Business Combinations and Investments, Goodwill and Acquired Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 30, 2012
Estimated fair values allocated to the assets acquired and liabilities
Goodwill, net	$ 1,014.8	$ 990.2
RESON A/S [Member]
Estimated fair values allocated to the assets acquired and liabilities
Current assets	25.9
Property, plant and equipment	3.8
Goodwill, net	35.1
Acquired intangible assets	25.5
Current liabilities	(15.6)
Long-term liabilities	(5.0)
Net assets acquired	$ 69.7