Borrowings (Details)	12 Months Ended
	Dec. 29, 2018
Category 1 [Member]
Debt Instrument, Redemption [Line Items]
Funded Debt to Adjusted EBITDA Ratio	Greater than or equal to 2.50 to 1.0
Revolving Eurodollar Borrowing	2.50%
Term Eurodollar Borrowing	2.75%
ABR Revolving Borrowing	0.50%
ABR Term Borrowing	0.75%
Letter Of Credit Fee	2.50%
Commitment Fee	0.45%
Category 2 [Member]
Debt Instrument, Redemption [Line Items]
Funded Debt to Adjusted EBITDA Ratio	Greater than or equal to 2.25 to 1.0 but less than 2.50 to 1.0
Revolving Eurodollar Borrowing	2.25%
Term Eurodollar Borrowing	2.50%
ABR Revolving Borrowing	0.25%
ABR Term Borrowing	0.50%
Letter Of Credit Fee	2.25%
Commitment Fee	0.40%
Category 3 [Member]
Debt Instrument, Redemption [Line Items]
Funded Debt to Adjusted EBITDA Ratio	Greater than or equal to 2.00 to 1.0 but less than 2.50 to 1.0
Revolving Eurodollar Borrowing	2.00%
Term Eurodollar Borrowing	2.25%
ABR Revolving Borrowing	0.00%
ABR Term Borrowing	0.25%
Letter Of Credit Fee	2.00%
Commitment Fee	0.35%
Category 4 [Member]
Debt Instrument, Redemption [Line Items]
Funded Debt to Adjusted EBITDA Ratio	Greater than or equal to 1.75 to 1.0 but less than 2.00 to 1.0
Revolving Eurodollar Borrowing	1.75%
Term Eurodollar Borrowing	2.00%
ABR Revolving Borrowing	(0.25%)
ABR Term Borrowing	0.00%
Letter Of Credit Fee	1.75%
Commitment Fee	0.30%
Category 5 [Member]
Debt Instrument, Redemption [Line Items]
Funded Debt to Adjusted EBITDA Ratio	Less than 1.75 to 1.0
Revolving Eurodollar Borrowing	1.50%
Term Eurodollar Borrowing	1.75%
ABR Revolving Borrowing	(0.50%)
ABR Term Borrowing	(0.25%)
Letter Of Credit Fee	1.50%
Commitment Fee	0.30%