Goodwill and Intangible Assets - Purchased Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2014	Sep. 29, 2013	Sep. 28, 2014	Sep. 29, 2013	Dec. 29, 2013
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Value	$ 212.7		$ 212.7		$ 207.7
Accumulated Amortization	(161.8)		(161.8)		(144.7)
Net Value	50.9		50.9		63.0
Gross Value	219.6		219.6		214.6
Net Value	57.8		57.8		69.9
Consolidated amortization expense related to intangible assets subject to amortization	5.7	9.0	17.0	27.3
Trade names
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Value	6.9		6.9		6.9
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Value	99.0		99.0		97.7
Accumulated Amortization	(66.5)		(66.5)		(53.7)
Net Value	32.5		32.5		44.0
Contracts and backlog
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Value	82.7		82.7		80.0
Accumulated Amortization	(79.7)		(79.7)		(78.7)
Net Value	3.0		3.0		1.3
Developed technology and technical know-how
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Value	23.1		23.1		22.1
Accumulated Amortization	(10.3)		(10.3)		(8.6)
Net Value	12.8		12.8		13.5
Trade names
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Value	6.1		6.1		6.1
Accumulated Amortization	(4.6)		(4.6)		(3.1)
Net Value	1.5		1.5		3.0
Favorable operating lease
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Value	1.8		1.8		1.8
Accumulated Amortization	(0.7)		(0.7)		(0.6)
Net Value	$ 1.1		$ 1.1		$ 1.2