Stockholders' Equity - Rollforward of Common Stock Outstanding (Details) - shares	9 Months Ended
	Sep. 30, 2018	Oct. 01, 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	28,000,000
Stock issued for employee stock purchase plan, stock options and restricted stock units exercised	500,000	1,400,000
Shares outstanding at end of the period	103,752,514	103,300,000