Net Income Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 27, 2015	Mar. 28, 2014
Basic:
Net income	$ 94,852	$ 116,514
Basic weighted shares outstanding (in shares)	301,308,000	316,552,000
Net income per share (in dollars per share)	$ 0.31	$ 0.37
Diluted:
Net income	$ 94,852	$ 116,514
Basic weighted shares outstanding (in shares)	301,308,000	316,552,000
Stock options, ESPP, and restricted stock unit shares (in shares)	1,977,000	2,349,000
Diluted weighted shares outstanding	303,285,000	318,901,000
Net income per share (in dollars per share)	$ 0.31	$ 0.37
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	1,200,000	1,900,000