Balance Sheet Account Details (Details Textual) - USD ($) $ in Millions				3 Months Ended		6 Months Ended
	Jun. 26, 2015	Mar. 13, 2015	Dec. 31, 2014	Jun. 28, 2015	Jun. 29, 2014	Jun. 28, 2015	Jun. 29, 2014	Jun. 25, 2015	Mar. 12, 2015	Dec. 30, 2014	Dec. 28, 2014
Company's cost-method investments in non-publicly traded companies				$ 51.9		$ 51.9					$ 37.2
Revenue from Company's cost-method investments in non-publicly traded companies				14.1	$ 10.1	31.3	$ 16.7
Cost-method investment gain						15.1
Derivative, Notional Amount				$ 65.5		$ 65.5					$ 61.0
Instrument warranty period						1 year
Lease Term	20 years	15 years	16 years
Future minimum payment due for lease addition in period								$ 147.9	$ 44.1	$ 204.0
Minimum [Member]
Warranty on consumable sales through the expiration date						6 months
Maximum [Member]
Warranty on consumable sales through the expiration date						12 months