Net Income Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
Mar. 29, 2015	Mar. 30, 2014
Numerator for basic net income per share:
Net income	$ 39,025us-gaap_ProfitLoss	$ 268,948us-gaap_ProfitLoss
Denominator for basic net income per share:
Weighted-average common shares outstanding	211,428	225,845
Basic net income per share	$ 0.18us-gaap_EarningsPerShareBasic	$ 1.19us-gaap_EarningsPerShareBasic
Numerator for diluted net income per share:
Net income	$ 39,025us-gaap_ProfitLoss	$ 268,948us-gaap_ProfitLoss
Denominator for diluted net income per share:
Weighted-average common shares outstanding	211,428	225,845
Incremental common shares attributable to exercise of outstanding employee stock options, SARs and ESPP (assuming proceeds would be used to purchase common stock), and RSUs	2,581	3,103
1.5% Notes due 2017	7,427	5,702
Warrants issued in conjunction with the 1.5% Notes due 2017	2,613	264
Shares used in computing diluted net income per share	224,049	234,914
Diluted net income per share	$ 0.17us-gaap_EarningsPerShareDiluted	$ 1.14us-gaap_EarningsPerShareDiluted
Antidilutive Shares
Anti-dilutive shares excluded from net income per share calculation	34,262	33,000

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