Summary of Significant Accounting Policies (Product Warranty Liability) (Details) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Jan. 02, 2016 |
Jan. 03, 2015 |
|
| Movement in Standard Product Warranty Accrual | ||
| Balance at beginning of period | $ 35 | $ 37 |
| Warranty (benefit) expense recognized | (4) | 3 |
| Warranty credits issued | (7) | (5) |
| Balance at end of period | 31 | 35 |
| Thoratec [Member] | ||
| Movement in Standard Product Warranty Accrual | ||
| Assumed from Thoratec Corporation (Thoratec) | $ 7 | $ 0 |