Summary of Significant Accounting Policies (Details) In Thousands, unless otherwise specified	3 Months Ended
Apr. 01, 2012	Apr. 03, 2011
Weighted-average shares used to calculate basic and diluted net income per share
Weighted average shares outstanding (in shares)	122,642	126,517
Effect of dilutive potential common shares from:
Convertible senior notes (in shares)	991	10,953
Equity awards (in shares)	4,060	5,790
Warrants sold in connection with convertible senior notes (in shares)	6,166	9,869
Weighted-average shares used in calculation of diluted net income per share (in shares)	133,859	153,129
Potentially dilutive shares excluded from calculation due to anti-dilutive effect (in shares)	2,538	831

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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-Name Accounting Standards Codification

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Diluted Earnings Per Share

-URI http://asc.fasb.org/extlink&oid=6510752

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-Topic 260

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+ Details

- Definition

The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

+ References+ Details

- Definition

Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

+ References

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+ Details