Net Income Per Share (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 27, 2015	Sep. 28, 2014	Sep. 27, 2015	Sep. 28, 2014
Common Stock:
Weighted average basic shares outstanding	292,256	366,880	340,869	371,714
Dilutive effect of stock options and restricted shares	4,695	5,272	6,032	6,178
Weighted average diluted shares outstanding	296,951	372,152	346,901	377,892
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	3,118	3,886	1,439	4,833