Business Acquisitions, Goodwill and Acquired Intangible Assets (Details 3) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 30, 2012	Jan. 01, 2012
Schedule of Intangible Assets, Including Goodwill [Line Items]
Total acquired intangible assets	109.0	93.5
Weighted average useful life in years	6 years 6 months
Goodwill	265.1	175.2
Proprietary Technology [Member]
Schedule of Intangible Assets, Including Goodwill [Line Items]
Weighted average useful life in years	6 years 4 months 24 days
Customer List/Relationships [Member]
Schedule of Intangible Assets, Including Goodwill [Line Items]
Weighted average useful life in years	6 years 6 months
Backlog [Member]
Schedule of Intangible Assets, Including Goodwill [Line Items]
Weighted average useful life in years	1 year
Trademarks [Member]
Schedule of Intangible Assets, Including Goodwill [Line Items]
Weighted average useful life in years	9 years 10 months 24 days	0 years
Trademarks [Member]
Schedule of Intangible Assets, Including Goodwill [Line Items]
Intangibles not subject to amortization	94.0	57.3
Acquisitions in 2012 [Member]
Schedule of Intangible Assets, Including Goodwill [Line Items]
Intangibles subject to amortization	73.0
Intangibles not subject to amortization	36.0
Total acquired intangible assets	109.0
Goodwill	265.1
Acquisitions in 2012 [Member] | Proprietary Technology [Member]
Schedule of Intangible Assets, Including Goodwill [Line Items]
Intangibles subject to amortization	50.4
Acquisitions in 2012 [Member] | Customer List/Relationships [Member]
Schedule of Intangible Assets, Including Goodwill [Line Items]
Intangibles subject to amortization	21.4
Acquisitions in 2012 [Member] | Backlog [Member]
Schedule of Intangible Assets, Including Goodwill [Line Items]
Intangibles subject to amortization	1.1
Acquisitions in 2012 [Member] | Trademarks [Member]
Schedule of Intangible Assets, Including Goodwill [Line Items]
Intangibles subject to amortization	0.1
Acquisitions in 2012 [Member] | Trademarks [Member]
Schedule of Intangible Assets, Including Goodwill [Line Items]
Intangibles not subject to amortization	36.0
Acquisitions in 2011 [Member]
Schedule of Intangible Assets, Including Goodwill [Line Items]
Intangibles subject to amortization		74.0
Intangibles not subject to amortization		19.5
Total acquired intangible assets		93.5
Weighted average useful life in years		9 years 6 months
Goodwill		175.2
Acquisitions in 2011 [Member] | Proprietary Technology [Member]
Schedule of Intangible Assets, Including Goodwill [Line Items]
Intangibles subject to amortization		46.0
Weighted average useful life in years		9 years
Acquisitions in 2011 [Member] | Customer List/Relationships [Member]
Schedule of Intangible Assets, Including Goodwill [Line Items]
Intangibles subject to amortization		24.6
Weighted average useful life in years		10 years
Acquisitions in 2011 [Member] | Backlog [Member]
Schedule of Intangible Assets, Including Goodwill [Line Items]
Intangibles subject to amortization		3.4
Weighted average useful life in years		1 year 7 months 17 days
Acquisitions in 2011 [Member] | Trademarks [Member]
Schedule of Intangible Assets, Including Goodwill [Line Items]
Intangibles subject to amortization		0
Acquisitions in 2011 [Member] | Trademarks [Member]
Schedule of Intangible Assets, Including Goodwill [Line Items]
Intangibles not subject to amortization		19.5