Income Taxes - Summary of the Gross Amount of Uncertain Tax Positions (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2017 |
Jan. 01, 2017 |
Jan. 03, 2016 |
|
| Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] | |||
| Balance at beginning of year | $ 65 | $ 56 | $ 52 |
| Increases related to prior year tax positions | 2 | 2 | |
| Decreases related to prior year tax positions | (2) | (1) | |
| Increases related to current year tax positions | 14 | 13 | 11 |
| Decreases related to lapse of statute of limitations | (2) | (2) | (8) |
| Balance at end of year | $ 79 | $ 65 | $ 56 |