Basis of Presentation and Significant Accounting Policies (Details) $ in Millions |
6 Months Ended | |
|---|---|---|
|
Jun. 30, 2018
segment
|
Dec. 30, 2017
USD ($)
|
|
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | ||
| Number of reportable segments | segment | 2 | |
| Retained Earnings | Accounting Standards Update 2016-01 | ||
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | ||
| Cumulative effect adjustment | $ | $ 2 | |
| Minimum | ||
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | ||
| Distributor payment due, standard contractual term | 30 days | |
| Maximum | ||
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | ||
| Distributor payment due, standard contractual term | 60 days |