Acquisitions (Narrative) (Details) (VasoNova Inc., [Member], USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 26, 2011 Purchased Technology [Member]	Jun. 26, 2011 Trade Names [Member]	Mar. 31, 2011	Jan. 10, 2011	Jan. 10, 2011 Maximum [Member]	Jan. 10, 2011 Minimum [Member]
Outstanding equity acquired, percentage				100.00%
Payment to the former security holders			$ 6.0	$ 24.9
Additional agreed contingent payments upon the achievement of certain regulatory and sales targets					30.0	15.0
Estimated fair value of the consideration				40.3
Estimated fair value of contingent consideration to be paid to former security holders				15.4
Estimated fair values of intangible assets acquired	$ 26.8	$ 2.8
Useful life of intangible assets acquired, years	15	10