Summary of Significant Accounting Policies Summary of Significant Accounting Policies - New Accounting Standards Not Yet Adopted (Details Textual) - Accounting Standards Update 2016-02 [Member] $ in Millions	Dec. 30, 2018 USD ($)
Maximum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use assets	$ 85
Lease liabilities	85
Minimum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use assets	75
Lease liabilities	$ 75