Consolidated Statements of Shareholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Consolidated Statements of Shareholders' Equity [Abstract]
Cash dividends declared, per share (in dollars per share)	$ 0.44	$ 0.44	$ 0.45