Goodwill and Intangible Assets-Intangibles (Details 2) (USD $)	3 Months Ended	12 Months Ended
Mar. 29, 2015	Dec. 28, 2014
Intangible Assets
Total intangible assets, gross	$ 741,660,000sndk_TotalIntangibleAssetsGross	$ 858,844,000sndk_TotalIntangibleAssetsGross
Accumulated amortization	(242,802,000)	(316,493,000)
Intangible asset adjustment	(61,000,000)sndk_IntangibleAssetAdjustment
Total intangible assets, net	437,858,000	542,351,000
Acquired in-process research and development [Member]
Intangible Assets
Indefinite-lived Intangible Assets Acquired	61,000,000	61,000,000
Adjustments of indefinite lived intangible assets	(61,000,000)
Net carrying amount, indefinite-lived intangible assets	0	61,000,000
Developed product technology [Member]
Intangible Assets
Finite-Lived Intangible Assets, Gross	451,560,000	568,744,000
Accumulated amortization	(117,050,000)	(209,478,000)
Adjustments of finite lived intangible assets	0
Total intangible assets subject to amortization	334,510,000	359,266,000
Customer relationships [Member]
Intangible Assets
Finite-Lived Intangible Assets, Gross	64,600,000	64,600,000
Accumulated amortization	(31,459,000)	(21,009,000)
Adjustments of finite lived intangible assets	0
Total intangible assets subject to amortization	33,141,000	43,591,000
Trademarks [Member]
Intangible Assets
Finite-Lived Intangible Assets, Gross	62,500,000	62,500,000
Accumulated amortization	(10,626,000)	(7,395,000)
Adjustments of finite lived intangible assets	0
Total intangible assets subject to amortization	51,874,000	55,105,000
Technology licenses and patents [Member]
Intangible Assets
Finite-Lived Intangible Assets, Gross	102,000,000	102,000,000
Accumulated amortization	(83,667,000)	(78,611,000)
Adjustments of finite lived intangible assets	0
Total intangible assets subject to amortization	18,333,000	23,389,000
Acquisition-related Intangible Assets [Member]
Intangible Assets
Finite-Lived Intangible Assets, Gross	578,660,000	695,844,000
Accumulated amortization	(159,135,000)	(237,882,000)
Adjustments of finite lived intangible assets	0
Total intangible assets subject to amortization	419,525,000	457,962,000
Intangible assets subject to amortization [Member]
Intangible Assets
Finite-Lived Intangible Assets, Gross	680,660,000	797,844,000
Accumulated amortization	(242,802,000)	(316,493,000)
Adjustments of finite lived intangible assets	0
Total intangible assets subject to amortization	$ 437,858,000	$ 481,351,000

Adjustments of finite lived intangible assets

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Adjustments of indefinite lived intangible assets.

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Intangible asset adjustment is the amount of accumulated impairment loss for intangible assets. The impairment loss represents the future economic benefits arising from finite-lived and indefinite-lived assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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The gross amount of all intangible assets, including finite-lived and indefinite-lived intangibles.

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount of increase in assets, excluding financial assets and goodwill, lacking physical substance with an indefinite life, resulting from a business combination.

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Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit.

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Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

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-Publisher FASB

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