |
---|---|
Jul. 01, 2018
USD ($)
| |
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] | |
Unrecognized compensation cost related to stock options, restricted stock, and ESPP shares granted to date | $ 328 |
Weighted-average period of unrecognized compensation cost related to stock options, restricted stock, and ESPP shares granted to date | 2 years 4 months |