Stockholders' Equity - Rollforward of Common Stock Outstanding (Details) - shares	3 Months Ended
	Apr. 01, 2018	Mar. 26, 2017
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares outstanding at beginning of the period	103,297,525	73,900,000
Stock issued for cash	0	11,900,000
Stock issued for employee stock purchase plan, stock options and restricted stock units exercised	200,000	600,000
Shares outstanding at end of the period	103,513,103	86,400,000