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Noncontrolling Interests (Narrative) (Details) - USD ($) $ in Millions		9 Months Ended
	Jul. 19, 2017	Sep. 30, 2017	Apr. 02, 2015
Robtec [Member]
Business Acquisition [Line Items]
Acquired ownership percentage		70.00%
Acquisition date		Nov. 25, 2014
Easyway [Member]
Business Acquisition [Line Items]
Acquired ownership percentage	5.00%	70.00%	65.00%
Value of voting rights acquired	$ 2.3

X

- Definition

Date when the acquirer obtains control of the acquiree, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 25
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=73531572&loc=d3e845-128460

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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- Definition

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.

+ References

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- Definition

Percentage of voting equity interests acquired at the acquisition date in the business combination.

+ References

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

+ References

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