Consolidated Statements of Shareholders' Equity (Parenthetical) - $ / shares	6 Months Ended		12 Months Ended
	Dec. 31, 2015	Dec. 27, 2014	Dec. 31, 2016	Jun. 27, 2015	Jun. 28, 2014
Statement of Stockholders' Equity [Abstract]
Dividends declared per share (in dollars per share)	$ 0.25	$ 0.21	$ 0.580	$ 0.4600	$ 0.3900