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Noncontrolling Interests (Narrative) (Details) - USD ($) $ in Millions	Jul. 19, 2017	Jun. 30, 2018	Apr. 02, 2015
Robtec
Business Acquisition [Line Items]
Acquired ownership percentage		70.00%
Easyway
Business Acquisition [Line Items]
Acquired ownership percentage	5.00%	70.00%	65.00%
Value of voting rights acquired	$ 2.3

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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.

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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.

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