This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 25
-Paragraph 23
-URI http://asc.fasb.org/extlink&oid=34752592&loc=d3e1043-128460

Name:	us-gaap_BusinessCombinationAcquisitionRelatedCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Acquisition - Restructuring, Acquisition and Integration Costs (Details) - Central Merger - USD ($) $ in Millions		3 Months Ended		9 Months Ended
	Sep. 27, 2016	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Acquisitions
Acquisition related costs	$ 0.8	$ 0.2	$ 1.6	$ 3.5	$ 3.5
General and administrative expenses
Acquisitions
Acquisition related costs		0.2	1.6	1.1	3.5
Depreciation and amortization
Acquisitions
Acquisition related costs		$ 0.0	$ 0.0	$ 2.4	$ 0.0