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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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

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Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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Amount of increase in assets, excluding financial assets and goodwill, lacking physical substance with an indefinite life, from an acquisition.

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The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

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Acquisitions - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Dec. 31, 2015	Sep. 26, 2015	Jun. 27, 2015	Sep. 30, 2016	Sep. 26, 2015
Business Acquisition [Line Items]
Goodwill	$ 4,259.0			$ 4,251.7
Payments to Acquire Businesses, Net of Cash Acquired	0.9		$ 96.0	0.0	$ 1,913.0
Acquisitions/Divestitures	43.2
Finite-lived Intangible Assets Acquired	53.3
ERICO Global Company [Member]
Business Acquisition [Line Items]
Goodwill	1,061.9			1,031.0
Indefinite-lived Intangible Assets Acquired				228.4
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	1,033.8			1,033.8
Payments to Acquire Businesses, Net of Cash Acquired		$ 1,800.0
Finite-lived Intangible Assets Acquired				$ 805.4
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life				21 years
Canada, Dollars
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired	$ 1.2		$ 120.5