Goodwill and Intangible Assets (Details Textual) - USD ($)	3 Months Ended			6 Months Ended
	Jun. 28, 2015	Mar. 29, 2015	Jun. 29, 2014	Jun. 28, 2015	Jun. 29, 2014	Dec. 28, 2014
Goodwill and Finite-lived Intangible Assets
Impairment of acquisition-related intangible assets	$ 0		$ 0	$ (61,000,000)	$ 0
Indefinite-Lived Intangible Assets (Excluding Goodwill)
Total intangible assets, net	390,355,000			390,355,000		$ 542,351,000
Fusion-io Inc [Member]
Indefinite-Lived Intangible Assets (Excluding Goodwill)
Total intangible assets, net	$ 283,500,000			$ 283,500,000
Acquired in-process research and development [Member]
Goodwill and Finite-lived Intangible Assets
Impairment of acquisition-related intangible assets		$ (61,000,000)