Fair Value (Details) (USD $) In Thousands, unless otherwise specified	Jun. 29, 2013	Dec. 29, 2012
Short-term investments:
Available-for-sale securities	$ 101,251	$ 100,704
Trading securities held in Non - Qualified Deferred Compensation Plan, or NQDC	21,472	24,329
2015 Notes Hedges	335,131	303,154
Foreign Currency Contract, Asset, Fair Value Disclosure		1,737
Total Assets	861,508	996,258
Liabilities
Acquisition-related contingent consideration	3,832	4,218
2015 Notes Embedded Conversion Derivative	335,131	303,154
Foreign Currency Contracts, Liability, Fair Value Disclosure	1,498
Total Liabilities	340,461	307,372
Money market funds [Member]
Assets
Cash equivalents	403,153	566,334
Corporate debt securities [Member]
Assets
Cash equivalents	501
Short-term investments:
Available-for-sale securities	34,205	31,359
Bank certificates of deposit [Member]
Short-term investments:
Available-for-sale securities	26,215	27,826
United States Treasury securities [Member]
Short-term investments:
Available-for-sale securities	25,856	23,239
United States government agency securities [Member]
Short-term investments:
Available-for-sale securities	11,223	10,258
Commercial paper [Member]
Short-term investments:
Available-for-sale securities	1,797	5,783
Marketable equity securities [Member]
Short-term investments:
Available-for-sale securities	1,955	2,239
Fair Value Measurements, Level 1 [Member]
Short-term investments:
Trading securities held in Non - Qualified Deferred Compensation Plan, or NQDC	21,472	24,329
2015 Notes Hedges	0	0
Foreign Currency Contract, Asset, Fair Value Disclosure		0
Total Assets	463,659	626,399
Liabilities
Acquisition-related contingent consideration	0	0
2015 Notes Embedded Conversion Derivative	0	0
Foreign Currency Contracts, Liability, Fair Value Disclosure	0
Total Liabilities	0	0
Fair Value Measurements, Level 1 [Member] \| Money market funds [Member]
Assets
Cash equivalents	403,153	566,334
Fair Value Measurements, Level 1 [Member] \| Corporate debt securities [Member]
Assets
Cash equivalents	0
Short-term investments:
Available-for-sale securities	0	0
Fair Value Measurements, Level 1 [Member] \| Bank certificates of deposit [Member]
Short-term investments:
Available-for-sale securities	0	0
Fair Value Measurements, Level 1 [Member] \| United States Treasury securities [Member]
Short-term investments:
Available-for-sale securities	25,856	23,239
Fair Value Measurements, Level 1 [Member] \| United States government agency securities [Member]
Short-term investments:
Available-for-sale securities	11,223	10,258
Fair Value Measurements, Level 1 [Member] \| Commercial paper [Member]
Short-term investments:
Available-for-sale securities	0	0
Fair Value Measurements, Level 1 [Member] \| Marketable equity securities [Member]
Short-term investments:
Available-for-sale securities	1,955	2,239
Fair Value Measurements, Level 2 [Member]
Short-term investments:
Trading securities held in Non - Qualified Deferred Compensation Plan, or NQDC	0	0
2015 Notes Hedges	335,131	303,154
Foreign Currency Contract, Asset, Fair Value Disclosure		1,737
Total Assets	397,849	369,859
Liabilities
Acquisition-related contingent consideration	0	0
2015 Notes Embedded Conversion Derivative	335,131	303,154
Foreign Currency Contracts, Liability, Fair Value Disclosure	1,498
Total Liabilities	336,629	303,154
Fair Value Measurements, Level 2 [Member] \| Money market funds [Member]
Assets
Cash equivalents	0	0
Fair Value Measurements, Level 2 [Member] \| Corporate debt securities [Member]
Assets
Cash equivalents	501
Short-term investments:
Available-for-sale securities	34,205	31,359
Fair Value Measurements, Level 2 [Member] \| Bank certificates of deposit [Member]
Short-term investments:
Available-for-sale securities	26,215	27,826
Fair Value Measurements, Level 2 [Member] \| United States Treasury securities [Member]
Short-term investments:
Available-for-sale securities	0	0
Fair Value Measurements, Level 2 [Member] \| United States government agency securities [Member]
Short-term investments:
Available-for-sale securities	0	0
Fair Value Measurements, Level 2 [Member] \| Commercial paper [Member]
Short-term investments:
Available-for-sale securities	1,797	5,783
Fair Value Measurements, Level 2 [Member] \| Marketable equity securities [Member]
Short-term investments:
Available-for-sale securities	0	0
Fair Value Measurements, Level 3 [Member]
Short-term investments:
Trading securities held in Non - Qualified Deferred Compensation Plan, or NQDC	0	0
2015 Notes Hedges	0	0
Foreign Currency Contract, Asset, Fair Value Disclosure		0
Total Assets	0	0
Liabilities
Acquisition-related contingent consideration	3,832	4,218
2015 Notes Embedded Conversion Derivative	0	0
Foreign Currency Contracts, Liability, Fair Value Disclosure	0
Total Liabilities	3,832	4,218
Fair Value Measurements, Level 3 [Member] \| Money market funds [Member]
Assets
Cash equivalents	0	0
Fair Value Measurements, Level 3 [Member] \| Corporate debt securities [Member]
Assets
Cash equivalents	0
Short-term investments:
Available-for-sale securities	0	0
Fair Value Measurements, Level 3 [Member] \| Bank certificates of deposit [Member]
Short-term investments:
Available-for-sale securities	0	0
Fair Value Measurements, Level 3 [Member] \| United States Treasury securities [Member]
Short-term investments:
Available-for-sale securities	0	0
Fair Value Measurements, Level 3 [Member] \| United States government agency securities [Member]
Short-term investments:
Available-for-sale securities	0	0
Fair Value Measurements, Level 3 [Member] \| Commercial paper [Member]
Short-term investments:
Available-for-sale securities	0	0
Fair Value Measurements, Level 3 [Member] \| Marketable equity securities [Member]
Short-term investments:
Available-for-sale securities	$ 0	$ 0

This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.

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