Business Acquisitions, Goodwill and Intangible Assets (Details 3) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jan. 01, 2012 Y	Jan. 02, 2011 Y
Summary of the Intangible Assets Acquired
Intangible assets	$ 74.0	$ 16.3
Weighted average useful life in years	9.5	7.3
Goodwill [Member]
Summary of the Intangible Assets Acquired
Intangible assets	175.2	46.4
Trademarks [Member]
Summary of the Intangible Assets Acquired
Intangible assets	19.5	3.2
Proprietary Technology [Member]
Summary of the Intangible Assets Acquired
Intangible assets	46.0	9.2
Weighted average useful life in years	9	6.4
Customer List/Relationships [Member]
Summary of the Intangible Assets Acquired
Intangible assets	24.6	6.3
Weighted average useful life in years	10.0	7.2
Backlog [Member]
Summary of the Intangible Assets Acquired
Intangible assets	$ 3.4	$ 0.8
Weighted average useful life in years	1.6	0.8