v3.8.0.1
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