Amount of cash paid to acquire the entity.

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Percentage of voting equity interests acquired in the business combination.

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The amount of acquisition cost of a business combination allocated to assets acquired.

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The amount of acquisition cost of a business combination allocated to receivables.

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Amount of acquisition cost of a business combination allocated to assets, excluding financial assets and goodwill, lacking physical substance.

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The amount of acquisition cost of a business combination allocated to property, plant and equipment to be used in ongoing operations.

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Total revenue reported by the acquired entity for its previous full fiscal year before the business acquisition.

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Acquisitions (Details) (USD $) In Millions, unless otherwise specified		12 Months Ended
	Dec. 29, 2012 Westemeyer Industries, Inc. [Member]	Dec. 25, 2010 Tube Forming, L.P. [Member]	Dec. 31, 2011 Tube Forming, L.P. [Member]	Dec. 31, 2011 Linesets, Inc. [Member]
Business Acquisition [Line Items]
Portion of outstanding stock acquired (in hundredths)	100.00%
Cost of acquisition	$ 11.6		$ 6.9	$ 2.1
Fair value of assets acquired	7.5
Fair value of assets acquired - receivables	2.0
Fair value of assets acquired - inventories	1.9
Fair value of assets acquired - property, plant and equipment	3.6
Fair value of assets acquired - current liabilities	1.0
Remaining purchase price allocated to goodwill	2.3
Remaining purchase price allocated to other intangible assets	2.7
Estimated net sales		35.0
Approximate amount paid for certain assets	$ 11.6		$ 6.9	$ 2.1