Summary of Significant Accounting Policies - New Accounting Standards Not Yet Adopted (Details) - Accounting Standards Update 2014-09 [Member]	12 Months Ended
Dec. 29, 2018	Dec. 31, 2017
Scenario, Forecast [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Percentage of Revenue Mix Recognizable Over Time	90.00%
Scenario, Plan [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Percentage of Existing Backlog To Be Adjusted Through Retained Earnings		3.00%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration