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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585

Name:	us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Subsequent Events (Details) - USD ($) $ in Millions		6 Months Ended
Subsequent Events (Details) - USD ($) $ in Millions	Jul. 03, 2017	Jun. 30, 2017	Jun. 30, 2016
Subsequent Event [Line Items]
Aggregate cash purchase price, net of cash acquired		$ 225.9	$ 103.1
Drexel Metals, Inc. \| Subsequent Event
Subsequent Event [Line Items]
Aggregate cash purchase price, net of cash acquired	$ 54.0