Goodwill and Intangible Assets - Purchased Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 24, 2012	Jun. 30, 2013	Jun. 24, 2012	Dec. 30, 2012
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Value	$ 207.7		$ 207.7		$ 207.7
Accumulated Amortization	(126.8)		(126.8)		(108.5)
Net Value	80.9		80.9		99.2
Gross Value	6.9		6.9		6.9
Gross Value	214.6		214.6		214.6
Net Value	87.8		87.8		106.1
Consolidated amortization expense related to intangible assets subject to amortization	9.0	8.9	18.3	19.4
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Value	97.7		97.7		97.7
Accumulated Amortization	(45.1)		(45.1)		(36.2)
Net Value	52.6		52.6		61.5
Contracts and backlog
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Value	80.0		80.0		80.0
Accumulated Amortization	(71.5)		(71.5)		(64.3)
Net Value	8.5		8.5		15.7
Developed technology and technical know-how
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Value	22.1		22.1		22.1
Accumulated Amortization	(7.5)		(7.5)		(6.4)
Net Value	14.6		14.6		15.7
Trade Names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Value	6.1		6.1		6.1
Accumulated Amortization	(2.2)		(2.2)		(1.2)
Net Value	3.9		3.9		4.9
Favorable operating lease
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Value	1.8		1.8		1.8
Accumulated Amortization	(0.5)		(0.5)		(0.4)
Net Value	1.3		1.3		1.4
Trade Names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Value	$ 6.9		$ 6.9		$ 6.9