Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

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-Section 50

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The total cost of the acquired entity including the cash paid to shareholders of acquired entities, fair value of debt and equity securities issued to shareholders of acquired entities, the fair value of the liabilities assumed, and direct costs of the acquisition.

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- Definition

The amount of acquisition cost of a business combination allocated to an identifiable intangible asset that will be amortized.

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

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- Definition

Amount of goodwill arising from a business combination, which is the excess of the cost of the acquired entity over the amounts assigned to assets acquired and liabilities assumed.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 52

-Subparagraph c

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The amount of acquisition cost of a business combination allocated to liabilities assumed.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Emerging Issues Task Force (EITF)

-Number 98-1

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Amount of acquisition cost of a business combination allocated to other noncurrent assets not separately disclosed.

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-Name Emerging Issues Task Force (EITF)

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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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Completed Acquisitions Purchase Price Allocation (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 29, 2012	Sep. 29, 2012 Customer Relationships [Member]	Sep. 29, 2012 Product Technology [Member]	Sep. 29, 2012 Tradenames and other [Member]	Sep. 13, 2012 One Lambda [Member]	Sep. 13, 2012 One Lambda [Member] Customer Relationships [Member]	Sep. 13, 2012 One Lambda [Member] Product Technology [Member]	Sep. 13, 2012 One Lambda [Member] Tradenames and other [Member]	May 01, 2012 Doe & Ingalls [Member]	May 01, 2012 Doe & Ingalls [Member] Customer Relationships [Member]	May 01, 2012 Doe & Ingalls [Member] Product Technology [Member]	May 01, 2012 Doe & Ingalls [Member] Tradenames and other [Member]	Sep. 29, 2012 Other Acquisitions [Member]	Sep. 29, 2012 Other Acquisitions [Member] Customer Relationships [Member]	Sep. 29, 2012 Other Acquisitions [Member] Product Technology [Member]
Net Assets Acquired
Current assets	$ 134.8				$ 111.3				$ 21.7				$ 1.8
Property, plant and equipment	42.0				30.3				11.6				0.1
Intangible assets (Definite Lived)		406.7	180.7	34.0		335.4	172.5	17.2		68.2	1.1	16.8		3.1	7.1
Goodwill	364.5				274.4				81.3				8.8
Other assets	0.4				0				0.4
Liabilities assumed	(72.8)				(43.9)				(24.8)				(4.1)
Total Purchase Price	$ 1,090.3				$ 897.2				$ 176.3				$ 16.8
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life (in years)	13 years	13 years	11 years	13 years